{"id":425089,"date":"2026-02-07T18:20:42","date_gmt":"2026-02-07T17:20:42","guid":{"rendered":"https:\/\/climatescience.press\/?p=425089"},"modified":"2026-02-07T18:33:33","modified_gmt":"2026-02-07T17:33:33","slug":"holocene-warming","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=425089","title":{"rendered":"Holocene Warming"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"687\" height=\"1024\" data-attachment-id=\"425103\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425103\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?fit=784%2C1168&amp;ssl=1\" data-orig-size=\"784,1168\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0- Holocene Warming\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?fit=687%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?resize=687%2C1024&#038;ssl=1\" alt=\"Graph illustrating Holocene warming temperatures compared to pre-industrial levels, highlighting warm intervals and temperature anomalies over the last 11,000 years.\" class=\"wp-image-425103\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?resize=687%2C1024&amp;ssl=1 687w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?resize=201%2C300&amp;ssl=1 201w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?resize=768%2C1144&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?resize=640%2C953&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming.jpg?w=784&amp;ssl=1 784w\" sizes=\"auto, (max-width: 687px) 100vw, 687px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">From <a href=\"https:\/\/wattsupwiththat.com\/2026\/02\/05\/holocene-warming\/\">Watts Up With That?<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">By <a href=\"https:\/\/wattsupwiththat.com\/author\/andymay2014_69488455_3713736997\/\">Andy May<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"393\" data-attachment-id=\"425106\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425106\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?fit=1511%2C821&amp;ssl=1\" data-orig-size=\"1511,821\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0Screenshot 2026-02-07 151319\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?fit=723%2C393&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=723%2C393&#038;ssl=1\" alt=\"Graph comparing temperatures of the Makassar Strait and Greenland from 10,000 BC to present, highlighting significant climatic periods such as the Holocene Climatic Optimum and the Little Ice Age. It also shows a temperature difference of 3.6\u00b0C at around 6,000 BC.\" class=\"wp-image-425106\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=1024%2C556&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=300%2C163&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=768%2C417&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=640%2C348&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?resize=1200%2C652&amp;ssl=1 1200w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?w=1511&amp;ssl=1 1511w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?w=1446&amp;ssl=1 1446w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">I find it amazing that some papers still state:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-medium-font-size wp-block-paragraph\">\u201cair temperatures in the [Arctic or globally] are now at their warmest in the past 6,800\u20137,800 y, and that the recent rate of temperature change is unprecedented over the entire Holocene.\u201d (Lecavalier et al., 2017)<\/p>\n<\/blockquote>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">While it is remotely possible that current Arctic or global average temperature is higher than any seen in the past 6,800 years, it is very unlikely and can\u2019t be demonstrated with data we have today. It is almost certainly true that the rate of change in global or Arctic temperature observed recently is not unprecedented in the&nbsp;<a href=\"https:\/\/www.britannica.com\/science\/Holocene-Epoch\">Holocene Epoch<\/a>. This modern myth has been thoroughly debunked in the literature and seeing it pop up in&nbsp;<em><a href=\"https:\/\/www.pnas.org\/\">PNAS<\/a><\/em>&nbsp;and elsewhere is disconcerting. I thought peer-review was supposed to catch such errors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Warmest in the past 6,800-7,800 years<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The first assertion in Lecavalier et al.\u2019s paper is that the Arctic is now warmer than at any time in the past 6,800-7,800 years. The warmest time in the Holocene (12,000 years ago to the present) is generally accepted to be the&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2024\/03\/15\/the-holocene-climatic-optimum-and-the-pre-industrial\/\">Holocene Climatic Optimum<\/a>&nbsp;or the Holocene Thermal Maximum, both names are used. Two of my favorite Northern Hemisphere Holocene temperature proxies suggest that today is only warmer than the past 1,000-2,000 years as shown in figure 1.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"407\" data-attachment-id=\"425091\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425091\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?fit=1280%2C720&amp;ssl=1\" data-orig-size=\"1280,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?fit=723%2C407&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=723%2C407&#038;ssl=1\" alt=\"Graph depicting temperature changes in the Makassar Strait and Greenland from 10,000 BC to the present, highlighting key climatic periods such as the Holocene Climatic Optimum and the Little Ice Age, with annotations indicating temperature fluctuations and significant events.\" class=\"wp-image-425091\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=640%2C360&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Figure-1_Makassar-Strait-and-Vinther-Greenland-reconstruction.webp?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Figure 1. The Vinther Greenland ice core (orange) and the Rosenthal Makassar Strait (black) temperature proxies. Sources: (Vinther et al., 2009) &amp; (Rosenthal et al., 2013).<\/figcaption><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">In figure 1 the Rosenthal Makassar Strait proxy represents sea surface temperature (SST) in the Northern Pacific and the Vinther Greenland proxy is an air temperature proxy in northern Greenland (more details on Vinther and Rosenthal can be seen here). Kaufman et al. (2009) show us a set of Arctic proxies and show them combined in figure 2, which is from the corrected version of the Kaufman, 2009 supplementary materials.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"950\" data-attachment-id=\"425093\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425093\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?fit=1139%2C1497&amp;ssl=1\" data-orig-size=\"1139,1497\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"image\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?fit=723%2C950&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?resize=723%2C950&#038;ssl=1\" alt=\"Graph displaying summer Arctic average temperature over the years AD, using all proxies.\" class=\"wp-image-425093\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?resize=779%2C1024&amp;ssl=1 779w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?resize=228%2C300&amp;ssl=1 228w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?resize=768%2C1009&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?resize=640%2C841&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-72.png?w=1139&amp;ssl=1 1139w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Figure 2. Kaufman\u2019s combined proxies (top), ice core proxies (second from top), sediment proxies (third), and tree ring proxies (bottom). Source: (Kaufman et al., 2009) supplementary materials, corrected (see\u00a0<a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.327.5966.644-d\">here<\/a>).<\/figcaption><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The same modern discrepancy between the tree rings and the other proxies can be seen in Kaufman et al.\u2019s figure 3A, reproduced as our figure 3 below.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"176\" data-attachment-id=\"425095\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425095\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?fit=977%2C238&amp;ssl=1\" data-orig-size=\"977,238\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"image\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?fit=723%2C176&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?resize=723%2C176&#038;ssl=1\" alt=\"Line graph displaying standardized data over time with four distinct lines representing 'all records' in gray, 'trees' in green, 'lakes' in red, and 'ice' in blue.\" class=\"wp-image-425095\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?w=977&amp;ssl=1 977w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?resize=300%2C73&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?resize=768%2C187&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-73.png?resize=640%2C156&amp;ssl=1 640w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Figure 3. Kaufman et al. figure 3A. Arctic proxy overlay in standardized units. Source: (Kaufman et al., 2009). The tree ring proxies are shown in green and they diverge from the others.<br>There is general agreement that summer Arctic warming is driven by Earth\u2019s orbital cycles, especially precession and obliquity (see figure 4). This post was inspired by a discussion on a\u00a0<a href=\"https:\/\/andymaypetrophysicist.com\/2026\/02\/01\/re-evaluating-the-concern-of-climate-change\/\">previous post<\/a>, the critical comment is\u00a0<a href=\"https:\/\/wattsupwiththat.com\/2026\/02\/02\/re-evaluating-the-concern-of-climate-change\/#comment-4161793\">here<\/a>.<\/figcaption><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">There is general agreement that summer Arctic warming is driven by Earth\u2019s orbital cycles, especially precession and obliquity (see figure 4). This post was inspired by a discussion on a\u00a0<a href=\"https:\/\/andymaypetrophysicist.com\/2026\/02\/01\/re-evaluating-the-concern-of-climate-change\/\">previous post<\/a>, the critical comment is\u00a0<a href=\"https:\/\/wattsupwiththat.com\/2026\/02\/02\/re-evaluating-the-concern-of-climate-change\/#comment-4161793\">here<\/a>.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Figures 2 &amp; 3 show that both recent Greenland area sediment and ice core proxies decline after ~1940, but the tree ring proxies mostly stay high. We will remember that the late Keith Briffa (Briffa et al., 1998b) warned us that tree ring proxies diverged from other proxies in 1998, he speculated that increasing CO<sub>2<\/sub>\u00a0probably had a lot do with this divergence. The divergence and Michael Mann\u2019s attempt to hide the problem led to the now famous \u201c<a href=\"https:\/\/wattsupwiththat.com\/2011\/11\/30\/hide-the-decline-worse-than-we-thought\/\">hide the decline<\/a>\u201d (McIntyre, 2014) &amp; (McIntyre, 2011) scandal after the\u00a0<a href=\"https:\/\/wattsupwiththat.com\/2009\/11\/19\/breaking-news-story-hadley-cru-has-apparently-been-hacked-hundreds-of-files-released\/\">2009 CRU email dump<\/a>. I have no answer for the divergence or the apparent time shifts between proxies in figures 2 &amp; 3 but warn the reader that proxy temperatures are not temperatures that are comparable to thermometer readings we make today, they are just proxies and dates for the proxy readings are uncertain.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"622\" data-attachment-id=\"425098\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425098\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?fit=794%2C683&amp;ssl=1\" data-orig-size=\"794,683\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"image\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?fit=723%2C622&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?resize=723%2C622&#038;ssl=1\" alt=\"Diagram illustrating Milankovitch Cycles with labeled parameters: eccentricity, precession, tilt, and obliquity, alongside a graph showing insolation changes over time due to orbital variations.\" class=\"wp-image-425098\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?w=794&amp;ssl=1 794w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?resize=300%2C258&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?resize=768%2C661&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/image-74.png?resize=640%2C551&amp;ssl=1 640w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Figure 4. The top illustration, from (Haigh, 2011), shows the elements of the Milankovich orbital cycles, eccentricity, precession, and obliquity (or axial tilt). The bottom illustration from (Vin\u00f3s, 2017) shows the climatic impact since 40,000 years BP.<\/figcaption><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The top illustration in figure 4 shows the elements of the Milankovitch cycles (Haigh, 2011). The seasonal curves in the bottom illustration (Vin\u00f3s, 2017) show the impact of precession. The seasonal curves are labeled with the hemisphere (N or S) and the first letters of the months. The heavy curves are the summer months of the Northern Hemisphere (red) and the Southern Hemisphere (blue). The changes in insolation are represented by the background color (scale to the right in W\/m<sup>2<\/sup>). The black curve shows the&nbsp;<a href=\"https:\/\/en.wikipedia.org\/wiki\/%CE%9418O\">\u03b4<sup>18<\/sup>O<\/a>&nbsp;isotope changes from the&nbsp;<a href=\"https:\/\/en.wikipedia.org\/wiki\/North_Greenland_Ice_Core_Project\">NGRIP<\/a>&nbsp;Greenland ice core analysis, a temperature proxy (Alley, 2000). The \u03b4<sup>18<\/sup>O temperature proxy has no scale, but higher temperatures are up and lower temperatures down. The vertical scale is latitude, and the horizontal scale is time from 40,000 years ago to the present and zero on the background color scale is the insolation by latitude today.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The changes in the background color (insolation) in the bottom illustration in figure 4 are mostly due to changes in Earth\u2019s orbital obliquity and are approximately symmetrical with regard to the hemispheres. The changes due to obliquity determine how much insolation reaches the poles versus the tropics. Precession on the other hand affects the seasonal distribution of solar energy, so as you can see, the end of the last glacial period at the beginning of the Holocene 11,700 years ago was when obliquity and precession were maximal in the Northern Hemisphere. Maximal precession means the difference in the Northern Hemisphere summer and winter was maximal, the total insolation by latitude remains about the same. Maximal obliquity means both poles receive the maximum insolation they will get, at the expense of the tropics.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Other interesting things to note in the lower part of figure 4 are that insolation barely changes throughout the Holocene in the tropics but changes a lot at the poles. The N-JJA (precession) curve looks a lot like the Makassar Strait and Greenland proxies in figure 1, notice the Holocene Climatic Optimum and Neoglacial labels in both figures 4 and 1.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Figure 5 shows the full Vinther and Rosenthal curves and relates them to historical events. Click on the figure or&nbsp;<a href=\"https:\/\/i0.wp.com\/andymaypetrophysicist.com\/wp-content\/uploads\/2021\/06\/younger_dryas_to_present_time_line-1.jpg?ssl=1\">here<\/a>&nbsp;to see at full resolution.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"541\" data-attachment-id=\"425100\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425100\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?fit=4001%2C2993&amp;ssl=1\" data-orig-size=\"4001,2993\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0younger_dryas_to_present_time_line-1\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?fit=723%2C541&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=723%2C541&#038;ssl=1\" alt=\"Graph showing Greenland temperatures and human civilization over the last 15,000 years, including notable climate events and sea level changes.\" class=\"wp-image-425100\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=1024%2C766&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=300%2C224&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=768%2C575&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=1536%2C1149&amp;ssl=1 1536w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=2048%2C1532&amp;ssl=1 2048w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=640%2C479&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=400%2C300&amp;ssl=1 400w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=200%2C150&amp;ssl=1 200w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?resize=1200%2C898&amp;ssl=1 1200w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?w=1446&amp;ssl=1 1446w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0younger_dryas_to_present_time_line-1.webp?w=2169&amp;ssl=1 2169w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Figure 5. Vinther Greenland reconstruction (middle) and Rosenthal Makassar Strait reconstruction (top) compared to historical events. Click on the figure to see at full resolution. Source: Figure 3\u00a0<a href=\"https:\/\/andymaypetrophysicist.com\/2021\/06\/23\/how-to-compare-today-to-the-past\/\">here<\/a>.<\/figcaption><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">There are a large number of historical references in the timeline shown in Figure 5 and we will not explain all of them here, they are well documented in earlier posts&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2015\/11\/26\/climate-and-human-civilization-over-the-last-18000-years-updated\/\">here<\/a>&nbsp;and&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2024\/12\/02\/climate-change-over-the-past-4000-years\/\">here<\/a>. We will just make the point that significant local climate changes are historical events that are often described in detail by the historians of the time and dated precisely. These historical descriptions can be more valuable than biological or ice core proxies.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">As figure 4 shows, the Arctic received the maximum insolation at the beginning of the Holocene 9,700BC (Walker et al., 2009). This was also the time of the fastest change in Arctic temperature during the Holocene. Around 9,700BC Severinghaus et al. documented a 5-10\u00b0C warming event that took only a few decades, dwarfing the warming rate we observe today. The warming event is identified in the middle plot in figure 5. This warming event is so significant it is part of the official geological basis for the beginning of the Holocene Epoch (Walker et al., 2009).<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The top plot in figure 5 shows the temperature of the 500-meter water in the Makassar Strait, which is representative of the North Pacific SST (Rosenthal et al., 2013). The present-day temperature in the Makassar Strait from the University of Hamburg (Gouretski, 2019) ocean temperature database is shown on this plot as a red box, it is well below the temperatures seen in the Medieval Warm Period (MWP) and the Roman Warm Period (RWP). In the middle plot of figure 5, the Vinther reconstruction (Vinther et al., 2009) is the orange line. The earlier blue line is the Alley reconstruction (Alley, 2000) spliced to it. The HadCRUT5 Greenland temperature average from 2000-2020 is plotted as a red box for comparison to the proxy temperature. The modern temperature in Greenland is roughly the same as the MWP temperature.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Discussion<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">There is considerable evidence that modern Arctic and Northern Hemisphere temperatures are well below the temperatures of 6,800-7,800 years ago. There is also a lot of evidence that the rate of temperature increase in 9,700BC was much faster than the increase we observe today. Comparing the rate of warming today when we have daily temperatures from all over the world to pre-industrial proxies is problematic. The high-quality Rosenthal and Vinther proxies have a resolution of about 20-years over the past 2000 years, so the modern averages that we compare them to in figure 5 cover 11 years (U of Hamburg) and 21 years (Greenland). It is much easier to reduce modern resolution for comparisons to the past than to try and increase proxy resolution. It is foolish to try and reconstruct global or hemispheric temperature records with proxies; they are very coarse and the averaging process used to make the reconstructions destroys the critical detail needed to determine a rate of warming.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Besides the rapid warming seen in these proxies around 9,700BC, there was also rapid warming around 6200BC, 40BC, and 800AD. Any of these periods could have warmed faster than today if they could be compared with the same coverage and accuracy.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Works Cited<\/h1>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Alley, R. B. (2000). The Younger Dryas cold interval as viewed from Central Greenland.&nbsp;<em>Quaternary Science Reviews, 19<\/em>, 213-226. Retrieved from <a href=\"http:\/\/klimarealistene.com\/web-content\/Bibliografi\/Alley2000%20The%20Younger%20Dryas%20cold%20interval%20as%20viewed%20from%20central%20Greenland%20QSR.pdf\" rel=\"nofollow\">http:\/\/klimarealistene.com\/web-content\/Bibliografi\/Alley2000%20The%20Younger%20Dryas%20cold%20interval%20as%20viewed%20from%20central%20Greenland%20QSR.pdf<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Briffa, K., Schweingruber, F., Jones, P., Osborn, T., &amp; Vaganov, E. (1998b). Reduced Sensitivity of recent tree-growth to temperature at high latitudes.&nbsp;<em>Nature<\/em>, 678-682. Retrieved from <a href=\"https:\/\/www.nature.com\/articles\/35596\" rel=\"nofollow\">https:\/\/www.nature.com\/articles\/35596<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Gouretski, V. (2019). A New Global Ocean Hydrographic Climatology.&nbsp;<em>Atmospheric and Oceanic Science Letters, 12<\/em>(3), 226-229. Retrieved from <a href=\"https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/16742834.2019.1588066\" rel=\"nofollow\">https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/16742834.2019.1588066<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Haigh, J. (2011).&nbsp;<em>Solar Influences on Climate.<\/em>&nbsp;Imperial College, London. Retrieved from <a href=\"https:\/\/www.imperial.ac.uk\/media\/imperial-college\/grantham-institute\/public\/publications\/briefing-papers\/Solar-Influences-on-Climate\u2014Grantham-BP-5.pdf\" rel=\"nofollow\">https:\/\/www.imperial.ac.uk\/media\/imperial-college\/grantham-institute\/public\/publications\/briefing-papers\/Solar-Influences-on-Climate\u2014Grantham-BP-5.pdf<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Kaufman, D. S., Schneider, D. P., McKay, N. P., Ammann, C. M., Bradley, R. S., Briffa, K. R., . . . Vinther, B. M. (2009). Recent Warming Reverses Long-Term Arctic Cooling.&nbsp;<em>Science, 325<\/em>(5945). <a href=\"https:\/\/doi.org\/10.1126\/science.1173983\" rel=\"nofollow\">https:\/\/doi.org\/10.1126\/science.1173983<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Lecavalier, B., Fisher, D., G.A. Milne, B., Vinther, L., Tarasov, P., Huybrechts, D., . . . Dyke, A. (2017). High Arctic Holocene temperature record from the Agassiz ice cap and Greenland ice sheet evolution.&nbsp;<em>Proc. Natl. Acad. Sci. , 114<\/em>(23), 5952-5957. <a href=\"https:\/\/doi.org\/10.1073\/pnas.1616287114\" rel=\"nofollow\">https:\/\/doi.org\/10.1073\/pnas.1616287114<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">McIntyre, S. (2011, Dec. 1).&nbsp;<em>Hide-the-Decline Plus<\/em>. Retrieved from Climate Audit: <a href=\"https:\/\/climateaudit.org\/2011\/12\/01\/hide-the-decline-plus\/\" rel=\"nofollow\">https:\/\/climateaudit.org\/2011\/12\/01\/hide-the-decline-plus\/<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">McIntyre, S. (2014, September 6).&nbsp;<em>The Original Hide-the-Decline<\/em>. Retrieved from Climate Audit: <a href=\"https:\/\/climateaudit.org\/2014\/09\/06\/the-original-hide-the-decline\/\" rel=\"nofollow\">https:\/\/climateaudit.org\/2014\/09\/06\/the-original-hide-the-decline\/<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Rosenthal, Y., Linsley, B., &amp; Oppo, D. (2013, November 1). Pacific Ocean Heat Content During the Past 10,000 years.&nbsp;<em>Science<\/em>. Retrieved from <a href=\"http:\/\/science.sciencemag.org\/content\/342\/6158\/617\" rel=\"nofollow\">http:\/\/science.sciencemag.org\/content\/342\/6158\/617<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Vin\u00f3s, J. (2017, April 30).&nbsp;<em>Nature Unbound III: Holocene climate variability (Part A)<\/em>. Retrieved from Climate Etc.: <a href=\"https:\/\/judithcurry.com\/2017\/04\/30\/nature-unbound-iii-holocene-climate-variability-part-a\/\" rel=\"nofollow\">https:\/\/judithcurry.com\/2017\/04\/30\/nature-unbound-iii-holocene-climate-variability-part-a\/<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Vinther, B., Buchardt, S., Clausen, H., Dahl-Jensen, Johnsen, Fisher, . . . Svensson. (2009, September). Holocene thinning of the Greenland ice sheet.&nbsp;<em>Nature, 461<\/em>. Retrieved from <a href=\"https:\/\/www.nature.com\/articles\/nature08355\" rel=\"nofollow\">https:\/\/www.nature.com\/articles\/nature08355<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Walker, M., Johnsen, S., Rasmussen, U. O., Popp, T., Steffensen, J.-P., Gibbard, P., . . . Newnham, R. (2009). Formal de\ufb01nition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core,and selected auxiliary records.&nbsp;<em>Journal Of Quaternary Science, 24<\/em>, 3-17. <a href=\"https:\/\/doi.org\/10.1002\/jqs.1227\" rel=\"nofollow\">https:\/\/doi.org\/10.1002\/jqs.1227<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"687\" height=\"1024\" data-attachment-id=\"425104\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=425104\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?fit=784%2C1168&amp;ssl=1\" data-orig-size=\"784,1168\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0 Holocene Warming\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?fit=687%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?resize=687%2C1024&#038;ssl=1\" alt=\"Graph showing Holocene warming trends over the past 9,000 years, highlighting temperature anomalies and significant intervals such as the Holocene Warm Interval and Mid-Holocene thermal maximum.\" class=\"wp-image-425104\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?resize=687%2C1024&amp;ssl=1 687w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?resize=201%2C300&amp;ssl=1 201w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?resize=768%2C1144&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?resize=640%2C953&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0-Holocene-Warming-1.jpg?w=784&amp;ssl=1 784w\" sizes=\"auto, (max-width: 687px) 100vw, 687px\" \/><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u201cair temperatures in the [Arctic or globally] are now at their warmest in the past 6,800\u20137,800 y, and that the recent rate of temperature change is unprecedented over the entire Holocene.\u201d (Lecavalier et al., 2017)<\/p>\n","protected":false},"author":121246920,"featured_media":425106,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":true,"token":"eyJpbWciOiJodHRwczpcL1wvaTAud3AuY29tXC9jbGltYXRlLXNjaWVuY2UucHJlc3NcL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjZcLzAyXC8wU2NyZWVuc2hvdC0yMDI2LTAyLTA3LTE1MTMxOS5wbmc_Zml0PTcyMyUyQzM5MyZzc2w9MSIsInR4dCI6IkhvbG9jZW5lIFdhcm1pbmciLCJ0ZW1wbGF0ZSI6ImhpZ2h3YXkiLCJmb250IjoiIiwiYmxvZ19pZCI6MTU1ODEyNDQ5fQ.Er3D2Wo1qafZqsZFots5OcUXTJNvzQzoywckJwL_CKYMQ"},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691818162,691829997,691841245,691834380,691832844,691820888,691831099,691822276],"class_list":["post-425089","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-arctic-warming","tag-carbon-dioxide-co","tag-earths-orbital-cycles","tag-holocene-climatic-optimum","tag-holocene-thermal-maximum","tag-milankovitch-cycles","tag-paleoclimatology","tag-sea-surface-temperature-sst","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0Screenshot-2026-02-07-151319.png?fit=1511%2C821&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1MAh","jetpack-related-posts":[{"id":324615,"url":"https:\/\/climatescience.press\/?p=324615","url_meta":{"origin":425089,"position":0},"title":"Nature Publication: Researchers Find Arctic Region 10,000 Years Ago Warmer Than Today","author":"uwe.roland.gross","date":"04\/29\/2024","format":false,"excerpt":"Examined today is a paper appearing in the journal Nature Communications titled: \u201cSeasonal sea-ice in the Arctic\u2019s last ice area during the Early Holocene\u201d The authors looked at sea ice in the region of the Lincoln Sea, bordering northern Greenland and Canada, will be the final stronghold of perennial Arctic\u2026","rel":"","context":"In \"Arctic\"","block_context":{"text":"Arctic","link":"https:\/\/climatescience.press\/?tag=arctic"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0Melting_Sea_Ice.JPG_9iZp5pr.jpg?fit=1200%2C796&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0Melting_Sea_Ice.JPG_9iZp5pr.jpg?fit=1200%2C796&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0Melting_Sea_Ice.JPG_9iZp5pr.jpg?fit=1200%2C796&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0Melting_Sea_Ice.JPG_9iZp5pr.jpg?fit=1200%2C796&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0Melting_Sea_Ice.JPG_9iZp5pr.jpg?fit=1200%2C796&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":387689,"url":"https:\/\/climatescience.press\/?p=387689","url_meta":{"origin":425089,"position":1},"title":"New Study: The Arctic Was 9\u00b0C Warmer Than Today During The Holocene Thermal Maximum","author":"uwe.roland.gross","date":"07\/09\/2025","format":false,"excerpt":"Holocene (11,700 to 8,200 years ago) Arctic (Svalbard) temperatures \u201cwere up to 9\u00b0C higher than today\u201d according to the authors of a\u00a0new\u00a0Nature\u00a0journal study. At that time CO2 was thought to only hover around 260 ppm.","rel":"","context":"In \"Arctic\"","block_context":{"text":"Arctic","link":"https:\/\/climatescience.press\/?tag=arctic"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQMcRLd2Kk4Jh0iE7fNP3obsf-5tR9k5fVcJANmyS0v_l4UsMkrpljtXMMH9QGQ0XC4lEYVH02dSASIRTspYwZ2GFSRYa5qkzCW-Dy1IGaLxPsjL7NzdZrdXecJCsKk-N6Z10LH-LnRaS7w7jxDwRJM70cvYJA-1.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQMcRLd2Kk4Jh0iE7fNP3obsf-5tR9k5fVcJANmyS0v_l4UsMkrpljtXMMH9QGQ0XC4lEYVH02dSASIRTspYwZ2GFSRYa5qkzCW-Dy1IGaLxPsjL7NzdZrdXecJCsKk-N6Z10LH-LnRaS7w7jxDwRJM70cvYJA-1.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQMcRLd2Kk4Jh0iE7fNP3obsf-5tR9k5fVcJANmyS0v_l4UsMkrpljtXMMH9QGQ0XC4lEYVH02dSASIRTspYwZ2GFSRYa5qkzCW-Dy1IGaLxPsjL7NzdZrdXecJCsKk-N6Z10LH-LnRaS7w7jxDwRJM70cvYJA-1.jpeg?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQMcRLd2Kk4Jh0iE7fNP3obsf-5tR9k5fVcJANmyS0v_l4UsMkrpljtXMMH9QGQ0XC4lEYVH02dSASIRTspYwZ2GFSRYa5qkzCW-Dy1IGaLxPsjL7NzdZrdXecJCsKk-N6Z10LH-LnRaS7w7jxDwRJM70cvYJA-1.jpeg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQMcRLd2Kk4Jh0iE7fNP3obsf-5tR9k5fVcJANmyS0v_l4UsMkrpljtXMMH9QGQ0XC4lEYVH02dSASIRTspYwZ2GFSRYa5qkzCW-Dy1IGaLxPsjL7NzdZrdXecJCsKk-N6Z10LH-LnRaS7w7jxDwRJM70cvYJA-1.jpeg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":327837,"url":"https:\/\/climatescience.press\/?p=327837","url_meta":{"origin":425089,"position":2},"title":"DNA Evidence Reveals Domestic Cats, Dogs, African Wildcats, Frogs Lived In The Arctic 9000 Years Ago","author":"uwe.roland.gross","date":"05\/11\/2024","format":false,"excerpt":"A new study finds warmth-demanding species could survive in the Holocene Arctic (northern Norway) hundreds to thousands of km north of where they reside today. This affirms temperatures were \u201chigher than today\u201d with much less snow and ice back then.","rel":"","context":"In \"260 ppm\"","block_context":{"text":"260 ppm","link":"https:\/\/climatescience.press\/?tag=260-ppm"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/05\/0newearthmapday.jpg?fit=1200%2C599&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/05\/0newearthmapday.jpg?fit=1200%2C599&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/05\/0newearthmapday.jpg?fit=1200%2C599&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/05\/0newearthmapday.jpg?fit=1200%2C599&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/05\/0newearthmapday.jpg?fit=1200%2C599&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":404332,"url":"https:\/\/climatescience.press\/?p=404332","url_meta":{"origin":425089,"position":3},"title":"New Study: Modern Warmth Is Merely Part Of A Natural Cycle","author":"uwe.roland.gross","date":"09\/23\/2025","format":false,"excerpt":"Throughout the last 10,000 years there have globally been much warmer and more extensive iceless periods than observed in the modern era.","rel":"","context":"In \"Climate change\"","block_context":{"text":"Climate change","link":"https:\/\/climatescience.press\/?tag=climate-change"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQPgrn3ZxLw-CC_stfvn7rJ47kfQxsjoV7PqjmMBp8bsFPEV6Vo0YWnQM5FkNZu9fKhNAdxluHF5h4eTZOw_Cp8py10ce6c03OUVI0zvCqEossoYJmBU9gdMdGWS1KxORMrLSrQz1LqWL-T2W5A9zR-luiNHaA.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQPgrn3ZxLw-CC_stfvn7rJ47kfQxsjoV7PqjmMBp8bsFPEV6Vo0YWnQM5FkNZu9fKhNAdxluHF5h4eTZOw_Cp8py10ce6c03OUVI0zvCqEossoYJmBU9gdMdGWS1KxORMrLSrQz1LqWL-T2W5A9zR-luiNHaA.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQPgrn3ZxLw-CC_stfvn7rJ47kfQxsjoV7PqjmMBp8bsFPEV6Vo0YWnQM5FkNZu9fKhNAdxluHF5h4eTZOw_Cp8py10ce6c03OUVI0zvCqEossoYJmBU9gdMdGWS1KxORMrLSrQz1LqWL-T2W5A9zR-luiNHaA.jpeg?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQPgrn3ZxLw-CC_stfvn7rJ47kfQxsjoV7PqjmMBp8bsFPEV6Vo0YWnQM5FkNZu9fKhNAdxluHF5h4eTZOw_Cp8py10ce6c03OUVI0zvCqEossoYJmBU9gdMdGWS1KxORMrLSrQz1LqWL-T2W5A9zR-luiNHaA.jpeg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQPgrn3ZxLw-CC_stfvn7rJ47kfQxsjoV7PqjmMBp8bsFPEV6Vo0YWnQM5FkNZu9fKhNAdxluHF5h4eTZOw_Cp8py10ce6c03OUVI0zvCqEossoYJmBU9gdMdGWS1KxORMrLSrQz1LqWL-T2W5A9zR-luiNHaA.jpeg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":404632,"url":"https:\/\/climatescience.press\/?p=404632","url_meta":{"origin":425089,"position":4},"title":"No Right to Stable Climate in Our Holocene\u00a0Epoch","author":"uwe.roland.gross","date":"09\/24\/2025","format":false,"excerpt":"Cyclical climate change is characteristic of the Holocene, with successive warmings and coolings. A solar forcing mechanism has steered Holocene climate change, expressed by 9 cooling phases known as Bond events. There is reliable geological evidence that the temperatures of most warming phases in the Holocene were globally higher or\u2026","rel":"","context":"In \"Arctic sea ice\"","block_context":{"text":"Arctic sea ice","link":"https:\/\/climatescience.press\/?tag=arctic-sea-ice"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQM_4IEJDoTdmg7i9iPFkOWX1W2HgqOuEOZ5jwuTKd7LPsAg_cvVcw5t7PBqk-7FsvzYtCeZspWNl7Ugw9TGO2rU1Je_naaC0huyxobeGFUCraPvcPZfhlY2pXROL32tPK3Gbc4iVBYMd24SgwgIQz0cMQ8hNg.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQM_4IEJDoTdmg7i9iPFkOWX1W2HgqOuEOZ5jwuTKd7LPsAg_cvVcw5t7PBqk-7FsvzYtCeZspWNl7Ugw9TGO2rU1Je_naaC0huyxobeGFUCraPvcPZfhlY2pXROL32tPK3Gbc4iVBYMd24SgwgIQz0cMQ8hNg.jpeg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQM_4IEJDoTdmg7i9iPFkOWX1W2HgqOuEOZ5jwuTKd7LPsAg_cvVcw5t7PBqk-7FsvzYtCeZspWNl7Ugw9TGO2rU1Je_naaC0huyxobeGFUCraPvcPZfhlY2pXROL32tPK3Gbc4iVBYMd24SgwgIQz0cMQ8hNg.jpeg?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQM_4IEJDoTdmg7i9iPFkOWX1W2HgqOuEOZ5jwuTKd7LPsAg_cvVcw5t7PBqk-7FsvzYtCeZspWNl7Ugw9TGO2rU1Je_naaC0huyxobeGFUCraPvcPZfhlY2pXROL32tPK3Gbc4iVBYMd24SgwgIQz0cMQ8hNg.jpeg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/09\/AQM_4IEJDoTdmg7i9iPFkOWX1W2HgqOuEOZ5jwuTKd7LPsAg_cvVcw5t7PBqk-7FsvzYtCeZspWNl7Ugw9TGO2rU1Je_naaC0huyxobeGFUCraPvcPZfhlY2pXROL32tPK3Gbc4iVBYMd24SgwgIQz0cMQ8hNg.jpeg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":245655,"url":"https:\/\/climatescience.press\/?p=245655","url_meta":{"origin":425089,"position":5},"title":"The Holocene Temperature Conundrum","author":"uwe.roland.gross","date":"02\/26\/2023","format":false,"excerpt":"Climate models are clearly not modeling natural climate change accurately, especially not orbital forcing. If you cannot model natural climate change, you have no idea what the human influence on climate is.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-823.png?fit=1200%2C630&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-823.png?fit=1200%2C630&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-823.png?fit=1200%2C630&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-823.png?fit=1200%2C630&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-823.png?fit=1200%2C630&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/425089","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/users\/121246920"}],"replies":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=425089"}],"version-history":[{"count":12,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/425089\/revisions"}],"predecessor-version":[{"id":425109,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/425089\/revisions\/425109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/425106"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=425089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=425089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=425089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}