{"id":243289,"date":"2023-02-05T14:59:28","date_gmt":"2023-02-05T13:59:28","guid":{"rendered":"https:\/\/climatescience.press\/?p=243289"},"modified":"2023-02-05T14:59:34","modified_gmt":"2023-02-05T13:59:34","slug":"the-ipcc-ar6-report-erases-the-holocene","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=243289","title":{"rendered":"The IPCC AR6 Report Erases the Holocene"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"489\" data-attachment-id=\"243294\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243294\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?fit=910%2C616&amp;ssl=1\" data-orig-size=\"910,616\" 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-2-and-Featured\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?fit=723%2C489&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?resize=723%2C489&#038;ssl=1\" alt=\"\" class=\"wp-image-243294\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?w=910&amp;ssl=1 910w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?resize=300%2C203&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/0Figure-2-and-Featured.webp?resize=768%2C520&amp;ssl=1 768w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">From <a href=\"https:\/\/wattsupwiththat.com\/2023\/02\/04\/the-ipcc-ar6-report-erases-the-holocene\/?utm_source=rss&amp;utm_medium=rss&amp;utm_campaign=the-ipcc-ar6-report-erases-the-holocene\">Watts Up With That?<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>By Andy May<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You won\u2019t find much in the&nbsp;<a href=\"https:\/\/www.ipcc.ch\/assessment-report\/ar6\/\">IPCC AR6 report<\/a>&nbsp;on the atmospheric CO<sub>2<\/sub>&nbsp;concentration evolution during the&nbsp;<a href=\"https:\/\/www.britannica.com\/summary\/Holocene-Epoch\">Holocene<\/a>. They talk a lot about how CO<sub>2<\/sub>&nbsp;concentration compares to global temperature during the years since 1850 and over the past 800,000 years, but very little about the changes since 12,000 years ago. On page 44 of the Technical Summary, we see the figure shown below as Figure 1.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"491\" data-attachment-id=\"243291\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243291\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?fit=860%2C584&amp;ssl=1\" data-orig-size=\"860,584\" 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-176\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?fit=723%2C491&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?resize=723%2C491&#038;ssl=1\" alt=\"\" class=\"wp-image-243291\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?w=860&amp;ssl=1 860w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?resize=300%2C204&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-176.png?resize=768%2C522&amp;ssl=1 768w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 1. The correspondence of CO<sub>2<\/sub>\u00a0and temperature from the AR6 Technical Summary, page 44. The Holocene portion of the CO<sub>2<\/sub>\u00a0record used is circled and the subject of this post.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Figure 1 is designed to hide the relationship between CO<sub>2<\/sub>\u00a0and global atmospheric surface temperature (GAST), not illuminate it. It was designed to hide abundant, credible, and well-known evidence that through much of Earth\u2019s history CO<sub>2<\/sub>\u00a0concentration goes down as global temperatures go up. Figure 2 is from Javier Vinos\u2019 book (Vin\u00f3s, 2022, p. 145). It shows the data in a much clearer and more honest way.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"489\" data-attachment-id=\"243293\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243293\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?fit=910%2C616&amp;ssl=1\" data-orig-size=\"910,616\" 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-177\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?fit=723%2C489&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?resize=723%2C489&#038;ssl=1\" alt=\"\" class=\"wp-image-243293\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?w=910&amp;ssl=1 910w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?resize=300%2C203&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?resize=768%2C520&amp;ssl=1 768w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 2. Reconstructions of Cenozoic CO<sub>2<\/sub>\u00a0concentration (black line) and temperature (red line). Most of the time they move in opposite directions, which is the opposite of the implied relationship shown in Figure 1 from AR6. The temperature proxy shown in red is provided in \u201c\u03b4<sup>18<\/sup>O\u201d units, that is the fraction of oxygen 18 in the atmosphere, it is a function of atmospheric temperature. The \u03b4<sup>18<\/sup>O scale is on the right. Approximate surface temperature averages (GAST) are given on the right side of the plot. Today we are near the minimum for the past 65 million years. CO<sub>2<\/sub>\u00a0is given in ppm (parts per million) as shown on the left scale. Source: (Vin\u00f3s, 2022, p. 145).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The AR6 plot tries to imply that temperature follows CO<sub>2<\/sub>&nbsp;concentration and uses clever temporal scaling and cherry-picked data to make that point. Figure 2 shows all the data for the Cenozoic Period using one time scale, and shows the truth is the opposite. Usually, CO<sub>2<\/sub>&nbsp;and temperature move in opposite directions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The circled area in Figure 1 shows the CO<sub>2<\/sub>&nbsp;concentration increasing during the Holocene, as temperatures rise about five degrees from the last glacial maximum. This crams the entire Holocene into less than a millimeter. AR6 tells us that the \u201cintent of [Figure 1] is to show that CO<sub>2<\/sub>&nbsp;and temperature covary, both in the past and into the future\u2026\u201d But the truth of the relationship between them is cleverly hidden in Figure 1 by the design of the figure, the weird time scale, and the choice of the data used. It is not a scientific illustration meant to illuminate the truth; it is a clever bit of propaganda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Chapter 2 they plot\u00a0<a href=\"https:\/\/www.nature.com\/articles\/nature02599\/\">Dome C<\/a>\u00a0and\u00a0<a href=\"https:\/\/www.waisdivide.unh.edu\/\">WAIS Divide<\/a>\u00a0CO<sub>2<\/sub>\u00a0from 21,000 years ago to 10,000 years ago in a very small plot (AR6, page 301). It is shown in Figure 3.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"243296\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243296\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-178.png?fit=378%2C196&amp;ssl=1\" data-orig-size=\"378,196\" 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-178\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-178.png?fit=378%2C196&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-178.png?resize=508%2C263&#038;ssl=1\" alt=\"\" class=\"wp-image-243296\" width=\"508\" height=\"263\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-178.png?w=378&amp;ssl=1 378w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-178.png?resize=300%2C156&amp;ssl=1 300w\" sizes=\"auto, (max-width: 508px) 100vw, 508px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 3. Antarctic ice core CO<sub>2<\/sub>\u00a0concentration from AR6, page 301. Both the Dome C and WAIS (West Atlantic Ice Sheet) Divide data are shown, but the plot stops at 10,000 years before today, why? Data exists beyond that.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Why are they avoiding showing the CO<sub>2<\/sub>\/temperature relationship during the Holocene Epoch? They cram it into less than a millimeter in Figure 1 and chop it off in Figure 3. The Holocene is the last 12,000 years, the proxy data quality in that period should be high, relative to the rest of the Cenozoic. Let\u2019s look at other sources of Holocene CO<sub>2<\/sub>\u00a0data, like\u00a0<a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0012821X04003115\">Monnin, 2004<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"243298\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243298\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-179.png?fit=624%2C428&amp;ssl=1\" data-orig-size=\"624,428\" 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-179\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-179.png?fit=624%2C428&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-179.png?resize=723%2C496&#038;ssl=1\" alt=\"\" class=\"wp-image-243298\" width=\"723\" height=\"496\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-179.png?w=624&amp;ssl=1 624w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-179.png?resize=300%2C206&amp;ssl=1 300w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 4. Plot of CO<sub>2<\/sub>\u00a0(red line), CH<sub>4<\/sub>\u00a0(blue line), IPCC climate model calculated temperature (green line), and proxy temperature (as Z-score, black line) for the Holocene. The CO<sub>2<\/sub>\u00a0record shown is from Dome C in Antarctica. The methane (CH<sub>4<\/sub>) record shown is from Greenland (Kobashi, Severinghaus, Brook, Barnola, &amp; Grachev, 2007). Source: (Vin\u00f3s, 2022, p. 49).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As Figure 4 shows, CO<sub>2<\/sub>&nbsp;and CH<sub>4<\/sub>&nbsp;(methane) atmospheric concentrations have increased for the past 5,000 to 6,000 years as global proxy temperatures dropped. This is the opposite of IPCC\u2019s stated intent for showing Figure 1. The global proxy temperature curve shown in Figure 4 is from&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2017\/05\/31\/a-holocene-temperature-reconstruction-part-1-the-antarctic\/\">Marcott\u2019s proxies<\/a>&nbsp;but reinterpreted by Vin\u00f3s (Vin\u00f3s, 2022). Both the climate model temperatures and the CO<sub>2<\/sub>&nbsp;concentrations move opposite to the proxy temperatures for most of the Holocene Epoch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The CO<sub>2<\/sub>\u00a0concentration in Figure 4 is from Eric Monnin and eleven co-authors (Monnin, et al., 2004) in an\u00a0<a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0012821X04003115\">article<\/a>\u00a0in\u00a0<em>Earth and Planetary Science Letters<\/em>. Their Figure 1 is a plot of available Antarctic ice core CO<sub>2<\/sub>\u00a0proxies for the Holocene, it is shown as our Figure 5. In this plot the present is to the left and the beginning of the Holocene is to the right, just opposite of the previous figures.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"243299\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243299\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-180.png?fit=511%2C446&amp;ssl=1\" data-orig-size=\"511,446\" 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-180\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-180.png?fit=511%2C446&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-180.png?resize=723%2C631&#038;ssl=1\" alt=\"\" class=\"wp-image-243299\" width=\"723\" height=\"631\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-180.png?w=511&amp;ssl=1 511w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-180.png?resize=300%2C262&amp;ssl=1 300w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 5. \u00adPlots of CO<sub>2<\/sub>\u00a0from Antarctic ice core data. Squares: DML (Dronning Maud Land) data. Dots: Dome C data. Diamonds: Taylor Dome data on the new timescale by matching the CO<sub>2<\/sub>\u00a0records. Grey diamonds: Taylor Dome data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Dome C ice core shows the entire Holocene. It is plotted in Figure 6, oriented like Figures 1 to 3, with the present to the right.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"243301\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243301\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-181.png?fit=584%2C330&amp;ssl=1\" data-orig-size=\"584,330\" 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-181\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-181.png?fit=584%2C330&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-181.png?resize=723%2C408&#038;ssl=1\" alt=\"\" class=\"wp-image-243301\" width=\"723\" height=\"408\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-181.png?w=584&amp;ssl=1 584w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-181.png?resize=300%2C170&amp;ssl=1 300w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 6. NOAA\u2019s Dome C ice core CO<sub>2<\/sub>\u00a0data. Data from\u00a0<a href=\"https:\/\/www.ncei.noaa.gov\/access\/paleo-search\/?dataTypeId=7\">NOAA<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"505\" data-attachment-id=\"243303\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=243303\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?fit=884%2C618&amp;ssl=1\" data-orig-size=\"884,618\" 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-182\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?fit=723%2C505&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?resize=723%2C505&#038;ssl=1\" alt=\"\" class=\"wp-image-243303\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?w=884&amp;ssl=1 884w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?resize=300%2C210&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-182.png?resize=768%2C537&amp;ssl=1 768w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Figure 7. Three temperature reconstructions from different parts of the world. The reconstructed anomalies are all relative to the respective 7100BC to present averages. Sources: Antarctica, (Jouzel, et al., 2007), Indonesian Throughway, (Rosenthal, Linsley, &amp; Oppo, 2013), Greenland, (Vinther, et al., 2009).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Figure 7 shows that temperatures in the Northern Hemisphere decline over the past 5,000 to 6,000 years or longer, a period known as the \u201cNeoglacial.\u201d While&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2021\/03\/26\/best-climate-change-temperatures\/\">Rosenthal\u2019s reconstruction<\/a>&nbsp;is based upon 500-meter-deep ocean temperatures in the Indonesian Throughway between Borneo and Sulawesi, the water temperatures are thought to primarily represent ocean surface temperatures in the tropical and Northern Pacific Ocean. This makes some sense as they track Vinther\u2019s Greenland ice core temperatures fairly well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Antarctica dances to a different drummer. It moves opposite Northern Hemisphere temperatures during the&nbsp;<a href=\"https:\/\/andymaypetrophysicist.com\/2022\/08\/30\/are-fossil-fuel-co2-emissions-good-or-bad\/\">Holocene Climatic Optimum<\/a>&nbsp;(roughly 8000BC to 4500BC) and while Northern Hemisphere temperatures drop after 4,500BC, Antarctic temperatures are flat. After 5000BC CO<sub>2<\/sub>&nbsp;concentration&nbsp;<em>increases<\/em>, as shown in Figure 6.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Discussion<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Renee Hannon noticed the deceptive plot shown in Figure 1 and pointed it out in the comments to my post on&nbsp;<a href=\"https:\/\/wattsupwiththat.com\/2023\/02\/01\/tom-nelson-interviews-javier-vinos\/\">Javier\u2019s interview with Tom Nelson<\/a>. See her comment&nbsp;<a href=\"https:\/\/wattsupwiththat.com\/2023\/02\/01\/tom-nelson-interviews-javier-vinos\/#comment-3674675\">here<\/a>. The IPCC\u2019s&nbsp;<a href=\"https:\/\/www.ipcc.ch\/about\/#:~:text=Mission\">stated objective<\/a>&nbsp;is to \u201cprovide governments at all levels with scientific information that they can use to develop climate policies.\u201d Is cherry-picking data and creating deceptive illustrations \u201cscientific?\u201d Is ignoring and hiding valid, peer-reviewed, relevant data \u201cscientific?\u201d I think not.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I\u2019m reminded of a time I was researching an article for another publication and found that AR6 managed to discuss the famous Iris Effect (see\u00a0<a href=\"https:\/\/andymaypetrophysicist.com\/2021\/07\/04\/climate-sensitivity-to-co2-what-do-we-know-part-1\/\">here<\/a>, Lindzen and Choi section), discovered by Richard Lindzen, Ming-Dah Chou, and Arthur Hou in 2001 (Lindzen, Chou, &amp; Hou, 2001) and managed to do it without once mentioning any of them, check it yourself, see pages 972-973 in\u00a0<a href=\"https:\/\/www.ipcc.ch\/report\/ar6\/wg1\/chapter\/chapter-7\/\">Chapter 7<\/a>. They do mention Lindzen, et al., 2001 later in Chapter 7 in another context, so you will find the paper in the chapter bibliography. Cherry-picking, ignoring contrary data, \u201cforgetting\u201d to reference the discoverers of key concepts has risen to epic heights in this IPCC. I find it disgraceful.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Works Cited<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Jouzel, J., Masson-Delmotte, V., Cattani, O., Dreyfus, G., Falourd, S., &amp; Hoffmann, G. (2007). Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years.&nbsp;<em>Science, 317<\/em>, 793-796. doi:10.1126\/science.1141038<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kobashi, T., Severinghaus, J. P., Brook, E. J., Barnola, J.-M., &amp; Grachev, A. M. (2007). Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice,.&nbsp;<em>Quaternary Science Reviews, 26<\/em>(9-10), 1212-1222. doi:10.1016\/j.quascirev.2007.01.009<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lindzen, R., Chou, M.-D., &amp; Hou, A. (2001, March). Does the Earth have an Adaptive Iris.&nbsp;<em>Bulletin of the American Meteorological Society, 82<\/em>(3). Retrieved from <a href=\"https:\/\/journals.ametsoc.org\/view\/journals\/bams\/82\/3\/1520-0477_2001_082_0417_dtehaa_2_3_co_2.xml\" rel=\"nofollow\">https:\/\/journals.ametsoc.org\/view\/journals\/bams\/82\/3\/1520-0477_2001_082_0417_dtehaa_2_3_co_2.xml<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Monnin, E., Steig, E. J., Siegenthaler, U., Kawamura, K., Schwander, J., Stauffer, B., . . . Fischer, H. (2004). Evidence for substantial accumulation rate variability in Antarctica during the Holocene, through synchronization of CO<sub>2<\/sub>&nbsp;in the Taylor Dome, Dome C and DML ice cores.&nbsp;<em>Earth and Planetary Science Letters<\/em>, 45-54. doi:10.1016\/j.epsl.2004.05.007<\/p>\n\n\n\n<p class=\"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=\"wp-block-paragraph\">Vin\u00f3s, J. (2022).&nbsp;<em>Climate of the Past, Present and Future, A Scientific Debate, 2nd Edition.<\/em>&nbsp;Madrid: Critical Science Press. Retrieved from <a href=\"https:\/\/www.researchgate.net\/publication\/363669186_Climate_of_the_Past_Present_and_Future_A_scientific_debate_2nd_ed\" rel=\"nofollow\">https:\/\/www.researchgate.net\/publication\/363669186_Climate_of_the_Past_Present_and_Future_A_scientific_debate_2nd_ed<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vinther, B. M., Buchardt, S. L., Clausen, H. B., Dahl-Jensen, D., Johnsen, S. J., Fisher, D. A., . . . Svensson, A. M. (2009, September 17). Holocene thinning of the Greenland ice sheet.&nbsp;<em>Nature, 461<\/em>. Retrieved from <a href=\"http:\/\/users.clas.ufl.edu\/rrusso\/gly6932\/vinther_etal_nature09.pdf\" rel=\"nofollow\">http:\/\/users.clas.ufl.edu\/rrusso\/gly6932\/vinther_etal_nature09.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>You won\u2019t find much in the\u00a0IPCC AR6 report\u00a0on the atmospheric CO2\u00a0concentration evolution during the\u00a0Holocene. They talk a lot about how CO2\u00a0concentration compares to global temperature during the years since 1850 and over the past 800,000 years, but very little about the changes since 12,000 years ago.<\/p>\n","protected":false},"author":121246920,"featured_media":243293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":{"0":"post-243289","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","9":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/02\/image-177.png?fit=910%2C616&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-11i1","jetpack-related-posts":[{"id":385343,"url":"https:\/\/climatescience.press\/?p=385343","url_meta":{"origin":243289,"position":0},"title":"Scafetta: Climate Models Have\u00a0Issues","author":"uwe.roland.gross","date":"27\/06\/2025","format":false,"excerpt":"The Coupled Model Intercomparison Project (CMIP) global climate models\u00a0(GCMs) assess\u00a0that nearly\u00a0100% of global surface warming\u00a0observed\u00a0between 1850\u20131900 and 2011\u20132020 is attributable to\u00a0anthropogenic drivers like\u00a0greenhouse gas emissions.\u00a0These models\u00a0also generate future climate projections based on shared socioeconomic pathways (SSPs), aiding in risk assessment and the development of costly \u201cNet-Zero\u201d climate mitigation strategies.","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\/2023\/06\/0-CMIP6-climate-models.jpeg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0-CMIP6-climate-models.jpeg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0-CMIP6-climate-models.jpeg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0-CMIP6-climate-models.jpeg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0-CMIP6-climate-models.jpeg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":313921,"url":"https:\/\/climatescience.press\/?p=313921","url_meta":{"origin":243289,"position":1},"title":"Annotated Bibliography for Climate: The Movie","author":"uwe.roland.gross","date":"28\/03\/2024","format":false,"excerpt":"Many viewers of\u00a0Climate: The Movie\u00a0have asked for more information on the topics discussed.","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\/2024\/03\/0Screenshot-2024-03-28-075453.png?fit=1200%2C708&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/0Screenshot-2024-03-28-075453.png?fit=1200%2C708&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/0Screenshot-2024-03-28-075453.png?fit=1200%2C708&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/0Screenshot-2024-03-28-075453.png?fit=1200%2C708&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/0Screenshot-2024-03-28-075453.png?fit=1200%2C708&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":157025,"url":"https:\/\/climatescience.press\/?p=157025","url_meta":{"origin":243289,"position":2},"title":"Holocene Antarctic CO2 Variability or Lack Of","author":"uwe.roland.gross","date":"13\/08\/2021","format":false,"excerpt":"Guest Post by Renee Hannon\ufeff Introduction\ufeff This post examines CO2\u00a0ice core measurements from Antarctica during the Holocene Epoch. The key CO2\u00a0dataset for paleoclimate studies is the EPICA Dome C (EDC) data also known as Dome Charlie or Dome Concordia. Dome C is located on the eastern Antarctic Plateau, one of\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2021\/08\/0Figure-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2021\/08\/0Figure-3.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2021\/08\/0Figure-3.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2021\/08\/0Figure-3.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":305607,"url":"https:\/\/climatescience.press\/?p=305607","url_meta":{"origin":243289,"position":3},"title":"Climate Model Bias 2: Modeling Greenhouse Gases","author":"uwe.roland.gross","date":"02\/03\/2024","format":false,"excerpt":"Since the late 19th\u00a0century, with the work by Svante Arrhenius, climate models have been used to estimate the amount of global warming due to human greenhouse gas emissions.[1]\u00a0Due to the complexity of Earth\u2019s weather and climate, the connection between climate change\/global warming and greenhouse gases cannot be observed or measured,\u2026","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\/2024\/03\/00Featured-2-1.webp?fit=1200%2C714&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/00Featured-2-1.webp?fit=1200%2C714&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/00Featured-2-1.webp?fit=1200%2C714&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/00Featured-2-1.webp?fit=1200%2C714&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/03\/00Featured-2-1.webp?fit=1200%2C714&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":186222,"url":"https:\/\/climatescience.press\/?p=186222","url_meta":{"origin":243289,"position":4},"title":"Methane Causes Half of Global Warming\u2013IPCC","author":"uwe.roland.gross","date":"05\/02\/2022","format":false,"excerpt":"By Paul Homewood https:\/\/www.bbc.co.uk\/news\/science-environment-60203683 The BBC article on methane makes an interesting claim: An\u00a0IPCC study last year\u00a0suggested that 30-50% of the current rise in temperatures is down to methane. The study referred to is AR6, which estimates that increased levels of methane in the atmosphere have contributed 0.5C to global\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0image_thumb-25.png?fit=715%2C808&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0image_thumb-25.png?fit=715%2C808&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0image_thumb-25.png?fit=715%2C808&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0image_thumb-25.png?fit=715%2C808&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":186352,"url":"https:\/\/climatescience.press\/?p=186352","url_meta":{"origin":243289,"position":5},"title":"Methane Causes Half of Global Warming\u2013IPCC","author":"uwe.roland.gross","date":"06\/02\/2022","format":false,"excerpt":"From NOT A LOT OF PEOPLE KNOW THAT By Paul Homewood https:\/\/www.bbc.co.uk\/news\/science-environment-60203683 The BBC article on methane makes an interesting claim: An\u00a0IPCC study last year\u00a0suggested that 30-50% of the current rise in temperatures is down to methane. The study referred to is AR6, which estimates that increased levels of methane\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0133816210_m.jpg?fit=1024%2C512&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0133816210_m.jpg?fit=1024%2C512&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0133816210_m.jpg?fit=1024%2C512&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/02\/0133816210_m.jpg?fit=1024%2C512&ssl=1&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/243289","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=243289"}],"version-history":[{"count":8,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/243289\/revisions"}],"predecessor-version":[{"id":243305,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/243289\/revisions\/243305"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/243293"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=243289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=243289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=243289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}