{"id":272925,"date":"2023-08-11T19:49:38","date_gmt":"2023-08-11T17:49:38","guid":{"rendered":"https:\/\/climatescience.press\/?p=272925"},"modified":"2023-08-11T19:49:41","modified_gmt":"2023-08-11T17:49:41","slug":"5-new-studies-indicate-there-has-been-no-net-warming-since-the-1700s","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=272925","title":{"rendered":"5 New Studies Indicate There Has Been No Net Warming Since The 1700s"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

<\/p>\n\n\n\n

From NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a>\u00a0on\u00a0<\/em>10. August 2023<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Proxy temperature records calibrated to closely align with current instrumental temperatures undermine the current \u201cglobal boiling\u201d narrative when extended to the 18th century.<\/strong><\/p>\n\n\n\n

Per a new study, maximum latewood density (MXD) tree-ring data have been observed to strongly correlate (r=0.77) with the modern (1959-2016) maximum (July-Aug.) instrumental temperature record (Li et al., 2023<\/a><\/strong>). In other words, MXD series from centuries-old trees can reliably record the warmest temperatures of the year when investigating the correspondence to measured thermometer temperatures.<\/p>\n\n\n\n

So it may be surprising to learn that when assessing the 1720-2018 temperatures by extending MXD data over the last 3 centuries, a non-warming (cooling) trend since 1900 emerges in the data from northwestern China, including a ~1\u00b0C warmer 1920s-\u201930s.<\/p>\n\n\n\n

The authors point out that these trends (\u201cnone of these MXD series showed a warming trend in the last century\u201d) have been observed in several other regions of the world, including eastern Asia, southern Europe, and northwestern Africa.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Li et al., 2023<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Both the instrumental (1900-2015) and proxy (1765-2002) temperature records closely agree that the Tierra del Fuego forested region \u2013 located at the southernmost tip of South America \u2013 has been cooling (net) since 1900 (instrumentals and proxies) and 1765 (proxies), respectively (Matskovsky et al., 2023<\/a><\/strong>).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Image Source:\u00a0Matskovsky et al., 2023<\/a><\/strong><\/p>\n\n\n\n

<\/p>\n\n\n\n

In 2007 the IPCC\u00a0relied upon a WWF claim<\/a><\/strong>\u00a0that said, due to warming, the Himalayan glaciers would very likely melt or \u201cdisappear\u201d by 2035 (or sooner).<\/p>\n\n\n\n

But a\u00a0new study<\/a><\/strong>\u00a0reconstructing 1733-2020 Nepal-Himalaya temperatures indicates there has been no net warming here in 288 years.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Gaire et al., 2023<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Another\u00a0new study<\/a><\/strong>\u00a0indicates the southeastern Tibetan Plateau was as-warm or warmer than recent decades in the 1870s and 1930s-\u201940s. Also, the warming and cooling oscillations over the last few hundred years correlate well with the naturally-varying AMO.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Li and Li, 2023<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Finally, a 1733-2010 minimum temperature reconstruction for south-central China reveals an oscillating trajectory, with no net warming throughout the nearly three centuries (Li et al., 2023<\/a><\/strong>). A recent warming trend is evident in the data, but only if the record begins in 1960, a particularly cold period of years.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Li et al., 2023<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Proxy temperature records calibrated to closely align with current instrumental temperatures undermine the current \u201cglobal boiling\u201d narrative when extended to the 18th century.<\/p>\n","protected":false},"author":121246920,"featured_media":272938,"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_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},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691818381,691821777,691821780,691821778,691821779,691821781,691821776],"class_list":{"0":"post-272925","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-ipcc","9":"tag-mxd-data","10":"tag-nepal-himalaya","11":"tag-south-central-china","12":"tag-southeastern-tibetan-plateau","13":"tag-tierra-del-fuego","14":"tag-tree-ring-data","16":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0nothing-to-see-here.png?fit=1279%2C695&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1901","jetpack-related-posts":[{"id":294083,"url":"https:\/\/climatescience.press\/?p=294083","url_meta":{"origin":272925,"position":0},"title":"How Scary Temperature Trends are Manufactured by Comparing \u201cApples to Oranges\u201d!","author":"uwe.roland.gross","date":"06\/01\/2024","format":false,"excerpt":"Sadly, alarmist scientists are comparing apples to oranges to manufacture unprecedented warming. 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