{"id":53,"date":"1938-01-01T04:35:14","date_gmt":"1938-01-01T04:35:14","guid":{"rendered":"http:\/\/climatechronology.com\/?p=53"},"modified":"1938-01-01T04:35:14","modified_gmt":"1938-01-01T04:35:14","slug":"callendar","status":"publish","type":"post","link":"https:\/\/umaine.edu\/climatechronology\/1938\/01\/01\/callendar\/","title":{"rendered":"Emissions Estimation"},"content":{"rendered":"<p class=\"listing-year\">1938<\/p>\n<p class=\"science-red\">English engineer and amateur meteorologist Guy Callendar concludes that humans have added about 150,000 million tonnes of CO<sub>2<\/sub> to the air over the previous 50 years<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-601 size-full\" src=\"https:\/\/umaine.edu\/climatechronology\/wp-content\/uploads\/sites\/575\/2016\/12\/cat_science-fuschia_helvneue.jpg\" alt=\"\" width=\"162\" height=\"40\" srcset=\"https:\/\/umaine.edu\/climatechronology\/wp-content\/uploads\/sites\/575\/2016\/12\/cat_science-fuschia_helvneue.jpg 162w, https:\/\/umaine.edu\/climatechronology\/wp-content\/uploads\/sites\/575\/2016\/12\/cat_science-fuschia_helvneue-105x26.jpg 105w\" sizes=\"auto, (max-width: 162px) 100vw, 162px\" \/><\/p>\n<p class=\"post-body\">\u201cThe artificial production of carbon dioxide and its influence on temperature,\u201d a paper by Guy Callendar appearing in the <em>Quarterly Journal of the Royal Meteorological Society,<\/em> concludes that \u201cby fuel combustion man has added about 150,000 million tons [tonnes] of carbon dioxide to the air over the past 50 years,\u201d and estimates that approximately three quarters of that has remained in the atmosphere. Callendar concludes that this increase in carbon dioxide has caused an increase in mean global temperatures during the previous half-century: \u201cFrom this the increase in mean temperature, due to the artificial production of carbon dioxide, is estimated to be at the rate of 0.003<sup>o<\/sup>C per year at the present time.\u201d<sup>*<\/sup> As physicist and historian of science Spencer Weart notes:\u00a0\u201cAs for the future, Callendar estimated, on flimsy grounds, that a doubling of CO<sub>2 <\/sub>could gradually bring a 2<sup>o<\/sup>C rise in future centuries.\u00a0Aware that industrial emissions were already far greater than in Arrhenius\u2019s day, Callendar saw this warming as a matter of present interest\u2026.Callendar\u2019s publications attracted some attention, and climatology textbooks of the 1940s and 1950s routinely included a brief reference to his studies. But most meteorologists gave Callendar\u2019s idea scant credence.\u201d<sup>**<\/sup><\/p>\n<p class=\"footnote-body\"><sup>*<\/sup>G.S. Callendar, \u201cThe artificial production of carbon dioxide and its influence on temperature,\u201d<em>Quarterly Journal of the Royal Meteorological Society, <\/em>Vol. 64, Issue 275, April, 1938, <a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/qj.49706427503\/abstract\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/qj.49706427503\/abstract<\/a><br \/>\n<sup>**<\/sup>Spencer Weart, The Discovery of Global Warming (Feb. 2016), <a href=\"http:\/\/history.aip.org\/climate\/simple.htm#L_M085\">http:\/\/history.aip.org\/climate\/simple.htm#L_M085<\/a><\/p>\n<p class=\"photo-credit\">Photo: <a href=\"https:\/\/en.wikipedia.org\/wiki\/File:GSCallendar1934.jpg\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/en.wikipedia.org\/wiki\/File:GSCallendar1934.jpg<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1938 English engineer and amateur meteorologist Guy Callendar concludes that humans have added about 150,000 million tonnes of CO2 to the air over the previous 50 years \u201cThe artificial production of carbon dioxide and its influence on temperature,\u201d a paper by Guy Callendar appearing in the Quarterly Journal of the Royal Meteorological Society, concludes that [&hellip;]<\/p>\n","protected":false},"author":1759,"featured_media":387,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[4,6],"tags":[23,25,34,40,66,73,81,165,167],"class_list":["post-53","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-20th-century","category-science","tag-callendar","tag-carbon-dioxide","tag-climate-change","tag-climate-science","tag-g-s-callendar","tag-global-temperature","tag-guy-callendar","tag-royal-meteorological-society","tag-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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