{"id":1234,"date":"2021-05-02T20:53:19","date_gmt":"2021-05-02T18:53:19","guid":{"rendered":"https:\/\/davidbolius.at\/2-000-jahre-klimageschichte-des-co2\/"},"modified":"2021-05-20T20:15:08","modified_gmt":"2021-05-20T18:15:08","slug":"2-000-jahre-klimageschichte-des-co2","status":"publish","type":"post","link":"https:\/\/davidbolius.at\/en\/blog\/2021\/05\/02\/2-000-jahre-klimageschichte-des-co2\/","title":{"rendered":"2.000 years of climate history of CO2"},"content":{"rendered":"\n<p>If one looks at changes of the concentration of CO<sub>2<\/sub> in the atmosphere during the last 2000 years, one thing is particularly striking: The amount of CO<sub>2<\/sub> was relatively constant for a long time and it was around 280 ppm.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/davidbolius.at\/wp-content\/uploads\/2021\/05\/CO2-2000-Jahre-Klimageschichte.jpg\" alt=\"\" class=\"wp-image-1157\" width=\"594\" height=\"563\" srcset=\"https:\/\/davidbolius.at\/wp-content\/uploads\/2021\/05\/CO2-2000-Jahre-Klimageschichte.jpg 792w, https:\/\/davidbolius.at\/wp-content\/uploads\/2021\/05\/CO2-2000-Jahre-Klimageschichte-317x300.jpg 317w, https:\/\/davidbolius.at\/wp-content\/uploads\/2021\/05\/CO2-2000-Jahre-Klimageschichte-768x727.jpg 768w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><figcaption>Data is from Antarctica ice cores, see references<\/figcaption><\/figure><\/div>\n\n\n\n<p>After the year 1000 AD, a phase of slightly increased values \u200b\u200bbegins. This phase coincides with the so-called medieval warm period. You can also see that after 1600 AD the values \u200b\u200bare lower than on average. This phase coincides with one of the little ice ages.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CO<sub>2<\/sub> increase after 1850 AD<\/h2>\n\n\n\n<p>The really big change began after 1850. It was by then that an unprecedented rise in CO2 in the atmosphere started. The value of approx. 280 ppm that had been an absolute maximum for hundreds of thousands of years was clearly exceeded. <\/p>\n\n\n\n<p>It is the era when the industrialization began. At the same time, the increasingly and massive burning of fossil fuels began. First, the burning of coal (steam engine) was dominant, later crude oil and natural gas were increasingly burned.<\/p>\n\n\n\n<p>Most of the increase did not take place in the 19th, but in the 20<sup>th<\/sup> and in the 21<sup>st<\/sup> centuries. Around 1900 the CO<sub>2<\/sub> was just under 300 ppm. Within 120 years the value increased to 420 ppm (2021).<\/p>\n\n\n\n<p>So humans have massively intervened in the atmosphere since the beginning of industrialization. This changed the atmosphere in an unprecedented way nothing even close to this increase could be seen in the past 800,000 years (see also: <a href=\"https:\/\/davidbolius.at\/en\/800-000-years-of-co2-climate-history\/\">https:\/\/davidbolius.at\/en\/800-000-years-of-co2-climate-history\/<\/a> ).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">References:<\/h3>\n\n\n\n<p>Online_Resource: http:\/\/ncdc.noaa.gov\/paleo\/study\/17975<br>Original_Source_URL: ftp:\/\/ftp.ncdc.noaa.gov\/pub\/data\/paleo\/icecore\/antarctica\/antarctica2015co2composite.txt<br>Study_Name: Antarctic Ice Cores Revised 800KYr CO2 Data<br>Investigators: Bereiter, B.; Eggleston, S.; Schmitt, J.; Nehrbass-Ahles, C.; Stocker, T.F.; Fischer, H.; Kipfstuhl, S.; Chappellaz, J.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If one looks at changes of the concentration of CO2 in the atmosphere during the last 2000 years, one thing is particularly striking: The amount of CO2 was relatively constant&hellip;<\/p>\n","protected":false},"author":2,"featured_media":1157,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-1234","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate-change"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - 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