{"id":32437,"date":"2024-03-05T15:28:39","date_gmt":"2024-03-05T15:28:39","guid":{"rendered":"https:\/\/edukemy.com\/blog\/?p=32437"},"modified":"2024-03-05T15:28:42","modified_gmt":"2024-03-05T15:28:42","slug":"climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes","status":"publish","type":"post","link":"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/","title":{"rendered":"Climate Sensitivity &#8211; Feedback Drive Uncertainty &#8211; UPSC Environment Notes"},"content":{"rendered":"\n\n\n<ul class=\"wp-block-list\"><li>Climate sensitivity is usually described as the increase in global temperature when the concentration of CO2 in the atmosphere doubles from pre-industrial levels.&nbsp;<\/li><li>Before industrialization, CO2 was around 260 parts per million (ppm), so doubling would be at approximately 520 ppm.&nbsp;<\/li><li>Presently, atmospheric CO2 has surpassed 400 ppm, and we anticipate reaching the 520 ppm threshold in the next 50-100 years based on future greenhouse gas emissions.<\/li><\/ul>\n\n\n\n<p>There are different ways to define climate sensitivity based on the timescales under consideration. Two key measures include:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Transient Climate Response (TCR):<\/strong><ul><li>Definition: TCR is the temperature increase at the moment when atmospheric CO2 has doubled, assuming an annual increase of 1%.<\/li><li>Significance: It provides insights into what we might expect over the current century, especially as atmospheric CO2 concentrations are actively changing during this period.<\/li><\/ul><\/li><li><strong>Equilibrium Climate Sensitivity (ECS):<\/strong><ul><li>Definition: ECS represents the temperature increase that occurs over an extended period (hundreds or even thousands of years) after the TCR point, allowing the climate system to fully adjust to a sustained doubling of CO2.<\/li><li>Significance: While TCR focuses on shorter timescales, ECS considers the long-term warming potential of the climate system. However, ECS may be less directly relevant to policy decisions regarding climate change due to its extended timescales.<\/li><\/ul><\/li><\/ul>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-69d8395e014f8\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69d8395e014f8\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#HOW_TO_ESTIMATE_CLIMATE_SENSITIVITY\" title=\"HOW TO ESTIMATE CLIMATE SENSITIVITY\">HOW TO ESTIMATE CLIMATE SENSITIVITY<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#Historical_Climate_Records\" title=\"Historical Climate Records:\">Historical Climate Records:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#Climate_Models\" title=\"Climate Models:\">Climate Models:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#Palaeoclimate_Records\" title=\"Palaeoclimate Records:\">Palaeoclimate Records:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#FAQs_%E2%80%93_CLIMATE_SENSITIVITY_AND_FEEDBACK_DRIVE_UNCERTAINTY\" title=\"FAQs &#8211; CLIMATE SENSITIVITY AND FEEDBACK DRIVE UNCERTAINTY\">FAQs &#8211; CLIMATE SENSITIVITY AND FEEDBACK DRIVE UNCERTAINTY<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#1_What_is_climate_sensitivity\" title=\"1. What is climate sensitivity?\">1. What is climate sensitivity?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#2_What_was_the_pre-industrial_CO2_concentration_and_when_is_it_expected_to_double\" title=\"2. What was the pre-industrial CO2 concentration, and when is it expected to double?\">2. What was the pre-industrial CO2 concentration, and when is it expected to double?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#3_What_are_the_key_measures_of_climate_sensitivity\" title=\"3. What are the key measures of climate sensitivity?\">3. What are the key measures of climate sensitivity?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#4_Why_is_TCR_significant\" title=\"4. Why is TCR significant?\">4. Why is TCR significant?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#5_What_is_the_significance_of_ECS\" title=\"5. What is the significance of ECS?\">5. What is the significance of ECS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#6_How_is_climate_sensitivity_estimated\" title=\"6. How is climate sensitivity estimated?\">6. How is climate sensitivity estimated?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#7_Why_cant_climate_sensitivity_be_directly_measured\" title=\"7. Why can&#8217;t climate sensitivity be directly measured?\">7. Why can&#8217;t climate sensitivity be directly measured?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#In_case_you_still_have_your_doubts_contact_us_on_9811333901\" title=\"In case you still have your doubts, contact us on 9811333901.&nbsp;\">In case you still have your doubts, contact us on 9811333901.&nbsp;<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/edukemy.com\/blog\/climate-sensitivity-feedback-drive-uncertainty-upsc-environment-notes\/#Visit_our_YouTube_Channel_%E2%80%93_here\" title=\"Visit our YouTube Channel &#8211;&nbsp;here\">Visit our YouTube Channel &#8211;&nbsp;here<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"HOW_TO_ESTIMATE_CLIMATE_SENSITIVITY\"><\/span><strong>HOW TO ESTIMATE CLIMATE SENSITIVITY<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Estimating climate sensitivity involves relying on indirect methods, as direct measurement is not possible. Three main approaches are used for estimation:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Historical_Climate_Records\"><\/span><strong>Historical Climate Records:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>Method: Analyzing instrumental records of warming since the mid-19th century, coupled with assessments of greenhouse gas and aerosol emissions.<\/li><li>Application: This approach helps evaluate the global temperature response to human-induced CO2 emissions up to the present.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Climate_Models\"><\/span><strong>Climate Models:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>Method: Utilizing climate models, sophisticated simulations of Earth&#8217;s climate system, to project future climate sensitivity.<\/li><li>Application: Since future climate observations are unavailable, these models provide predictions based on our understanding of the underlying physics governing the climate system.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Palaeoclimate_Records\"><\/span><strong>Palaeoclimate Records:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>Method: Examining records such as ice cores to estimate natural temperature and atmospheric CO2 variations over thousands of years.<\/li><li>Application: This method allows for estimates of the historical relationship between temperature and CO2 levels, providing insights into natural climate sensitivity changes.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_%E2%80%93_CLIMATE_SENSITIVITY_AND_FEEDBACK_DRIVE_UNCERTAINTY\"><\/span><strong>FAQs &#8211; CLIMATE SENSITIVITY AND FEEDBACK DRIVE UNCERTAINTY<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_What_is_climate_sensitivity\"><\/span>1. What is climate sensitivity?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Climate sensitivity refers to the increase in global temperature when the concentration of CO2 in the atmosphere doubles from pre-industrial levels, typically measured in degrees Celsius.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_What_was_the_pre-industrial_CO2_concentration_and_when_is_it_expected_to_double\"><\/span>2. What was the pre-industrial CO2 concentration, and when is it expected to double?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Pre-industrial CO2 was around 260 parts per million (ppm). Doubling would occur at approximately 520 ppm. With current levels exceeding 400 ppm, it is anticipated to reach 520 ppm in the next 50-100 years based on greenhouse gas emissions.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_What_are_the_key_measures_of_climate_sensitivity\"><\/span>3. What are the key measures of climate sensitivity?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Two main measures are:<ul><li>Transient Climate Response (TCR): The temperature increase when CO2 doubles, assuming a 1% annual increase.<\/li><li>Equilibrium Climate Sensitivity (ECS): The long-term temperature increase after the TCR point, occurring over hundreds or thousands of years.<\/li><\/ul><\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Why_is_TCR_significant\"><\/span>4. Why is TCR significant?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>TCR provides insights into temperature changes over the current century, aligning with actively changing atmospheric CO2 concentrations during this period.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_What_is_the_significance_of_ECS\"><\/span>5. What is the significance of ECS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>ECS considers the extended period for the climate system to fully adjust to sustained doubled CO2 levels, offering insights into long-term warming potential. However, it may be less directly relevant to short-term policy decisions.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_How_is_climate_sensitivity_estimated\"><\/span>6. How is climate sensitivity estimated?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Estimation involves three main approaches:<ul><li>Historical Climate Records: Analyzing instrumental records of warming, combined with greenhouse gas and aerosol assessments.<\/li><li>Climate Models: Utilizing simulations of Earth&#8217;s climate system for future predictions.<\/li><li>Palaeoclimate Records: Examining natural temperature and CO2 variations over thousands of years from records like ice cores.<\/li><\/ul><\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Why_cant_climate_sensitivity_be_directly_measured\"><\/span>7. Why can&#8217;t climate sensitivity be directly measured?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Direct measurement is impractical, so indirect methods combining historical records, climate models, and palaeoclimate data are employed for estimation.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/edukemy.com\/upsc\/upsc-essay?utm_source=Blog&amp;utm_medium=Banner&amp;utm_campaign=Essay\" target=\"_blank\" rel=\"noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/UPSC-Essay-Course-1280\u00d7300-1-3.svg\" alt=\"\" class=\"wp-image-42688\" width=\"781\" height=\"182\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"In_case_you_still_have_your_doubts_contact_us_on_9811333901\"><\/span><strong>In case you still have your doubts, contact us on 9811333901.<\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>For UPSC Prelims Resources,&nbsp;<a href=\"https:\/\/edukemy.com\/upsc-cse-prelims-resource-centre\" target=\"_blank\" rel=\"noreferrer noopener\">Click here<\/a><\/p>\n\n\n\n<p>For Daily Updates and Study Material:<\/p>\n\n\n\n<p>Join our Telegram Channel &#8211;&nbsp;<a href=\"https:\/\/t.me\/WithEdukemy4IAS\" target=\"_blank\" rel=\"noreferrer noopener\">Edukemy for IAS<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>1. Learn through Videos &#8211;&nbsp;<a href=\"https:\/\/bit.ly\/3vOD8sU\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li><li>2. Be Exam Ready by Practicing Daily MCQs &#8211;&nbsp;<a href=\"https:\/\/bit.ly\/3Q9z2nF\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li><li>3. Daily Newsletter &#8211; Get all your Current Affairs Covered &#8211;&nbsp;<a href=\"https:\/\/bit.ly\/3bE2y5J\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li><li>4. Mains Answer Writing Practice &#8211;&nbsp;<a href=\"https:\/\/bit.ly\/3mZuVxl\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Visit_our_YouTube_Channel_%E2%80%93_here\"><\/span>Visit our YouTube Channel &#8211;&nbsp;<a href=\"https:\/\/www.youtube.com\/@ShabbirsEduKemyforIAS\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><span class=\"ez-toc-section-end\"><\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Climate sensitivity is usually described as the increase in global temperature when the concentration of CO2 in the atmosphere doubles from pre-industrial levels.\u00a0<\/p>\n","protected":false},"author":17,"featured_media":32439,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[276],"tags":[2469,177,232,213,140],"class_list":["post-32437","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecology-environment-general-studies","tag-climate-sensitivity","tag-general-studies-3","tag-upsc","tag-upsc-notes","tag-upsc_preparation_strategy"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/32437","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/comments?post=32437"}],"version-history":[{"count":1,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/32437\/revisions"}],"predecessor-version":[{"id":32440,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/32437\/revisions\/32440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media\/32439"}],"wp:attachment":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media?parent=32437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/categories?post=32437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/tags?post=32437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}