{"id":14474,"date":"2011-08-04T18:21:52","date_gmt":"2011-08-05T01:21:52","guid":{"rendered":"http:\/\/blogs.kqed.org\/climatewatch\/?p=14474"},"modified":"2018-02-02T00:20:49","modified_gmt":"2018-02-02T00:20:49","slug":"climate-changes-unusual-suspects","status":"publish","type":"post","link":"https:\/\/ww2.kqed.org\/climatewatch\/2011\/08\/04\/climate-changes-unusual-suspects\/","title":{"rendered":"Climate Change’s Unusual Suspects"},"content":{"rendered":"
\"\"
A rice field in the Sacramento Valley. According to NOAA, rice paddies are a source of methane emissions. Photo: Craig Miller<\/figcaption><\/figure>\n

Despite all the focus on regulating CO2<\/a> as a way to combat global warming,<\/a> a new NOAA study<\/a> finds that to really put the brakes on climate change, the world can’t ignore the other greenhouse gases.<\/p>\n

The study takes an inventory of non-carbon greenhouse gases including methane<\/a>, which emits from landfills and farms, and nitrous oxide<\/a>, which primarily comes from soil management and combustion. Per molecule, the study notes that these gases have a stronger muscle for trapping heat compared with carbon dioxide, but they don’t last as long in the atmosphere.<\/p>\n

“This study looks at what would happen if society decided to go after the short-lived greenhouse gases, as well as CO2.” said Jim Butler, Director of Global Monitoring at NOAA and author of the study.<\/p>\n

Short-lived is a relative term in atmospheric science. Butler said it takes decades for methane to fully run its course in the atmosphere, during which its potential to trap heat is much greater, even though its share in the atmosphere is pennies compared to that of CO2.<\/p>\n

Carbon dioxide sticks around much longer, some of it for thousands of years, said Butler.<\/p>\n

“CO2 is still the big dog in the fight,” he said. <\/p>\n

\"\"
The warming impacts from all human-based greenhouse gases. With 390ppm, CO2 leads the pack but methane, at 1.8ppm, and nitrous oxide, at 0.3ppm, trail closely. Table: NOAA<\/figcaption><\/figure>\n

Butler said that the concentration of carbon dioxide in the atmosphere is now at 390 parts per million and is responsible for 63% of all greenhouse gas warming influence, as shown in the NOAA chart above.\u00a0 The study equates this warming influence to the heat generated from nine trillion, 100-watt light bulbs.<\/p>\n

Butler likens this persistent heating effect to a hot electric blanket.<\/p>\n

“If we cut emissions, the [heat of] blanket would still go up by a bit,” said Butler.\u00a0 “We can’t turn the blanket back down very fast.”<\/p>\n

\"\"
A graph showing the outcomes between the current emissions trajectory (in red) and a scenario where CO2 and non CO2 greenhouse gases are cut by 80% of 2008 levels. Graph: NOAA<\/figcaption><\/figure>\n

The NOAA scientists graphed the “electric blanket” heating outcomes under different emissions scenarios. Even under the most optimistic scenario, where 80% of all greenhouse gases are cut, the study finds it will take 40 years before the blanket’s thermostat goes down.<\/p>\n

\u201cThe long-term necessity of cutting carbon dioxide emissions shouldn\u2019t diminish the effectiveness of short-term action,\u201d said Butler in a press release. \u201cManaging emissions of non-carbon dioxide gases is clearly an opportunity to make additional contributions.\u201d<\/p>\n

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

Despite all the focus on regulating CO2 as a way to combat global warming, a new NOAA study finds that to really put the brakes on climate change, the world can’t ignore the other greenhouse gases.<\/p>\n","protected":false},"author":11422,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[193,265,357,386],"coauthors":[],"series":[],"affiliates":[],"programs":[],"collections":[],"interests":[],"class_list":["post-14474","post","type-post","status-publish","format-standard","hentry","category-thescience","tag-emissions","tag-greenhouse-gases","tag-methane","tag-noaa"],"acf":{"template_type":"standard","featured_image_type":"standard","is_audio_post":false},"yoast_head":"\nClimate Change's Unusual Suspects | Climate Watch<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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