{"id":262,"date":"2016-03-09T10:01:45","date_gmt":"2016-03-09T18:01:45","guid":{"rendered":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/?p=262"},"modified":"2016-09-09T10:04:03","modified_gmt":"2016-09-09T17:04:03","slug":"mwhiticar-march162016","status":"publish","type":"post","link":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/2016\/03\/09\/mwhiticar-march162016\/","title":{"rendered":"Seminar by Michael Whiticar on March 16, 2016"},"content":{"rendered":"<p><strong>Understanding and Tracking Some Critical Methane Interactions between Geo-, Hydro-, Cryo- and Atmosphere<\/strong><br \/>\nMichael Whiticar<\/p>\n<p>Wednesday, March 16, 2016<br \/>\nLocation: Grad House<\/p>\n<p>Abstract<br \/>\nAlthough atmospheric CO 2 (~402 ppm, ~850 PgC) seems to occupy most of the<br \/>\nGreenhouse Gas conversation, it is still important to consider atmospheric methane (1.84<br \/>\nppm, ~3.7 PgC). From a Global Warming Potential perspective, CH 4 is at least 21x higher<br \/>\nthan CO 2 on a 100 yr. basis, and ~56x on a 20 yr. comparison. This leads to a radiative<br \/>\nforcing (RF, 1750 \u2013 2011) of ~0.48 Wm -2 for CH 4 compared with 1.82 Wm -2 for CO 2 , i.e.,<br \/>\nRF CH4 is ~ 26 % of RF CO2 despite a 230x lower burden.<\/p>\n<p>Both natural and anthropogenic sources and sinks contribute to the tropospheric CH 4<br \/>\nfluxes and budget, but the majority of CH 4 is some reduction pathway of organic matter,<br \/>\nfrequently by Archaea (methanogens), or by thermogenic maturation. Abiotic methane<br \/>\ndoes exist, but plays a minor role here, in contrast to Mars.<\/p>\n<p>This presentation takes you on a wild, spatial and temporal tour of the major methane<br \/>\nsystems, including wetlands, permafrost, natural gas deposits, cows, and gas hydrates,<br \/>\netc. We will explore some of the critical and\/or controversial components&#8230;think \u2018termites\u2019<br \/>\nor \u2018clathrate gun hypothesis\u2019, etc.<\/p>\n<p>I promise to introduce isotope lines of evidence, but only one equation, as we explore this<br \/>\noft-ignored, silent but deadly (and odourless) gas.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding and Tracking Some Critical Methane Interactions between Geo-, Hydro-, Cryo- and Atmosphere Michael Whiticar Wednesday, March 16, 2016 Location: Grad House Abstract Although atmospheric CO 2 (~402 ppm, ~850 PgC) seems to occupy most of the Greenhouse Gas conversation, it is still important to consider atmospheric methane (1.84 ppm, ~3.7 PgC). From a Global&hellip; <a class=\"more-link\" href=\"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/2016\/03\/09\/mwhiticar-march162016\/\">Continue reading <span class=\"screen-reader-text\">Seminar by Michael Whiticar on March 16, 2016<\/span><\/a><\/p>\n","protected":false},"author":4400,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-262","post","type-post","status-publish","format-standard","hentry","category-uncategorized","entry"],"_links":{"self":[{"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/posts\/262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/users\/4400"}],"replies":[{"embeddable":true,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/comments?post=262"}],"version-history":[{"count":1,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/posts\/262\/revisions"}],"predecessor-version":[{"id":263,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/posts\/262\/revisions\/263"}],"wp:attachment":[{"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/media?parent=262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/categories?post=262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onlineacademiccommunity.uvic.ca\/climate\/wp-json\/wp\/v2\/tags?post=262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}