{"600185":{"#nid":"600185","#data":{"type":"event","title":"Soil Organic Carbon: Nano-Scale Stabilization to Global-Scale Climate Implications","body":[{"value":"\u003Ch4\u003EEAS Spring 2018 Seminar Series Presents: Dr. Johannes Lehmann, Cornell University\u003C\/h4\u003E\r\n\r\n\u003Cp\u003ESoils harbor large amounts of organic carbon that exceed the carbon in the plants and atmosphere combined. Soil organic matter is also a very heterogeneous mixture encompassing weakly decomposed plant matter to highly oxidized and reactive microbial metabolites.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ERecent insights of the spatial distribution and the molecular properties led to a shift away from secondary synthesis to recalcitranthumic\u0026nbsp;substances towards a soil continuum model. Persistence is then conferred by environmental conditions rather than intrinsic molecular recalcitrance. Interactions with minerals as well as encapsulation within aggregation are currently perceived as the main drivers for carbon persistence in soil. Increasing soil carbon stocks by a comparably low proportion may be utilized to draw down carbon dioxide levels in the atmosphere and thereby mitigate climate change.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA range of avenues exist that are explored, and despite burgeoning political efforts a comprehensive and actionable roadmap remains elusive.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. Johannes Lehmann, School of Earth and Atmospheric Sciences Spring 2018 Seminar Speaker Series"}],"uid":"34458","created_gmt":"2017-12-21 14:56:05","changed_gmt":"2018-02-22 20:03:11","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-04-05T12:00:00-04:00","event_time_end":"2018-04-05T12:50:00-04:00","event_time_end_last":"2018-04-05T12:50:00-04:00","gmt_time_start":"2018-04-05 16:00:00","gmt_time_end":"2018-04-05 16:50:00","gmt_time_end_last":"2018-04-05 16:50:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"600170":{"id":"600170","type":"image","title":"Johannes Lehmann","body":null,"created":"1513863514","gmt_created":"2017-12-21 13:38:34","changed":"1513863514","gmt_changed":"2017-12-21 13:38:34","alt":"","file":{"fid":"228803","name":"Johannes Lehmann.jpg","image_path":"\/sites\/default\/files\/images\/Johannes%20Lehmann.jpg","image_full_path":"http:\/\/tlwarc.hg.gatech.edu\/\/sites\/default\/files\/images\/Johannes%20Lehmann.jpg","mime":"image\/jpeg","size":10372,"path_740":"http:\/\/tlwarc.hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Johannes%20Lehmann.jpg?itok=L8bbQqdS"}}},"media_ids":["600170"],"groups":[{"id":"364801","name":"EAS"}],"categories":[],"keywords":[{"id":"175623","name":"EAS Seminar"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EHost: Yuanzhi Tang\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELogistics: Natasha Lawson\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}