{"629524":{"#nid":"629524","#data":{"type":"event","title":"Greenland\u2019s Shear Margins in Warming Climate: A Summary of Recent Work","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EThe School of Earth and Atmospheric Sciences Presents Dr. Derrick Lampkin, University of Maryland\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EGreenland\u0026rsquo;s Shear Margins in Warming Climate: A Summary of Recent Work\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe Greenland Ice Sheet has experienced unprecedented changes in the couple decades resulting from regional warming resulting in enhanced surface melting. The increased in melting has activated a dynamic surface hydrologic system contributing to significant mass loss. Surface melt runoff contributes directly to Greenland\u0026rsquo;s mass loss as well as infiltration which impact ice dynamics and mass discharge.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe ice sheet has a several critical factors that can influence mass loss, which includes the loss of ice shelves\/tongues, enhanced calving at marine-terminating outlet glaciers, and an evolving basal hydrologic system due to infiltration of surface melt. In particular, the impact of surface melt water on ice dynamics via supraglacial lake drainage and runoff has been well documented.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELittle attention has been focused on direct injection of surface melt water into the shear margins of fast flowing, marine-terminating outlet glaciers, which are a critical control on mass flux from marine-terminating outlet glaciers. Our initial work was the first to characterize water-filled crevasse ponds within the shear margins of Jakobshavn Isbr\u0026aelig;\u0026nbsp;and assessment the volume of infiltrated melt water potentially reaching the bed.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the intervening years since this seminal work, we have utilized satellite observations and numerical models to decode the impact of hydrologic shear weakening due to melt water injection from these structures with implications for the evolution of Greenland\u0026rsquo;s other marine-terminating outlet glaciers under a warming climate.\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. Derrick Lampkin, School of Earth and Atmospheric Sciences"}],"uid":"34458","created_gmt":"2019-12-02 17:29:15","changed_gmt":"2020-01-09 16:07:18","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-01-23T11:00:00-05:00","event_time_end":"2020-01-23T11:50:00-05:00","event_time_end_last":"2020-01-23T11:50:00-05:00","gmt_time_start":"2020-01-23 16:00:00","gmt_time_end":"2020-01-23 16:50:00","gmt_time_end_last":"2020-01-23 16:50:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"629502":{"id":"629502","type":"image","title":"Derrick Lampkin","body":null,"created":"1575305976","gmt_created":"2019-12-02 16:59:36","changed":"1575305976","gmt_changed":"2019-12-02 16:59:36","alt":"","file":{"fid":"239733","name":"Derrick Lampkin.JPG","image_path":"\/sites\/default\/files\/images\/Derrick%20Lampkin.JPG","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Derrick%20Lampkin.JPG","mime":"image\/jpeg","size":31705,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Derrick%20Lampkin.JPG?itok=jUdau91d"}}},"media_ids":["629502"],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (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":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EDr. Alexander Robel\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}