{"609195":{"#nid":"609195","#data":{"type":"event","title":"Untangling Natural and Anthropogenic Climate Signals, with Implications for the PDO and AMO","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EEAS Fall 2018 Seminar Series Presents: Dr. David Battisti, University of Washington\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EUntangling Natural and Anthropogenic Climate Signals, with Implications for the PDO and AMO\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe introduce a novel method to separate modes of internal variability from global warming based on differences in timescale and spatial pattern, without relying on climate models.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe identify uncorrelated components of Pacific sea-surface temperature (SST) variability due to global warming, the Pacific Decadal Oscillation (PDO), and the El Nino-Southern Oscillation (ENSO).\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOur results give statistical representations of PDO and ENSO that are consistent with there being separate processes, operating on different timescales, but are otherwise consistent with canonical definitions.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe isolate the multi-decadal variability of the PDO and find that it is confined to midlatitudes; tropical SSTs and their teleconnections mix in higher-frequency variability. Similarly, we find that the Atlantic Meridional Oscillation (AMO) is focused in the North Atlantic subpolar gyre, off the southern coast of Greenland.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EUsing climate models, we show that warm subpolar temperatures are associated with a strengthened Atlantic Meridional Overturning Circulation (AMOC) and local heat fluxes from the ocean into the atmosphere. Shifts in atmospheric circulations are an important influence on the intensification and subsequent weakening of AMOC and help to communicate the warming into the tropical Atlantic.\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. David Battisti, School of Earth and Atmospheric Sciences Fall 2018 Seminar Series"}],"uid":"34458","created_gmt":"2018-08-01 15:27:03","changed_gmt":"2018-10-12 13:17:01","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-10-18T12:00:00-04:00","event_time_end":"2018-10-18T12:50:00-04:00","event_time_end_last":"2018-10-18T12:50:00-04:00","gmt_time_start":"2018-10-18 16:00:00","gmt_time_end":"2018-10-18 16:50:00","gmt_time_end_last":"2018-10-18 16:50:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"609194":{"id":"609194","type":"image","title":"David Battisti","body":null,"created":"1533137036","gmt_created":"2018-08-01 15:23:56","changed":"1533137036","gmt_changed":"2018-08-01 15:23:56","alt":"","file":{"fid":"232023","name":"battisti--david.jpg","image_path":"\/sites\/default\/files\/images\/battisti--david.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/battisti--david.jpg","mime":"image\/jpeg","size":13972,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/battisti--david.jpg?itok=cR5wcZeT"}}},"media_ids":["609194"],"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\u003ENatasha Lawson\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}