{"640436":{"#nid":"640436","#data":{"type":"event","title":"PhD Defense by Filippos Tagklis","body":[{"value":"\u003Cp\u003EFilippos Tagklis\u003Cbr \/\u003E\r\n(Advisor: Prof. Annalisa Bracco)\u003Cbr \/\u003E\r\nwill defend a doctoral thesis entitled,\u003Cbr \/\u003E\r\nProjected changes in a multiscale environment: the subpolar North Atlantic Ocean\u003Cbr \/\u003E\r\nOn\u003Cbr \/\u003E\r\nMonday November 2 at 2pm\u003Cbr \/\u003E\r\nAbstract\u003Cbr \/\u003E\r\nBy the end of this century, the Oceans will markedly change in response to anthropogenic stressors and increasing greenhouse gas emissions. Their circulation and the horizontal and vertical transport of heat, salt, carbon, oxygen and nutrients will be impacted. In response to rising temperatures, stratification will increase in the upper water column, affecting ventilation of the deep ocean and nutrient transport from the deep and nutrient-rich waters to the euphotic layer. Seawater will become more acidic as well, as atmospheric carbon dioxide is taken up by the ocean and redistributed by its circulation, and will lose oxygen.\u003Cbr \/\u003E\r\nThe global oceans are replenished by newly ventilated water to depths far greater than the euphotic layer only in few, high latitude areas where open ocean deep convection and deep-water formation occur. In the North Atlantic (NA), the Labrador Sea (LS) is one of such regions, and the best observed. Predicting the evolution of the ocean circulation and marine ecosystem changes in the North Atlantic is therefore central to understand the future climate trajectory.\u003Cbr \/\u003E\r\nThis thesis presents an analyses of state-of-the-art Earth Systems Models (ESMs) included in the Coupled Model Intercomparison Project Phase 5 (CMIP5), and investigates their skill in representing the physics and biogeochemistry of the subtropical and subpolar NA regions and their evolution at centennial timescales. Attention is paid to oxygen and nutrient inventories, and to the mechanisms that regulate the changes of oxygen and nutrients. Additionally, simulations by a state-of-the-art high-resolution regional ocean model are performed and analyze to quantify how\u003Cbr \/\u003E\r\nand how much ocean turbulence impacts deep convection and oxygen and carbon drawdown in the LS.\u003Cbr \/\u003E\r\nCommittee\u003Cbr \/\u003E\r\nDr. Annalisa Bracco, Advisor\u003Cbr \/\u003E\r\nSchool of Earth and Atmospheric\u003Cbr \/\u003E\r\nSciences\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003Cbr \/\u003E\r\nDr. Renato M Castelao\u003Cbr \/\u003E\r\nDepartment of Marine Sciences\u003Cbr \/\u003E\r\nUniversity of Georgia\u003Cbr \/\u003E\r\nDr. Takamitsu Ito, co-Advisor\u003Cbr \/\u003E\r\nSchool of Earth and Atmospheric\u003Cbr \/\u003E\r\nSciences\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003Cbr \/\u003E\r\nDr. Igor Yashayaev\u003Cbr \/\u003E\r\nBedford Institute of Oceanography (BIO)\u003Cbr \/\u003E\r\nDr. Emanuele Di Lorenzo\u003Cbr \/\u003E\r\nSchool of Earth and Atmospheric\u003Cbr \/\u003E\r\nSciences\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Projected changes in a multiscale environment: the subpolar North Atlantic Ocean"}],"uid":"27707","created_gmt":"2020-10-21 15:52:04","changed_gmt":"2020-10-21 17:43:19","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-11-02T14:00:00-05:00","event_time_end":"2020-11-02T16:00:00-05:00","event_time_end_last":"2020-11-02T16:00:00-05:00","gmt_time_start":"2020-11-02 19:00:00","gmt_time_end":"2020-11-02 21:00:00","gmt_time_end_last":"2020-11-02 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}