{"585047":{"#nid":"585047","#data":{"type":"event","title":"PhD Defense by Ioannis Minas (Yannis) Dialynas","body":[{"value":"\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EInfluence of Linked Hydrologic and Geomorphic Processes on the Terrestrial Carbon Cycle\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIoannis Minas (Yannis) Dialynas\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Rafael. L. Bras (CEE \u0026amp; EAS)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Aris P. Georgakakos (CEE), Dr. Jingfeng Wang (CEE), Dr. Daniel deb. Richter (Duke U.), Dr. Athanasios Nenes (EAS \u0026amp; ChBE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E01\/06\/2017 1:00 pm\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESEB 122\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESoil erosion driven by hydro-climatic factors and anthropogenic activity is closely linked to the global carbon (C) cycle. Elucidating complex\u003C\/p\u003E\r\n\r\n\u003Cp\u003Einterrelations between climate, vegetation, soils, and human impacts is critical for advancing our understanding on how diverse ecosystems\u003C\/p\u003E\r\n\r\n\u003Cp\u003Erespond to global environmental change. This work introduces a spatially-explicit process-based model of soil organic C dynamics\u003C\/p\u003E\r\n\r\n\u003Cp\u003E(\u003Cem\u003ETriangulated Irregular Network-based Real-time Integrated Basin Simulator-Erosion and Carbon Oxidation\u003C\/em\u003E), developed within with an\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eexisting coupled physically-based hydro-geomorphic model, to quantify the influence of linked hydrologic and geomorphic processes on the\u003C\/p\u003E\r\n\r\n\u003Cp\u003EC cycle in a range of ecosystems. Two sites are studied: the Calhoun Critical Zone Observatory (CZO) in South Carolina, USA, which has\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eexperienced some of the most serious agricultural soil erosion in North America, and the Luquillo CZO (Puerto Rico), a tropical site of\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eparticular hydro-geomorphological interest. This study uses multiple observations of hydrologic and geomorphic processes and soil\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ebiogeochemical properties.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe substantial topographic variability in the redistribution of soil organic C in agricultural landscapes as soil erosion and deposition proceed\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eis highlighted. The uncertainty characterizing estimates of the hydrologically driven CO2 exchange with the atmosphere in intensively\u003C\/p\u003E\r\n\r\n\u003Cp\u003Emanaged landscapes is significant. In the Luquillo CZO, the capacity of contrasting tropical landscapes to act as a net atmospheric C source\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eor a C sink in response to hydro-climatic perturbations is demonstrated. This work highlights that the natural spatial variation of soil\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ehydrological and geotechnical properties greatly influences slope instability in tropical watersheds. Also, as shown, hillslope erosion and\u003C\/p\u003E\r\n\r\n\u003Cp\u003Elandslide occurrence in the Luquillo CZO are expected to remain significant in the 21st century, despite a projected precipitation decline in\u003C\/p\u003E\r\n\r\n\u003Cp\u003Esouth Caribbean. It is recommended that future studies assessing the contribution of erosion on atmospheric CO2, and the response of diverse\u003C\/p\u003E\r\n\r\n\u003Cp\u003Elandscapes to natural and anthropogenic perturbations systematically account for the fine spatio-temporal variability of linked hydro-climatic,\u003C\/p\u003E\r\n\r\n\u003Cp\u003Egeomorphological, and biogeochemical processes at a range of settings.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026nbsp;\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Influence of Linked Hydrologic and Geomorphic Processes on the Terrestrial Carbon Cycle"}],"uid":"27707","created_gmt":"2016-12-14 18:46:15","changed_gmt":"2017-01-09 11:46:08","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-01-06T10:00:00-05:00","event_time_end":"2017-01-06T12:00:00-05:00","event_time_end_last":"2017-01-06T12:00:00-05:00","gmt_time_start":"2017-01-06 15:00:00","gmt_time_end":"2017-01-06 17:00:00","gmt_time_end_last":"2017-01-06 17:00:00","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":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}