Description: Das Projekt "Antarctic precipitation, snow accumulation processes, and ice-ocean interactions" wird vom Umweltbundesamt gefördert und von Ecole Polytechnique Federale de Lausanne (EPFL), Faculte ENAC, IIE, Laboratoire des sciences cryospheriques (CRYOS) durchgeführt. The Antarctic ice sheet and ice shelves cover an area of ca. 14 million km2, over 300 times the area of Switzerland. An additional 19 million km2 of winter sea ice expands the overall southern cryosphere to greater than 6 percent of the Earths surface. With ca. 15 million km2 of that sea ice melting away each summer, the Southern Ocean sea ice cover is one of the largest annual changes on the Earths surface. These large numbers underscore the importance of the Antarctic to global climate processes, and challenge our ability to accurately represent the Antarctic in global climate models. Switzerlands long history of involvement in Antarctic climate and paleoclimate research became grounds for its advancement to full membership in the Scientific Committee on Antarctic Research in 2004. In recognition of growing Swiss interest in the Antarctic, field research described in this proposal will be an international collaborative effort, using logistics and environmental permits issued by Australia, Belgium and Germany. Three distinct lines of research will be pursued with the support requested from SNF and with the assistance of facilities and graduate students provided by the EPFL-ENAC-IIE-CRYOS Laboratory. These research topics will contribute to an increased understanding of oceanic and atmospheric processes influencing the mass balance of the Antarctic sea ice and ice sheet. 1) Field measurements of precipitation, blowing snow, and snow thickness distribution in the Antarctic sea ice zone. International research cruises into Antarctic sea ice fields in consecutive austral winters (September - October 2012 and June - August 2013) will measure blowing snow transport, precipitation, and snow accumulation patterns on sea ice. A PhD student whose dissertation research focuses on snow distribution on sea ice will participate in this work. 2) Numerical modeling of precipitation, blowing snow, and accumulation of snow over sea ice and coastal regions of the Antarctic ice sheet. Precipitation, blowing snow and related measurements obtained during these expeditions will be used in the validation of a high-resolution numerical model of blowing snow transport. That model will in turn be used in larger-scale studies of precipitation enhancement of blowing snow processes, sublimation and riming of atmospheric ice crystals, and the recycling of moisture between the sea ice zone and the Antarctic ice sheet. 3) Time-series oceanographic measurements in a remote area of the east Antarctic coastline, in collaboration with Belgian and EU research programs on ice sheet stability and sea level rise. This study will focus on coastal ocean processes that have been largely overlooked in recent assessments of ice sheet mass balance and the potential contribution of the East Antarctic ice sheet to near-term sea level rise.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Niederschlagshöhe ? Recycling ? Antarktischer Eisschild ? Resistenz ? Belgien ? Bundesrepublik Deutschland ? Schweiz ? Schelfeis ? Genehmigung ? Glaziologie ? Meereskunde ? Meeresspiegelanstieg ? Regenwasser ? Sommer ? Winter ? Antarktis ? Meereis ? Globales Klimamodell ? Antarktisforschung ? Ackerland ? Bewertung ? Bilanz ? Schnee ? Studie ? Meeresgewässer ? Küstenregion ? Modellierung ? Schmelzen ? Messung ? Küstenlinie ? Kryosphäre ? Schifffahrt ? Bebauung ? Erdoberfläche ? Forschung ? Forschungseinrichtung ? Forschungsprogramm ? Klima ? Niederschlag ? Überwinterung ? Umwelt ? Verkehr ? Feuchtigkeit ? Anlage ? Gebiet ? Globale Aspekte ? Logistik ? Maßnahme ? Atmosphärischer Prozess ? Abdeckung ? Südlicher Ozean ? Anreicherung ? Arbeit ? Ozean ? MOEGLICHKEIT ? NEU ? PRAEZIPITATION ? VORSCHLAEGE ? VORSCHLAG ? Bilanz [Betriebswirtschaft] ? Schmelzbad ? DAUER ? DICKE ? BEITRAG ? Vermehrung ? Sublimation ? WISSENSCHAFTLICH ? VERFRACHTUNG ? Zins ? EIN ? FOERDERN ? FORSCHUNGSGEBIET ? VERTEILUNG ? POTENZIAL ? INITIATIVE ? PROGRAMMIERUNG ? VERWANDT ? 20130515 20100101 ? SUEDLICH ? GEBRAUCHT ? Muskelarbeit ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2013-01-01 - 2015-12-31
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