Name: Sandra Schwegmann (ESSReS PhD student)
Institute: Alfred Wegener Intitute
Department: Sea Ice Physics
Web link: http://www.awi.de/en/research/research_divisions/climate_science/sea_ice_physics/
PhD-project title: Interannual and decadal variability of sea ice concentration, drift, and thickness in the Weddell Sea.
Due to its low thermal conductivity sea ice reduces heat exchange between ocean and atmosphere. This affects the atmospheric and oceanic circulations.
Furthermore the high albedo of the ice has an influence on the energy balance of the atmosphere.
While sea ice is formed, salt runs into the ocean and affects the density of the upper water layer. If the density is high enough the water sinks down. This process has an impact on the oceanic circulation.
Because these processes are dependent from the age of the ice I will use scatterometer satellite data to estimate ice type and therefore ice age. Furthermore these data can be used for determination of drift velocities and ice extent.
An additional goal of this thesis is the determination of interannual and decadal variability of sea ice properties like thickness and concentration as well as the connection between these parameters and the atmospheric forcing.
Start of doctoral thesis: 01.05.2008 | Defence: 12.03.2012
Supervisor: Prof. Dr. P. Lemke (AWI, Bremen University)
Co-Supervisor: Prof. Dr. C. Haas (University of Alberta)
Further members: Prof. Dr. R. Gerdes (AWI, Jacobs University)
Dr. R. Timmermann (AWI)
Schwegmann, S., C. Haas, C. Fowler and R. Gerdes: A comparison of satellite-derived sea ice motion with drifting buoy data in the Weddell Sea, Antarctica. Annals of Glaciology, 52(57), 103-110, 2010.
Sandra Schwegmann: "Drift and ice production in the Larsen Region, Weddell Sea", ISSI project meeting: "Monitoring of Antarctic Sea Ice during IPY", International Space Science Institute (ISSI), Bern, June 30 - July 3, 2008.
Sandra Schwegmann, C. Haas, R. Timmermann, R. Gerdes, and P. Lemke, Decadal Variability of Sea Ice Motion in the Weddell Sea for the Period of 1979 to 2006, EGU General Assembly, 19 - 24 April 2009. (Poster)
Sandra Schwegmann, C. Haas, R. Timmermann, R. Gerdes, and P. Lemke, The importance of large scale sea ice drift and ice type distribution on ice extent in the Weddell Sea, AGU Fall Meeting 2009, 14 -18 December 2009. (Poster)
Sandra Schwegmann, C. Haas, R. Timmermann, R. Gerdes, and P. Lemke, The importance of large scale sea ice drift and ice type distribution on ice extent in the Weddell Sea, IGS International Symposium on Sea Ice in the Physical and Biogeochemical System, 31. May - 04. June 2010.
DAAD stipend from 9 September until 30 November 2009 for research stay at University of Alberta, Edmonton, Kanada.
Sandra Schwegmann, The importance of large scale sea ice drift and ice type distribution on ice extent in the Weddell Sea, ESSReS-Retreat 18 June 2010, “Poster award”
Helicopter EM sea ice thickness measurements, 28.02. - 08.03.10 Helsinki, Finland.
Antarctic-Expedition ANT XXVII/2, 28.11.10 - 05.02.11, Cape Town, South Africa to Punta Arenas, South Chile.