Name: Aleksandra Wolanin
Institute: Alfred-Wegener-Institute for Polar and Marine Research / University of Bremen
Department: Climate Science / Physics and Electrical Engineering / Institute of Environmental Physics
Phone: +49-(0)421-218 62081
PhD project title: Remote Sensing of marine CDOM and chlorophyll fluorescence using high spectrally resolved satellite data
Phytoplankton primary production and CDOM photo-oxidation have opposing impacts on carbon fluxes in the ocean. Balance between the two processes may be significantly affected in the near future by climate change. This is especially true for the Arctic Ocean, which is increasingly exposed to light as perennial ice recedes, and which receives increasing amounts of terrigenous dissolved organic matter (tDOM) as the permafrost thaws and river discharges increase.
Aim of this PhD is to use the information derived from the high spectral resolved satellite data (satellite measurements of the ENIVSAT instruments SCIAMACHY and MERIS, synergistically) in order to develop a retrieval technique to determine the CDOM fluorescence signal and from that quantify the amount of CDOM in the open ocean, with a focus on the Arctic Ocean.
With these data covering the time from 2002 until today, the change in CDOM concentration in relation to the marine Arctic primary production (mainly phytoplankton) will be studied.
Start of doctoral thesis: 01st October, 2011
Defense of doctoral thesis: 01st September, 2015
PhD committee members:
Supervisor: Prof. Dr. Astrid Bracher (AWI/Bremen University, IUP)
Co-Supervisor: Prof. John P. Burrows (Bremen University, IUP)
Further members: Dr. Tilman Dinter (AWI/Bremen University, IUP), Prof. Dr. Boris Koch (AWI), Dr. Vladimir Rozanov (Bremen University, IUP), Dr. Marco Vountas (Bremen University, IUP)
A. Wolanin, V. Rozanov, A. Rozanov, J.P. Burrows, T. Dinter and A. Bracher: Application of coupled ocean-atmospheric RTM SCIATRAN to retrieve chlorophyll and CDOM fluorescence from space: first results. International Radiation Symposium 2012, Berlin, Germany.
A. Wolanin, V. Rozanov, A. Rozanov, J.P. Burrows, T. Dinter and A. Bracher: Application of coupled ocean-atmospheric RTM SCIATRAN to retrieve chlorophyll and CDOM fluorescence from space: first results. ESSReS Retreat, 30th November, Bremerhaven, Germany.
Dinter, T. , Rozanov, V. , Sadeghi, A. , Wolanin, A. , Taylor, B. and Bracher, A. (2012): Retrieval of oceanic phytoplankton with a combined Phytodoas-RTM method utilizing hyper spectral satellite measurements , 44th International Liège Colloquium On Ocean Dynamics, Liège, Belgium, 7 May 2012 - 11 May 2012.
A. Wolanin, A. Bracher, T. Dinter, V. Rozanov: Remote sensing of marine CDOM and chlorophyll fluorescence using high spectrally resolved satellite data. Seminar Ocean, Ice, and Atmosphere, Institute of Environmental Physics, University of Bremen, Bremen, Germany, May 2012
Bracher, A. , Dinter, T. , Sadeghi, A. , Wolanin, A. , Altenburg Soppa, M. , Taylor, B. , Rozanov, V. , Vountas, M. , Röttgers, R. and Peeken, I. (2012): Ocean color products from hyperspectral satellite sensor SCIAMACHY compared to products from the multispectral sensors MERIS, MODIS and SeaWiFS. , Sentinel-3 OLCI/SLSTR & MERIS/(A)ATSR Workshop, ESA-ESRIN, Frascati, Italy, 15 October 2012 - 19 October 2012 .
RV Polarstern: ARK-XXVII/I, 2012-06-14 Bremerhaven (Germany) – 2012-07-15 Longyearbyen, Svalbard (Norway)