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Ryan D. Dorland EEOS Department Email: ryan.dorland@umb.edu |
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Dissertation Title – “Mesoscale physical processes and zooplankton dynamics in George VI Sound, western Antarctic Peninsula” My research is focused on mesoscale physical and biological processes through field observations, application of geophysical fluid dynamics, and numerical modeling in the Southern Ocean, especially in George VI Sound adjacent to the western Antarctic Peninusla. We collected a suite of physical and biological data during a series of cruises as a part of the Southern Ocean Global Oceans Ecosystems Dynamics Program (SO GLOBEC) in the austral fall and winters of 2001 and 2002. Mesoscale jets and eddies dominate the circulation features in GVI Sound and affect the distribution and retention of zooplankton, including krill, a vital link in the Southern Ocean food web. Using quasigeostrophic dynamics and a combination of CTD and ADCP data, the circulation was examined in detail and combined with the acoustic zooplankton distribution determined from ADCP and net tow data to determine the transport and retention of zooplankton in the region. These results will advance understanding of mesoscale bio-physical coupling and transport in high-lattitudes and allow for more detailed modeling of coastal Antarctic circulation. |
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This project was funded by the NSF through grants to advisor Meng Zhou, UMB. US GLOBEC: Southern Ocean Study (National Science Foundation)
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(In preparation) R.D. Dorland and M. Zhou, 2006. Transport and divergence of zooplankton in George VI Sound, western Antarctic Peninsula. (Submitted) R.D. Dorland and M. Zhou, 2006. Circulation and Heat Fluxes during the Austral Fall in George VI Sound, Antarctic Peninsula. (In Revision) Zhou, M., Niller, P.P., Zhu, Y., and R.D. Dorland, 2006. The western boundary current in Bransfield Strait, Antarctica. Zhou, M. and R.D. Dorland, 2004. Aggregation and vertical migration behavior of Euphausia superba. Deep-Sea Research II, 51: 2119-2137. R.D. Dorland and M. Zhou. 2005. Circulation and Zooplankton Transport During Austral Fall 2001 in George VI Sound, Antarctic Peninsula. ASLO Summer Meeting. Santiago de Compostella, Spain. R. Dorland, M. Zhou, Y. Zhu and J. Smith. 2002. Mesoscale Circulation and Zooplankton Distribution in Laubeuf Fjord, Antarctica. Second GLOBEC Open Science Meeting. Qingdao, P.R. China. M. Zhou, Y. Zhu, R. D. Dorland and J. Smith. 2002. Distribution and behavior of Euphausia superba during austral fall and winter in Marguerite Bay and its vicinity, Antarctic Peninsula. Second GLOBEC Open Science Meeting. Qingdao, P.R. China. R. D. Dorland and M. Zhou. 2002. Mesoscale Circulation in George VI Sound, Antarctica. 2002 Ocean Sciences Meeting Abstracts. Honolulu, HI |
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| updated: 13-March-2006 rdd | |||
The overall goal of the US GLOBEC Southern Ocean project is to elucidate shelf circulation processes and their effect on sea ice formation and Antarctic krill distribution, and to examine the factors that govern krill survivorship and availability to higher trophic levels, including seals, penguins, and whales. The specific goals of our group are to understand mesoscale physical circulation patterns associated with bottom topography, islands, fjords and bays, and to understand krill distribution and effects of mesoscale circulation patterns, and aggregation behavior of krill.