Piontkovski, S. State University of New York at Stony Brook, Marine Sciences Research Center, spiontkovski@notes.cc.sunysb.edu
Hameed, S. State University of New York at Stony Brook, Marine Sciences Research Center, hameed@atmsci.msrc.sunysb.edu
Conversi, A. ENEA, Marine Environmental Center, conversi@estosf.santateresa.enea.it

 
ATMOSPHERIC CENTERS OF ACTION AND INTERANNUAL CHANGES OF ZOOPLANKTON ABUNDANCE
 
The large scale pressure systems that dominate atmospheric and oceanic circulation are known as the "Centers of Action" (COAs) in meteorology. Interannual changes of mesozooplankton abundance sampled along the British Isles (30 years of data), the Gulf of Maine (30 years), Gulf of Alaska (23 years), and the Black Sea (34 years) were related to the atmospheric preassue indices, latitude and longitude of COAs. For a number of the Atlantic Ocean regions, we found zooplankton abundance lagging interannual fluctuations of COAs from 1 to 3 years. We also studied the impact of COAs on spatial characteristics of a current (where the Gulf Stream was taken as an example). Positive correlations (at P=95%) were obtained for the Azores High winter pressure with the latitude of the Gulf Stream position (its North Wall) lagging the Azores High by two years, and negative correlations with Icelandic Low winter pressure were obtained with North Wall lagging up by 2 years. Amplitudes of fluctuations observed in zooplankton time series are comparable to horizontal gradients of macroscale spatial heterogeneity of zooplankton in the studied regions. Regional differences in plankton-COAs linkages are analysed.
 
Day: Tuesday, Feb. 2
Time: 03:45 - 04:00pm
Location: Hilton of Santa Fe
 
Code: CS67TU0345H