Title ENSO and variability of the Antarctic Peninsula pelagic marine ecosystem
Author Loeb, V.J.; Hofmann, E.E.; Klinck, J.M.; Holm-Hansen, O.; White, W.B.
Author Affil Loeb, V.J., Moss Landing Marine Labortories, Moss Landing, CA. Other: Old Dominion University; Scripps Institution of Oceanography
Source Antarctic Science, 21(2), p.135-148, . Publisher: Cambridge University Press, Cambridge, United Kingdom. ISSN: 0954- 1020
Publication Date Apr. 2009
Notes In English. 51 refs. Ant. Acc. No: 85925. GeoRef Acc. No: 291382
Index Terms atmospheric circulation; climatic change; ecology; ecosystems; ice; ocean environments; plankton; Antarctica--Antarctic Peninsula; Antarctic Circumpolar Current; Antarctic Peninsula; Antarctica; Arthropoda; climate change; Crustacea; El Nino Southern Oscillation; ice cover distribution; Invertebrata; Mandibulata; marine environment; ocean circulation; pelagic environment; phytoplankton; sea ice; zooplankton
Abstract The West Antarctic Peninsula region is an important source of Antarctic krill (Euphausia superba) in the Southern Ocean. From 1980-2004 abundance and concentration of phytoplankton and zooplankton, krill reproductive and recruitment success and seasonal sea ice extent here were significantly correlated with the atmospheric Southern Oscillation Index and exhibited three- to five-year frequencies characteristic of El Nino-Southern Oscillation (ENSO) variability. This linkage was associated with movements of the Southern Antarctic Circumpolar Current Front and Boundary, a changing influence of Antarctic Circumpolar Current and Weddell Sea waters, and eastward versus westward flow and mixing processes that are consistent with forcing by the Antarctic Dipole high-latitude climate mode. Identification of hydrographic processes underlying ecosystem variability presented here were derived primarily from multi-disciplinary data collected during 1990- 2004, a period with relatively stable year-to- year sea ice conditions. (Modif. J. Abstr.)
URL http://hdl.handle.net/10.1017/s0954102008001636
Publication Type journal article
Record ID 63003827