| タイトル | Further Studies on the Physical and Biogeochemical Causes for Large Interannual Changes in the Patagonian Shelf Spring-Summer Phytoplankton Bloom Biomass |
| 本文（外部サイト） | http://hdl.handle.net/2060/20090027886 |
| 著者（英） | Garcia, Virginia M.T.; McClain, Charles R.; Piola, Alberto R.; Garcia, Carlos A.E.; Signorini, Sergio R.; Evangelista, Heitor; Mata, Mauricio M. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2009-02-01 |
| 言語 | eng |
| 内容記述 | A very strong and persistent phytoplankton bloom was observed by ocean color satellites during September - December 2003 along the northern Patagonian shelf. The 2003 bloom had the highest extent and chlorophyll a (Chl-a) concentrations of the entire Sea-viewing Wide Field-of-view Sensor (SeaWiFS) period (1997 to present). SeaWiFS-derived Chl-a exceeded 20 mg/cu m in November at the bloom center. The bloom was most extensive in December when it spanned more than 300 km across the shelf and nearly 900 km north-south (35degS to 43degS). The northward reach and the deep penetration on the shelf of the 2003 bloom were quite anomalous when compared with other years, which showed the bloom more confined to the Patagonian shelf break (PSB). The PSB bloom is a conspicuous austral spring-summer feature detected by ocean color satellites and its timing can be explained using the Sverdrup critical depth theory. Based on high-resolution numerical simulations, in situ and remote sensing data, we provide some suggestions for the probable mechanisms responsible for that large interannual change of biomass as seen by ocean color satellites. Potential sources of macro and micro (e.g., Fe) nutrients that sustain the high phytoplankton productivity of the Patagonian shelf waters are identified, and the most likely physical processes that maintain the nutrient balance in the region are discussed. |
| NASA分類 | Oceanography |
| レポートNO | 200900836
NASA/TM-2009-214176 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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