||Can Asian Dust Trigger Phytoplankton Blooms in the Oligotrophic Northern South China Sea.
Wang, S. H. ;
Hsu, N. Y. C. ;
Tsay, S. C. ;
Lin, N. H. ;
Sayer, A. M. ;
Huang, S. J. ;
Lau, W. K. M.
||National Central Univ.; Goddard Space Flight Center, Greenbelt, MD.; National Science Council; Environmental Protection Administration
Satellite observation ;
Sea-viewing wide field-of-view sensor ;
Biological effects ;
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||Satellite data estimate a high dust deposition flux (approximately 18 g m(exp-2 a(exp-1) into the northern South China Sea (SCS). However, observational evidence concerning any biological response to dust fertilization is sparse. In this study, we combined long-term aerosol and chlorophyll-a (Chl-a) measurements from satellite sensors (MODIS and SeaWiFS) with a 16-year record of dust events from surface PM10 observations to investigate dust transport, flux, and the changes in Chl-a concentration over the northern SCS. Our result revealed that readily identifiable strong dust events over this region, although relatively rare (6 cases since 1994) and accounting for only a small proportion of the total dust deposition (approximately 0.28 g m(exp-2 a(exp-1), do occur and could significantly enhance phytoplankton blooms. Following such events, the Chl-a concentration increased up to 4-fold, and generally doubled the springtime background value (0.15 mg m(exp-3). We suggest these heavy dust events contain readily bioavailable iron and enhance the phytoplankton growth in the oligotrophic northern SCS.
||Text in English. Publicly available Unlimited Distribution as joint owner in the copyright. Partially funded by Grants NSC-98-2745-M-008-001, NSC-98-2811-M-008-073, NSC-99-2811-M-008-081, NSC-99-2111-M-008-011, NSC-98-2611-M-019-016-MY3, CASI.
|PUB Date Free Form
||Mar 15 2012
||48 | Natural Resources & Earth Sciences; 97 | Energy
||PC | AC; DL | DL; CA | CA