Coupling between SW monsoon‐related surface and deep ocean processes as discerned from continuous particle flux measurements and correlated satellite data

作者：Tim Rixen, B. Haake, V. Ittekkot, M.V.S. Guptha, R.R. Nair, Peter Schlüssel · 发表于：Journal of Geophysical Research Atmospheres · 年份：1996 · DOI：10.1029/96jc02420 · 被引用次数：123 · 研究领域：Oceanographic and Atmospheric Processes、Marine and coastal ecosystems、Marine and fisheries research

Particle flux data obtained by time series sediment traps deployed at water depths of approximately 3000 m in the western, central, and eastern Arabian Sea since 1986 were compared with wind speeds derived from measurements made by microwave radiometer flying on polar orbiting satellites and sea surface temperatures (SSTs) provided by the Physical Oceanography Distributed Active Archive Center at Jet Propulsion Laboratory. This comparison has allowed us to trace the link between the oceanographic and biological processes related to the development of the SW monsoon with the pattern and interannual variability of particle fluxes to the interior of the Arabian Sea. We could recognize the well‐known upwelling systems along the coasts of Somalia and Oman as well as open ocean upwelling at the beginning of the SW monsoon. Both open ocean upwelling and coastal upwelling off Oman cause a cooling of surface waters at our western and central Arabian Sea stations. When SSTs fall below their long‐term average, an increase in fluxes which are dominated by coccolithophorid‐derived carbonates occurs. The timing of this increase is determined by the rate of surface water cooling. Further intensification of upwelling as the SW monsoon progresses causes additional increases in biogenic opal fluxes denoting diatom blooms in the overlying waters. The total fluxes during this period are the highest measured in the open Arabian Sea. At the central Arabian Sea location the fluxes are only randomly...