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General Session 1: Physical oceanic processes: Dynamics and physical-biological-biogeochemical interactions |
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Effects of the interannual variability in chlorophyll concentrations on sea surface temperatures in the east tropical Indian Ocean
Monday 9th @ 1550-1605
Conference Hall
Jinfeng Ma* , Institute of Atmospheric Physics, Chinese Academy of Sciences
Hailong Liu, Institute of Atmospheric Physics, Chinese Academy of Sciences
Pengfei Lin, Institute of Atmospheric Physics, Chinese Academy of Sciences
Haigang Zhan, South China Sea Institute of Oceanology, Chinese Academy of Sciences
Presenter Email: jfma@lasg.iap.ac.cn
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| The effects of interannual variability in chlorophyll concentrations on sea surface temperatures in the east tropical Indian Ocean (ETIO) during two positive Indian Ocean Dipole (IOD) events (in the boreal fall of 1997 and 2006) are investigated; this is done through two ocean model experiments, one with and one without the interannual variability of chlorophyll concentrations. A comparison of the two chlorophyll perturbation experiments reveals that, in contrast to the cooling effects at the seasonal timescale, increased chlorophyll concentrations during positive IOD events leads to an increase in the sea surface temperatures within the ETIO. Although upward velocity is enhanced (with a cooling effect), this does not counterbalance the increase in solar heating caused by the increased chlorophyll concentrations. This interannual variability of chlorophyll concentrations in the ETIO could reduce the amplitude of the IOD by about 6%. |
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