Mixed layer heat budget in Bay of Bengal： Mechanism of the generation and decay of spring warm pool

LIU Yanliang; YU Weidong; LI Kuiping; LI Zhi; WANG Huiwu; GAO Libao

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LIU Yanliang, YU Weidong, LI Kuiping, LI Zhi, WANG Huiwu, GAO Libao. Mixed layer heat budget in Bay of Bengal： Mechanism of the generation and decay of spring warm pool[J]. Haiyang Xuebao, 2013, 35(6): 1-8.

Citation:

LIU Yanliang, YU Weidong, LI Kuiping, LI Zhi, WANG Huiwu, GAO Libao. Mixed layer heat budget in Bay of Bengal： Mechanism of the generation and decay of spring warm pool[J]. Haiyang Xuebao, 2013, 35(6): 1-8.

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Mixed layer heat budget in Bay of Bengal： Mechanism of the generation and decay of spring warm pool

First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Center for Ocean and Climate Research, State Oceanic Administration, Qingdao 266061, China

Received Date: 2012-02-04

Abstract

Abstract

A spring warm pool appeared before the summer monsoon onset in Bay of Bengal (BOB), and disappeared rapidly after the monsoon onset. The RAMA buoy data in central BOB were used to study seasonal warm pool process by diagnosing the heat budget of mixed layer in BOB. The study showed: The Net surface heat flux dominated both generation and decay phase of the spring warm pool, which performed a strong heating effect in generation phase and a strong cooling effect in decay phase. Advection of temperature only played an important role only in winter time when the entrainment effect became strong during the warming period. Analysis on heat flux term showed: The heating effect of solar radiation was the main determining factor of the behalf of net surface heat flux, which was high to 0.32℃/d in generation phase. The cooling effect of latent heat flux was not varied much, which was about -1.4℃/d all the time. The cooling effect of long wave radiation slowed down the speed of temperature increase in generation phase. The sensible heat flux played a negligible role all the time.
- Bay of Bengal,
- heat flux,
- mixed layer depth,
- warm pool

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