Characteristics of intraseasonal air-sea interactions over global oceans

XI Jing-yuan; ZHOU Lei; JIANG Liang-hong

doi:10.3969/j.issn.1001-909X.2014.03.001

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Journal of Marine Sciences ›› 2014, Vol. 32 ›› Issue (3) : 1-8. DOI: 10.3969/j.issn.1001-909X.2014.03.001

Characteristics of intraseasonal air-sea interactions over global oceans

XI Jing-yuan^1,2, ZHOU Lei^*1,2, JIANG Liang-hong^1,2

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Abstract

The force and response relation between the ocean and the atmosphere is critical for the development and diagnosis of the ocean and the atmosphere general circulation models(GCMs).Based on the relationship between sea surface heat flux anomalies and sea surface temperature anomalies(SSTA), the characteristics of intraseasonal air-sea interactions were analyzed over global oceans. The results show that the atmospheric forcing dominates in the subtropics. It is significant in the summer hemisphere, but not noticeable in the winter hemisphere. From the central to the eastern tropical Pacific Ocean and in the tropical Atlantic Ocean, SST forcing dominates throughout the year. Over the Indian Ocean, the performance of air-sea interaction differs with seasons. Along the coast of Somalia, over Arabian Sea, and over the Bay of Bengal, SST forcing dominates only from June to August. Instead, from September to November, atmospheric forcing takes the place of SST forcing and dominates over the Bay of Bengal. In the areas other than the above ones, the variability of SSTA or SSTA tendency has little connection with the surface heat flux, which suggests a decoupling between the ocean and the atmosphere in the intraseasonal band. Overall, the force and response relation between the ocean and the atmosphere in the intraseasonal band changes with seasons and locations. It can also differ from the ocean-atmosphere coupling in the seasonal time scale and longer time scales.

Key words

air-sea interaction / air-sea heat flux / SSTA / global ocean / intraseasonal change

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XI Jing-yuan, ZHOU Lei, JIANG Liang-hong. Characteristics of intraseasonal air-sea interactions over global oceans[J]. Journal of Marine Sciences. 2014, 32(3): 1-8 https://doi.org/10.3969/j.issn.1001-909X.2014.03.001

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