同化海温观测数据研究波浪破碎对海洋上层结构的影响 *

doi:10.11978/j.issn.1009-5470.2011.05.048

Abstract

Abstract: Sensitivity of sea surface temperature (SST) to wave energy factor a and Charnock parameter b is discussed using Mellor-Yamada 2.5 turbulence closure model in which wave breaking is considered. The upper-ocean temperature data in summer from OWS Station Papa is assimilated to estimate a and b via a variational approach optimally. It shows that the cost function reaches minimum when a =167 and b =4.1×10⁵. Both monthly and daily SSTs at OWS Station Papa can be successfully reconstructed with the optimal a and b , and the simulated temperature and depth of surface mixed layer are also consistent with the observation. The equation of turbulent kinetic energy is diagnosed utilizing the optimal parameters, from which the effect of wave breaking on the turbulent energy budget is revealed.

Key words: sea surface roughness, wave energy factor, assimilation, wave breaking

CLC Number:

P731

ZHANG Xue-feng,HAN Gui-jun,WU Xin-rong,LI Wei,WANG Dong-xiao . Effect of surface wave breaking on upper-ocean structure revealed by assimilating sea temperature data[J].Journal of Tropical Oceanography, 2011, 30(5): 48-54.

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Effect of surface wave breaking on upper-ocean structure revealed by assimilating sea temperature data

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