摘要
本文研究了热带和中纬度一些海表面温度年变化较强的区域中海洋对大气加热场的年度化特征。结果表明海洋向大气提供热通量的强度在冷海区呈年周期性变化,而在暖海区呈半年周期性变化。与潜热的湍流输送及海表面向上的长波辐射通量相比,感热的湍流输送量很小。在暖海区潜热输送总大于长波辐射,并且前者有较强的年变化而后者较弱;在冷海区二者的量级相当,年变化幅度也相当。海表风场和云的变化对海洋对大气加热场年变化的影响非常重要。
In this work , the regional characteristics of the annual variations of the heat fluxes released from the ocean to the atmosphere in some tropical and mid-latitude regions are revealed . The climatic mean value of the fluxes appears to vary with annual cycle over low SST regions while with semi-annual cycle over high SST re- gions. Comparing with the flux of turbulent exchange of latent heat and the flux of upward long-wave radiation the flux of sensible heat exchange is very small. Over the high SST regions the value of the latent heat flux is larger and varies with larger amplitudes than that of upward longwave radiations. By contrast, over the low SST regions the two quantities are of similar magnitude and same importance in terms of contribution to the variations of the total heat flux from ocean to atmosphere. While the SST providing a background surface condition , both surface wind and cloud cover play important roles in determining the intensity of the heat flux and its variabilities.
出处
《大气科学》
CSCD
北大核心
1991年第6期26-35,共10页
Chinese Journal of Atmospheric Sciences
关键词
海洋
大气
加热场
区域性
年变化
Air-sea heat budget
Regional characteristics
Annual variabilities.
