ESTIMATES OF SEA SURFACE FLUXES DURING TOGA-COARE IOP  

作　　者：姚华栋 李骥 丁一汇 

机构地区：[1]National Climate Center,Beijing 100081

出　　处：《Acta meteorologica Sinica》1996年第2期175-192,共18页

摘　　要：With the marine ship observation data set obtained by three cruise-phases of Chinese Xi- angyanghong 5 from November 5,1992 to February 19,1993 in the TOGA-COARE IOP at 2°S, 156°E.the sea surface fluxes at this point are estimated by three different bulk schemes.Firstly.a quasi-linear relation is found between the neutral drag coefficients and wind speed.Then,the sta- bility-dependent drag and heat transfer coefficients are solved in the iterative method.Based on thus-derived transfer coefficients,the momentum,sensible and latent heat fluxes are calculated. In the warm pool region,the fluxes corresponding to the westeily winds are much greater than those of the easterly trade winds.The magnitude of sea surface fluxes depends upon the atmo- spheric stability as well,in particular in the case of weak wind condition.The estimated sea sur- face net heat budget shows that considerable amount of heat transport from ocean to atmosphere is mainly produced by the effective longwave radiation,latent and sensible heat fluxes.Among them the value of latent heat flux is the largest and the sensible heat flux is the smallest.Finally,an ac- curacy analysis is made by direct measurements with the eddy-correlation method on the Japanese R/V Hakuho board at the same time.It is shown that the bulk-derived fluxes are acceptable with much confidence.The estimated effective longwave radiation is used to compare with those by di- rect observations on Xiangyanghong 5.This research is compared with TOGA investigation in the tropical western Pacific.With the marine ship observation data set obtained by three cruise-phases of Chinese Xi- angyanghong 5 from November 5,1992 to February 19,1993 in the TOGA-COARE IOP at 2°S, 156°E.the sea surface fluxes at this point are estimated by three different bulk schemes.Firstly.a quasi-linear relation is found between the neutral drag coefficients and wind speed.Then,the sta- bility-dependent drag and heat transfer coefficients are solved in the iterative method.Based on thus-derived transfer coefficients,the momentum,sensible and latent heat fluxes are calculated. In the warm pool region,the fluxes corresponding to the westeily winds are much greater than those of the easterly trade winds.The magnitude of sea surface fluxes depends upon the atmo- spheric stability as well,in particular in the case of weak wind condition.The estimated sea sur- face net heat budget shows that considerable amount of heat transport from ocean to atmosphere is mainly produced by the effective longwave radiation,latent and sensible heat fluxes.Among them the value of latent heat flux is the largest and the sensible heat flux is the smallest.Finally,an ac- curacy analysis is made by direct measurements with the eddy-correlation method on the Japanese R/V Hakuho board at the same time.It is shown that the bulk-derived fluxes are acceptable with much confidence.The estimated effective longwave radiation is used to compare with those by di- rect observations on Xiangyanghong 5.This research is compared with TOGA investigation in the tropical western Pacific.

关 键 词：sea surface momentum sensible and latent fluxes TOGA-COARE IOP 

分 类 号：P731[天文地球—海洋科学]