摘要
利用 2 0 0 0年南海海 气通量观测资料 ,建立了南海季风期间海 气通量整体输送系数的计算公式 ;同时 ,利用2 0 0 0和 2 0 0 2年观测资料与邻近海区同类公式进行了对比试验研究。结果表明 ,使用邻近海区的同类公式计算的海 气通量的误差高于新建立公式所得结果。因此 ,开展南海海
and 2002 “South China Sea Air Sea Flux Measurement' project are the extension of Xisha tower air sea flux measurement which include in the South China Sea Monsoon Experiment (SCSMEX) program developed over the South China Sea (SCS) in 1998. In this paper, firstly, the bulk transfer coefficients variation feature with wind speed in unstable stratification was calculated and analyzed by means of these two air sea flux gradient measurement data before and after SCS monsoon onset. Research showed, in general , that the bulk transfer coefficients corresponded well with wind speed especially in high speed stage, but there was a little dispersion in low speed stage. The further study found that the main reason causing dispersion had relation to stratification stability and air sea temperature difference could be used to replace the stratification stability. Based on above results, the bulk transfer coefficients calculation formula being adapted to the unstability stratification atmosphere over SCS was constructed and tested. Secondly, some representative similar calculation formula of the bulk transfer coefficients, including Yan's results developed from 1998 SCSMEX data at same place and Kara's and Xu's results developed by means of west Pacific Ocean data, was chosen to compare with the formula in this paper on the basis of the model results calculated by these two observation. The analysis results showed that Yan's results had the lower value tendency because the formula was fitted by quite discrete data; and Xu's results had obvious system deviation because of different region and different season data. Kara's scheme was quite complete, which was adapted to both unstable stratification and stable stratification and also had good representative because ten years observation data in west Pacific Ocean including deep and shallow sea was used to examined it's accuracy. But when it was used in SCS, the estimate flux value would be lower in low speed stage but higher in high speed stage although the system deviation is quite small. The results using the formula developed in this paper was the best. Use blindly formula developed from other sea area data would cause big computation error. Finally, based on above conclusion and taking into consideration of incomplete formula developed in this paper, It's suggested that the SCS air sea flux measurement should be continued in the future in order to develop the complete bulk transfer coefficient computation formula to adapt to SCS area.
出处
《气象学报》
CAS
CSCD
北大核心
2004年第3期338-346,共9页
Acta Meteorologica Sinica
基金
NSFC重点基金 40 13 60 10项目
国家自然科学基金 90 2 110 11与 40 0 75 0 0 3项目联合赞助
关键词
夏季风
海-气通量
整体输送系数
南海
South China Sea monsoon, Air-sea fluxes, Bulk transfer coefficients.
