海洋科学2024，Vol.48Issue(3)：13-25,13.DOI:10.11759/hykx20230427001
涌浪对大气边界层风廓线的影响
Influence of swell on the wind profile in atmospheric boundary layer
摘要
Abstract
Previous studies have shown that the Monin-Obukhov similarity theory(MOST)in the atmospheric boundary layer near the sea surface becomes invalid when a swell occurs,and the establishment of wind profile models needs to consider the influence of wave-induced stress.Based on this observation,this article first studied the wind profiles generated using the Ekman and constant flux layer models,which include the influence of swells.The results indicate that the wind profiles estimated by both models show a high dependence on the wave decay rate coefficient cβ of a swell.When cβ<-50,both the wind profiles show maximum wind speeds near the sea surface;however,the influence of Coriolis force on the wind profile near the sea surface can be ignored.Under various at-mospheric stratification conditions,the analysis shows that the wind speed in the wave boundary layer(the area directly affected by waves)was significantly lower than the extrapolated value of the MOST profile above the wave boundary layer at the same height,reflecting the obvious shear enhancement caused by swells.On comparing and analyzing the measured data from offshore observation platforms near Maoming City,Guangdong Province,it was found that in the presence of a swell,MOST is generally unable to describe wind profiles.Statistical analysis shows that the wind speed estimated by the constant flux layer model at 8 m is highly consistent with the measured data.Considering that previous studies have been limited to neutral atmospheric stratification conditions and that swells often significantly affect low and medium wind speed conditions with an obvious buoyancy effect,our research will help explain the impact of swells on wind profiles under various atmospheric conditions.关键词
MOST/涌浪/波致应力/海浪边界层/层结Key words
MOST/swell/wave-induced stress/wave boundary layer/stratification分类
海洋科学引用本文复制引用
张昱昊,宋金宝,刘长龙..涌浪对大气边界层风廓线的影响[J].海洋科学,2024,48(3):13-25,13.基金项目
国家自然科学基金项目(41830533) National Natural Science Foundation of China,No.41830533 （41830533）
