Land-sea breeze circulation structure on the west coast of the Yellow Sea,China  

中国黄海西岸海陆风循环结构研究

作　　者：Yongxiang Ma Jinyuan Xin Xiaoling Zhang Lindong Dai Klaus Schaefer Shigong Wang Yuesi Wang Zifa Wang Fangkun Wu Xinrui Wu Guangzhou Fan Yongxiang Ma;Jinyuan Xin;Xiaoling Zhang;Lindong Dai;Klaus Schaefer;Shigong Wang;Yuesi Wang;Zifa Wang;Fangkun Wu;Xinrui Wu;Guangzhou Fan(Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu,China;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing,China)

机构地区：[1]Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu,China [2]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,China [3]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing,China

出　　处：《Atmospheric and Oceanic Science Letters》2021年第1期14-21,共8页大气和海洋科学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China[Grant number 2016YFC0202001];the Chinese Academy of Sciences Strategic Priority Research Program[Grant number XDA23020301];the National Natural Science Foundation of China[Grant number 41375036]。

摘　　要：Land-sea breeze(LSB)is an atmospheric mesoscale circulation that occurs in the vicinity of the coast and is caused by uneven heating resulting from the difference in specific heat capacity between the sea and land surfaces.The circulation structure of LSB was quantitatively investigated with a Doppler wind lidar Windcube100s on the west coast of the Yellow Sea for the first time.The time of observation was 31 August to 28 September 2018.It was found that the height of LSB development was 700 m to 1300 m.The duration of conversion of LSB was between 6 h and 8 h.The biggest average horizontal sea-breeze wind speed at 425 m was 5.6 m s^(-1),and at 375 m it was 4.5 m s^(-1).During the conversion process from sea breeze to land breeze,the maximum wind shear exponent was 2.84 at 1300 m altitude.During the conversion process from land breeze to sea breeze,the maximum wind shear exponent was 1.28 at 700 m altitude.The differences in wind shear exponents between sea-breeze and landbreeze systems were between 0.2 and 3.6 at the same altitude.The maximum value of the wind shear exponent can reflect the height of LSB development.陆海风是由于海陆表面之间的比热容不同而导致的昼夜热量分布差异,从而在海岸附近引发的大气中尺度循环系统.本文利用多普勒风激光雷达Windcube100s首次对黄海西海岸的海陆风的循环结构进行了观测研究.在2018年8月31日至9月28日观测期间发现,海陆风发展高度一般在700 m至1300 m.海陆风转化持续的时间为6小时至8小时.在425m高度,海风水平风速出现最大值,平均为5.6 m s^(-1).陆风最大水平风速出现在370 m,约为4.5 ms^(-1).最大风切变指数在1300m处,为2.84;在陆风向海风转换过程中,最大风切变指数在700m处,为1.28.在同一高度上,风切变指数在海风盛行和陆风盛行时的差值范围为0.2-3.6,风切变能反映出海陆风的发展高度.

关 键 词：Land-sea breeze Vertical wind speed CCirculation structure Doppler wind lidar Yellow sea 

分 类 号：P425[天文地球—大气科学及气象学]