Observation of Low-Level Jets in the Eastern Tropical Indian Ocean Based on Shipborne Coherent Doppler Lidar  

作　　者：WANG Haiyuan LIU Lin FAN Mengqi YANG Yang YANG Guang DUAN Yongliang LIU Baochao SU Qinglei ZHANG Binbin WANG Fengjun SHI Xuliang LI Qiuchi ZENG Ai 

机构地区：[1]First Institute of Oceanography,Ministry of Natural Resources and Laboratory for Regional Oceanography and Numerical Modeling,Qingdao Marine Science and Technology Center,Qingdao 266061,China [2]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China [3]Key Laboratory of Marine Science and Numerical Modeling,Ministry of Natural Resources,Qingdao 266061,China [4]Qingdao Leice Transient Technology Co.,Ltd.,Qingdao 266100,China [5]Qingdao Innovation and Development Base of Harbin Engineering University,Qingdao 266404,China

出　　处：《Journal of Ocean University of China》2024年第5期1163-1172,共10页中国海洋大学学报（英文版）

基　　金：supported by the Taishan Scholars Programs of Shandong Province(No.tsqn201909165);the Global Change and Air-Sea Interaction Program(Nos.GASI-04-QYQH-03,GASI-01-WIND-STwin);the National Natural Science Foundation of China(Nos.41876028,42349910).

摘　　要：In contrast to the Pacific and Atlantic Oceans,the Indian Ocean has lacked in-situ observations of wind profiles over open sea areas for decades.In 2021,a shipborne coherent Doppler lidar(CDL)was used to observe in-situ wind profiles in the eastern tropical Indian Ocean.This equipment successfully captured low-level jets(LLJs)in the region,and their characteristics were thoroughly analyzed.Results reveal that the observed wind speed of LLJs in the eastern Indian Ocean ranges from 6 m s^(-1) to 10 m s^(-1) during the boreal winter and spring seasons,showing a height range of 0.6 to 1 km and two peak times at 0800 and 2000 UTC.This wind shear is weaker than that in land or offshore areas,ranging from 0 s^(-1) to 0.006 s^(-1).Moreover,the accuracy of the CDL data is compared to that of ERA5 data in the study area.The results indicate that the zonal wind from ERA5 data significantly deviated from the CDL measurement data,and the overall ERA5 data are substantially weaker than the in-situ observations.Notably,ERA5 underestimates northwestward LLJs.

关 键 词：low-level jets coherent Doppler lidar ERA5 RADIOSONDE eastern Indian Ocean 

分 类 号：P714.2[天文地球—海洋科学]