Extreme air-sea turbulent fluxes during tropical cyclone Barijat observed by a newly designed drifting buoy  

作　　者：Xuehan Xie Zexun Wei Bin Wang Zhaohui Chen Marilena Oltmanns Xiangzhou Song 

机构地区：[1]Key Laboratory of Marine Hazards Forecasting,Ministry of Natural Resources,Hohai University,Nanjing 210098,China [2]College of Oceanography,Hohai University,Nanjing 210098,China [3]First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China [4]National Ocean Technology Center,Ministry of Natural Resources,Tianjin 300112,China [5]Physical Oceanography Laboratory,Ocean University of China,Qingdao 266100,China [6]Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China [7]National Oceanography Centre,Southampton SO143ZH,United Kingdom

出　　处：《Fundamental Research》2024年第5期1225-1234,共10页自然科学基础研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(42122040 and 42076016).

摘　　要：Using in situ observations collected by a drifting air-sea interface buoy(DrIB)in the northern South China Sea from August 30 to September 13,2018,the extreme air-sea turbulent fluxes that occurred from September 8 to 13 during tropical cyclone(TC)Barijat were investigated.The most striking features were substantial increases in momentum and heat fluxes,with maximum increases of 10.8 m s−1 in the wind speed(WS),0.73 N m^(-2)in the wind stress,68.1 W m^(-2)in the sensible heat fluxes(SH)and 258.8 W m^(-2)in the latent heat fluxes(LH).The maximum WS,wind stress,SH and LH values amounted to 15.3 m s−1,0.8 N m^(-2),70.9 W m^(-2)and 329.9 W m^(-2),respectively.Using these new DrIB observations,the performance of two state-of-the-art,high-resolution reanalysis products,ERA5 and MERRA2,was assessed.The consistency of the observed values with ERA5 was slightly better than with MERRA2,reflected in higher correlations but both products underestimated the WS during TC conditions.In calm weather conditions,the turbulent heat fluxes were overestimated,because they simulated a too dry and cold atmospheric state,enhancing the air-sea differences in temperature and humidity.Considering that an accurate representation of the air-sea turbulent and momentum fluxes is essential for understanding and predicting ocean and atmospheric variability,our findings indicate that more high-quality temperature and relative humidity observations are required to evaluate and improve existing reanalysis products.

关 键 词：Tropical cyclonesA ir–sea interaction Air–sea turbulent fluxes Drifting buoy DrIB observations 

分 类 号：P73[天文地球—海洋科学]