Study of boundary layer characteristics during the landfalling of a Nisarga cyclone  

作　　者：Rani P.Pawar Prajna Priyadarshini T.Dharmaraj Dada P.Nade Mahendra N.Patil Omkar M.Patil N.Jeni Victor Sambhaji M.Pawar D.G.Kanase Sunil D.Pawar 

机构地区：[1]Indian Institute of Tropical Meteorology,Ministry of Earth Sciences,Pune,India [2]Department of Physics,Bharati Vidyapeeth’s Dr.Patangrao Kadam Mahavidyalaya(Shivaji University Kolhapur),Sangli,India [3]KSK Geomagnetic Research Laboratory,IIG,Prayagraj,Allahabad,India [4]Department of Physics,Sanjay Ghodawat University Kolhapur,India

出　　处：《Tropical Cyclone Research and Review》2024年第2期55-71,共17页热带气旋研究与评论（英文版）

摘　　要：One of the most important parameters in meteorology is the mean wind profile in the tropical cyclone boundary layer.The vertical profile of wind speed and wind direction were measured during the period of the Nisarga cyclone from May 31st,2020,to June 5th,2020,using the newly installed Phased Array Doppler Sodar system at the Center for Space and Atmospheric Science(CSAS),Sanjay Ghodawat University,Kolhapur(16.74◦N,74.37◦E;near India's western coast).Our analysis revealed that the maximum mean wind speed was 17 m/s on June 3,2020,at 10:00 IST.It also shows the change in wind direction from southwest to southeast on June 2 and 3,2020.Daily high-resolution reanalysis data in the domain,0–25◦N,65–110◦E,during the period from May 31st to June 5th,2020,revealed the variation of the atmospheric pressure of the Nisarga cyclone from 1000 to 1008 hPa,sea surface temperature(SST)between 30◦C and 31◦C,outgoing longwave radiation(OLR)between 100 and 240 Wm-2,wind speed between 3 and 15 m/s,and low values of vertical wind shear(VWS)were observed to the north of Nisarga track.These observations may provide more insights for the study of boundary layer turbulence during cyclonic activities.

关 键 词：Doppler Sodar Tropical cyclone Atmospheric boundary layer Vertical turbulence intensity 

分 类 号：P444[天文地球—大气科学及气象学]