颶風中衛(wèi)星臭氧總柱觀測與位渦相關性和在颶風中心定位中的應用

doi:10.12306/2023jms.0083

首頁 > 過刊瀏覽>2024年第44卷第1期 >106-114. DOI:10.12306/2023jms.0083

颶風中衛(wèi)星臭氧總柱觀測與位渦相關性和在颶風中心定位中的應用
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                        10.12306/2023jms.0083
                    
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中圖分類號:P444,X515
基金項目:國家重點研發(fā)計劃資助項目(2018YFC1507004)

Correlation between satellite total column ozone observations and potential vorticity in hurricane and the application of hurricane center positioning

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本文使用搭載于極軌氣象衛(wèi)星S-NPP(Suomi National Polar-orbiting Partnership)的臭氧成像廓線儀(Ozone Mapping and Profiler Suite,OMPS)觀測的臭氧總柱(Total Column Ozone,TCO)資料對大西洋颶風"Maria"(2017)進行研究。針對對流區(qū)域TCO與氣柱平均位渦(Mean column-integrated Potential Vorticity,MPV)的低相關性構建了分區(qū)域線性回歸模型,不僅能同時提高大尺度和對流尺度上TCO和MPV的相關性,還能提高對流區(qū)域S-NPP OMPS TCO觀測資料的利用率(95.5%)。TCO觀測資料可以清晰地反映出颶風的頂部結構,據(jù)此可得到對流層頂附近的颶風中心位置。衛(wèi)星總柱臭氧資料對颶風Maria中心定位結果與最佳路徑的距離相差58.1 km,略大于使用S-NPP先進技術微波探測儀(Advanced Technology Microwave Sounder,ATMS)、MetOp-A微波濕度計(Microwave Humidity Sounder,MHS)和FY-3B微波濕度計(MWHS)亮溫觀測資料得到的Maria中心定位結果與最佳路徑的距離(47.5 km)。臭氧定位結果與垂直風切變(Vertical Wind Shear, VWS)具有一定關系,垂直風切變越強,臭氧資料定位中心偏離最佳路徑越大。本研究構建的分區(qū)域線性回歸模型可作為間接同化衛(wèi)星TCO資料的觀測算子,也可應用到渦旋初始化中,以改進颶風路徑和強度預報水平。

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Applications of Total Column Ozone (TCO) observations from the Ozone Mapping and Profiler Suite (OMPS) onboard the polar-orbiting meteorological satellite Suomi National Polar-orbiting Partnership (S-NPP) to Hurricane"Maria"(2017) were studied.To address the issue of low correlation between TCO and Mean column-integrated Potential Vorticity (MPV) in convective regions,this paper constructs two regime-dependent linear regression models.The division of TCO data into two regimes not only improves the correlation between TCO and MPV at both large-and convective scales,but increases the utilization rate (95.5%) of the S-NPP OMPS TCO data in convective regions.TCO observations can clearly reflect the top structure of hurricane,and accordingly locate the center of the hurricane near the top of the tropopause.The distance difference between the satellite ozone center and the best track for Hurricane Maria is 58.1 km,which is slightly larger than the distance (47.5 km) between the best track and the center positioning based on the brightness temperature observations from the Advanced Technology Microwave Sounder (ATMS) onboard S-NPP,the Microwave Humidity Sounder (MHS) onboard MetOp-A,and the Microwave Humidity Sounder (MWHS) onboard FY-3B.The ozone positioning results have a dependence on the Vertical Wind Shear (VWS).The stronger the VWS,the greater the deviation of the ozone data positioning center from the best track.The regime-dependent linear regression models constructed in this study can be used as an observational operator for indirectly assimilating satellite TCO observations and for vortex initialization to improve hurricane track and intensity forecasting.

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周恒,鄒曉蕾.颶風中衛(wèi)星臭氧總柱觀測與位渦相關性和在颶風中心定位中的應用.氣象科學,2024,44(1):106-114 ZHOU Heng, ZOU Xiaolei. Correlation between satellite total column ozone observations and potential vorticity in hurricane and the application of hurricane center positioning. Journal of the Meteorological Sciences,2024,44(1):106-114

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收稿日期:2023-10-14
最后修改日期:2023-12-11
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在線發(fā)布日期: 2024-03-13
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