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Zhaohua WANG, Dongliang ZHAO, Kejian WU, Lian XIE. Influence of Qinghai-Xizang Plateau snow cover on interannual variability of Western North Pacific tropical cyclone tracks[J]. Journal of Oceanology and Limnology, 2023, 41(6): 2060-2076

Influence of Qinghai-Xizang Plateau snow cover on interannual variability of Western North Pacific tropical cyclone tracks

Zhaohua WANG1, Dongliang ZHAO1, Kejian WU1, Lian XIE2
1 Ocean University of China, Qingdao 266100, China;
2 Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Box 8208, Raleigh, NC 27695, USA
Track density function (TDF) was computed for all Western North Pacific tropical cyclones (WNP TCs) tracks from 1950 to 2018, and the TDFs were further investigated using principal component analysis (PCA) to analyze their inter-annual spatial and temporal variability. Then, the relationships between each empirical orthogonal function (EOF) mode and the typhoon count, typhoon landfall count, track pattern, and the Qinghai-Xizang Plateau snow cover (QXPSC) were examined, and the possible physical mechanisms implied by the statistical relationship were explored. The results show the QXPSC significantly affected the surface-atmosphere heat exchange through snow cover (SC) level, then changed the East Asian summer monsoon regional circulation pattern, influenced the subtropical high-pressure system strength and location, and ultimately affected the WNP TCs track patterns and thus changed their landfall locations.
Key words:    tropical cyclone|Qinghai-Xizang Plateau snow cover|track pattern|landfall location   
Received: 2022-11-03   Revised:
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