Spatiotemporal Profiling of Tropical Cyclones Genesis and Favorable Environmental Conditions in the Western Pacific Basin

Lu, Mengqian1; Xiong, Rui1,2

2019-10-29

10.1029/2019GL084995

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

We analyze the spatiotemporal variations of tropical cyclone (TC) genesis and associated environmental conditions over the western North Pacific with a series of data science techniques, including Gaussian kernel estimator, wavelet, cross-wavelet coherence, and regression analyses. There are significant semiannual and annual variations of TC genesis over the northern South China Sea and oceanic areas east of the Philippines. Variations on the El Nino-Southern Oscillation timescale are prominent between 5-10 degrees N, 155-160 degrees E. With reconstructed TC series on those frequencies, we further quantify the influences of environmental variables on the primary TC signals over western North Pacific. Over northern South China Sea and oceanic areas east of the Philippines, 40% of the reconstructed TC variance can be explained by vertical shear of zonal wind, relative humidity, and absolute vorticity. The reconstructed TC series near (160 degrees E, 7 degrees N) has strong but varying in-phase relationships with El Nino-Southern Oscillation, which provides deeper insight into their nonstationary and nonlinear relations than their modest correlation.

Tropical Cyclones Western PacificWithin-Basin Spatiotemporal Variations Wavelet & Coherence Analysis ENSO

SCI ; EI

英语

NI论文

其他

Hong Kong Research Grants Council[26200017] ; Hong Kong Research Grants Council[16201218]

Geology

Geosciences, Multidisciplinary

WOS:000493036900001

AMER GEOPHYSICAL UNION

20194607681977

Atmospheric pressure ; Climatology ; Hurricanes ; Regression analysis ; Tropics

Meteorology:443 ; Mathematical Statistics:922.2

GEOSCIENCES

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen Municipal Engn Lab Environm IoT Technol, Shenzhen, Peoples R China

Lu, Mengqian,Xiong, Rui. Spatiotemporal Profiling of Tropical Cyclones Genesis and Favorable Environmental Conditions in the Western Pacific Basin[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(20):11548-11558.

Lu, Mengqian,&Xiong, Rui.(2019).Spatiotemporal Profiling of Tropical Cyclones Genesis and Favorable Environmental Conditions in the Western Pacific Basin.GEOPHYSICAL RESEARCH LETTERS,46(20),11548-11558.

Lu, Mengqian,et al."Spatiotemporal Profiling of Tropical Cyclones Genesis and Favorable Environmental Conditions in the Western Pacific Basin".GEOPHYSICAL RESEARCH LETTERS 46.20(2019):11548-11558.