The impact of tropical cyclones on extreme precipitation over coastal and inland areas of China and its association to the ENSO

The impact of tropical cyclones on extreme precipitation over coastal and inland areas of China... AbstractThe coastal part of China and its surrounding regions are dominated by highly-dense population and highly-developed economy. Extreme precipitation events (EPEs) cause a lot of damage and hence, changes in these events and their causes have been drawing considerable attention. This study investigated EPEs resulting from Western North Pacific (WNP) Tropical Cyclones (TCs) and their potential link to El Niño-Southern Oscillation (ENSO), using TC track data, daily precipitation data from 2313 stations for 1951-2014, and NCAR/NCEP reanalysis dataset. Two types of EPEs were considered: EPEs within 500 km from the TC center; and those caused by the mesoscale and synoptic system called as the Predecessor Rain Events (PREs) beyond 1000 km from the TC center. Results indicated significant impacts of TCs on EPEs along the coastal areas, and discernable effects in inland areas of China. However, the effect of TCs on EPEs tended to be modulated by ENSO. During neutral years, inland areas of China are more affected by TC-induced extreme precipitation than during El Niño or La Niña years with the highest density of TC tracks and the larger-than-average numbers of tropical storms, typhoons and landfalling TCs. During the El Niño phase, the central and eastern equatorial Pacific was characterized by higher sea surface temperature (SST), greater low-level vorticity (1000hPa) and upper-level divergence (250hPa), and stronger prevailing westerlies, which combined to trigger the movement of mean genesis to the eastern/southeastern WNP, and hence fewer TCs passing through the Chinese territory. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Climate American Meteorological Society

The impact of tropical cyclones on extreme precipitation over coastal and inland areas of China and its association to the ENSO

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0442
D.O.I.
10.1175/JCLI-D-17-0474.1
Publisher site
See Article on Publisher Site

Abstract

AbstractThe coastal part of China and its surrounding regions are dominated by highly-dense population and highly-developed economy. Extreme precipitation events (EPEs) cause a lot of damage and hence, changes in these events and their causes have been drawing considerable attention. This study investigated EPEs resulting from Western North Pacific (WNP) Tropical Cyclones (TCs) and their potential link to El Niño-Southern Oscillation (ENSO), using TC track data, daily precipitation data from 2313 stations for 1951-2014, and NCAR/NCEP reanalysis dataset. Two types of EPEs were considered: EPEs within 500 km from the TC center; and those caused by the mesoscale and synoptic system called as the Predecessor Rain Events (PREs) beyond 1000 km from the TC center. Results indicated significant impacts of TCs on EPEs along the coastal areas, and discernable effects in inland areas of China. However, the effect of TCs on EPEs tended to be modulated by ENSO. During neutral years, inland areas of China are more affected by TC-induced extreme precipitation than during El Niño or La Niña years with the highest density of TC tracks and the larger-than-average numbers of tropical storms, typhoons and landfalling TCs. During the El Niño phase, the central and eastern equatorial Pacific was characterized by higher sea surface temperature (SST), greater low-level vorticity (1000hPa) and upper-level divergence (250hPa), and stronger prevailing westerlies, which combined to trigger the movement of mean genesis to the eastern/southeastern WNP, and hence fewer TCs passing through the Chinese territory.

Journal

Journal of ClimateAmerican Meteorological Society

Published: Dec 11, 2017

References

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