TY - JOUR
T1 - Relative Roles of Low-Level Wind Speed and Moisture in the Diurnal Cycle of Rainfall Over a Tropical Island Under Monsoonal Flows
AU - Zhu, Lei
AU - Chen, Xingchao
AU - Bai, Lanqiang
N1 - Funding Information:
L. Zhu and L. Bai are supported by the National Natural Science Foundation of China (Grant No. 41905096 and 41905043) and the Joint Open Project of KLME & CIC-FEMD, NUIST (Grant No. KLME201904); L. Zhu is also supported by National Key R& D Program of China (2017YFC1502000) and a start-up grant from NUIST; X. Chen is supported by the Office of Science of DOE Biological and Environmental Research as part of the Regional and Global Modeling and Analysis program. The data process and analysis are performed on the Stampede supercomputer of the Texas Advanced Computing Center (TACC). CMORPH data were retrieved (https://ftp.cpc.ncep.noaa.gov/precip/CMORPH_V1.0/CRT/8km-30min/) and ERA5 from the Copernicus Climate Change Service Climate Data Store (https://cds.climate.copernicus.eu/).
Funding Information:
L. Zhu and L. Bai are supported by the National Natural Science Foundation of China (Grant No. 41905096 and 41905043) and the Joint Open Project of KLME & CIC‐FEMD, NUIST (Grant No. KLME201904); L. Zhu is also supported by National Key R& D Program of China (2017YFC1502000) and a start‐up grant from NUIST; X. Chen is supported by the Office of Science of DOE Biological and Environmental Research as part of the Regional and Global Modeling and Analysis program. The data process and analysis are performed on the Stampede supercomputer of the Texas Advanced Computing Center (TACC). CMORPH data were retrieved ( https://ftp.cpc.ncep.noaa.gov/precip/CMORPH_V1.0/CRT/8km‐30min/ ) and ERA5 from the Copernicus Climate Change Service Climate Data Store ( https://cds.climate.copernicus.eu/ ).
Publisher Copyright:
© 2020. American Geophysical Union. All Rights Reserved.
PY - 2020/4/28
Y1 - 2020/4/28
N2 - Using satellite observations and reanalysis data, this study investigates the relative roles of low-level wind speed and moisture content in the rainfall diurnal cycle over a tropical island influenced by monsoonal winds. Results show that the spatiotemporal characteristics of rainfall over the island are evidently influenced by the two factors. Specifically, the spatial distribution of rainfall is primarily determined by the low-level wind speeds, while the rainfall diurnal cycle is influenced by both factors. Weaker low-level wind speed leads to stronger and wider inland convergence and afternoon precipitation, which are mainly produced by the inland penetrating sea breeze fronts. Nighttime rainfall over the island is closely related to the inertial oscillation. Stronger nocturnal rainfall can be found with higher low-level moisture content and stronger monsoonal winds. The multiscale interactions between the large-scale circulation, land–sea breezes, and inertial oscillation play essential roles in modulating the rainfall over this tropical island.
AB - Using satellite observations and reanalysis data, this study investigates the relative roles of low-level wind speed and moisture content in the rainfall diurnal cycle over a tropical island influenced by monsoonal winds. Results show that the spatiotemporal characteristics of rainfall over the island are evidently influenced by the two factors. Specifically, the spatial distribution of rainfall is primarily determined by the low-level wind speeds, while the rainfall diurnal cycle is influenced by both factors. Weaker low-level wind speed leads to stronger and wider inland convergence and afternoon precipitation, which are mainly produced by the inland penetrating sea breeze fronts. Nighttime rainfall over the island is closely related to the inertial oscillation. Stronger nocturnal rainfall can be found with higher low-level moisture content and stronger monsoonal winds. The multiscale interactions between the large-scale circulation, land–sea breezes, and inertial oscillation play essential roles in modulating the rainfall over this tropical island.
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U2 - 10.1029/2020GL087467
DO - 10.1029/2020GL087467
M3 - Article
AN - SCOPUS:85084007591
SN - 0094-8276
VL - 47
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 8
M1 - e2020GL087467
ER -