Academic Journal of Environment & Earth Science, 2023, 5(8); doi: 10.25236/AJEE.2023.050807.
Wenyu Wang
School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China
Based on the reanalysis data of ERA5 monthly average hourly precipitation for 43 years from 1979 to 2021 provided by the European Center for Medium-Range Weather Forecasts (ECMWF), temporal and spatial distribution and periodic change of warm season precipitation and extreme precipitation in recent 43 years are studied by the methods of the linear trend estimation, empirical orthogonal function (EOF), 9 points smoothing, Mann-Kendall mutation test, Morlet wavelet analysis. The climatic characteristics of warm season precipitation in the east of Asia are discussed in detail. The results show that the average warm season precipitation in the east of Asia is uneven, and the annual fluctuation is also large in the area with more annual precipitation. The annual average precipitation and interannual fluctuation are characterized by “high in coastal areas and low in inland areas”. Expect for areas where precipitation is greatly affected by topography, the frequency of extreme precipitation decreases from coastal to inland and from low latitude to high latitude. The spatiotemporal variation characteristics of the warm season precipitation in the east of Asia reflect that the most areas of the warm season in the east of Asia had more precipitation before 2014, and the precipitation has shown a downward trend since 2015. There are three obvious mutation years (1982, 1986 and 1997) and four main precipitation cycles (4-5a, 8-9a, 13-14a and 27-28a).
Warm season precipitation, Extreme precipitation, Spatiotemporal distributiion, EOF, Wavelet analysis
Wenyu Wang. Climate Characteristics of Warm Season Precipitation in Eastern Asia in Recent 43 Years. Academic Journal of Environment & Earth Science (2023) Vol. 5 Issue 8: 61-67. https://doi.org/10.25236/AJEE.2023.050807.
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