Relationship between Northeast Cold Vortex and Cold Vortex Rainfall in Western Liaoning Region over Past 55 Years
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Abstract:
Using the monthly precipitation data of 18 observational stations in the western Liaoning region from 1961 to 2015, the monthly surface air temperature of 209 observational stations in Northeast China from 1961 to 2015, and the monthly mean sea surface temperature data reconstructed by NOAA, 88 the atmospheric circulation indexes and 26 SST indexes, a summer Northeast Clod Vortex Index (NECVI) and cold vortex rainfall predictors suitable for the western Liaoning region are defined Results show that in nearly 55 years, the cold vortex rainfall contribution rate in the western Liaoning region was stable generally; there was no obvious change; there were 18 years cycle significantly If the Northeast Cold Vortex is strong, the NECVI is greater, and the smaller SPI is often associated with more precipitation in the western Liaoning region, and vice versa There is a significantly correlation between cold vortex rainfall and previous March Nino 3 SSTA Index, May Kuroshio Current SST Index, and March Western Pacific Subtropical High Intensity Index, which can be used as influential factors of the cold vortex rainfall, and provide references for summer climate predictions and weather modification work
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.