Possible Causes for Spatial and Temporal Variation of Warm Season Precipitation in Xinjiang from 1960–2014

Abstract

Abstract:In this work, rain totals from 1960-2014, obtained during the warm season (May to October) from 52 meteorological stations, over Xinjiang, China were classified as either light, moderate, or heavy rain in two sub-regions (northern and southern). Spatial and temporal trends for rain amounts and days for the three rain classes were determined. All light, moderate, and heavy rain amounts displayed increasing trends over the two sub-regions. Furthermore, heavy rain amounts contributed the most to changes in total rain amounts. Light rain days in northern Xinjiang significantly decreased, in contrast to increasing light rain days in southern Xinjiang and moderate and heavy rain days within two sub-regions. Results obtained from correlation and relative weights analyses implied that lower-tropospheric specific humidity was the main factor responsible for light rain day trends in Xinjiang. Increasing temperatures were not found to have a significant effect.

Impacts of Anthropogenic Heat and Building Height on Urban Precipitation Over the Seoul Metropolitan area in Regional Climate Modeling

“…As the AH increased, most of the precipitation intensities increased nonlinearly in all quantiles, especially in the upper quantiles. To understand the changes in precipitation frequency, the daily precipitation was analyzed in five groups following the method in Song et al (2017): light (0.1-10 mm), moderate (10-25 mm), heavy (25-50 mm), storm (50-100 mm), and downpour (>100 mm). With added AH, the frequency of light precipitation decreased, while that of the other groups except the downpour tended to increase.…”

Contribution of the Precipitation‐Recycling Process to the Wetting Trend in Xinjiang, China

“…The regional mean evapotranspiration in Xinjiang shows a significant increasing trend of 6.06 mm decade −1 . This increased evapotranspiration causes the specific humidity to increase in the lower troposphere, a crucial source of precipitable water that has a direct effect on increased light precipitation (Song et al., 2017). Moreover, increased evapotranspiration could raise the convective available potential energy, thereby generating increased convective clouds and precipitation (Yao, Chen, Yu, et al., 2020).…”