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Opposite Trends in Light Rain Days over Western and Eastern China from 1960 to 2014

机译：1960年至2014年中国西部和东部小雨天的相反趋势

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In this work, we examined spatial and temporal trends for light rain days based on daily precipitation measurements, obtained from 1960 to 2014, from 590 meteorological stations in China. For the analyzed time interval, light rain days over eastern China were determined to decrease by 0.23 days·year ?1 . In western China, they increased by 0.3 days·year ?1 . To detect underlying causes for changes in light rain days, lower-tropospheric relative humidity was set as a proxy for light rain days. We then calculated the respective impacts of lower-tropospheric temperature and specific humidity on changes in light rain days. A comparison of the contributions of temperature and specific humidity resulted in the identification of the main cause of changes. Our results indicated that increases in lower-tropospheric temperatures reduced light rain days over the entire country, while variations in specific humidity dominated regional differences for light rain day trends.
机译：在这项工作中，我们根据1960年至2014年从中国590个气象站获得的每日降水量数据，检验了小雨日的时空趋势。对于所分析的时间间隔，确定中国东部的小雨天减少了0.23天·年？1。在中国西部，它们增加了0.3天·年1。为了检测到小雨天变化的根本原因，将对流层相对湿度设置为小雨天的代理。然后，我们计算了低对流层温度和比湿度对小雨天变化的各自影响。通过比较温度和比湿度的贡献，可以确定变化的主要原因。我们的结果表明，对流层较低温度的升高减少了整个国家的小雨天，而特定湿度的变化主导了小雨天趋势的区域差异。

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