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Temperature changes before and after precipitation in Mongolia

机译：蒙古降水前后的温度变化

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Drastic temperature decreases after precipitation events in the cold season in Mongolia can harm livestock, often leading to high stock mortality. We investigated seasonal and regional temperature changes before and after precipitation in Mongolia. We conducted a time-series analysis of changes of temperature relative to daily mean temperature at 25 weather stations before, on, and after days of precipitation. We categorized the relative temperature time series into three types: peak shaped (P), valley shaped (V), and gradually decreasing (D), which characterized spring-summer, winter, and autumn, respectively. We produced 11-day time series of relative temperature centered on precipitation days for each precipitation event at each station from 1961 to 2007 and applied principal component analysis to the relative temperature time series. Our results show that the first principle component (PC1) pattern is V-shaped, and the principal component analysis scores tended to be negative in winter and positive in spring. The PC2 pattern was closely related to the D-shaped trend of relative temperature, and the scores were positive from autumn to early winter and negative from spring to summer. Synoptic weather pattern analysis before and after precipitation days showed that, in general, both the P- and V-shaped trends accompanied the passage of a cold front; whether were patterns are P- or V-shaped was determined by the thermal conditions of the background air mass into which the contrasting air mass invaded to produce a precipitation-bearing front.
机译：蒙古在寒冷季节出现降水事件后，温度急剧下降，可能会危害牲畜，往往导致高牲畜死亡率。我们调查了蒙古降水前后的季节和区域温度变化。我们对25个气象站在降水前后，前后的温度相对于每日平均温度的时间变化进行了时间序列分析。我们将相对温度时间序列分为三种类型：峰形（P），谷形（V）和逐渐减小（D），分别表示春季，夏季和秋季。我们针对1961年至2007年每个站点的每个降水事件，以降水天数为中心，绘制了11天相对温度时间序列，并将主成分分析应用于相对温度时间序列。我们的结果表明，第一主成分（PC1）模式为V形，并且主成分分析得分在冬季呈负向，在春季呈正向。 PC2模式与相对温度的D形趋势密切相关，从秋季到初冬得分为正，从春季到夏季得分为负。降水前后前后的天气天气模式分析表明，总体而言，P型和V型趋势都伴随着冷锋的通过。图案是P形还是V形由背景空气团的热条件决定，对比空气团侵入该环境以产生带有沉淀的锋面。

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