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Spatial and temporal characteristics of annual and seasonal precipitation variation in Shijiazhuang region, north China

机译：华北石家庄地区年季节降水变化的空间与季节特征

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摘要

Understanding spatial and temporal characteristics of annual and seasonal precipitation variation is vital in watershed development and management. In this study, we investigated the spatial and temporal variation characteristics of precipitation and its structure, the correlations between precipitation and large-scale atmospheric circulations in Shijiazhuang region, North China. We used daily precipitation data from 35 meteorological stations for the period 1955-2015 across Shijiazhuang regions. The results show that the number of annual precipitation days at 73.5% of stations showed an upward trend, but the annual precipitation intensity at more than 91% of stations showed a downward trend, indicating that the annual precipitation reduction trend was mainly due to the decrease in annual precipitation intensity. Annual precipitation was negatively correlated with the East Asian Summer Monsoon Index (EASMI), and the negative correlation showed the characteristic of decreasing from north to south. Annual precipitation was positively correlated with the South Asian summer monsoon index (SASMI), and the positive correlation showed the characteristic of decreasing from southwest to northeast.
机译：了解流域开发和管理年龄和季节降水变化的空间和时间特征。在这项研究中，我们研究了沉淀的空间和时间变化特性及其结构，沉淀和大型大型大气环之间的相关性，华北地区。我们在跨石家庄地区1955 - 2015年35个气象站中使用了每日降水数据。结果表明，73.5％的年度降水日的数量表现出上升趋势，但超过91％的车站的年降水强度表明，下降趋势，表明年降水量减少趋势主要是由于减少了在年降水强度。年降水与东亚夏季季风指数（EASMI）呈负相关，负相关显示从北到南部减少的特征。年降水与南亚夏季季风指数（SASMI）正相关，阳性相关性显示出从西南到东北地区减少的特征。

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