文章摘要
郭军,熊明明,黄鹤.京津冀地区暖季降水日变化特征分析[J].海洋气象学报,2019,39(2):58-67
京津冀地区暖季降水日变化特征分析
Analysis of diurnal variation characteristics of rainfall during warm season in Beijing-Tianjin-Hebei region
投稿时间:2018-12-10  修订日期:2019-01-13
DOI:10.19513/j.cnki.issn2096-3599.2019.02.006
中文关键词: 暖季降水  降水持续性  日变化  季节内变化  京津冀
英文关键词: precipitation during warm season  persistent precipitation  diurnal variation  intra-seasonal variation  Beijing-Tianjin-Hebei region
基金项目:国家重点研发计划项目(2018YFA0606302)
作者单位
郭军,熊明明,黄鹤 天津市气候中心天津 300074 
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中文摘要:
      使用2007—2017年京津冀地区156个气象站暖季(5—9月)逐小时降水观测数据,根据地形将研究区域分为6个分区,分析各分区降水量季节内变化和日变化特征,结果表明:1)京津冀的多雨区主要位于沿燕山南麓到太行山,存在多个降雨中心。2)各分区降水量季节内特征总体表现为单峰型,即7月降水量最大,7月第3候至8月第4候是主汛期,8月降水量次之,5月最少。3)降水呈夜间多,白天少的特点,7月初之前的前汛期降水多发生在16—21时;主汛期降水呈双峰型,峰值在17—22时,次峰值出现在00—07时;8月中旬以后的后汛期多夜间降水,峰值多出现在00—08时。4)高原山区多短历时降水,长历时累计降水对季节降水贡献率大值区位于平原地区,而持续性降水贡献率大值位于太行山区和燕山迎风坡的西部。
英文摘要:
      Based on the hourly precipitation observation data of 156 meteorological stations in Beijing-Tianjin-Hebei region during the warm season (from May to September) from 2007 to 2017, this paper divides the study area into six zones according to the topography, and analyzes the intra-seasonal and diurnal variation characteristics of precipitation in each zone. The results are listed as below. 1) The rainy areas in Beijing-Tianjin-Hebei region are mainly located along the southern foot of Yanshan Mountains to Taihang Mountains with multiple rain field centers. 2) The intra-seasonal characteristics of precipitation in each zone are generally single-peak type, that is, the precipitation in July is the most, followed by the precipitation in August, and the minimum is in May. The main flood season is from the third pentad in July to the fourth pentad in August. 3) In general, precipitation in the nighttime is more rain that in the daytime. During the early flood season, the precipitation before early July mostly occurs between 16:00 and 21:00; during the main flood season, the precipitation presents a double-peak type with the peak value appearing between 17:00 and 22:00 and the secondary peak value appearing between 00:00 and 07:00; the later flood season after middle August is characterized by more precipitation in the nighttime with the peak value appearing between 00:00 and 08:00. 4) The short-duration precipitation mostly occurs in plateau mountainous areas and the long-duration accumulated precipitation contributes much to the seasonal precipitation in plain areas, while the persistent precipitation contributes much to Taihang Mountains and the west of windward slope of Yanshan Mountains.
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