气候变化研究进展2017，Vol.13Issue(6)：589-597,9.DOI:10.12006/j.issn.1673-1719.2017.047
北京城、郊和山区不同强度等级降水变化特征比较
Changes in Classified Precipitation in the Urban, Suburban and Mountain Areas of Beijing
摘要
Abstract
In this paper, based on hourly precipitation observations during 1977-2013 from the Beijing area, hourly precipitation in summer (June-Auguest) is classified into three categories: light (below the 50th percentile values), moderate (the 50th to 95th percentile values), and heavy (above the 95th percentile values). The characteristics of the classified precipitation changes are analyzed and the results reveal that both light and moderate precipitation decreased significantly during the research period which mainly caused the decrease in summer totals, but heavy precipitation showed no pronounced trend. Since 2004, the contribution of heavy rainfall to the summer totals in the urban area increased as compared to the suburban area, which is opposite to light rainfall. There are obvious differences in the diurnal variations of classified precipitation. Light precipitation shows a double peak structure in the early morning and at night, while moderate and heavy rainfall show a single peak at night. Light precipitation at the early morning peak-time decreased significantly in the whole Beijing area. Compared with the suburban area, light precipitation in the urban area occurred less frequently whereas heavy precipitation occurred more frequently at evening peak-time after 2004. The asymmetry of the rainfall is obvious, especially, for heavy precipitation. The asymmetry of heavy precipitation events in the urban area exhibit a significant increasing trend.关键词
小时降水/不同等级降水/日变化/降水过程不对称性Key words
hourly precipitation/classified precipitation/diurnal variation/asymmetry引用本文复制引用
袁宇锋,翟盘茂,李建,陈阳..北京城、郊和山区不同强度等级降水变化特征比较[J].气候变化研究进展,2017,13(6):589-597,9.基金项目
资助项目:国家自然科学基金面上项目(41575094) （41575094）
公益性行业(气象)科研专项(GYHY201506014) （气象）
