Spatiotemporal characteristics of precipitation changes in the Pearl River Basin, China
Spatiotemporal characteristics of precipitation changes in the Pearl River Basin, China
复制标题
中国珠江流域降水变化时空特征
DOI：
10.1007/s00704-015-1375-4
复制
发表时间：
2016-02
影响因子：
3.4
通讯作者：
Yanqing Lian
中科院分区：
文献类型：
--
作者：
Junfan Chen;Wenxiu Lu;Xiaohong Chen;Yanqing Lian
利用珠江流域62个气象站逐日降水资料，利用Mann-Kendall检验，分析了珠江流域(1959~2009年)降水、降水强度和雨日的变化结构。利用反距离加权方法考察了季节降水量和降水强度等级对年降水量的贡献。得出以下四点结论：(1)全流域年平均降水量变化不明显，但98.3%的站点年多雨日数明显减少。这两个因素导致64.5%的站点降水强度明显增加。(2)全区降水季节变化趋势不明显，但各季降水日数明显减少。特别是全年和秋季降雨天数分别减少了98.3%和100%。(3)虽然83.9%的站点小雨日数减少，但出现大雨和特大暴雨的站点分别有近75.8%和82.3%的站点雨天数增加。(4)秋冬季降雨日数对年降水日数变化的贡献大于春夏季降水日数。大雨和特大暴雨对年总降水量变化的贡献大于毛毛雨，但对年降雨日数变化的贡献小于毛毛雨。研究结果可为政策制定者和利益相关者制定珠江流域水资源与生态环境管理战略提供重要信息。
The change structures of precipitation and precipitation intensity and rainy days are analyzed for the Pearl River Basin (from 1959 to 2009) on the basis of a suite of 24 climatic indices derived from daily precipitation data at 62 meteorological stations with the help of the Mann–Kendall test. Contributions of seasonal precipitation and precipitation intensity class to the annual precipitation are also examined using the inverse distance weighted method. The following four conclusions can be drawn: (1) although the average annual precipitation of the entire basin does not show obvious variation, the number of annual rainy days has decreased significantly in 98.3 % of the stations. These two factors result in an obvious increase in precipitation intensity at 64.5 % of the stations. (2) No clear change trend has been found for seasonal precipitation over the entire area; however, the number of rainy days in each season has decreased significantly. In particular, the number of rainy days in the entire year and in the fall season has decreased in 98.3 and 100 % of the stations, respectively. (3) Although the number of rainy days in drizzle has decreased in 83.9 % of the stations, the number of rainy days where heavy rain and extremely heavy rain occurred increased in nearly 75.8 and 82.3 % of the stations, respectively. (4) The number of rainy days in fall and winter contributes more to the change in the number of annual rainy days than the number of rainy days in spring and summer. Heavy rain and extremely heavy rain contribute more to the change in total annual precipitation than drizzle; however, they contribute less to the change in the number of annual rainy days than drizzle. The findings in this study can provide important information for formulating water resource and eco-environment management strategies in the Pearl River Basin to policymakers and stakeholders.
登录
查看更多内容
DOI：
10.1007/s00477-006-0036-7
发表时间：
2006-02
影响因子：
4.2
作者：
S. Becker;M. Gemmer;T. Jiang
通讯作者：
S. Becker;M. Gemmer;T. Jiang
DOI：
10.12677/jwrr.2012.13014
发表时间：
2012-06
期刊：
Journal of Water Resources Research
影响因子：
--
作者：
彭 俊台
通讯作者：
彭 俊台
DOI：
10.2307/1402637
发表时间：
1949-12
期刊：
--
影响因子：
--
作者：
M. Kendall
通讯作者：
M. Kendall
影响因子：
4.4
作者：
Alexander, LV;Zhang, X;Vazquez-Aguirre, JL
通讯作者：
Vazquez-Aguirre, JL
DOI：
10.1007/978-1-4684-6683-6_9
发表时间：
1981
期刊：
--
影响因子：
--
作者：
R. Forthofer;R. Lehnen
通讯作者：
R. Forthofer;R. Lehnen