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2008—2013年新疆夏季降水的日变化特征

朱小凡,张明军*,王圣杰,杜铭霞,强芳,靳晓刚,王杰   

  1. (西北师范大学地理与环境科学学院, 兰州 730070)
  • 出版日期:2016-02-10 发布日期:2016-02-10

Diurnal variation characteristics of precipitation of Xinjiang in summer during 2008-2013.

ZHU Xiao-fan, ZHANG Ming-jun*, WANG Sheng-jie, DU Ming-xia, QIANG Fang, JIN Xiao-gang, WANG Jie   

  1. (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China)
  • Online:2016-02-10 Published:2016-02-10

摘要: 选用中国自动气象站与CMORPH融合的逐时降水量0.1°网格数据集,使用逐时降水量、降水频率和降水强度等指标,分析了2008—2013年新疆夏季降水的日变化特征。结果表明:逐时降水量和降水频率的日变化特征基本一致,北疆的逐时降水量和降水频率较南疆大,山区较盆地大,逐时降水强度的高值区更多地分布在降水稀少的盆地区域;大部分区域的逐时降水量、降水频率和降水强度均是6月最大,7月次之,8月最小;逐时降水量和降水频率的峰值时间具有相似的空间特征,且后者的区域特征更为显著,两者在山区的峰值时间主要集中在18:00—23:00,而盆地区域的降水峰值时间多集中于0:00—5:00;白天和夜间降水量的空间特征基本一致;此外,逐时降水量与逐时降水频率的相关性最高,与逐时降水强度的相关性次之,而逐时降水频率与逐时降水强度的相关性最差,特别是在干旱的盆地区域。

关键词: 湿地植物组合, 去除率, 总磷, 化学需氧量, pH, 总氮

Abstract: The diurnal variation characteristics of precipitation (such as hourly precipitation amount, frequency and intensity) of Xinjiang in summer during 2008-2013 were analyzed with 0.1° gridded hourly precipitation dataset merged from automatic weather stations in China and the Climate Precipitation Center Morphing (CMORPH) precipitation product. The results showed that the diurnal variation features of hourly precipitation amount and frequency were similar; both indexes were much larger in northern Xinjiang than in southern Xinjiang and much larger in mountains than in basins, but the higher values of hourly precipitation intensity occurred more in arid basins. The values of hourly precipitation amount, frequency and intensity in most areas of Xinjiang were the largest in June and the least in August. In addition, the peak time of hourly precipitation amount and frequency had a parallel spatial pattern, and the latter was more prominent, in which the peak time of both indexes happened from 18:00 to 23:00 in mountains and from 0:00 to 5:00 in basins. Additionally, the precipitation amount in daytime and nighttime showed a similar spatial pattern. Moreover, the correlation between hourly precipitation amount and frequency was the highest, secondly by the correlation between hourly precipitation amount and intensity, while the correlation between hourly precipitation frequency and intensity was poor, especially in arid basins.

Key words: wetland plant combination, total nitrogen, total phosphorus, chemical oxygen demand, pH, removal efficiency