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夏季中国中东部不同历时降水时空分布特征

金炜昕 李维京 孙丞虎 左金清

金炜昕, 李维京, 孙丞虎, 左金清. 夏季中国中东部不同历时降水时空分布特征[J]. 气候与环境研究, 2015, 20(4): 465-476. doi: 10.3878/j.issn.1006-9585.2015.14268
引用本文: 金炜昕, 李维京, 孙丞虎, 左金清. 夏季中国中东部不同历时降水时空分布特征[J]. 气候与环境研究, 2015, 20(4): 465-476. doi: 10.3878/j.issn.1006-9585.2015.14268
JIN Weixin, LI Weijing, SUN Chenghu, ZUO Jinqing. Spatiotemporal Characteristics of Summer Precipitation with Different Durations in Central East China[J]. Climatic and Environmental Research, 2015, 20(4): 465-476. doi: 10.3878/j.issn.1006-9585.2015.14268
Citation: JIN Weixin, LI Weijing, SUN Chenghu, ZUO Jinqing. Spatiotemporal Characteristics of Summer Precipitation with Different Durations in Central East China[J]. Climatic and Environmental Research, 2015, 20(4): 465-476. doi: 10.3878/j.issn.1006-9585.2015.14268

夏季中国中东部不同历时降水时空分布特征

doi: 10.3878/j.issn.1006-9585.2015.14268
基金项目: 国家重点基础研究发展计划项目2013CB430203、2012CB955901,公益性行业(气象)科研专项GYHY201406018、GYHY201306033,国家自然科学基金项目41205058

Spatiotemporal Characteristics of Summer Precipitation with Different Durations in Central East China

  • 摘要: 利用1961~2012年台站逐时降水资料,分析了夏季中国中东部不同历时降水的主要气候分布和长期变化特征,为深入认识其时空变化规律和形成机理奠定基础。分析结果表明,降水事件的平均历时由南向北呈“短—长—短”分布型,华南和北方地区以6 h以下的短历时降水为主;而中部地区(28°N~37°N)6 h以上长历时降水占总降水量60%以上。随着降水历时的增加,小雨事件(0.1~1.0 mm/h)的发生概率降低,中雨事件(1.1~10.0 mm/h)的发生概率升高;大雨、暴雨事件(>10.0 mm/h)更易出现在35°N以南历时偏短的降水事件中。1961~2012年,中国中东部总降水量呈“南升北降”的趋势分布,夏季南方大部分地区降水强度、时数和事件数均呈上升趋势;而北方地区降水时数和事件数显著减少,不过降水强度呈增强趋势。中东部降水历时总体呈上升趋 势,尤其以我国长江与黄河之间的中部地区变化最为显著。同时,该地区短历时(1~6 h)降水无显著的年代际转折,长历时(>6 h)降水的年代际增加是20世纪70年代末至20世纪90年代初降水增多的主要原因。20世纪90年代初期以来,南方地区降水的年代际增多则是长、短降水共同作用的结果,但超过6 h降水的影响范围更广,且影响中心较短历时降水偏北。
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  • 收稿日期:  2014-12-14

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