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中国东部暖季对流云与层状云的比例及与降水的对应关系

高翠翠 李昀英 寇雄伟 孙国荣

高翠翠, 李昀英, 寇雄伟, 孙国荣. 中国东部暖季对流云与层状云的比例及与降水的对应关系[J]. 大气科学, 2017, 41(3): 490-500. doi: 10.3878/j.issn.1006-9895.1610.16138
引用本文: 高翠翠, 李昀英, 寇雄伟, 孙国荣. 中国东部暖季对流云与层状云的比例及与降水的对应关系[J]. 大气科学, 2017, 41(3): 490-500. doi: 10.3878/j.issn.1006-9895.1610.16138
Cuicui GAO, Yunying LI, Xiongwei KOU, Guorong SUN. The Ratio of Convective Clouds to Stratiform Clouds and Corresponding Precipitation during the Warm Season in Eastern China[J]. Chinese Journal of Atmospheric Sciences, 2017, 41(3): 490-500. doi: 10.3878/j.issn.1006-9895.1610.16138
Citation: Cuicui GAO, Yunying LI, Xiongwei KOU, Guorong SUN. The Ratio of Convective Clouds to Stratiform Clouds and Corresponding Precipitation during the Warm Season in Eastern China[J]. Chinese Journal of Atmospheric Sciences, 2017, 41(3): 490-500. doi: 10.3878/j.issn.1006-9895.1610.16138

中国东部暖季对流云与层状云的比例及与降水的对应关系

doi: 10.3878/j.issn.1006-9895.1610.16138
基金项目: 

财政部/科技部公益类行业专项 201306068

国家自然科学基金项目 41475069

国家自然科学基金项目 41205016

详细信息
    作者简介:

    高翠翠, 女, 1990年生, 硕士研究生, 主要从事气候学研究.E-mail:cc135900@163.com

    通讯作者:

    李昀英, E-mail:liyunying2005@163.com

  • 中图分类号: P426

The Ratio of Convective Clouds to Stratiform Clouds and Corresponding Precipitation during the Warm Season in Eastern China

Funds: 

the China R & D Special Fund for Public Welfare Industry 201306068

National Natural Science Foundation of China 41475069

National Natural Science Foundation of China 41205016

  • 摘要: 基于1985~2011年逐时地面台站观测云资料,分析了对流云和层状云及其比例关系的时空演变特征,结合逐日融合降水资料研究了对流云、层状云与季风雨带的对应关系。结果表明,中国东部暖季(5~9月)对流云发生频率平均为15.4%,层状云为30.0%。对流云与层状云发生频率的比例在广东、广西、海南省东部和贵州省大部分地区大于1,其它地区均小于1。伴随季风雨带的北进南退,层状云发生频率和云量中心均与降水中心对应,且层状云云带与季风雨带位置吻合,随时间的演变趋势也相同,说明季风雨带主要由层状降水构成,对流云发生频率和云量大值中心则位于季风雨带南侧。对流云和层状云发生频率/云量的变化在华南地区和江淮流域呈显著负相关,云的类型主要由大气稳定度决定。对流云和层状云发生频率在华北地区呈显著正相关,水汽是形成云的决定因素。就降水频率而言,华南地区层状云降水和对流云降水各占一定的比例,而江淮流域和华北地区层状云降水频率更大。
  • 图  1  暖季(a)对流云和(b)层状云的发生频率;(c)暖季对流云与层状云发生频率的比例;(d)暖季对流云事件与层状云事件发生频率的比例

    Figure  1.  Occurrence frequencies of (a) convective clouds and (b) stratiform clouds in the warm season; (c) the frequency ratio of convective clouds to stratiform clouds, and (d) the frequency ratio of convective cloud events to stratiform cloud events in the warm season

    图  2  110°~122°E平均日降水量(单位:mm;等值线)随时间的演变;110°~122°E平均(a)对流云、(b)层状云日发生频率(填色)以及(c)对流云与层状云发生频率的比例(填色)随时间的演变

    Figure  2.  Variations of precipitation (units: mm; contours) and occurrence frequencies (shaded) of (a) convective clouds, (b) stratiform clouds, and (c) the frequency ratio (shaded) of convective clouds to stratiform clouds, averaged over 110°–122°E

    图  3  (a、b、c)6月、(d、e、f)7月、(g、h、i)8月对流云与层状云发生频率比例的空间分布:上旬(左列);中旬(中间列);下旬(右列)

    Figure  3.  Spatial distribution of 10-day averaged frequency ratio of convective clouds to stratiform clouds in (a, b, c) June, (d, e, f) July, and (g, h, i) August: The first 10 days (left column); the second 10 days (middle column); the third 10 days (right column)

    图  4  110°~122°E平均日降水量距平值(单位:mm;等值线)随时间的演变;110°~122°E平均(a)对流云、(b)层状云日云量距平值(填色)随时间的演变

    Figure  4.  Variation of daily precipitation anomaly (units: mm; contours) and anomalies of cloud amounts for (a) convective clouds (shaded) and (b) stratiform clouds (shaded), averaged over 110°–122°E

    图  5  (a)华南地区、(b)江淮流域和(c)华北地区标准化的对流云和层状云发生频率以及降水量(单位:mm)随时间的变化(点线代表对流云发生频率,实线代表层状云发生频率,虚线代表降水量)

    Figure  5.  Variation of standardized occurrence frequencies of convective clouds (dotted lines) and stratiform clouds (solid lines), and standardized precipitation (units: mm, dashed lines) in (a) Southern China, (b) Yangtze–Huaihe valley, and (c) Northern China

    图  6  暖季(a)对流云和(b)层状云伴随降水的频率

    Figure  6.  Frequencies of (a) convective precipitation and (b) stratiform precipitation in the warm season

    表  1  不同区域对流云和层状云与降水量的相关系数

    Table  1.   Correlation coefficients of convective clouds and stratiform clouds with precipitation in three regions

    区域 相关系数
    fcfs fcP fsP acas acP asP
    华南地区 -0.73* 0.08 0.32* -0.43* 0.08 0.57*
    江淮流域 -0.64* 0.06 0.26* -0.42* 0.00 0.38*
    华北地区 0.73* 0.71* 0.73* 0.70* 0.67* 0.74*
    注:表中fcfs)指对流云(层状云)发生频率,acas)指对流云(层状云)云量,P指降水量;加“*”的数字表示通过99%信度检验
    下载: 导出CSV
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  • 收稿日期:  2016-02-23
  • 网络出版日期:  2016-11-14
  • 刊出日期:  2017-05-15

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