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不同类型气溶胶对长三角地区地闪活动影响

吴啸天 王晓妍 郑栋 张义军

吴啸天, 王晓妍, 郑栋, 等. 不同类型气溶胶对长三角地区地闪活动影响. 应用气象学报, 2023, 34(5): 608-618. DOI:  10.11898/1001-7313.20230509..
引用本文: 吴啸天, 王晓妍, 郑栋, 等. 不同类型气溶胶对长三角地区地闪活动影响. 应用气象学报, 2023, 34(5): 608-618. DOI:  10.11898/1001-7313.20230509.
Wu Xiaotian, Wang Xiaoyan, Zheng Dong, et al. Effects of different aerosols on cloud-to-ground lightning activity in the Yangtze River Delta. J Appl Meteor Sci, 2023, 34(5): 608-618. DOI:  10.11898/1001-7313.20230509.
Citation: Wu Xiaotian, Wang Xiaoyan, Zheng Dong, et al. Effects of different aerosols on cloud-to-ground lightning activity in the Yangtze River Delta. J Appl Meteor Sci, 2023, 34(5): 608-618. DOI:  10.11898/1001-7313.20230509.

不同类型气溶胶对长三角地区地闪活动影响

DOI: 10.11898/1001-7313.20230509
资助项目: 

国家自然科学基金项目 42175090

详细信息
    通信作者:

    吴啸天, 邮箱:22113020028@m.fudan.edu.cn

Effects of Different Aerosols on Cloud-to-ground Lightning Activity in the Yangtze River Delta

  • 摘要: 利用2015—2021年4—9月中国气象局全国地闪定位网的地闪观测资料与MERRA2气溶胶光学厚度再分析资料,分析长江三角洲及其周边地区(27.5°~35°N,115°~122.5°E)地闪活动与不同种类气溶胶的关系。结果表明:不同种类气溶胶与地闪活动的关系不同,有地闪日的硫酸盐气溶胶光学厚度更高,无地闪日的沙尘气溶胶光学厚度更高,地闪多发生在硫酸盐气溶胶光学厚度较高且沙尘气溶胶光学厚度较低的环境中。当硫酸盐气溶胶光学厚度低于阈值时,在一定相对湿度条件下地闪密度与硫酸盐气溶胶光学厚度为正相关关系,当硫酸盐气溶胶光学厚度高于阈值时,地闪密度有减小的趋势或趋势不明显,且不同月份的阈值不同。因此,气溶胶的云微物理作用与辐射效应的叠加使得气溶胶与地闪活动的关系更为复杂,而沙尘气溶胶与地闪密度在4—6月呈负相关关系,7—9月相关不显著。
  • 图  1  2015—2021年长三角及周边地区地闪密度、大气AOD、硫酸盐AOD和沙尘AOD空间分布

    Fig. 1  Spatial distribution of cloud-to-ground lightning density, atmosphere AOD, sulfate AOD and dust AOD in the Yangtze River Delta from 2015 to 2021

    图  2  2015—2021年长三角及周边地区逐月平均的大气AOD、硫酸盐AOD、沙尘AOD和地闪数

    Fig. 2  Monthly averaged atmosphere AOD, sulfate AOD, dust AOD and cloud-to-ground lightning number in the Yangtze River Delta from 2015 to 2021

    图  3  2015—2021年长三角及其周边地区有地闪日平均大气AOD、硫酸盐AOD和沙尘AOD较无地闪日的相对变化

    Fig. 3  Spatial distribution of differences in monthly averaged atmosphere AOD, sulfate AOD and dust AOD between cloud-to-ground lightning days and no cloud-to-ground lightning days in the Yangtze River Delta from 2015 to 2021

    图  4  2015—2021年4—9月长三角及其周边地区逐月平均的大气AOD、硫酸盐AOD和沙尘AOD在有地闪日和无地闪日的箱线图

    Fig. 4  Box plots of monthly averaged total AOD, sulfate AOD and dust AOD in cloud-to-ground lighting days and no cloud-to-ground lightning days in the Yangtze River Delta from Apr to Sep during 2015-2021

    图  5  AOD较高与较低条件下地闪密度差值

    Fig. 5  Spatial distribution of differences in cloud-to-ground lightning density between high and low AOD conditions

    图  6  2015—2021年4—9月长三角及其周边地区地闪密度与硫酸盐AOD散点图

    Fig. 6  Scatter plots of cloud-to-ground lightning density and sulfate AOD in the Yangtze River Delta from Apr to Sep during 2015-2021

    图  7  2015—2021年4—9月长三角及其周边地区地闪密度与850 hPa相对湿度散点图

    Fig. 7  Scatter plots of cloud-to-ground lightning density and 850 hPa relative humidity in the Yangtze River Delta from Apr to Sep during 2015-2021

    图  8  2015—2021年4—9月长三角及其周边地区硫酸盐AOD与850 hPa相对湿度散点图

    Fig. 8  Scatter plots of sulfate AOD and 850 hPa relative humidity in the Yangtze River Delta from Apr to Sep during 2015-2021

    图  9  2015—2021年4—9月长三角及其周边地区地闪密度与沙尘AOD散点图

    Fig. 9  Scatter plots of cloud-to-ground lightning density and dust AOD in the Yangtze River Delta from Apr to Sep during 2015-2021

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  • 收稿日期:  2023-04-03
  • 修回日期:  2023-06-12
  • 刊出日期:  2023-09-30

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