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华北地区秋冬季气溶胶污染与不同类型降水的关系

肖之盛 缪育聪 朱少斌 于扬 杜晓惠 车慧正

肖之盛,缪育聪,朱少斌,于扬,杜晓惠,车慧正. 2022. 华北地区秋冬季气溶胶污染与不同类型降水的关系. 气象学报,80(6):986-998 doi: 10.11676/qxxb2022.066
引用本文: 肖之盛,缪育聪,朱少斌,于扬,杜晓惠,车慧正. 2022. 华北地区秋冬季气溶胶污染与不同类型降水的关系. 气象学报,80(6):986-998 doi: 10.11676/qxxb2022.066
Xiao Zhisheng, Miao Yucong, Zhu Shaobin, Yu Yang, Du Xiaohui, Che Huizheng. 2022. The relationship between aerosol pollution and different precipitation types in autumn and winter in North China. Acta Meteorologica Sinica, 80(6):986-998 doi: 10.11676/qxxb2022.066
Citation: Xiao Zhisheng, Miao Yucong, Zhu Shaobin, Yu Yang, Du Xiaohui, Che Huizheng. 2022. The relationship between aerosol pollution and different precipitation types in autumn and winter in North China. Acta Meteorologica Sinica, 80(6):986-998 doi: 10.11676/qxxb2022.066

华北地区秋冬季气溶胶污染与不同类型降水的关系

doi: 10.11676/qxxb2022.066
基金项目: 国家自然科学基金项目(42030608)、国家重点研发计划项目(2017YFA0603501)
详细信息
    作者简介:

    肖之盛,主要从事气溶胶-云-降水相互作用研究。E-mail:xiaozs01@163.com

    通讯作者:

    车慧正,主要从事气溶胶光学辐射特性及其气候效应研究。E-mail:chehz@cma.gov.cn

  • 中图分类号: P426.6

The relationship between aerosol pollution and different precipitation types in autumn and winter in North China

  • 摘要: 气溶胶对降水的影响具有很大的不确定性,正确理解和认识气溶胶对不同类型降水的影响对提高天气预报的准确度和全球气候变化具有重要意义。利用GPM-DPR观测资料和MERRA-2再分析资料分析了气溶胶污染与华北地区2014—2020年秋、冬季对流云降水和层状云降水的关系。结果表明:与清洁状况相比,气溶胶污染状况下对流云降水的降水强度有所增强,雨顶高度更高。在污染状态下对流云降水具有粒径小但数浓度高的降水粒子,潜热加热率更高。气溶胶污染与层状云降水的降水强度、雨顶高度等宏观特征不存在明显相关。层状云降水相比对流云降水更容易受到大气水汽条件和垂直上升运动的影响。因此,在气象条件主导降水的情况下,气溶胶污染对华北地区层状云降水的影响很难通过GPM-DPR和MERRA-2数据观测到。

     

  • 图 1  研究区域地形 (黑色虚线框;色阶:地形高度,单位:m)

    Figure 1.  Topography in the study area (black dashed line box;shaded:terrain height,unit:m)

    图 2  层状云降水和对流云降水平均降水强度随气溶胶光学厚度变化及其相关关系 (误差棒表示标准差,**表示通过99%显著性t检验)

    Figure 2.  Trends of the mean rain rates of stratiform and convective precipitation with AOD and the correlation coefficients (the error bars represent standard deviations,** means the value passing the 99% confidence level t-test)

    图 3  层状云降水 (a) 和对流云降水 (b) 降水强度与气溶胶光学厚度分格点相关系数频率 (柱) 和累积频率 (曲线) (绿实线为0,红虚线为50%累积频率值,左侧坐标轴为频率,右侧坐标轴为累积频率)

    Figure 3.  Cumulative distribution function (curve) and frequency (bar) of grid-to-grid correlation coefficient of rain rate with AOD for (a) stratiform precipitation and (b) convective precipitation (green solid line is 0,red dotted line is 50% of cumulative frequency,the left axis is the frequency and the right axis is the cumulative frequency)

    图 4  层状云降水 (a) 和对流云降水 (b) 平均雷达反射率频率 (色阶,单位:%) 及 (c) 反射率最大值 (虚线,单位:dBz) 和平均值 (实线,单位:dBz) 随气溶胶光学厚度的变化 (c中蓝色代表层状云降水,红色代表对流云降水,误差棒表示标准差)

    Figure 4.  Mean radar reflectivity frequencies (shaded,unit:%) of stratiform precipitation (a) and convective precipitation (b) and their (c) maximum (dashed line,unit:dBz) and mean values (solid line,unit:dBz) versus AOD (blue lines in c represent stratiform precipitation,red lines represent convective precipitation,and the error bars indicate standard deviations)

    图 5  层状云降水和对流云降水在污染和清洁状态下 (a) 雨顶高度 (H) 和 (b) 降水强度 (R) 差异的频率 (柱) 和累积频率 (曲线)(左侧坐标轴为频率,右侧坐标轴为累积频率)

    Figure 5.  Cumulative distribution function (curve) and frequency (bar) of the differences in (a) rain top height (H) and (b) rain rate (R) of stratiform and convective precipitation between polluted and clean states (polluted minus clean)(the left axis is the frequency and the right axis is the cumulative frequency)

    图 6  层状云降水 (a、b) 和对流云降水 (c、d) 在污染和清洁状态下降水粒子粒径 (等值线,单位:mm) 和数浓度 (色阶,单位:m−3mm−1) 参数差异的垂直剖面 (污染减清洁,a、c为纬向平均,b、d为经向平均)

    Figure 6.  Vertical profiles of differences in particle size (contour,unit:mm) and number concentration (shaded,unit:m−3mm−1) of stratiform precipitation (a,b) and convective precipitation (c,d) in polluted and clean states (polluted minus clean,a and c show latitudinal averages,b and d are for longitudinal averages)

    Continued

    图 7  同图6,但为潜热加热率 (单位:K/h)

    Figure 7.  Same as Fig. 6 but for latent heating rate (unit:K/h)

    图 8  层状云降水 (a、b) 和对流云降水 (c、d) 的降水强度与800 hPa相对湿度 (a、c) 及可降水量 (b、d) 的相关关系 (*表示通过95%显著性t检验,**表示通过99%显著性t检验)

    Figure 8.  Correlation of rain rate with RH at 800 hPa (a,c) and precipitable water vapor (PWV) (b,d) for stratiform precipitation (a,b) and convective precipitation (c,d) (* means the value passing the 95% confidence level t-test,** means the value passing the 99% confidence level t-test)

    图 9  同图8,但为800 hPa纬向风 (a、c) 和经向风 (b、d)

    Figure 9.  Same as Fig. 8 but for the zonal wind U (a,c) and meridional wind V (b,d) at 800 hPa

    图 10  同图8,但为985 hPa垂直速度 (a、c) 和对流层下部稳定性 (b、d)

    Figure 10.  Same as Fig. 8 but for vertical velocity W at 985 hPa (a,c) and lower tropospheric stability (LTS) (b,d)

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  • 收稿日期:  2022-04-11
  • 修回日期:  2022-06-27
  • 网络出版日期:  2022-06-30

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