| 中国典型地区夏季气溶胶时空分布及其对云和降水的影响 |
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| 引用本文： | 高星星,桂海林,陈艳,张镭,张武.中国典型地区夏季气溶胶时空分布及其对云和降水的影响[J].气象与环境学报,2020,36(1):11-20. |
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| 作者姓名： | 高星星 桂海林 陈艳 张镭 张武 |
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| 作者单位： | 1. 陕西省气象台, 陕西 西安 7100152. 中国气象局大气化学重点开放实验室, 北京 1000813. 国家气象中心, 北京 1000814. 兰州大学大气科学学院半干旱气候变化教育部重点实验室, 甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金重点项目“利用先进云雷达和拉曼激光雷达对半干旱区云特性及辐射效应的观测研究”(41430425);国家自然科学基金创新研究群体科学基金“干旱半干旱气候变化机理”(41521004);中国气象局大气化学重点开放实验室开放课题(2019B02)共同资助 |
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| 摘 要： | 利用2006—2016年夏季中分辨率成像光谱仪（Moderate-resolution Imaging Spectroradiometer，MODIS）气溶胶和云资料以及热带降水测量计划（Tropical Rainfall Measuring Mission，TRMM）降水数据，分析了中国8个典型地区气溶胶、云和降水的时空分布特征，探讨了气溶胶与云和降水的相互关系。结果表明：中国8个典型地区夏季平均气溶胶光学厚度（Aerosol Optical Depth，AOD）、云光学厚度（Cloud Optical Depth，COD）、云水路径（Cloud Water Path，CWP）、水云云滴有效粒子半径（Cloud Effective Radius Water，CERW）、冰云云滴有效粒子半径（Cloud Effective Radius Ice，CERI）和降水强度变化范围分别为0.21—1.05、15.01—24.02、151.98—219.20 g·m-2、12.93—15.37 μm、28.85—39.14 μm和0.44—8.54 mm·d-1；黄土高原和四川盆地AOD有显著降低趋势，年倾向分别为-2.30%和-3.20%，长江三角洲COD年增幅为29.11%，华北平原、长江三角洲和珠江三角洲CERI及塔克拉玛干沙漠CERW变化趋势分别为-21.60%、-15.77%、-18.94%和-10.31%；AOD与COD和CWP呈正相关，与云滴有效粒子半径（Cloud Effective Radius，CER）关系较为复杂，受水汽影响较大，在云层含水量较低的情况下，CERI（CERW）与AOD呈负（正）相关，而在云层含水量较高的情况下，二者呈正（负）相关；气溶胶和降水关系复杂，整体来看，气溶胶促进了中国地区的夏季降水。
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| 关 键 词： | 气溶胶 光学厚度 夏季降水 卫星资料 |
| 收稿时间： | 2018-12-07 |
Spatiotemporal characteristics of aerosols and its effects on cloud and precipitation during summer over typical regions in China |
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| GAO Xing-xing,GUI Hai-lin,CHEN Yan,ZHANG Lei,ZHANG Wu.Spatiotemporal characteristics of aerosols and its effects on cloud and precipitation during summer over typical regions in China[J].Journal of Meteorology and Environment,2020,36(1):11-20. |
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| Authors: | GAO Xing-xing GUI Hai-lin CHEN Yan ZHANG Lei ZHANG Wu |
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| Institution: | 1. Shaanxi Meteorological Observatory, Xi'an 710015, China2. Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing 100081, China3. National Meteorological Centre, Beijing 100081, China4. Key Laboratory of Semi-Arid Climate Changes with the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Based on the aerosol and cloud data from the Moderate-resolution Imaging Spectroradiometer(MODIS)satellite,and the precipitation data from the Tropical Rainfall Measuring Mission(TRMM)in summer from 2006 to 2016,we analyzed the spatiotemporal characteristics of aerosols,cloud,and precipitation over eight typical regions in China,and we examined the interaction between aerosols and cloud and precipitation.The results indicated that the values of summertime averaged Aerosol Optical Depth(AOD)and cloud optical properties vary in the following ranges:AOD in 0.21-1.05,Cloud Optical Depth(COD)in 15.01-24.02,Cloud Water Path(CWP)in151.98-219.20 g·m^-2,Cloud Effective Radius of Water(CERW)in 12.93-15.37μm,Cloud Effective Radius of Ice(CERI)in 28.85-39.14μm,and precipitation in 0.44-8.54 mm·d^-1,respectively.The AODs have a significant decreasing trend over the Loess Plateau and Sichuan Basin,with an annual declining trend of-2.30%and-3.20%,respectively.The COD over the Yangtze River Delta increases by 29.11%.The variation of CERI is-21.60%over the North China Plain,-15.77%in the Yangtze River Delta,-18.94%in the Pearl River Delta,respectively,and the CERW over the Taklimakan Desert varies in about-10.30%.AOD has a positive correlation with CWP and COD and a complex relationship with Cloud Effective Radius(CER),which is largely affected by water vapor.Under the low CWP conditions,AOD exhibits a negative(positive)correlation with CERI(CERW),but an opposite correlation occurs under the high CWP conditions.The relationship between aerosols and precipitation is also complex.Overall,aerosols promote summertime precipitation in China. |
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| Keywords: | Aerosol Optical depth Precipitation in summer Satellite data |
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