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Application of the moist vorticity vector in the analysis of a heavy rainfall event in North china

Progress in Natural Science:Materials International 2007年第12期17卷 1457-1465页

作者： zhao yu1,2.3, wang jianguo4 and xue deqiang2.1. laboratory of cloud-precipitation physics and severe storms, institute of atmospheric physics, chinese academy of sciences, Beijing 10002., china 2. Shandong Provincial Meteorological Observatory, Jinan 250031, china 3. Graduate University of chinese academy of sciences, Beijing 100039, china 4. Shandong Provincial Meteorological Bureau, Jinan 250031, china) laboratory of cloud-precipitation physics and severe storms Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Shandong Provincial Meteorological Observatory Jinan 250031 China Graduate University of chinese academy of sciences Beijing 100039 China Shandong Provincial Meteorological Bureau Jinan 250031 China

The moist vorticity vector (MVV), defined as (ζa×▽qv)/ρ introduced by Gao et al. is used to study a heavy rainfall event in North china. The MVV has zonal, meridional and vertical components in a three-dimensional framework. Analysis of domain-mean and mass-integrated quantities shows that the variation of the vertical component of the MVV closely follows the variation of the cloud hydrometeors, with a linear correlation coefficient of 0.95, indicating that the vertical component of the MVV is strongly associated with midlatitude convection. Further analysis shows that the vertical component of the MVV reflects the interaction between the horizontal vorticity and the horizontal specific humidity gradient, which can associate dynamic and thermodynamic processes with cloud microphysical processes. Thus, this study can help to understand how the interaction between circulations and clouds aids the development of convection, and the MVV can be used to trace the development and evolution of heavy rainfall.

关键词： moist vorticity vector heavy rainfall modeling study.

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Optical and Radiative Properties of Aerosols during a severe Haze Episode over the North china Plain in December 2.16

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Journal of Meteorological Research 2017年第6期31卷 1045-1061页

作者： yu ZHENG Huizheng CHE Leiku YANG jing CHEN Yaqiang wang Xiangao XIA Hujia zhao Hong wang Deying wang Ke GUI Linchang AN Tianze SUN Jie yu Xiang KUANG Xin LI Enwei SUN Dapeng zhao Dongsen YANG Zengyuan GUO Tianliang zhao Xiaoye ZHANG Key laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&TechnologyNanjing 210044 State Key laboratory of severe Weather/institute of atmospheric Composition of china Meteorological Administration Chinese Academy of Meteorological SciencesBeijing 100081 School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo 454000 Shijiazhuang Meteorological Bureau Shijiazhuang 050081 laboratory for Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 6 University of chinese academy of sciences Beijing 100049 National Meteorological Center China Meteorological AdministrationBeijing 100081 institute of Meteorological Science of Jilin Province Changchun 130062 Key laboratory for Earth System Modeling of Ministry of Education Department of Earth System Scienceand Joint Center for Global Change StudiesTsinghua UniversityBeijing 100084

The optical and radiative properties of aerosols during a severe haze episode from 15 to 22 December 2.16 over Beijing, Shijiazhuang, and Jiaozuo in the North china Plain were analyzed based on the ground-based and satellite data, meteorological observations, and atmospheric environmental monitoring data. The aerosol optical depth at 500 nm was 〈 0.30 and increased to 〉 1.4 as the haze pollution developed. The Angstr6m exponent was 〉 0.80 for most of the study period. The daily single-scattering albedo was 〉 0.85 over all of the North china Plain on the most polluted days and was 〉 0.97 on some particular days. The volumes of fine and coarse mode particles during the haze event were approximately 0.05-0.21 and 0.01-0.43 μm^3, respectively-that is, larger than those in the time without haze. The daily absorption aerosol optical depth was about 0.01-0.11 in Beijing, 0.01-0.13 in Shijiazhuang, and 0.01-0.04 in Jiaozuo, and the average absorption Angstrom exponent varied between 0.6 and 2.0. The aerosol radiative forcing at the bottom of the atmosphere varied from -23 to -227, -34 to -199, and -29 to -191 W m^-2 for the whole haze period, while the aerosol radiative forcing at the top of the atmosphere varied from -4 to -98, -10 to -51, and -21 to -143 W m^-2 in Beijing, Shijiazhuang, and Jiaozuo, respectively. Satellite observations showed that smoke, polluted dust, and polluted continental components of aerosols may aggravate air pollution during haze episodes. The analysis of the potential source contribution function and concentration-weighted trajectory showed that the contribu- tion from local emissions and pollutants transport from upstream areas were 190-450 and 100-410 btg m-3, respectively.

关键词： haze episodes aerosols optical properties radiative forcing North china Plain

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Comprehensive Analysis of the Optical and Radiative Properties of Aerosols during a severe Haze Episode over the North china Plain in December 2.16

Comprehensive Analysis of the Optical and Radiative Properti...

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第十三届全国气溶胶会议

作者： yu ZHENG Huizheng CHE Leiku YANG jing CHEN Yaqiang wang Xiangao Xia Hujia zhao Hong wang Deying wang Ke GUI Linchang AN Tianze SUN Jie yu Xiang KUANG Zengyuan GUO Tianliang zhao Xiaoye ZHANG Key laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&Technology State Key laboratory of severe Weather(LASW)and institute of atmospheric Composition Chinese Academy of Meteorological SciencesCMA School of Surveying and Land Information Engineering Henan Polytechnic University Shijiazhuang Meteorological Bureau laboratory for Middle Atmosphere and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of Sciences University of chinese academy of sciences National Meteorological Center CMA institute of Meteorological Science of Jilin Province Ministry of Education Key laboratory for Earth System Modeling Department of Earth System Scienceand Joint Center for Global Change Studies(JCGCS)Tsinghua University

We used information from a number of sources—including ground-based and satellite data, meteorological observations and atmospheric environmental monitoring data—in an attempt to understand the optical and radiative properties of aerosols during a severe haze episode over Beijing, Shijiazhuang and Jiaozuo in the North china Plain from 15 to 22 December *** aerosol optical depth at 500 nm was 1.4 as the haze pollution *** ?ngstr?m exponent was >0.80 for most of the study *** daily single-scattering albedo was >0.85 over all of the North china Plain on the most polluted days and was >0.97 on some *** volumes of fine and coarse mode particles during the haze event were .05–0.21 μm3 and .01–0.43 μm3, respectively—that is, larger than on the days without *** daily absorption aerosol optical depth was .01–0.11 at Beijing, .01–0.13 at Shijiazhuang and .01–0.04 at Jiaozuo and the average absorption ?ngstr?m exponent varied between 0.6 and *** aerosol radiative forcing at the bottom of the atmosphere varied from-23 to-227,-34 to-199 and-29 to-191 W m-2 for the whole haze period, while the aerosol radiative forcing at the top of the atmosphere varied from-4 to-98,-10 to-51 and-21 to-143 W m-2 at Beijing, Shijiazhuang and Jiaozuo, *** observations showed that the smoke, polluted dust and polluted continental components of aerosols may aggravate air pollution during haze *** potential source contribution function and concentration-weighted trajectory analysis showed that the contribution from local emissions and pollutants transported from upstream areas were 90–450 and 100–410 μg m-3, respectively.

关键词： haze episodes aerosols optical properties radiative forcing North china Plain

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