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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 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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The Structure and Evolution of Sea Breezes During the Qingdao Olympics Sailing Test Event in 2006

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Advances in atmospheric sciences 2009年第1期26卷 132-142页

作者：盛春岩 Ming xue 高守亭 Shandong Provincial Meteorological Observatory Jinan Shangdong 250031 Shandong Provincial Meteorological institute Jinan Shangdong 250031 School of Meteorology University of Oklahoma NoThan Oklahoma 73072 USA Center for Analysis and Prediction of storms University of Oklahoma Norman Oklahoma 73072 USA laboratory of cloud-precipitation physics and severe storms institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029

Using data from automatic surface weather stations, buoys, lidar and Doppler, the diurnal variation and the three-dimensional structure of the sea breezes near the sailing sites of the Good Luck beijing- 2006 Qingdao International Regatta from 18 to 31 August 2006 are analyzed. Results show that excluding rainy days and days affected by typhoon, the sea breezes occur nearly every day during this period. When Qingdao is located at the edge of the subtropical high at 500 hPa, the sea breeze is usually stronger, around 3-4 m s^-1. It starts at around 1100 to 1300 LST and lasts about 6 hours. The direction of the sea breeze tends to be southeasterly. When Qingdao is under the control of the subtropical high, the sea breeze is usually weaker, less than 2.5 m s^-1 throughout the day, and begins later, between 1300 and 1500 LST. In this case, the direction of the sea breeze is variable from easterly to southeasterly. Most sea breezes in Qingdao are very shallow, up to 300 meters deep. Strong sea breezes can reach 1.5 km in depth and can push as far as 100 km inland. If the Huanghai sea breeze moves inland and meets the sea breeze of the Jiaozhou Bay in the western part of Qingdao, the sea breeze will strengthen and form three boundaries due to the interaction of the two sea breezes.

关键词： Olympic sailing sea breeze local coastal winds

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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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Impacts of Secondary Aerosols on a Persistent Fog Event in Northern china

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atmospheric and Oceanic Science Letters 2012年第5期5卷 401-407页

作者： JIA Xing-Can GUO xue-Liang laboratory of cloud and precipitation and severe storms (LACS) Institute of Atmospheric Physics Chinese Academy of Sciences. Beijing 100029 China Graduate University of chinese academy of sciences Beijing 100049 China chinese academy of Meteteorological sciences Beijing 100081 China

The chemistry version of the Weather Re- search and Forecasting model （WRF/Chem） was coupled with the anthropogenic emission inventory of David Streets to investigate the impacts of secondary aerosols on a persistent fog event from 25 to 26 October 2007, in Northem china. The spatial distribution of the simulated fog is consistent with satellite observations, and the time-height distributions of the simulated boundary layer where the fog formed are also in good agreement with these observations. The sensitivity studies show that the secondary aerosols of SO4, NO3, and NH4 formed from gaseous precursors of SO2, NOx, and NH3 had substantial impacts on the formation processes and microphysical structure of the fog event. The decrease of the secondary aerosols obviously reduced the liquid water path and column droplet number concentration of the fog below the 1-km layer, and the corresponding area-averaged liquid water path and droplet number concentration of the fog decreased by 43% and 79%, respectively. The concentra- tions of NOx and NO3 were found to be extremely high in this case. The concentration of interstitial aerosol NO3 was much higher than the SO4 and NH4, but the concentration of SO4 was highest in the cloud-borne aerosols. The average activation ratios for SO4, NO3, and NH4 were 34%, 31%, and 30%, respectively, and the maximum ra- tios reached 62%, 86%, and 55% during the fog episode.

关键词： secondary aerosol fog WRF/Chem simulation

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1981～2.15年华北地区持续霾事件的特征及其环流分类研究

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气候与环境研究 2019年第3期24卷 341-358页

作者：孟亚楠孙建华卫捷赵琳娜中国科学院大气物理研究所云降水物理与强风暴实验室北京100029 中国科学院大学北京100049 中国气象科学研究院北京100081

根据1981~2.15年华北地区地面基本气象要素定时值数据集和地面气候日值数据集站点资料,分别利用14时实测值法和目标区域极端事件的客观识别方法挑选霾日数和持续霾事件,并分析了它们的特征;然后对持续霾事件进行了分类研究。结果表明:(1... 详细信息

根据1981~2.15年华北地区地面基本气象要素定时值数据集和地面气候日值数据集站点资料,分别利用14时实测值法和目标区域极端事件的客观识别方法挑选霾日数和持续霾事件,并分析了它们的特征;然后对持续霾事件进行了分类研究。结果表明:(1)华北地区霾日数空间分布极不均匀,有4个大值区:吕梁山和太行山之间的河谷地区、沿太行山以东的平原、河南北部、环黄海和渤海地区。(2)华北地区共挑选出111个持续霾事件,其中,持续3~5 d的事件最多,占了总数的86.5%,最长的事件可达12 d。(3)持续霾事件和霾日数的空间分布特征相似,且存在明显的年、季变化。1981~2.15年持续霾事件数呈增加趋势,冬季增加最显著,其次是秋季和春季,夏季最少。(4)结合地形、霾日数、持续霾事件的分布和环流特征把持续霾事件分为7类,对发生频次较多的4类(华北地区型,河南北部及太行山以东的平原型,河南北部型,河南北部及环渤海、黄海地区型)的环流进行了对比分析。其环流形势的主要特征包括:对流层的中低层华北地区为纬向西风气流或脊前西北气流,我国南部或东南部地区高压西部的西南气流与华北地区的偏西气流产生弱辐合下沉气流;近地面层由于地形的影响形成垂直环流圈,霾最严重的地区一般出现在地形的东坡和垂直环流圈的下沉支。近地面东南气流和低层的西南气流向该地区输送了暖湿空气和污染物。华北地区霾发生位置的不同,主要由低层我国东部或者南部高压的位置和强度,以及局地垂直环流的下沉支的位置决定。这些研究结果可以为华北地区持续性霾的防控提供参考。

关键词：华北地区霾日数持续霾事件空间分布环流特征

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