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Seasonal variation in surface ozone and its regional characteristics at global atmosphere watch stations in China

Journal of Environmental Sciences 2019年第3期31卷 291-302页

作者： ningwei liu Weili Lin Jianzhong Ma Wanyun Xu Xiaobin Xu Nanjing University of Information Science & Technology State Key Laboratory of Severe Weather & CMA Key Laboratory for Atmospheric Chemistry Chinese Academy of Meteorological Sciences Shenyang Institute of Atmospheric Environment China Meteorological Administration College of Life & Environmental Science Minzu University of China

We investigated the seasonal and spatial ozone variations in China by using three-year surface ozone observation data from the six Chinese Global Atmosphere Watch(GAW)stations and tropospheric column ozone data from satellite retrieval over the period2010–2012. It is shown that the seasonal ozone variations at these GAW stations are rather different, particularly between the western and eastern locations. Compared with western China, eastern China has lower background ozone levels. However, the Asian summer monsoon(ASM) can transport photochemical pollutants from the southern to the northern areas in eastern China, leading to a northward gradual enhancement of background ozone levels at the eastern GAW stations. Over China, the tropospheric column ozone densities peak during spring and summer in the areas that are directly and/or indirectly affected by the ASM, and the peak time lags from the south to the north in eastern China. We also investigated the regional representativeness of seasonal variations of ozone at the six Chinese GAW stations using the yearly maximum tropospheric column month as *** results show that the seasonal variation characteristics of ozone revealed by the Chinese GAW stations are typical, with each station having a considerable large surrounding area with the ozone maximum occurring at the same month. Ozone variations at the GAW stations are influenced by many complex factors and their regional representativeness needs to be investigated further in a broader sense.

关键词： Surface ozone Tropospheric ozone column GAW stations Seasonal variations Regional representativeness

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Atmospheric extinction properties in Shenyang,China

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Particuology 2015年第1期13卷 120-126页

作者： ningwei liu Yanjun Ma Jianzhong Ma Yangfeng Wang Suying Yang Liguang Li Chinese Academy of Meteorological Sciences Nanjing University of Information Science & Technology Institute of Atmospheric Environment China Meteorological Administration

Atmospheric visibility impairment due to human activities is becoming increasingly significant in metropolitan 8henyang, China. In this study, hourly data of relevant factors throughout the year 2010 in Shenyang were used to evaluate the local atmospheric extinction properties. The results show that the average coefficient of total extinction and aerosol single-scattering albedo in 2010 were 622.72 Mm^-1 and 0.87, respectively, values that are characteristic of the ＂municipal pollution type＂. Visibility is most impaired during winter and especially in January. The coefficient of total extinction exhibits a single daily cycle with a maximum at 5-6 am and a minimum at 3 pm. The mean extinction contributions of the constituents, from high to low, were particle scattering （87.49%）, particle absorption, gas absorption, and gas scattering. The extinction contribution of gas molecules was little more than 4.5%, far smaller than that of particles. Scattering by particles was the main contributor to extinction, especially in the morning and around midnight.

关键词： Atmospheric visibility Extinction properties Extinction contributions Partide scattering

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Multilevel air quality evolution in Shenyang:Impact of elevated point emission reduction

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Journal of Environmental Sciences 2022年第3期34卷 300-310页

作者： Xiaolan Li Guiqian Tang Liguang Li Weijun Quan Yangfeng Wang Ziqi Zhao ningwei liu Ye Hong Yanjun Ma Institute of Atmospheric Environment China Meteorological AdministrationNo.388 Changbai South RoadShenyangLiaoning 110166China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei Beijing 100089China

Visibility observed at different altitudes is favorable to understand the causes of air *** conducted 4-years of observations of visibility at 2.8 and 60 m and particulate matter(PM)concentrations from 2015 to 2018 in Shenyang,a provincial city in Northeast *** results indicated that visibility increased with the increasing height in winter(especially at night),and decreased with height in summer(especially at the daytime).PM concentration exhibited opposite vertical variation to visibility,reflecting that visibility de-grades with the increase of aerosol concentration in the *** radiosonde meteorological data showed that weak turbulence in the planetary boundary layer(PBL)in winter favored aerosols'accumulation near the *** in summer,unstable atmospheric con-ditions,upper-level moister environment,and regional transport of air pollutants resulted in the deterioration of upper-level ***-annual variation in the two-level visibility indicated that the upper-level visibility improved more significantly than low-level visibil-ity,much likely due to the reduction in emission of elevated point sources in *** study suggested that strengthening the control of surface non-point emissions is a promis-ing control strategy to improve Shenyang air quality.

关键词： Aerosol pollution Atmospheric visibility Planetary boundary layer Northeast China Vertical evolution

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Comparison of Two Air Pollution Episodes over Northeast China in Winter 2016/17 Using Ground-Based Lidar

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Journal of Meteorological Research 2018年第2期32卷 313-323页

作者： Yanjun MA Hujia ZHAO Yunsheng DONG Huizheng CHE Xiaoxiao LI Ye HONG Xiaolan LI Hongbin YANG Yuche liu Yangfeng WANG ningwei liu Cuiyan SUN Institute of Atmospheric Environment China Meteorological Administration Shenyang 110016 Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 State Key Laboratory of Severe Weather/Institute of Atmospheric Composition Chinese Academy of Meteorological Sciences Beijing 100081 Dalian Municipal Meteorological Observatory Dalian 116001 Jinan Center of Aviation Control Jinan 250107

This study analyzes and compares aerosol properties and meteorological conditions during two air pollution episodes in 19–22（E1） and 25–26（E2） December 2016 in Northeast China. The visibility, particulate matter（PM） mass concentration, and surface meteorological observations were examined, together with the planetary boundary layer（PBL） properties and vertical profiles of aerosol extinction coefficient and volume depolarization ratio that were measured by a ground-based lidar in Shenyang of Liaoning Province, China during December 2016–January *** suggest that the low PBL height led to poor pollution dilution in E1, while the high PBL accompanied by low visibility in E2 might have been due to cross-regional and vertical air transmission. The PM mass concentration decreased as the PBL height increased in E1 while these two variables were positively correlated in E2. The enhanced winds in E2 diffused the pollutants and contributed largely to the aerosol transport. Strong temperature inversion in E1 resulted in increased PM2.5 and PM10 concentrations, and the winds in E2 favoured the southwesterly transport of aerosols from the North China Plain into the region surrounding Shenyang. The large extinction coefficient was partially attributed to the local pollution under the low PBL with high ground-surface PM mass concentrations in E1,whereas the cross-regional transport of aerosols within a high PBL and the low PM mass concentration near the ground in E2 were associated with severe aerosol extinction at high altitudes. These results may facilitate better understanding of the vertical distribution of aerosol properties during winter pollution events in Northeast China.

关键词： aerosol pollution ground-based lidar Northeast China

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Variations in Column Concentration of Greenhouse Gases in China and Their Response to the 2015-2016 El Niño Event

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Journal of Meteorological Research 2024年第3期38卷 608-619页

作者： ningwei liu Lingjun XIA Youjun DOU Shaorou DONG Jing WEN Ying WANG Rui FENG Ruonan WANG Yuhe LI Institute of Atmospheric Environment China Meteorological AdministrationShenyang110166China Jiangxi Ecological Meteorology Centre Nanchang330096China Beijing Xiangyuan Academy of Meteorological Observing Technology Beijing100081China Climate Centre of Guangdong Province Guangzhou510641China Guangdong Meteorological Service Guangzhou510062China Liaoning Provincial Meteorological Equipment Support Centre Shenyang110166China Meteorological Centre of Northeast Air Traffic Administration of Civil Aviation of China Shenyang110161China

Since the industrial revolution,enhancement of atmospheric greenhouse gas concentrations as a result of human activities has been the primary cause of global *** monitoring and evaluation of greenhouse gases are significant prerequisites for carbon emission *** monthly data of global atmospheric carbon dioxide(CO_(2))and methane(CH4)column concentrations(hereinafter XCO_(2) and XCH_(4),respectively)retrieved by the Greenhouse Gas Observation Satellite(GOSAT),we analyzed the variations in XCO_(2)and XCH_(4)in China during 2010-2022 after confirming the reliability of the ***,the influence of a strong El Niño event in 2015-2016 on XCO_(2) and XCH_(4) variations in China was further *** results show that the retrieved XCO_(2) and XCH_(4) from GOSAT have similar temporal variation trends and significant correlations with the ground observation and emission inventory data of an atmospheric background station,which could be used to assess the variations in XCO_(2) and XCH_(4) in ***_(2) is high in spring and winter while XCH_(4) is high in *** XCO_(2) and XCH_(4) gradually declined from Southeast China to Northwest and Northeast China,with variation ranges of 401-406 and 1.81-1.88 ppmv,respectively;and the high value areas are located in the middle-lower Yangtze River ***_(2) and XCH_(4) in China increased as a whole during 2010-2022,with rapid enhancement and high levels of XCO_(2) and XCH_(4) in several *** significant increases in XCO_(2) and XCH_(4) over China in 2016 might be closely related to the strong El Niño-Southern Oscillation(ENSO)event during *** a global warming background in 2015,XCO_(2) and XCH_(4) increased by 0.768%and 0.657%in 2016 in *** analysis reveals that both the XCO_(2) and XCH_(4) variations might reflect the significant impact of the ENSO event on glacier melting in the Tibetan Plateau.

关键词： greenhouse gases column concentration CO_(2) CH4 El Niño-Southern Oscillation(ENSO) El Niño

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A modeling study of the regional representativeness of surface ozone variation at the WMO/GAW background stations in China

A modeling study of the regional representativeness of surfa...

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第二十四届大气污染防治技术研讨会

作者： ningwei liu Jianzhong Ma Wanyun Xu Yuhang Wang Andrea Pozzer Jos Lelieveld Institute of Atmospheric Environment China Meteorological Administration State Key Laboratory of Severe Weather & CMA Key Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological Sciences Georgian Institute of Technology Max Planck Institute for Chemistry

Six World Meteorological Organization(WMO)/Global Atmosphere Watch(GAW) stations are located at background sites in China, which constitute a network for monitoring surface ozone, including its long-term temporal variation. In this study, we evaluated the seasonal variation in surface ozone simulated by the ECHAM/MESSy Atmospheric Chemistry(EMAC) general circulation model with the measurements made at these WMO/GAW background stations for the period of 2010–2012, and investigated the regional representativeness of each station with respect to the seasonal variation in surface ozone. We determined the contributions of ozone originating from various tropospheric and stratospheric latitude bands based on EMAC simulations using a tagged tracer approach. The results showed that the predominant contribution to surface ozone was from the troposphere in northern middle-high and tropical latitudes. For each station there was a large surrounding area in which the yearly ozone maximum occurred in the same month as it did at the station, reflecting the regional characteristics of the seasonal variation in surface ozone recorded at the WMO/GAW background stations. Surface ozone in China was found to generally peak in summer over non-monsoon and mid-latitude monsoon regions and in spring over low-latitude monsoon regions, indicating that the regional representativeness of ozone variability in China is significantly influenced by the Asian summer monsoon.

关键词： Surface ozone variation GAW stations Regional representativeness Asian summer monsoon

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东亚区域对流层臭氧及其前体物的季节性关联

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应用气象学报 2017年第4期28卷 427-435页

作者：刘宁微马建中中国气象科学研究院北京100081 南京信息工程大学南京210044 中国气象局沈阳大气环境研究所沈阳110166

利用2010—2012年对流层臭氧(O_3)及其多种前体物的卫星遥感资料和全球水汽再分析资料,研究东亚区域O_3及其前体物的时空分布,以及在中国东部(分为南、北两部分)相关性的季节变化。结果表明:东亚区域NO_2与CO的对流层柱含量均表现为冬... 详细信息

利用2010—2012年对流层臭氧(O_3)及其多种前体物的卫星遥感资料和全球水汽再分析资料,研究东亚区域O_3及其前体物的时空分布,以及在中国东部(分为南、北两部分)相关性的季节变化。结果表明:东亚区域NO_2与CO的对流层柱含量均表现为冬季高、夏季低的时空变化形式。O_3对流层柱含量夏季达到峰值,冬季为谷值。中国东部的北部与南部地区O_3与NO_2均在夏秋季呈正相关,冬春季呈负相关。夏季大部分地区NO_x的光化学循环反应对O_3生成有积极的促进作用,冬季大部分地区O_3的光化学循环生成受到抑制。O_3与CO在北部地区夏秋季和南部地区夏季正相关性最大,无论是在北部还是南部地区,O_3与CO的相关性在轻污染情况下最大,而在重污染和背景情况下较小,表明重污染气团向下风方的输送更有利于O_3的光化学生成。O_3与水汽在北部和南部地区的多数时间均呈较显著的正相关性,而在南部地区夏季和北部地区冬季具有较大的负相关性,反映出不同的环流形式、气团来源及伴随的天气条件变化对O_3分布的影响。

关键词：臭氧前体物区域污染卫星遥感

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城市化发展对气象要素的影响

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气象 2006年第9期32卷 28-34页

作者：刘宁微马雁军中国气象局沈阳大气环境研究所沈阳110016

为了探讨城市化对城市区域气象环境的影响程度,以辽宁中部城市群为试验区域,选取一个冬季的重污染过程,利用中尺度数值模式MM5进行了数值模拟研究。研究发现,MM5能够比较细致地反映出城市化对区域气象环境的影响。结果表明:城市化发展... 详细信息

为了探讨城市化对城市区域气象环境的影响程度,以辽宁中部城市群为试验区域,选取一个冬季的重污染过程,利用中尺度数值模式MM5进行了数值模拟研究。研究发现,MM5能够比较细致地反映出城市化对区域气象环境的影响。结果表明:城市化发展对于地表状况的影响使得近地面风速、比湿减小,温度升高,同时会导致逆温现象加剧,恶化局地气象条件。

关键词：城市群数值模拟城市气象环境下垫面类型

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区域空气质量数值预报系统CAPPS3在辽宁的应用

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气象 2009年第10期35卷 84-89页

作者：刘宁微马雁军中国气象局沈阳大气环境研究所沈阳110016

利用城市大气污染数值预报系统CAPPS的第三版(CAPPS3),经过安装、调试和本地化、自动化处理,建立起适合于辽宁的区域空气质量数值预报系统,用于预报辽宁的城市污染指数和等级以及各污染物的日均浓度分布。通过模式预报结果与监测资料的... 详细信息

利用城市大气污染数值预报系统CAPPS的第三版(CAPPS3),经过安装、调试和本地化、自动化处理,建立起适合于辽宁的区域空气质量数值预报系统,用于预报辽宁的城市污染指数和等级以及各污染物的日均浓度分布。通过模式预报结果与监测资料的对比,发现辽宁14个主要城市SO2、NO2预报准确率的总体水平明显高于PM10。区域污染物浓度分布位置和大小的预报结果与实际情况相符,污染物小时浓度的演变也与实际风场的变化趋势保持一致,表明CAPPS3模式系统能够及时准确地预报出区域污染的形成和发展过程。

关键词：空气质量数值预报 CAPPS3 区域污染物浓度

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论个人隐私权法律保护中的现实问题

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内蒙古财经学院学报（综合版） 2011年第3期9卷 89-92页

作者：刘宁微内蒙古警察职业学院法律系内蒙古呼和浩特010021

本文针对个人隐私权法律保护中的现实问题提出了自己的观点,认为构建保护隐私权的较为完善的民事、刑事法律制度,解决好公众的知情权与隐私权保护间的关系,制定网络媒体中隐私权保护的对策以及关注特殊服务领域中的个人隐私权保护,是解... 详细信息

本文针对个人隐私权法律保护中的现实问题提出了自己的观点,认为构建保护隐私权的较为完善的民事、刑事法律制度,解决好公众的知情权与隐私权保护间的关系,制定网络媒体中隐私权保护的对策以及关注特殊服务领域中的个人隐私权保护,是解决好个人隐私权法律保护现实问题的有效途径。

关键词：隐私权法律保护知情权

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