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| 1 | Low-Level Temperature Inversions and Their Effect on Aerosol Condensation Nuclei Concentrations under Different Large-Scale Synoptic Circulations显示文摘Knowledge of the statistical characteristics of inversions and their effects on aerosols under different large-scale synoptic circulations is important for studying and modeling the diffusion of pollutants in the boundary layer. Based on results generated using the self-organizing map(SOM) weather classification method, this study compares the statistical characteristics of surface-based inversions(SBIs) and elevated inversions(EIs), and quantitatively evaluates the effect of SBIs on aerosol condensation nuclei(CN) concentrations and the relationship between temperature gradients and aerosols for six prevailing synoptic patterns over the the Southern Great Plains(SGP) site during 2001–10. Large-scale synoptic patterns strongly influence the statistical characteristics of inversions and the accumulation of aerosols in the low-level atmosphere. The activity,frequency, intensity, and vertical distribution of inversions are significantly different among these synoptic patterns. The vertical distribution of inversions varies diurnally and is significantly different among the different synoptic patterns. Anticyclonic patterns affect the accumulation of aerosols near the ground more strongly than cyclonic patterns. Mean aerosol CN concentrations increase during SBIs compared to no inversion cases by 16.1%, 22.6%, 24.5%, 58.7%, 29.8% and 23.7% for the six synoptic patterns. This study confirms that there is a positive correlation between temperature gradients and aerosol CN concentrations near the ground at night under similar large-scale synoptic patterns. The relationship is different for different synoptic patterns and can be described by linear functions. These findings suggest that large-scale synoptic patterns change the static stability of the atmosphere and inversions in the lower atmosphere, thereby influencing the diffusion of aerosols near the ground. | LI Jun CHEN Hongbin Zhanqing LI WANG Pucai Maureen CRIBB FAN Xuehua | 2015 | Advances in Atmospheric Sciences2015，32，7： | 12 |
| 2 | Ground-based measurements of aerosol optical properties and radiative forcing in North China显示文摘In order to gain an insight into the aerosol properties and their climatic effect over the continental source regions of China, it is of significance to carry out long-term ground-based measurements of aerosol optical properties and radiative forcing. A couple of temporary and permanent Aerosol Robotic Network (AERONET) sites and three comprehensive radiative sites were established in China as a result of international cooperation in recent years. Heavy aerosol loading and significant temporal and spatial variation over North China are revealed by the AERONET data. Aerosol-induced reductions in surface radiation budget are examined on the basis of collocated observations by sun photometers and pyranometers. | Hongbin Chen Xiangao Xia Pucai Wang Wenxing Zhang | 2007 | China Particuology2007，5，3： | 8 |
| 3 | Validation of MODIS aerosol products by CSHNET over China显示文摘The Chinese Sun Hazemeter Network (CSHNET) provides the necessary ground-based observation to validate and assess the applicability of MODIS aerosol optical depth (AOD) products over different ecological and geographic regions in China for the first time. The validation results show that the comprehensive utilization ratio and applicability of MODIS products varied very much over different regions and seasons from August 2004 to July 2005. On the Tibetan Plateau, the comprehensive utili- zation ratio of MODIS data was low: MODIS products only accounted for 16% of the ground-based observation; on average, 31% to 45% of MODIS products fell within the retrieval errors issued by NASA. A similar result was found in northern desert areas with the ratio of MODIS to observation ranging from 15% to 55%, with 7% to 39% of MODIS products within errors. In the remote northeast corner of China, low ratios of MODIS to observation were also found ranging from 14% to 46%, with 49% to 69% of MODIS within errors. The forested sites exhibited moderate ratios of MODIS to observation ranging from 46% to 65%, with 30% to 59% of MODIS within errors. This was similar to numbers observed at sites along eastern seashore of China and inland urban sites with the ratio of MODIS to observation between 63% to 75%, with 25% to 67% of MODIS within errors for sites along eastern seashore of China and 43% to 78%, with 35% to 75% of MODIS within errors for inland urban sites. The ratio of MODIS to observation over agricultural areas ranged from 61% to 89%; 59%-88% of MODIS fell within the retrieval errors. At homogeneous and well vegetated areas, the comprehensive utilization ratio of MODIS products was over 80% and above 70% of MODIS products fell within the retrieval errors in growing season. | WANG LiLi XIN JinYuan WANG YueSi LI ZhanQing WANG PuCai LIU GuangRen WEN TianXue | 2007 | Chinese Science Bulletin2007，52，12： | 7 |
| 4 | Change of NO_2 column density over Beijing from satellite measurement during the Beijing 2008 Olympic Games显示文摘The effect of the air quality ensuring measures for the Beijing 2008 Olympic Games in reducing air pollution during the game period is assessed using the tropospheric NO2 column density retrieved from Ozone Monitoring Instrument onboard AURA satel- lite. The basic method of the assessment is the comparison of the NO2 column densities during the game period with that during the corresponding period of 2005?2007 for the Beijing area, and the comparison among Beijing and neighbouring cities Tianjin and Tangshan, which are of similar situation in air pollution of NO2 in recent years. The images of tropospheric NO2 column den- sities over Northern China during the Beijing 2008 Olympic Games show the remarkable effect of the air quality ensuring meas- ures in reducing NO2 pollution: the tropospheric NO2 column density in Beijing is much lower than that in Tianjin and Tangshan, while there were very similar values in the three large cities during the same period of the last three years. About 40% reduction in tropospheric NO2 column density over the Beijing area is obtained from the assessment during July to August, 2008, a key period of air quality ensuring measures for the Beijing 2008 Olympic Games. | YU Huan WANG PuCai ZONG XueMei LI Xin LU DaRen | 2010 | Chinese Science Bulletin2010，55，3： | 6 |
| 5 | XCO_2 satellite retrieval experiments in short-wave infrared spectrum and ground-based validation显示文摘Based on the optimal estimation method, a satellite XCO2 retrieval algorithm was constructed by combining LBLRTM with VLIDORT. One-year GOSAT/TANSO observations over four TCCON stations were tested by our algorithm, and retrieval results were compared with GOSAT L2 B products and ground-based FTS measurements. Meanwhile, the influence of CO2 line mixing effect on retrieval was estimated, and the research showed that neglecting CO2 line mixing effect could result in approximately 0.25% XCO2 underestimation. The accuracy of XCO2 retrievals was similar to GOSAT L2 B products at cloud-free footprints with aerosol optical depth less than 0.3, and 1% accuracy of XCO2 retrievals can be reached based on the validation result with TCCON measurements. | ZHOU MinQiang ZHANG XingYing WANG PuCai WANG ShuPeng GUO LiLi HU LieQun | 2015 | Science China Earth Sciences2015，58，7： | 4 |
| 6 | Deriving Temporal and Vertical Distributions of Methane in Xianghe Using Ground-based Fourier Transform Infrared and Gas-analyzer Measurements显示文摘Methane(CH4)is one of the most important greenhouse gases in the atmosphere,making it worthwhile to study its temporal and vertical distributions in source areas,e.g.,North China.For this purpose,a ground-based high-resolution Fourier transform infrared spectrometer(FTIR),the Bruker IFS 125 HR,along with an in-situ instrument,the Picarro G2301,were deployed in Xianghe County(39.8°N,117.0°E),Hebei Province,China.Data have been recorded since June2018.For the FTIR measurements,we used two observation modes to retrieve the mole fraction of CH4:the Total Carbon Column Observing Network(TCCON)method(retrieval algorithm:GGG2014),and the Network for the Detection of Atmospheric Composition Change(NDACC)method(retrieval algorithm:SFIT4).Combining FTIR with in-situ measurements,we found the temporal and vertical distributions of atmospheric CH4 within three vertical layers(near the ground,in the troposphere,and in the stratosphere),and throughout the whole atmosphere.Regarding the diurnal variation of CH4 near the ground,the concentration at night was higher than during the daytime.Regarding the seasonal variation,CH4 was low in spring and high in summer,for all three vertical layers.In addition,there was a peak of CH4 in winter near the ground,both in the troposphere and the whole atmosphere.We found that variation of CH4 in the tropospheric column was close to that of the in-situ measurements near the ground.Furthermore,the variations of CH4 in the stratospheric column could be influenced by vertical motions,since it was higher in summer and lower in winter. | Denghui JI Minqiang ZHOU Pucai WANG Yang YANG Ting WANG Xiaoyu SUN Christian HERMANS Bo YAO Gengchen WANG | 2020 | Advances in Atmospheric Sciences2020，37，6： | 2 |
| 7 | Growth Rates of Fine Aerosol Particles at a Site near Beijing in June 2013显示文摘Growth of fine aerosol particles is investigated during the Aerosol–CCN–Cloud Closure Experiment campaign in June2013 at an urban site near Beijing. Analyses show a high frequency(~ 50%) of fine aerosol particle growth events, and show that the growth rates range from 2.1 to 6.5 nm h^(-1) with a mean value of ~ 5.1 nm h^(-1). A review of previous studies indicates that at least four mechanisms can affect the growth of fine aerosol particles: vapor condensation, intramodal coagulation,extramodal coagulation, and multi-phase chemical reaction. At the initial stage of fine aerosol particle growth, condensational growth usually plays a major role and coagulation efficiency generally increases with particle sizes. An overview of previous studies shows higher growth rates over megacity, urban and boreal forest regions than over rural and oceanic regions. This is most likely due to the higher condensational vapor, which can cause strong condensational growth of fine aerosol particles.Associated with these multiple factors of influence, there are large uncertainties for the aerosol particle growth rates, even at the same location. | Chuanfeng ZHAO Yanan LI Fang ZHANG Yele SUN Pucai WANG | 2018 | Advances in Atmospheric Sciences2018，35，2： | 2 |
| 8 | Analysis of Low-level Temperature Inversions and Their Effects on Aerosols in the Lower Atmosphere显示文摘High-quality and continuous radiosonde, aerosol and surface meteorology datasets are used to investigate the statistical characteristics of meteorological parameters and their effects on aerosols. The data were collected at the Atmospheric Radiation Measurement Southern Great Plains climate research facility during 2000–15. The parameters and vertical distribution of temperature inversion layers were found to have strong diurnal and seasonal changes. For surface-based temperature inversion (SBI), the mean frequency and depth of temperature inversion layers were 39.4% and 198 m, respectively. The temperature difference between the top and bottom of SBI was 4.8℃, and so the temperature gradient was 2.4℃(100 m)^-1. The detailed vertical distributions of temperature inversion had been determined, and only the temperature inversion layers below 1000 m showed diurnal and seasonal variations. Mean surface aerosol number concentrations increased by 43.0%, 21.9% and 49.2% when SBIs were present at 0530, 1730 and 2330 LST, respectively. The effect of SBI on surface aerosol concentration was weakest in summer (18.1%) and strongest in winter (58.4%). During elevated temperature inversion events, there was no noticeable difference in surface aerosol number concentrations. Temperature differences and temperature gradients across SBIs correlated fairly well with aerosol number concentrations, especially for temperature gradients. The vertical distribution of aerosol optical properties with and without temperature inversions was different. Surface aerosol measurements were representative of the air within (below), but not above, SBIs and EIs. These results provide a basis for developing a boundary layer aerosol accumulation model and for improving radiative transfer models in the lower atmosphere. | Jun LI Hongbin CHEN Zhanqing LI Pucai WANG Xuehua FAN Wenying HE Jinqiang ZHANG | 2019 | Advances in Atmospheric Sciences2019，36，11： | 1 |
| 9 | Variation of surface albedo and soil thermal parameters with soil moisture content at a semi-desert site on the Western Tibetan Plateau 显示文摘 | Kaicun Wang Pucai Wang Jingmiao Liu | 2005 | Boundary-Layer Meteor2005，116，： | 1 |
| 10 | Aerosol properties in a Chinese semiarid region 显示文摘 | Xia Xiangao Chen Hongbin Wang Pucai | 2004 | At mospheric Environment2004，38，27： | 1 |
| 11 | Trends in aerosol optical properties over the Bohai Rim in Northeast China from 2004 to 2010显示文摘 | Jinyuan Xin LiLi Wang Yuesi Wang Zhanqing Li Pucai Wang | 2011 | Atmospheric Environment2011，，35： | 1 |
| 12 | Aerosol properties in a Chinese semiarid region显示文摘 | Xiangao X Hongbin C Pucai W | 2004 | Atmos Env2004，38，27： | 1 |
| 13 | Variation of surface albedo and soil thermal parameters with soil moisture content at a semi-desert site on the western Tibetan Plateau显示文摘 | Kaicun Wang Pucai Wang Jingmiao Liu Michael Sparrow Shigenori Haginoya Xiuji Zhou | 2005 | Boundary - Layer Meteorology2005，，1： | 1 |
| 14 | Chemical characterization of air pollution in Eastern China and the Eastern United States显示文摘 | Xuexi Tie Guy P. Brasseur ChunSheng Zhao Claire Granier Steven Massie Yu Qin PuCai Wang Geli Wang PeiCai Yang Andreas Richter | 2006 | Atmospheric Environment2006，，： | 1 |
| 15 | Aerosol properties and their spatial and temporal variations over North China in spring 2001显示文摘 | Xia Xiangao Chen Hongbin Wang Pucai | 2005 | Tellus2005，57，： | 1 |
| 16 | Ground-Based Atmospheric CO_(2),CH_(4),and CO Column Measurements at Golmud in the Qinghai-Tibetan Plateau and Comparisons with TROPOMI/S5P Satellite Observations显示文摘Measurements of carbon dioxide(CO_(2)),methane(CH_(4)),and carbon monoxide(CO)are of great importance in the Qinghai-Tibetan region,as it is the highest and largest plateau in the world affecting global weather and climate systems.In this study,for the first time,we present CO_(2),CH_(4),and CO column measurements carried out by a Bruker EM27/SUN Fourier-transform infrared spectrometer(FTIR)at Golmud(36.42°E,94.91°N,2808 m)in August 2021.The mean and standard deviation of the column-average dry-air mixing ratio of CO_(2),CH_(4),and CO(XCO_(2),XCH_(4),and XCO)are 409.3±0.4 ppm,1905.5±19.4 ppb,and 103.1±7.7 ppb,respectively.The differences between the FTIR co-located TROPOMI/S5P satellite measurements at Golmud are 0.68±0.64%(13.1±12.2 ppb)for XCH_(4) and 9.81±3.48%(–10.7±3.8 ppb)for XCO,which are within their retrieval uncertainties.High correlations for both XCH_(4) and XCO are observed between the FTIR and S5P satellite measurements.Using the FLEXPART model and satellite measurements,we find that enhanced CH_(4) and CO columns in Golmud are affected by anthropogenic emissions transported from North India.This study provides an insight into the variations of the CO_(2),CH_(4),and CO columns in the Qinghai-Tibetan Plateau. | Minqiang ZHOU Qichen NI Zhaonan CAI Bavo LANGEROCK Jingyi JIANG Ke CHE Jiaxin WANG Weidong NAN Yi LIU Pucai WANG | 2023 | Advances in Atmospheric Sciences2023，40，2： | 1 |
| 17 | Estimation of surface long wave radiation and broadband emissivity using moderate resolution imaging spectroradiometer (MODIS) land surface temperature/emissivity products显示文摘 | Wang Kaicun Wan Zhengming Wang Pucai | 2005 | Journal of Geophysical Research: Atmospheres2005，110，11109： | 1 |
| 18 | Variation of surface albedo and soil thermal parameters with soil moisture content at a semi-desert site on the western Tibetan Plateau显示文摘 | Kaicun Wang Pucai Wang Jingmiao Liu Michael Sparrow Shigenori Haginoya Xiuji Zhou | 2005 | Boundary - Layer Meteorology2005，，1： | 1 |
| 19 | Recent progress in atomspheric observation research in China 显示文摘 | QIU Jinhuan CHEN Hongbin WANG Pucai | 2007 | Advavces in Atmopspheric Sciences2007，24，6： | 1 |
| 20 | 华北地区兴隆站二氧化碳浓度观测(英文)显示文摘基于兴隆站Picarro G2301观测资料,本文分析了2016年5月至2017年12月近地面二氧化碳浓度变化趋势以及远距离输送的影响。采用背景值筛选方法,提取了兴隆站二氧化碳背景浓度和污染浓度。分析表明,兴隆站二氧化碳背景浓度和污染浓度有相似的季节变化特征,夏季最低,冬季和早春较高。冬季和早春的高背景值主要由于正的生物通量,即更强的植物呼吸作用和更弱的植物光合作用;夏季则相反,夏季和初秋污染浓度与背景浓度差值均较大,主要是本地源排放增加,而72小时后向轨迹的聚类分析以及PSCF分析也表明,夏季由于来自北京,天津,河北和山东的气流输送,携带有高浓度二氧化碳气团也会使兴隆地区的二氧化碳污染浓度升高。远距离输送结果也表明,京津冀区域人为排放二氧化碳对兴隆地区四个季节的二氧化碳浓度均有正的贡献,冬季来自内蒙古和张家口的气团输送也会带来正的贡献。二氧化碳浓度的日变化在所有季节都很显著,10:00至14:00左右二氧化碳浓度较低。中午较强的边界层对流将高空低浓度的二氧化碳向下输送到近地面大气,下午则相反,而高值通常发生在夜间。 | YANG Yang WANG Ting WANG Pucai ZHOU Minqiang YAO Bo | 2019 | Atmospheric and Oceanic Science Letters2019，12，6： | 1 |
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