Mesoscale modeling study of the interactions between aerosols and PBL meteorology during a haze episode in Jing–Jin–Ji (China) and its nearby surrounding region – Part 1: Aerosol distributions and meteorological features
Mesoscale modeling study of the interactions between aerosols and PBL meteorology during a haze episode in Jing–Jin–Ji (China) and its nearby surrounding region – Part 1: Aerosol distributions and meteorological features
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京津冀及周边地区雾霾期间气溶胶与 PBL 气象相互作用的中尺度模拟研究 - 第 1 部分：气溶胶分布和气象特征
DOI：
10.5194/acp-15-3257-2015
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发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
C. H. Zhe
中科院分区：
文献类型：
--
作者：
H. Wang;M. Xue;X. Y. Zhang;H. L. Liu;C. H. Zhe
抽象。京津冀城市化地区及其周边地区正成为中国雾霾污染最严重的地区，甚至超过了长江三角洲和珠江三角洲。除污染物排放外，影响灰霾污染的最重要因素是大气边界层的气象条件。以2008年7月为研究对象，利用在线大气化学输送模式对3 JNS区域与灰霾形成密切相关的气溶胶光学特性和边界层气象特征进行了数值模拟。讨论了区域边界层气象、PM2.5和灰霾的关系。模式结果准确地模拟了气溶胶光学厚度（AOD），单次散射散射（SSA）和不对称参数（ASY），并与来自中分辨率成像光谱仪（MODIS），中国气溶胶遥感网（CARSNET）和气溶胶机器人网络（AERONET）的观测结果进行了比较。模拟的边界层风速与国家环境预报中心（NCEP）再分析2的结果显示出合理的一致性。月平均AOD值高达1.2被发现从模式和观测，与日平均值大于2.0，在灰霾事件在3 JNS区域。模式和观测的SSA值为0.90-0.96，ASY值为0.72-0.74，表明该地区夏季气溶胶具有高散射特性。模式和NCEP资料的边界层风速都显示了PM2.5变化的反向趋势，说明了“边界层窗影”在灰霾形成中的重要性。湍流扩散和边界层高度与地面PM2.5呈相反的相位，表明较低的边界层高度和较弱的边界层湍流扩散是灰霾形成的必要条件。值得注意的是，均匀的空气压力并没有出现在表面，但在850-950百帕的高度在烟霞事件。冷空气从边界层上方向下输送动量到低层边界层和地面，导致地面风速增加，灰霾消散。
Abstract. The urbanized region ofJing(Beijing)-Jin(Tianjin)-Ji (alias of Hebei province) and its nearby surrounding region (3JNS) is becoming China's most polluted area by haze, exceeding even the Yangtze and Pearl river deltas. Aside from pollutant emission, the meteorology of the planetary boundary layer (PBL) is the most important factor affecting haze pollution. Focusing on July 2008, the aerosol optical properties and PBL meteorology features closely related to haze formation were simulated in the 3JNS region using an online atmospheric chemical transport model. The relationship between regional PBL meteorology, PM2.5, and haze is discussed. Model results accurately simulated the aerosol optical depth (AOD), single scattering albedo (SSA) and asymmetry parameter (ASY), validated by comparison with observations from the MODerate Resolution Imaging Spectroradiometer (MODIS), the China Aerosol Remote Sensing NETwork (CARSNET) and the Aerosol Robotic NETwork (AERONET). Modeled PBL wind speeds showed reasonable agreement with those from the National Centers for Environmental Prediction (NCEP) Reanalysis 2. A monthly mean AOD value as high as 1.2 was found from both model and observations, with a daily mean larger than 2.0 during haze episodes in the 3JNS region. Modeled and observed SSA values of 0.90–0.96 and ASY values of 0.72–0.74 demonstrated the high scattering characteristic of summer aerosols in this region. PBL wind speeds from modeled and NCEP data both showed a reversing trend of PM2.5 variation, illustrating the importance of the "PBL window shadow" in haze formation. Turbulence diffusion and PBL height had opposite phases to surface PM2.5, indicating that lower PBL height and weaker PBL turbulence diffusion are essential to haze formation. It is noted that homogeneous air pressure does not occur at the surface, but at an 850–950 hPa height during the haze episode. The momentum transmitting downward of the cold air from above the PBL to the low PBL and surface lead to an increase in surface wind speeds and haze dispersal.
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影响因子：
6.3
作者：
Jianglong Zhang;J. Reid
通讯作者：
Jianglong Zhang;J. Reid
GRAPES物理程序结构设计及优化测试
影响因子：
--
作者：
通讯作者：
--
影响因子：
3.2
作者：
J. Srinivasan;G. Smith
通讯作者：
J. Srinivasan;G. Smith
DOI：
10.1007/978-1-935704-36-2_1
发表时间：
1969
期刊：
Meteorological Monographs
影响因子：
--
作者：
E. Kessler
通讯作者：
E. Kessler
影响因子：
5.5
作者：
Jihua Tan;Songjun Guo;Yong-liang Ma;Jing-chun Duan;Yuan Cheng;K. He;Fumo Yang
通讯作者：
Jihua Tan;Songjun Guo;Yong-liang Ma;Jing-chun Duan;Yuan Cheng;K. He;Fumo Yang