Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-7997-2017 |
Opposite long-term trends in aerosols between low and high altitudes: a testimony to the aerosol-PBL feedback | |
Dong, Zipeng1,2,3; Li, Zhanqing1,2,4; Yu, Xing3; Cribb, Maureen4; Li, Xingmin3; Dai, Jin3 | |
2017-06-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Interactions between absorbing aerosols and the planetary boundary layer (PBL) play an important role in affecting air pollution near the surface. In this study, a unique feature of the aerosol-PBL interaction is identified that has important implications in monitoring and combating air pollution. Opposite trends in aerosol loading between the lower and upper PBL are shown on a wide range of timescales and data acquired by various platforms: from a short-term field experiment to decadal satellite observations and multidecadal ground observations in China. A novel method is proposed to obtain the vertical profiles of aerosol loading from passive sensors by virtue of varying elevations. The analyses of visibility, aerosol optical depth, and extinction with different temporal scales exhibit the similar trend, i.e., increasing in the lower atmosphere but decreasing in the upper atmosphere. Integration of the reversal aerosol trend below and above the PBL resulted in a much less change in the column-integrated quantities. The surface cooling effect, together with the change in the heating rate induced by the absorbing aerosol, unevenly modifies the atmospheric temperature profile, causing a more stable atmosphere inside the PBL but a destabilized atmosphere above the PBL. Such a change in the atmospheric stability favors the accumulation of pollutants near the surface and the vertical diffusion of aerosol particles in the upper atmosphere, both of which are consistent with the observed reversal aerosol trends. These findings have multiple implications in understanding and combating air pollution, especially in many developing countries with high emissions of light-absorbing aerosols. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404771300007 |
WOS关键词 | PEARL RIVER-DELTA ; BLACK CARBON ; AIR-POLLUTION ; OPTICAL DEPTH ; HAZE POLLUTION ; CHINA ; ABSORPTION ; IMPACTS ; PRECIPITATION ; CLIMATOLOGY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28409 |
专题 | 地球科学 |
作者单位 | 1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 2.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China; 3.Meteorol Inst Shaanxi Prov, Xian 710014, Peoples R China; 4.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Dong, Zipeng,Li, Zhanqing,Yu, Xing,et al. Opposite long-term trends in aerosols between low and high altitudes: a testimony to the aerosol-PBL feedback[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(12). |
APA | Dong, Zipeng,Li, Zhanqing,Yu, Xing,Cribb, Maureen,Li, Xingmin,&Dai, Jin.(2017).Opposite long-term trends in aerosols between low and high altitudes: a testimony to the aerosol-PBL feedback.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(12). |
MLA | Dong, Zipeng,et al."Opposite long-term trends in aerosols between low and high altitudes: a testimony to the aerosol-PBL feedback".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.12(2017). |
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