Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL086530 |
Ramp-Like PM2.5 Accumulation Process and Z-Less Similarity in the Stable Boundary Layer | |
Shi, Yu1; Hu, Fei1,2 | |
2020-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Similar ramp-like structures exist in the time variations of surface PM2.5 accumulation during the four different heavy haze pollution processes in Beijing, from 3 November 2017 to 15 January 2018. Based on the ultrasonic anemometer observations at seven different altitudes on a 325 m tower, it is shown that turbulence momentum flux exchanges between different altitudes were very weak during the ramp period of PM2.5 concentration. Turbulence at the higher altitude associated with strong wind shear, occasionally mixed downward toward the surface, showing upside-down transportation of turbulent kinetic energy (TKE), especially during the rapid removal stage of the pollution. This was different from the traditional upward TKE transportation above the surface. Vertical distribution of nondimensionalized standard deviation of the horizontal velocity, vertical velocity, and potential temperature in the stable boundary layer within the ramp-like structure show obvious "z-less" similarity, independent of z, and almost equal to constants (sigma(u)/u(*integral) similar to 3.9, sigma(w)/u(*integral) similar to 1.52, and sigma(theta)/T-* similar to 3.96). |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529107400023 |
WOS关键词 | NORTH CHINA PLAIN ; TEMPERATURE RAMPS ; SURFACE-LAYER ; HAZE EPISODE ; WINTER HAZE ; TURBULENCE ; POLLUTION ; WAVE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/279628 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Shi, Yu,Hu, Fei. Ramp-Like PM2.5 Accumulation Process and Z-Less Similarity in the Stable Boundary Layer[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(3). |
APA | Shi, Yu,&Hu, Fei.(2020).Ramp-Like PM2.5 Accumulation Process and Z-Less Similarity in the Stable Boundary Layer.GEOPHYSICAL RESEARCH LETTERS,47(3). |
MLA | Shi, Yu,et al."Ramp-Like PM2.5 Accumulation Process and Z-Less Similarity in the Stable Boundary Layer".GEOPHYSICAL RESEARCH LETTERS 47.3(2020). |
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