Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04954-3 |
Synergistic effects of synoptic weather patterns and topography on air quality: a case of the Sichuan Basin of China | |
Ning, Guicai1,2; Yim, Steve Hung Lam1,4,5; Wang, Shigong2,3; Duan, Bolong6; Nie, Canqi7; Yang, Xu8; Wang, Jinyan2; Shang, Kezheng2 | |
2019-12-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53期号:11页码:6729-6744 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Heavy air pollution is strongly influenced by weather conditions and is thus sensitive to climate change. Especially, for the areas with complex topography such as the Sichuan Basin (SB), one of the most polluted areas of China, the synergistic effects of synoptic weather patterns and topography on air quality are unclear and warrant investigation. This study examined the typical synoptic patterns of SB in winter days of 2013-2017 and revealed their synergistic effects with topography on air quality. Three categories of synoptic patterns including dry low-trough, high-pressure, and wet low-vortex patterns accompanying heavy, medium, and slight air pollution, respectively, were identified. In particular, the dry low-trough patterns occur most frequently, accounting for around 62% of the total days. In the case of this pattern, westerly wind prevails over the SB and the aloft atmosphere is warmer than the Tibetan Plateau (TP) at the same height, which induces the cold air over TP moving eastward to the SB. Under the synergistic effects of the cold air eastward movement and TP, a strong descending motion (known as foehn) is observed on the leeward slope of the towering TP. This foehn warming causes a stable layer above the planetary boundary layer (PBL), which suppresses secondary circulation and PBL. These features restrict atmospheric pollutant dispersion, resulting in poor air quality. In contrast, for the high-pressure and wet low-vortex patterns, cold air masses from the north invade southward and cover the northwest SB. This invasion remarkably decreases the atmospheric stability of the lower troposphere, deepens the PBL, and enhances the height of secondary circulation, thereby facilitating air pollutant dispersion. Moreover, the wet low-vortex pattern is accompanied by frequent precipitation events (with 80% rainy days), further bringing down air pollution levels. These findings provide an insight for improving air pollution forecast in the complex terrain areas under global warming. |
英文关键词 | Synoptic weather patterns Complex topography Synergistic effects Air pollution Sichuan Basin Foehn warming |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494681900014 |
WOS关键词 | BOUNDARY-LAYER STRUCTURE ; SURFACE OZONE VARIABILITY ; AEROSOL-INDUCED CHANGES ; PARTICULATE MATTER ; HAZE POLLUTION ; HONG-KONG ; ATMOSPHERIC CONDITIONS ; CIRCULATION PATTERNS ; CLIMATE-CHANGE ; EASTERN CHINA |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/224261 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Shatin, Hong Kong, Peoples R China; 2.Lanzhou Univ, Coll Atmospher Sci, Gansu Key Lab Arid Climate Change & Reducing Disa, Lanzhou 730000, Gansu, Peoples R China; 3.Chengdu Univ Informat Technol, Sch Atmospher Sci, Sichuan Key Lab Plateau Atmosphere & Environm, Chengdu 610225, Sichuan, Peoples R China; 4.Chinese Univ Hong Kong, Dept Geog & Resource Management, Shatin, Hong Kong, Peoples R China; 5.Chinese Univ Hong Kong, Stanley Ho Big Data Decis Analyt Res Ctr, Shatin, Hong Kong, Peoples R China; 6.Lanzhou Cent Meteorol Observ, Lanzhou 730020, Gansu, Peoples R China; 7.Kaizhou Meteorol Bur, Chongqing 405400, Peoples R China; 8.Tianjin Environm Meteorol Ctr, Tianjin 300074, Peoples R China |
推荐引用方式 GB/T 7714 | Ning, Guicai,Yim, Steve Hung Lam,Wang, Shigong,et al. Synergistic effects of synoptic weather patterns and topography on air quality: a case of the Sichuan Basin of China[J]. CLIMATE DYNAMICS,2019,53(11):6729-6744. |
APA | Ning, Guicai.,Yim, Steve Hung Lam.,Wang, Shigong.,Duan, Bolong.,Nie, Canqi.,...&Shang, Kezheng.(2019).Synergistic effects of synoptic weather patterns and topography on air quality: a case of the Sichuan Basin of China.CLIMATE DYNAMICS,53(11),6729-6744. |
MLA | Ning, Guicai,et al."Synergistic effects of synoptic weather patterns and topography on air quality: a case of the Sichuan Basin of China".CLIMATE DYNAMICS 53.11(2019):6729-6744. |
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