DOI: 10.1016/j.atmosenv.2015.09.042
Scopus记录号: 2-s2.0-84942257259
论文题名: Interannual increase of regional haze-fog in North China Plain in summer by intensified easterly winds and orographic forcing
作者: Cao Z ; , Sheng L ; , Liu Q ; , Yao X ; , Wang W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 154
结束页码: 162
语种: 英语
英文关键词: ENSO
; Haze-fog
; Interannual variation
; Orographic forcing
; Summer monsoon
Scopus关键词: Air pollution
; Atmospheric thermodynamics
; Balloons
; Nickel
; Storms
; Wind
; East Asian summer monsoon
; ENSO
; Interannual variation
; Meteorological condition
; Orographic forcing
; Spatio-temporal variation
; Summer monsoon
; Synoptic weather conditions
; Fog
; annual variation
; anomaly
; anthropogenic effect
; anticyclone
; easterly wave
; fog
; haze
; orographic effect
; pollutant
; spatial variation
; synoptic meteorology
; temporal variation
; vorticity
; wind velocity
; zonal flow
; Article
; China
; East Asian
; fog
; haze
; investigative procedures
; meteorology
; motion
; priority journal
; summer
; wind
; China
; Hebei
; North China Plain
; Taihang Mountains
; Yan Shan
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Regional haze-fog events over the North China Plain (NCP) have attracted much attention in recent years. Their increase has been attributed to anthropogenic emissions of air pollutants and synoptic weather conditions. We investigated the influence of local meteorological conditions and large-scale circulation on the haze-fog events over the NCP during 2001-2012, and found a significant interannual increase in the number of summer regional haze-fog days. Analysis indicated that local meteorological conditions could partly explain the increase but failed to explain the spatial variation; meanwhile, regional circulation change induced by large-scale circulation and orographic forcing unveiled a possible spatiotemporal variation mechanism. In summer, the prevalent southerly winds over the NCP were obstructed by the Taihang and Yanshan mountains, steadying the outflow direction to the southeast, while different inflow direction controlled by large-scale circulation had different effects on regional circulation. In weak (strong) East Asian summer monsoon years, an intensified eastward (westward) zonal inflow wind component reinforced (weakened) the negative vorticity and formed an anomalous anticyclone (cyclone), which strengthened (weakened) the downward motion, so the dissipation capability was weakened (strengthened) and the wind speed decreased (increased), ultimately resulting in the increased (decreased) occurrence of haze-fog. We also found that the circulation anomaly had a good relationship with strong El Niño and La Niña events. There was more haze-fog over the NCP in the summers that followed a La Niña event, and less in summers that followed an El Niño event. This suggested the possibility that summer haze-fog phenomena could be predicted based on the phase of ENSO. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81428
Appears in Collections: 气候变化事实与影响
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作者单位: College of Physical and Environmental Oceanography, Ocean University of China, Qingdao, China; Physical Oceanography Laboratory, Ocean University of China, Qingdao, China; Key Laboratory of Ocean-Atmosphere Interaction and Climate of Shandong Province, Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
Recommended Citation:
Cao Z,, Sheng L,, Liu Q,et al. Interannual increase of regional haze-fog in North China Plain in summer by intensified easterly winds and orographic forcing[J]. Atmospheric Environment,2015-01-01,122