DOI: 10.1002/jgrd.50309
论文题名: Enhanced vertical mixing associated with a nocturnal cold front passage and its impact on near-surface temperature and ozone concentration
作者: Hu X.-M. ; Klein P.M. ; Xue M. ; Shapiro A. ; Nallapareddy A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 7 起始页码: 2714
结束页码: 2728
语种: 英语
Scopus关键词: Atmospheric chemistry
; Atmospheric temperature
; Computer simulation
; Ozone
; Surface properties
; Weather forecasting
; Near surface temperature
; Ozone concentration
; Potential impacts
; Radiative cooling
; Surface temperatures
; Temperature inversions
; Turbulent mixing
; Weather research and forecasting models
; Ozone layer
; air temperature
; atmospheric chemistry
; cold front
; dry deposition
; ozone
; surface temperature
; turbulent mixing
; vertical mixing
; warming
; weather forecasting
; wind shear
; Oklahoma [United States]
; United States
英文摘要: A sudden rise in surface temperature is sometimes observed during the nighttime hours with the passage of cold fronts. The physics contributing to such nocturnal warming events and their potential impacts on atmospheric chemistry are not yet fully understood. In this study, a nocturnal warming event associated with a cold front passage in Oklahoma on 3 April 2006 is simulated with the Weather Research and Forecasting model with Chemistry (WRF/Chem). During the prefrontal period under clear-sky and calm conditions, surface radiative cooling resulted in a decoupled shallow surface layer in which air temperature and wind speed decreased quickly and ozone was removed efficiently by chemical reactions. During the passage of the cold front, strong wind shear enhanced turbulent mixing, which weakened the temperature inversion near the surface. Warmer and ozone-richer air from aloft was mixed downward to the surface. Thus, a sudden warming and nocturnal secondary ozone maxima were observed near the surface. Dry deposition of ozone at the surface was also enhanced in this warming event. © 2013. American Geophysical Union. All Rights Reserved. 资助项目: AGS-0750790
; AGS-0802888
; AGS-0941491
; AGS-1046081
; AGS-1046171
; ATM 0547882
; OCI-0905040
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63848
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Center for Analysis and Prediction of Storms, University of Oklahoma, Norman, OK 73072, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; Weathernews Inc., Norman, OK, United States
Recommended Citation:
Hu X.-M.,Klein P.M.,Xue M.,et al. Enhanced vertical mixing associated with a nocturnal cold front passage and its impact on near-surface temperature and ozone concentration[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(7)