DOI: 10.1002/2013JD020644
论文题名: Mesoscale modeling and satellite observation of transport and mixing of smoke and dust particles over northern sub-Saharan African region
作者: Yang Z. ; Wang J. ; Ichoku C. ; Hyer E. ; Zeng J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 21 起始页码: 12139
结束页码: 12157
语种: 英语
英文关键词: Aerosol above cloud
; Aerosol vertical mixing and transport
; MODIS, CALIPSO and AERONET
; Sahel and Sahara
; Smoke and dust
; WRFChem mesoscale modeling
Scopus关键词: Atmospheric aerosols
; Computer simulation
; Dust
; Mixing
; Radiometers
; Satellite imagery
; Weather forecasting
; AERONET
; Aerosol vertical profiles
; Intertropical convergence zone
; Meso-scale modeling
; Moderate resolution imaging spectroradiometer
; Sahel and Sahara
; Vertical mixing
; Weather research and forecasting models
; Smoke
; aerosol composition
; CALIPSO
; dust
; mesoscale meteorology
; MODIS
; optical depth
; pollutant transport
; smoke
; vertical mixing
; Kenya
; Rift Valley
; Sahara
; Sahel [Sub-Saharan Africa]
英文摘要: The transport and vertical distribution of smoke and dust aerosols over the northern sub-Saharan African region are simulated in the Weather Research and Forecasting model with Chemistry (WRF-Chem), which uses hourly dynamic smoke emissions from the Fire Locating and Modeling of Burning Emissions database derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) fire products. Model performance for February 2008 is evaluated using MODIS true color images, aerosol optical depth (AOD) measurements from the Aerosol Robotic Network, MODIS AOD retrievals, and the Cloud-Aerosol Lidar data with Orthogonal Polarization (CALIOP) atmospheric backscattering and extinction products. Specification of smoke injection height of 650 m in WRF-Chem yields aerosol vertical profiles that are most consistent with CALIOP observations of aerosol layer height. Between the equator and 10°N, Saharan dust is often mixed with smoke near the surface, and their transport patterns manifest the interplay of trade winds, subtropical highs, precipitation associated with the Intertropical Convergence Zone, and the high mountains located near the Great Rift Valley region. At the 700 hPa level and above, smoke layers spread farther to the north and south and are often above the dust layers over the Sahel region. In some cases, transported smoke can also be mixed with dust over the Saharan region. Statistically, 5% of the CALIOP valid measurements in February 2007-2011 show aerosol layers either above or between the clouds, reinforcing the importance of the aerosol vertical distribution for quantifying aerosol impact on climate in the Sahel region. Key Points Mesoscale modeling of smoke and dust transport and mixing over the Sahel region Constrain smoke injection and model evaluation with CALIOP, MODIS, and AERONET data Smoke often over the dust/cloud layer in Sahel and can mix with dust over Sahara ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63187
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: Earth and Atmospheric Sciences, University of Nebraska, Lincoln, NE 68588, United States; Climate and Radiation Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Marine Meteorology Division, Naval Research Laboratory, Monterey, CA, United States
Recommended Citation:
Yang Z.,Wang J.,Ichoku C.,et al. Mesoscale modeling and satellite observation of transport and mixing of smoke and dust particles over northern sub-Saharan African region[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(21)