DOI: 10.1016/j.atmosenv.2014.11.034
Scopus记录号: 2-s2.0-84912020143
论文题名: Regional characteristics of the relationship between columnar AOD and surface PM2.5: Application of lidar aerosol extinction profiles over Baltimore-Washington Corridor during DISCOVER-AQ
作者: Chu D ; A ; , Ferrare R ; , Szykman J ; , Lewis J ; , Scarino A ; , Hains J ; , Burton S ; , Chen G ; , Tsai T ; , Hostetler C ; , Hair J ; , Holben B ; , Crawford J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 101 起始页码: 338e349
语种: 英语
英文关键词: AERONET
; Aerosol mixing layer
; AOD
; Baltimore-Washington Corridor
; DISCOVER-AQ
; DRAGON
; Haze layer height
; HSRL
; MODIS
; MPLNET
; PM2.5
Scopus关键词: Air quality
; Atmospheric aerosols
; Mean square error
; Mixing
; NASA
; Radiometers
; Remote sensing
; Spectral resolution
; AERONET
; Aerosol mixing
; AOD
; DISCOVER-AQ
; DRAGON
; Haze layer
; HSRL
; MODIS
; MPLNET
; Washington
; Optical radar
; aerosol
; air quality
; airborne sensor
; contaminated land
; field method
; lidar
; optical depth
; particulate matter
; remote sensing
; aerosol
; air quality
; Article
; coastal waters
; haze
; height
; humidity
; hydration
; measurement
; optical depth
; particulate matter
; remote sensing
; surface property
; United States
; Baltimore
; District of Columbia
; Maryland
; United States
; Washington [District of Columbia]
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: The first field campaign of DISCOVER-AQ (Deriving Information on Surface conditions from COlumn and VERtically resolved observations relevant to Air Quality) took place in July 2011 over Baltimore-Washington Corridor (BWC). A suite of airborne remote sensing and in-situ sensors was deployed along with ground networks for mapping vertical and horizontal distribution of aerosols. Previous researches were based on a single lidar station because of the lack of regional coverage. This study uses the unique airborne HSRL (High Spectral Resolution Lidar) data to baseline PM2.5 (particulate matter of aerodynamic diameter less than 2.5μm) estimates and applies to regional air quality with satellite AOD (Aerosol Optical Depth) retrievals over BWC (~6500km2). The linear approximation takes into account aerosols aloft above AML (Aerosol Mixing Layer) by normalizing AOD with haze layer height (i.e., AOD/HLH). The estimated PM2.5 mass concentrations by HSRL AOD/HLH are shown within 2 RMSE (Root Mean Square Error ~9.6μg/m3) with correlation ~0.88 with the observed over BWC. Similar statistics are shown when applying HLH data from a single location over the distance of 100km. In other words, a single lidar is feasible to cover the range of 100km with expected uncertainties. The employment of MPLNET-AERONET (MicroPulse Lidar NETwork - AErosol RObotic NETwork) measurements at NASA GSFC produces similar statistics of PM2.5 estimates as those derived by HSRL. The synergy of active and passive remote sensing aerosol measurements provides the foundation for satellite application of air quality on a daily basis. For the optimal range of 10km, the MODIS-estimated PM2.5 values are found satisfactory at 27 (out of 36) sunphotometer locations with mean RMSE of 1.6-3.3μg/m3 relative to PM2.5 estimated by sunphotometers. The remaining 6 of 8 marginal sites are found in the coastal zone, for which associated large RMSE values ~4.5-7.8μg/m3 are most likely due to overestimated AOD because of water-contaminated pixels. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82086
Appears in Collections: 气候变化事实与影响
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作者单位: University of Maryland Baltimore County, Baltimore, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Science Directorate, NASA Langley Research Center, Hampton, VA, United States; US EPA, Research Triangle ParkNC, United States; Maryland Department of Environment, Baltimore, MD, United States; University of Maryland, College Park, MD, United States; National Taiwan University, Taipei, Taiwan
Recommended Citation:
Chu D,A,, Ferrare R,et al. Regional characteristics of the relationship between columnar AOD and surface PM2.5: Application of lidar aerosol extinction profiles over Baltimore-Washington Corridor during DISCOVER-AQ[J]. Atmospheric Environment,2015-01-01,101