DOI: 10.1016/j.atmosenv.2014.04.021
Scopus记录号: 2-s2.0-84899822083
论文题名: Simultaneous retrieval of aerosol properties and clear-sky direct radiative effect over the global ocean from MODIS
作者: Lee J ; , Kim J ; , Lee Y ; G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 309
结束页码: 317
语种: 英语
英文关键词: Aerosol
; Direct radiative effect
; MODIS
; Ocean
; Radiative forcing
Scopus关键词: Aerosols
; Algorithms
; Atmospheric aerosols
; Atmospheric radiation
; Oceanography
; Radiometers
; Uncertainty analysis
; Aerosol optical depths
; Chemical transport models
; Moderate resolution imaging spectroradiometer
; MODIS
; Ocean
; Radiative effects
; Radiative forcings
; Radiative transfer model
; Satellite imagery
; aerosol
; algorithm
; article
; atmosphere
; biomass
; calibration
; cloud
; cooling
; information retrieval
; Northern Hemisphere
; priority journal
; radiation detector
; satellite imagery
; sea
; simulation
; Southern Hemisphere
; validity
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: A unified satellite algorithm is presented to simultaneously retrieve aerosol properties (aerosol optical depth; AOD and aerosol type) and clear-sky shortwave direct radiative effect (hereafter, DREA) over ocean. The algorithm is applied to Moderate Resolution Imaging spectroradiometer (MODIS) observations for a period from 2003 to 2010 to assess the DREA over the global ocean. The simultaneous retrieval utilizes lookup table (LUT) containing both spectral reflectances and solar irradiances calculated using a single radiative transfer model with the same aerosol input data. This study finds that aerosols cool the top-of-atmosphere (TOA) and bottom-of-atmosphere (BOA) by 5.2±0.5W/m2 and 8.3W/m2, respectively, and correspondingly warm the atmosphere (hereafter, ATM) by 3.1W/m2. These quantities, solely based on the MODIS observations, are consistent with those of previous studies incorporating chemical transport model simulations and satellite observations. However, the DREAs at BOA and ATM are expected to be less accurate compared to that of TOA due to low sensitivity in retrieving aerosol type information, which is related with the atmospheric heating by aerosols, particularly in low AOD conditions; consequently, the uncertainties could not be quantified. Despite the issue in the aerosol type information, the present method allows us to confine the DREA attributed only to fine-mode dominant aerosols, which are expected to be mostly anthropogenic origin, in the range from-1.1W/m2 to-1.3W/m2 at TOA. Improvements in size-resolved AOD and SSA retrievals from current and upcoming satellite instruments are suggested to better assess the DREA, particularly at BOA and ATM, where aerosol absorptivity induces substantial uncertainty. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80898
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Earth, Astronomy and Atmosphere, Brain Korea 21 Program, Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
Recommended Citation:
Lee J,, Kim J,, Lee Y,et al. Simultaneous retrieval of aerosol properties and clear-sky direct radiative effect over the global ocean from MODIS[J]. Atmospheric Environment,2014-01-01,92