DOI: 10.1175/JCLI-D-12-00436.1
Scopus记录号: 2-s2.0-84877640820
论文题名: Surface irradiances consistent with CERES-derived top-of-atmosphere shortwave and longwave irradiances
作者: Kato S. ; Loeb N.G. ; Rose F.G. ; Doelling D.R. ; Rutan D.A. ; Caldwell T.E. ; Yu L. ; Weller R.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 9 起始页码: 2719
结束页码: 2740
语种: 英语
Scopus关键词: Atmospheric infrared sounders
; Cloud-aerosol lidar and infrared pathfinder satellite observations
; Clouds and the Earth's radiant energy systems
; Multiple instruments
; Radiative transfer calculations
; Resolution imaging
; Surface observation
; Uncertainty estimates
; Aerosols
; Clouds
; Geostationary satellites
; Image reconstruction
; Infrared devices
; Lagrange multipliers
; NASA
; Optical radar
; Radiometers
; Satellite imagery
; Infrared instruments
; accuracy assessment
; AIRS
; CALIPSO
; CloudSat
; geostationary satellite
; irradiance
; longwave radiation
; MODIS
; radiative transfer
; shortwave radiation
; uncertainty analysis
; Ceres
英文摘要: The estimate of surface irradiance on a global scale is possible through radiative transfer calculations using satellite-retrieved surface, cloud, and aerosol properties as input. Computed top-of-atmosphere (TOA) irradiances, however, do not necessarily agree with observation-based values, for example, from the Clouds and the Earth's Radiant Energy System (CERES). This paper presents amethod to determine surface irradiances using observational constraints of TOA irradiance from CERES. A Lagrange multiplier procedure is used to objectively adjust inputs based on their uncertainties such that the computed TOA irradiance is consistent with CERES-derived irradiance to within the uncertainty. These input adjustments are then used to determine surface irradiance adjustments. Observations by the Atmospheric Infrared Sounder (AIRS), Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO), CloudSat, andModerate Resolution Imaging Spectroradiometer (MODIS) that are a part of the NASA A-Train constellation provide the uncertainty estimates. A comparison with surface observations from a number of sites shows that the bias [root-mean-square (RMS) difference] between computed and observed monthlymean irradiances calculated with 10 years of data is 4.7 (13.3) W m-2 for downward shortwave and -2.5 (7.1) W m-2 for downward longwave irradiances over ocean and -1.7 (7.8) W m-2 for downward shortwave and -1.0 (7.6) W m-2 for downward longwave irradiances over land. The bias andRMS error for the downward longwave and shortwave irradiances over ocean are decreased from those without constraint. Similarly, the bias and RMS error for downward longwave over land improves, although the constraint does not improve downward shortwave over land. This study demonstrates how synergetic use of multiple instruments (CERES,MODIS, CALIPSO, CloudSat, AIRS, and geostationary satellites) improves the accuracy of surface irradiance computations. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51901
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: NASA Langley Research Center, Hampton, VA, United States; Science System and Applications Inc., Hampton, VA, United States; Woods Hole Oceanographic Institution, Woods Hole MA, United States
Recommended Citation:
Kato S.,Loeb N.G.,Rose F.G.,et al. Surface irradiances consistent with CERES-derived top-of-atmosphere shortwave and longwave irradiances[J]. Journal of Climate,2013-01-01,26(9)