DOI: 10.1175/JCLI-D-12-00378.1
Scopus记录号: 2-s2.0-84883182441
论文题名: On the usage of spectral and broadband satellite instrument measurements to differentiate climate models with different cloud feedback strengths
作者: Feldman D.R. ; Coleman D.M. ; Collins W.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 17 起始页码: 6561
结束页码: 6574
语种: 英语
Scopus关键词: Community climate system model
; Continuous measurements
; Intergovernmental panel on climate changes
; Observing system simulation experiments
; Outgoing longwave radiation
; Satellite instruments
; Spectral reflectances
; Visible and near infrared
; Climate change
; Feedback
; Reflection
; Solar radiation
; Climate models
; albedo
; climate feedback
; climate modeling
; longwave radiation
; satellite data
; shortwave radiation
; spectral reflectance
英文摘要: Top-of-atmosphere radiometric signals associated with different high- and low-cloud-radiative feedbacks have been examined through the use of an observing system simulation experiment (OSSE). The OSSE simulates variations in the spectrally resolved and spectrally integrated signals that are due to a range of plausible feedbacks of the climate system when forced withCO2 concentrations that increase at1% yr21. This initial version of the OSSE is based on the Community Climate System Model, version 3 (CCSM3), and exploits the fact that CCSM3 exhibits different cloud feedback strengths for different model horizontal resolutions. In addition to the conventional broadband shortwave albedos and outgoing longwave fluxes, a dataset of shortwave spectral reflectance and longwave spectral radiance has been created. These data have been analyzed to determine simulated satellite instrument signals of poorly constrained cloud feedbacks for three plausible realizations of Earth's climate system produced by CCSM3. These data have been analyzed to estimate the observational record length of albedo, outgoing longwave radiation, shortwave reflectance, or longwave radiance required to differentiate these dissimilar Earth system realizations. Shortwave spectral measurements in visible and near-infrared water vapor overtone lines are best suited to differentiate model results, and a 33% difference in shortwave-cloud feedbacks can be detected with 20 years of continuous measurements. Nevertheless, at most latitudes and with most wavelengths, the difference detection time is more than 30 years. This suggests that observing systems of sufficiently stable calibration would be useful in addressing the contribution of low clouds to the spread of climate sensitivities currently exhibited by the models that report to the Intergovernmental Panel on Climate Change (IPCC). © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51697
Appears in Collections: 气候变化事实与影响
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作者单位: Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA, United States; Earth Sciences Division, Lawrence Berkeley National Laboratory, and Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA, United States
Recommended Citation:
Feldman D.R.,Coleman D.M.,Collins W.D.. On the usage of spectral and broadband satellite instrument measurements to differentiate climate models with different cloud feedback strengths[J]. Journal of Climate,2013-01-01,26(17)