Uncertainty in Satellite-Derived Surface Irradiances and Challenges in Producing Surface Radiation Budget Climate Data Record
Autor: | Alexander Radkevich, David A. Rutan, Seiji Kato, Xianglei Huang, Antonio Viudez-Mora, David Fillmore, Fred G. Rose, Thomas E. Caldwell, Seung-Hee Ham, Tyler J. Thorsen |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
010504 meteorology & atmospheric sciences
Science 0211 other engineering and technologies Irradiance 02 engineering and technology Sensible heat Atmospheric sciences 01 natural sciences Physics::Geophysics Atmosphere surface radiation budget Precipitation Astrophysics::Galaxy Astrophysics 021101 geological & geomatics engineering 0105 earth and related environmental sciences regional monthly mean variability Anomaly (natural sciences) Longwave Northern Hemisphere Physics::Space Physics General Earth and Planetary Sciences Environmental science Astrophysics::Earth and Planetary Astrophysics Shortwave |
Zdroj: | Remote Sensing; Volume 12; Issue 12; Pages: 1950 Remote Sensing, Vol 12, Iss 1950, p 1950 (2020) |
ISSN: | 2072-4292 |
DOI: | 10.3390/rs12121950 |
Popis: | The Clouds and the Earth’s Radiant Energy System (CERES) Energy Balanced and Filled (EBAF) Edition 4.1 data product provides global surface irradiances. Uncertainties in the global and regional monthly and annual mean all-sky net shortwave, longwave, and shortwave plus longwave (total) irradiances are estimated using ground-based observations. Error covariance is derived from surface irradiance sensitivity to surface, atmospheric, cloud and aerosol property perturbations. Uncertainties in global annual mean net shortwave, longwave, and total irradiances at the surface are, respectively, 5.7 Wm−2, 6.7 Wm−2, and 9.7 Wm−2. In addition, the uncertainty in surface downward irradiance monthly anomalies and their trends are estimated based on the difference derived from EBAF surface irradiances and observations. The uncertainty in the decadal trend suggests that when differences of decadal global mean downward shortwave and longwave irradiances are, respectively, greater than 0.45 Wm−2 and 0.52 Wm−2, the difference is larger than 1σ uncertainties. However, surface irradiance observation sites are located predominately over tropical oceans and the northern hemisphere mid-latitude. As a consequence, the effect of a discontinuity introduced by using multiple geostationary satellites in deriving cloud properties is likely to be excluded from these trend and decadal change uncertainty estimates. Nevertheless, the monthly anomaly timeseries of radiative cooling in the atmosphere (multiplied by −1) agrees reasonably well with the anomaly time series of diabatic heating derived from global mean precipitation and sensible heat flux with a correlation coefficient of 0.46. |
Databáze: | OpenAIRE |
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