the role of the effective cloud albedo for climate monitoring and analysis
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ID: 223008
2011
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Abstract
Cloud properties and the Earth’s radiation budget are defined as essential climate variables by Global Climate Observing System (GCOS). The cloud albedo is a measure for the portion of solar radiation reflected back to space by clouds. This information is essential for the analysis and interpretation of the Earth’s radiation budget and the solar surface irradiance. We present and discuss a method for the production of the effective cloud albedo and the solar surface irradiance based on the visible channel (0.45–1 μm) on-board of the Meteosat satellites. This method includes a newly developed self-calibration approach and has been used to generate a 23-year long (1983–2005) continuous and validated climate data record of the effective cloud albedo and the solar surface irradiance. Using these records we demonstrate the ability of the method to provide these essential variables in high accuracy and homogeneity. Further on, we discuss the role of the cloud albedo within climate monitoring and analysis. We found trends with opposite sign in the observed effective cloud albedo resulting in positive trends in the solar surface irradiance over ocean and partly negative trends over land. Ground measurements are scarce over the ocean and thus satellite-derived effective cloud albedo and solar surface irradiance constitutes a unique observational data source. Within this scope it has to be considered that the ocean is the main energy reservoir of the Earth, which emphasises the role of satellite-observed effective cloud albedo and derived solar surface irradiance as essential climate variables for climate monitoring and analysis.
| Reference Key |
trger-chatterjee2011remotethe
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|---|---|
| Authors | ;Christine Träger-Chatterjee;Richard Mueller;Jörg Trentmann;Rebekka Posselt;Reto Stökli |
| Journal | Journal of pharmacological sciences |
| Year | 2011 |
| DOI |
10.3390/rs3112305
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| URL | |
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