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|Title:||QA4ECV: 35 years of daily albedo based on AVHRR and GEO|
|Authors:||KHARBOUCHE SAID; MULLER JAN-PETER; DANNE OLAF; GOBRON NADINE|
|Publisher:||Publications Office of the European Union|
|Type:||Articles in periodicals and books|
|Abstract:||One of the objectives of the EU-FP7 project QA4ECV (Quality Assurance for Essential Climate variables, www.qa4ecv.eu, under contract No 607405) project is to produce a long and consistent data record of global surface albedo. Thus, level- 1 and level-2 data from several sensors, namely NOAA-AVHRR, several geostationary satellites and MODIS have been collected and pre-processed to ingest into our optimal estimation algorithm. Our primary output product is a daily global map of two types of albedo bi-hemispherical diffuse reflectance known colloquially as white sky albedo and direct hemispherical reflectance known as black sky albedo over three broadbands (vis: 0.4 − 0.7μm; nir: 0.7 − 3μm; sw: 0.4 − 3μm) and, with a spatial resolution of 0.05◦ × 0.05◦. From this product, we derive other up-scaled products such as monthly and 0.5◦ × 0.5◦. The inter-comparison against third party products and in-situ data show a very good overall agreement and confirm the accuracy and the consistency of our output albedos.|
|JRC Directorate:||Sustainable Resources|
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