QA4ECV: 35 years of daily albedo based on AVHRR and GEO

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.

KHARBOUCHE Said;  MULLER Jan-Peter;  DANNE Olaf;  GOBRON Nadine; 

2018-01-18

Publications Office of the European Union

JRC109316

978-92-79-73527-1,   

1831-9424,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC109316,   

10.2760/383579,