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Dataset

 

QA4ECV Global Broadband albedo (1982-2016)

Latest Data Update: 2019-10-11
Status: Pending
Online Status: ONLINE
Publication State: Preview
Publication Date:
THIS RECORD HAS NOT BEEN PUBLISHED YET - PREVIEW ONLY!
Abstract

Global albedo data of the land surface is produced from data from 1982-2016 from European and US satellites, daily and monthly products with estimated uncertainties for every pixel. This data product is produced from AVHRR+GEO Broadband Albedo at 0.5 and 0.05 degrees. This dataset contains Level-3 daily surface broadband albedo products. Level-3 data are raw observations processed to geophysical quantities, and placed onto a regular grid.

Knowledge of albedo is of critical importance to land surface monitoring and modelling, particularly with regard to considerations of climate forecasting and energy exchanges within the biosphere. When albedo is used in models, it has often been specified as a fixed number for some given land cover type. However, many years of monitoring from single instruments, such as MODIS, have shown that it can vary significantly both spatially and temporally. That said, being an angular and spectral integral, it is relatively conservative inter-annually, other than due to factors such as snow and possibly fire and dramatic land cover change (e.g. flooding, urbanisation). As particularly high changes in albedo occur due to the presence of absence of snow, modellers tend to consider these two cases separately: a snow free albedo and one with snow included.

Citable as:  [ PROVISIONAL ] Muller, J.-P.; Danne, O.; Kharbouche, S.; Vermote, E.; Gobron, N.; Schulz, J.; Lattanzio, A.; Doutriaux-Boucher, M.; Aoun, Y.; Lewis, P. (9999): QA4ECV Global Broadband albedo (1982-2016). NERC EDS Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/efb5c580d2774a37acf4515cbc5f7bba/
Abbreviation: Not defined
Keywords: Not defined

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence(s):
http://creativecommons.org/licenses/by/4.0/
When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data are archived as given by the data provider.
Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA).
File Format:
These data are in netCDF4 format. As provided by the QA4ECV project.

Related Documents

 User guide
 ATBD Deliverable report

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-7

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-7

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-8

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-8

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-9

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-9

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-10

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-10

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-11

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-11

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite (GMS-5)

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: METEOSAT-5 or Meteosat Operational Programme 2 (MOP-2)

Instrument/Platform pairings

METEOSAT Visible and IR Imager (MVIRI) Deployed on: METEOSAT-6

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: METEOSAT-6

Instrument/Platform pairings

METEOSAT Visible and IR Imager (MVIRI) Deployed on: METEOSAT-7

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: METEOSAT-7

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite (GMS-5)

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite 1 (GMS-1)

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-9

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-9

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite 2 (GMS-2)

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-10

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-10

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Meteosat Second Generation 1 (MSG-1) or METEOSAT-8

Instrument/Platform pairings

Advanced Very High Resolution Radiometer (AVHRR) Deployed on: NOAA-11

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-11

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite 3 (GMS-3)

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Geostationary Meteorological Satellite 4 (GMS-4)

Computation Element: 1

Title BRDF/Albedo Inversion Model computation for QA4ECV broadband albedo.
Abstract More information needed
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  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - (NIR,SW) alpha correlation term
  • var_id: BHR_alpha_NIR_SW
  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - (VIS,NIR) alpha correlation term
  • var_id: BHR_alpha_VIS_NIR
  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - (VIS,SW) alpha correlation term
  • var_id: BHR_alpha_VIS_SW
  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - NIR band
  • var_id: BHR_NIR
  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - SW band
  • var_id: BHR_SW
  • units: 1
  • long_name: Bi-Hemisphere Reflectance albedo - VIS band
  • var_id: BHR_VIS
  • units: 1
  • long_name: Data Mask
  • var_id: Data_Mask
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - (NIR,SW) alpha correlation term
  • var_id: DHR_alpha_NIR_SW
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - (VIS,NIR) alpha correlation term
  • var_id: DHR_alpha_VIS_NIR
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - (VIS,SW) alpha correlation term
  • var_id: DHR_alpha_VIS_SW
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - NIR band
  • var_id: DHR_NIR
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - SW band
  • var_id: DHR_SW
  • units: 1
  • long_name: Directional Hemisphere Reflectance albedo - VIS band
  • var_id: DHR_VIS
  • units: 1
  • long_name: Goodness of Fit
  • var_id: Goodness_of_Fit
  • units: 1
  • long_name: Prior valid pixel flag
  • var_id: Prior_Valid_Pixel_Flag
  • units: 1
  • long_name: Relative Entropy
  • var_id: Relative_Entropy
  • units: 1
  • long_name: Snow Fraction
  • var_id: Snow_Fraction_of_Samples
  • units: degrees
  • long_name: Solar Zenith Angle
  • var_id: Solar_Zenith_Angle
  • units: 1
  • long_name: Uncertainty of Bi-Hemisphere Reflectance albedo - NIR band
  • var_id: BHR_sigma_NIR
  • units: 1
  • long_name: Uncertainty of Bi-Hemisphere Reflectance albedo - SW band
  • var_id: BHR_sigma_SW
  • units: 1
  • long_name: Uncertainty of Bi-Hemisphere Reflectance albedo - VIS band
  • var_id: BHR_sigma_VIS
  • units: 1
  • long_name: Uncertainty of Directional Hemisphere Reflectance albedo - NIR band
  • var_id: DHR_sigma_NIR
  • units: 1
  • long_name: Uncertainty of Directional Hemisphere Reflectance albedo - SW band
  • var_id: DHR_sigma_SW
  • units: 1
  • long_name: Uncertainty of Directional Hemisphere Reflectance albedo - VIS band
  • var_id: DHR_sigma_VIS
  • units: 1
  • long_name: Weighted number of albedo samples
  • var_id: Weighted_Number_of_Samples
  • units: degrees
  • var_id: lat
  • long_name: latitude coordinate
  • units: degrees
  • var_id: lon
  • long_name: longitude coordinate

Co-ordinate Variables

  • standard_name: time
  • var_id: time
Coverage
Temporal Range
Start time:
1982-01-01T00:00:00
End time:
2016-12-31T00:00:00
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (10)
Publishers (1)
Funders (1)