Digital Object Identifier
Entry information for CLARA_AVHRR_V001
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DOI for scientific and technical data
10.5676/EUM_SAF_CM/CLARA_AVHRR/V001
Title
CLARA-A1: CM SAF cLouds, Albedo and Radiation dataset from AVHRR data - Edition 1 - Monthly Means / Daily Means / Pentad Means / Monthly Histograms
Citation
Karlsson, Karl-Göran; Riihelä, Aku; Müller, Richard; Meirink, Jan Fokke; Sedlar, Joseph; Stengel, Martin; Lockhoff, Maarit; Trentmann, Jörg; Kaspar, Frank; Hollmann, Rainer; Wolters, Erwin (2012): CLARA-A1: CM SAF cLouds, Albedo and Radiation dataset from AVHRR data - Edition 1 - Monthly Means / Daily Means / Pentad Means / Monthly Histograms, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/CLARA_AVHRR/V001, https://doi.org/10.5676/EUM_SAF_CM/CLARA_AVHRR/V001.
Publisher
Satellite Application Facility on Climate Monitoring (CM SAF)
Publication year
2012
Author(s)
Karlsson, Karl-Göran; Riihelä, Aku; Müller, Richard; Meirink, Jan Fokke; Sedlar, Joseph; Stengel, Martin; Lockhoff, Maarit; Trentmann, Jörg; Kaspar, Frank; Hollmann, Rainer; Wolters, Erwin
Description
The CLARA-A1 dataset is a global dataset of cloud, surface albedo and surface radiation products derived from measurements of the Advanced Very High Resolution Radiometer (AVHRR) onboard the polar orbiting NOAA and Metop satellites. Monthly and daily mean products have been compiled over a time period of 28 years starting in 1982 and ending in 2009. Results are available for individual satellites as well as aggregated for all satellites. Results are provided on two types of grids: one global regular latitude-longitude grid with 0.25 degrees resolution and two equal-area grids covering the polar regions with 25 km resolution (products on the polar grids are restricted to cloud amount and surface albedo). Further extensions, e.g. single- and multi-parameter histograms, and subsets, e.g. daytime-only and night-time only results, are also included.
Format
NetCDF
Version
Edition 1
Size
357 GB
Documentation
- Algorithm Theoretical Basis Document (ATBD) - GAC Surface Radiation, Edition 1
- Algorithm Theoretical Basis Document (ATBD) - AVHRR GAC Surface Albedo, Edition 1
- Algorithm Theoretical Basis Document (ATBD) - AVHRR GAC cloud products, Edition 1
- Algorithm Theoretical Basis Document (ATBD) - Cloud Physical Products AVHRR
- Algorithm Theoretical Basis Document (ATBD) - CM-SAF Product CM-15 and CM-16 Cloud Top (Temperature, Pressure, Height) from AVHRR
- Algorithm Theoretical Basis Document (ATBD) - Joint Cloud property Histogram products AVHRR / SEVIRI
- Product User Manual (PUM) - AVHRR GAC Surface Radiation Products, Edition 1
- Product User Manual (PUM) - AVHRR GAC Surface Albedo, Edition 1
- Product User Manual (PUM) - AVHRR GAC cloud products, Edition 1
- Validation Report - AVHRR GAC cloud products, Edition 1
- Validation Report - AVHRR GAC Surface Radiation, Edition 1
- Validation Report - AVHRR GAC Surface Albedo, Edition 1
Related publications
- Karlsson K.-G., Riihelä, A., Müller, R., Meirink, J. F., Sedlar, J., Stengel, M., Lockhoff, M., Trentmann, J., Kaspar, F., Hollmann R., Wolters, E.: CLARA-A1: the CM SAF cloud, albedo and radiation dataset from 28 yr of global AVHRR data, Atmos. Chem. Phys. Discuss., 13, 935-982, doi:10.5194/acpd-13-935-2013, 2013.
- Riihelä, A., Manninen, T., Laine, V., Andersson, K., and Kaspar, F., 2012, CLARA-SAL: a global 28-yr timeseries of Earth's black-sky surface albedo, Atmos. Chem. Phys. Discuss., 12, 25573-25615, doi:10.5194/acpd-12-25573-2012.
Data record details and ordering
Products from Polar Orbiting Satellites (LEO)
Cloud optical depth (COT)
Cloud phase (CPH)
Cloud radiative effect lw (CFL)
Cloud radiative effect sw (CFS)
Cloud top parameters CTT, CTP and CTH (CTO)
Fractional cloud cover (CFC)
- Monthly mean (Southern Polar Region),
- Monthly mean (Northern Polar Region),
- Monthly mean (Global),
- Daily mean (Global)
Ice water path (IWP)
Joint cloud property histograms (JCH)
Liquid water path (LWP)
Surface albedo (SAL)
- Pentad mean (Southern Polar Region),
- Pentad mean (Global),
- Pentad mean (Northern Polar Region),
- Monthly mean (Southern Polar Region),
- Monthly mean (Global),
- Monthly mean (Northern Polar Region)