Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

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CALIPSO LIDAR L3 GEWEX Cloud Standard Product Release

CALIPSO LIDAR L3 GEWEX Cloud Standard Product Release

Thursday, December 5, 2019

The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center in collaboration with the CALIPSO mission team announces the release of a new CALIPSO lidar level 3 (L3) Global Energy and Water cycle Experiment (GEWEX) Cloud product. This new data product is a reformatted version of CALIPSO’s contribution to the GEWEX cloud assessment of global cloud datasets from satellites (


The data submitted by the CALIPSO team for this project had to conform to a very specific format; yearly netCDF files organized by parameter. In order to be compatible with other publicly orderable lidar L3 CALIPSO aerosol and cloud products, which are reported as monthly HDF files, this new lidar L3 CALIPSO GEWEX cloud product was created. These files report global distributions of cloud amount and cloud top as averages and histograms on a uniform 2-dimentional (2D) spatial grid. All level 3 parameters are derived from the CALIPSO version 4.x level 2 5 km cloud merged layer products, with a temporal averaging of one month.


• CAL_LID_L3_GEWEX_Cloud-Standard-V1-00           DOI: 10.5067/CALIOP/CALIPSO/LID_L3_GEWEX_Cloud-Standard-V1-00


The monthly products are available beginning with data from June 2006 through December 2016. Information about this new data product including data availability, user documentation and quality statements, relevant links, and tools for working with the data, etc. can be found at the following ASDC link:


An in-depth data quality summary and description can be found in the following CALIPSO links: