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Acronyms
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Acronym | Definition | AATSR | Advanced Along-Track Scanning Radiometer | ATBD | Algorithm Theoretical Basis Document | ATSR-1, -2 | Along Track Scanning Radiometer | AVHRR | Advanced Very High Resolution Radiometer | C3S | Copernicus Climate Change Service | CC4CL | Community Cloud for CLimate | CCI | (ESA) Climate Change Initiative | CDR | Climate Data Record | CDS | Climate Data Store | CER | Cloud Particle Effective Radius | CFC | Cloud Fractional Cover | COT | Clout Optical Thickness | CPH | Cloud Phase | CTH | Cloud Top Height | CTP | Cloud Top Pressure | CTT | Clout Top Temperature | DARD | Data Access Requirements Document | ECV | Essential Climate Variable | ERS-2 | Environmental Research Satellite | ENVISAT | (the) Environmental Satellite | ESA | European Space Agency | FCDR | Fundamental Climate Data Record | GCOS | Global Climate Observing System | ICDR | Interim Climate Data Record | IWP | Cloud Ice Water Path | LWP | Cloud Liquid Water Path | MODIS | Moderate Resolution Imaging Spectroradiometer | NIR | Near-Infrared | ORAC | Optimal Retrieval of Aerosol and Cloud | PUG | Product User Guide | RAL | Rutherford Appleton Laboratory | SLSTR | Sea and Land Surface Temperature Radiometer | STFC | Science and Technology Facilities Council | UKRI | UK Research and Innovation | WMO | World Meteorological Organisation |
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The list of cloud properties, the variable names used within the NetCDF data files and their units are given in Table 1-2
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Table 1-2: Cloud properties included in Cloud_cci TCDR and SLSTR ICDR monthly products.
Property | Unit | Variable name | Comment |
Cloud fractional cover | - | cfc |
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Cloud-top pressure | hPa | ctp |
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Cloud-top height | km | cth |
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Cloud-top temperature | K | ctt |
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Cloud optical thickness | - | cot | Only retrieved on day-light side of orbit |
Cloud effective radius | µm | cer | Only retrieved on day-light side of orbit |
Cloud liquid water path | gm-2 | lwp | Only retrieved on day-light side of orbit |
Cloud ice water path | gm-2 | iwp | Only retrieved on day-light side of orbit |
For lists and details of known issues and limitations of the data, the user is referred to the referenced ATBDs and papers in Section 1.1. In particular, it should be noted that the monthly mean is computed using data from sun-synchronous polar-orbiting satellites, with a relatively narrow swath. Thus, it cannot be considered a representation of the mean properties of clouds across the whole month for two reasons:
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