Hourly Downward Longwave Irradiance from GOES Satellite

Downward Longwave Irradiance (DLI) estimates at the Earth's surface, derived from GOES-E geostationary satellite data. The algorithm uses Numerical Weather Prediction model outputs and cloud information to produce clear-sky DLI corrected for cloud cover, remapped to a 0.05-degree regular grid. The dataset is produced by EUMETSAT.

Use Cases

• Modeling surface energy balance by integrating DLI values with other radiative flux measurements.
• Analyzing cloud radiative forcing by comparing clear-sky DLI estimates with cloud-corrected values.
• Studying diurnal cycles of surface heating using the hourly-interpolated irradiance data.
• Validating climate model outputs for surface longwave radiation using satellite-derived DLI over the GOES-E coverage area.

Strengths

• Data is remapped to a consistent 0.05-degree regular grid for spatial analysis.
• Products are interpolated to rounded Universal Time (UT) hours for temporal consistency.
• Algorithm combines clear-sky parameterization with satellite-derived cloud correction.

Limitations

• Pixel observation time varies by up to 24 minutes from north to south, introducing temporal inhomogeneity within a single image.
• Specific row count, temporal coverage, and geographic bounds are not provided in the description.

Provenance

Source

EUMETSAT, derived from GOES-E geostationary satellite data.

Collection Method

Algorithm uses a bulk parameterization of clear-sky DLI from NWP model outputs, corrected with satellite-derived cloud information.

Geography

Coverage area of the GOES-E satellite, data remapped over a regular grid.