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Extended AVHRR Polar Pathfinder (APP-x)

Sample product image of NOAA CDR Extended AVHRR Polar Pathfinder (APP-x). It depicts mean surface albedo over the norther hemisphere during September 2014 at 1400 local standard time.

This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) of Extended, Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder (APP-x).

This NOAA CDR of the Extended AVHRR Polar Pathfinder cryosphere contains several geophysical variables over the Arctic and Antarctic for the period 1982 - present.

Data Variables

  • Snow
  • Ice
  • Land
  • Surface Albedo
  • Sea Ice Thickness
  • Surface Type Cloud Mask
  • Cloud Particle Thermodynamic Phase
  • Cloud Optical Depth
  • Cloud Particle Effective Radius
  • Cloud Temperature
  • Cloud Pressure
  • Cloud Type
  • Downwelling Shortwave Radiation at the Surface
  • Downwelling Longwave Radiation at the Surface
  • Upwelling Shortwave Radiation at the Surface
  • Upwelling Longwave Radiation at the Surface
  • Upwelling Shortwave Radiation at the TOA
  • Upwelling Longwave Radiation at the TOA
  • Shortwave Cloud Radiative Forcing at the Surface
  • Longwave Cloud Radiative Forcing at the Surface

APP-x data products are mapped to a 25 km EASE grid at two local solar times: 04:00 and 14:00 for the Arctic, and 02:00 and 14:00 for the Antarctica. Using local solar time rather than standard UTC times provides better information on diurnal differences at all locations.

Principal Investigator: Jeffrey Key, University of Wisconsin

Cite dataset when used as a source. See the dataset's DOI landing page for citation details at doi:10.7289/V5MK69W6.