RM-OBS/PU Potential Evapotranspiration and Supporting Forcing L4 3-hourly 0.25x0.25 degree V001 (PET_PU_3H025) at GES DISC

Description

The Princeton University MEaSUREs Potential Evapotranspiration (PET) dataset provides a set of estimates of PET based on near surface meteorology and surface radiation data derived from a combination of reanalysis, satellite and gridded gauge data. The rationale of the project is to reduce the error from the input meteorological forcing and provide a variety of widely-used PET methods for different research and application purposes. PET is estimated using three methods: Penman open-water method (Penman), Priestley-Taylor method (PT), Reference crop evapotranspiration using the UN Food and Agricultural Organization approach (FAO). The Penman equation assumes PET occurs from an open water surface and calculates PET based on observations of surface net radiation, near-surface air temperature, wind speed, and specific humidity (Shuttleworth, 1993). The PT equation calculates PET based on surface net radiation and near-surface air temperature and does not account for the aerodynamic component (Priestley and Taylor, 1972). The FAO equation is a specific application of the Penman-Monteith equation for crop and short-grass reference surfaces and is based on surface net radiation, near-surface air temperature, wind speed, and specific humidity (Allen, 1998). This first version of dataset is estimated at a 3 hourly temporal resolution and 0.25x0.25 degrees spatial resolution globally, spanning the 23-year period 1984-2006. Datasets are stored as a 3-dimensional array with dimension 720 x 1440 x 8 for each day, in NetCDF-4 format.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FGPZDZYELYG1A
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/PET_PU_3H025_001.html
21 Access the data via HTTPS. https://measures.gesdisc.eosdis.nasa.gov/data/PET_PU/PET_PU_3H025.001/
34 Sample images of RM-OBS/PU Potential Evapotranspiration 3-hourly 0.25x0.25 Degree [mm] Version 001 for Jan 01, 1984 at 00Z (left) and 12Z (right). https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/PET_PU_3H025_001.png
21 Use the Earthdata Search to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=PET_PU_3H025
21 Access the data via the OPeNDAP protocol. https://measures.gesdisc.eosdis.nasa.gov/opendap/PET_PU/PET_PU_3H025.001/
33 README Document https://measures.gesdisc.eosdis.nasa.gov/data/PET_PU/PET_PU_3H025.001/doc/README.PET_PU_3H025_V001.pdf
21 Hydrology Project Web Site at Princeton University http://hydrology.princeton.edu/data.pgf.php
21 How to read and plot the data. https://disc.gsfc.nasa.gov/information/howto

Tags

  • atmospheric-radiation
  • atmospheric-water-vapor
  • atmosphere
  • atmospheric-temperature
  • atmospheric-pressure
  • atmospheric-winds
  • earth-science

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