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Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1

Overview

DOIhttps://doi.org/10.3334/ORNLDAAC/2129
Version4.4
Project
Published2022-11-01
Updated2022-11-01
Usage715 downloads

Description

This dataset provides Daymet Version 4 R1 data as gridded estimates of daily weather parameters for North America, Hawaii, and Puerto Rico. Daymet variables include the following parameters: minimum temperature, maximum temperature, precipitation, shortwave radiation, vapor pressure, snow water equivalent, and day length. The dataset covers the period from January 1, 1980, to December 31 (or December 30 in leap years) of the most recent full calendar year for the Continental North America and Hawaii spatial regions. Data for Puerto Rico is available starting in 1950. Each subsequent year is processed individually at the close of a calendar year. Daymet variables are provided as individual files, by variable and year, at a 1 km x 1 km spatial resolution and a daily temporal resolution. Areas of Hawaii and Puerto Rico are available as files separate from the continental North America. Data are in a North America Lambert Conformal Conic projection and are distributed in a standardized Climate and Forecast (CF)-compliant netCDF file format. In Version 4 R1 (ver 4.4), all 2020 and 2021 files were updated to improve predictions especially in high-latitude areas. It was found that input files used for deriving 2020 and 2021 data had, for a significant portion of Canadian weather stations, missing daily variable readings for the month of January. NCEI has corrected issues with the Environment Canada ingest feed which led to the missing readings. The revised 2020 and 2021 Daymet V4 R1 files were derived with new GHCNd inputs. Files outside of 2020 and 2021 have not changed from the previous V4 release.

Science Keywords

  • ATMOSPHERE
  • ATMOSPHERIC TEMPERATURE
  • SURFACE TEMPERATURE
  • MAXIMUM/MINIMUM TEMPERATURE
  • ATMOSPHERE
  • PRECIPITATION
  • PRECIPITATION AMOUNT
  • 24 HOUR PRECIPITATION AMOUNT
  • ATMOSPHERE
  • ATMOSPHERIC RADIATION
  • SHORTWAVE RADIATION
  • ATMOSPHERE
  • ATMOSPHERIC WATER VAPOR
  • WATER VAPOR INDICATORS
  • VAPOR PRESSURE
  • ATMOSPHERE
  • PRECIPITATION
  • SNOW WATER EQUIVALENT

Data Use and Citation

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Crosscite Citation Formatter
Thornton, M.M., R. Shrestha, Y. Wei, P.E. Thornton, S-C. Kao, and B.E. Wilson. 2022. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2129

This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use Policy. See our Data Use and Citation Policy for more information.

Data Files

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Companion Files

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Dataset has 1 companion files.

  • Daymet_Daily_V4R1.pdf

Advanced Data Access through THREDDS Data Server

Version History

VersionDataset TitlePublished
2Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 22014-05-15
3.4Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 32016-07-15
4.2Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 42020-12-15
4.4Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R12022-11-01