NOAA's Climate Divisional Database (nCLIMDIV)

This dataset replaces the previous Time Bias Corrected Divisional Temperature-Precipitation Drought Index. The new divisional data set (nCLIMDIV) is based on the Global Historical Climatological Network-Daily (GHCN-D) and makes use of several improvements to the previous data set. For the input data, improvements include additional station networks, quality assurance reviews and temperature bias adjustments. Perhaps the most extensive improvement is to the computational approach, which now employs climatologically aided interpolation. This 5km grid based calculation nCLIMGRID helps to address topographic and network variability. This data set is primarily used by the National Oceanic and Atmospheric Administration (NOAA) National Climatic Data Center (NCDC) to issue State of the Climate Reports on a monthly basis. These reports summarize recent temperature and precipitation conditions and long-term trends at a variety of spatial scales, the smallest being the climate division level. Data at the climate division level are aggregated to compute statewide, regional and national snapshots of climate conditions. For CONUS, the period of record is from 1895-present. Derived quantities such as Standardized precipitation Index (SPI), Palmer Drought Indices (PDSI, PHDI, PMDI, and ZNDX) and degree days are also available for the CONUS sites.

In March 2015, data for thirteen Alaskan climate divisions were added to the nCLIMDIV data set. Data for the new Alaskan climate divisions begin in 1925 through the present and are included in all nCLIMDIV monthly updates. Alaskan climate data include the following elements for divisional and statewide coverage: average temperature, maximum temperature (highs), minimum temperature (lows), and precipitation. The Alaska nCLIMDIV data were created and updated using similar methodology as that for the CONUS, but with a different approach to establishing the underlying climatology. The Alaska data are built upon the 1971-2000 PRISM averages whereas the CONUS values utilize a base climatology derived from the nCLIMGRID data set.

As of November 2018, nClimDiv includes county data and additional inventory files.

Data and Resources

Additional Info

Field Value
Last Updated January 30, 2019, 10:47
Created June 7, 2017, 23:06
access_constraints ["Cite as: Vose, Russell S.; Applequist, Scott; Squires, Mike; Durre, Imke; Menne, Matthew J.; Williams, Claude N., Jr.; Fenimore, Chris; Gleason, Karin; Arndt, Derek (2014): NOAA's Gridded Climate Divisional Dataset (CLIMDIV). [indicate subset used]. NOAA National Climatic Data Center. doi:10.7289/V5M32STR [access date].", "Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.", "Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose."]
bbox-east-long -66.0
bbox-north-lat 71.5
bbox-south-lat 24.0
bbox-west-long -180.0
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2014-03-01"}, {"type": "revision", "value": "2015-03-15"}, {"type": "revision", "value": "2018-11-15"}]
frequency-of-update monthly
graphic-preview-description Divisional Average Temperature Ranks, January-December 2014
graphic-preview-type GIF
guid gov.noaa.ncdc:C00005
licence ["Data is derived from all observations available at the time of data production."]
metadata-date 2018-12-19
progress onGoing
resource-type dataset
responsible-party [{"name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-180.0, 24.0], [-66.0, 24.0], [-66.0, 71.5], [-180.0, 71.5], [-180.0, 24.0]]]}
spatial_harvester true
temporal-extent-begin 1895-01-01