NOAA's Climate Divisional Database (nCLIMDIV)

nClimDiv (Climate Indices)

browse graphicDivisional Average Temperature Ranks, January-December 2014
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.
  • Cite this dataset when used as a source: 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].
Search Data
Download Data
  • NCEI FTP Server (download)
    Direct Download for Climate Divisional Dataset files
  • KMZ download (download)
    Direct download KMZ files for the data
Distribution Formats
  • TXT
  • MAP
  • KMZ
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Climate Monitoring Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
+1 828-271-4800
cmb.contact@noaa.gov
Time Period 1895-01-01 to Present (time interval: 1-month)
Spatial Bounding Box Coordinates
N: 71.5
S: 24.0
E: -66.0
W: -180.0
Spatial Coverage Map
Dataset Information
General Documentation
  • ClimDiv (Climate Indices) Landing Page
    The U.S. Climate Indices dataset provides data access to U.S. (climate division, state, multi-state regional, and national) temperature, precipitation, degree days, and drought indices from 1895 through current. Text output and static and interactive graphs available.
  • National State of the Climate
    A summary of national and regional temperatures and precipitation, placing the data into a historical perspective.
Associated Resources
  • Improved Historical Temperature and Precipitation Time Series for U.S. Climate Divisions
  • U.S. Climate Divisional Dataset (TCDD)
Publication Dates
  • publication: 2014-03-01
  • revision: 2015-03-15
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency Monthly
Purpose The U.S. Climate Divisional Dataset is the only long-term temporally and spatially complete dataset from 1895 to the present for the Contiguous United States (CONUS) from NCEI. The dataset provides temperature, precipitation and drought indices, as well as heating and cooling degree days. Coverage is provided for U.S. climate divisions, states, multi-state regions, and the nation. Text output, and static and interactive graphs are available.
Use Limitations
  • Data is derived from all observations available at the time of data production.
Dataset Citation
  • Cite this dataset when used as a source: 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].
Cited Authors
  • Vose, Russell S.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Applequist, Scott
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Squires, Mike
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Durre, Imke
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Menne, Matthew J.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Williams, Claude N., Jr.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Fenimore, Chris
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Gleason, Karin
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Arndt, Derek
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Principal Investigators
  • Vose, Russell S.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Collaborators
  • Applequist, Scott
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Squires, Mike
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Durre, Imke
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Menne, Matthew J.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Williams, Claude N., Jr.
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Fenimore, Chris
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Gleason, Karin
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • Arndt, Derek
    DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature
  • Atmosphere > Atmospheric Temperature > Degree Days
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Maximum/Minimum Temperature
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature
  • Atmosphere > Atmospheric Temperature > Temperature Anomalies
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Temperature Tendency
  • Atmosphere > Precipitation > Precipitation Amount
  • Atmosphere > Precipitation > Precipitation Anomalies
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
  • Atmospheric - Surface - Air Temperature
  • Atmospheric - Surface - Precipitation
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • Fixed Observation Stations
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • Thermometers
  • Rain Gauges
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States Of America
Data Resolution keywords Global Change Master Directory (GCMD) Temporal Data Resolution Keywords
  • Monthly Climatology
Use Constraints
  • Cite this dataset when used as a source: 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].
  • 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.
Access Constraints
  • 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.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement This dataset exhibits substantial differences with the previous Climate Divisional Dataset over the period 1895-2013. The first improvement is to the input data, which now include additional station records and contemporary bias adjustments (Menne and Williams, 2009). The second improvement is to the suite of climatic elements, which has been expanded to include both maximum and minimum temperature. The final (and far most extensive) improvement is to the computational methodology, which now addresses topographic and network variability via climatologically aided interpolation (Willmott and Robeson, 1995).
Processing Steps
  • Divisional values in CLIMDIV were derived from area-weighted averages of grid-point estimates interpolated from station data. A nominal grid resolution of 5 km was used to ensure that all divisions had sufficient spatial sampling (only four small divisions had less than 100 points) and because the impact of elevation on precipitation is minimal below 5 km (Sharples et al., 2005). Station data were gridded via climatologically aided interpolation to minimize biases from topographic and network variability (Willmott and Robeson, 1995; Hamlet and Lettenmaier, 2005). In brief, this approach typically requires the creation of three grid types: first-guess grids of climate normals by month, and anomaly grids (i.e., departures from normal) for each year and month, and composite normal/anomaly grids for each year and month. The normal grids capture fine-scale detail using all stations whereas the anomaly grids capture broad departures from average using only the sites available at that time. Because anomalies exhibit less spatial variability than the mean field, the approach is usually viable for sparse networks (New et al., 2000), though some local features (e.g., inversions) may be understated if they do not occur on a climatological basis (Daly, 2006).
  • In March 2015, new Alaska data was included in the nCLIMDIV dataset. 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 dataset. Alaska data only includes the following elements: average temperature, maximum temperature (highs), minimum temperature (lows), and precipitation. National and derived quantities and products are not available for Alaska at this time. Please review documentation for more information.
Source Datasets
  • Gridded 5km GHCN-Daily Temperature and Precipitation Dataset (nCLIMGRID)
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2018-05-25
For questions about the information on this page, please email: ncei.orders@noaa.gov