Mapping Atmospheric Moisture Climatologies across the Conterminous United States.

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  • Author(s): Daly C;Daly C; Smith JI; Smith JI; Olson KV; Olson KV
  • Source:
    PloS one [PLoS One] 2015 Oct 20; Vol. 10 (10), pp. e0141140. Date of Electronic Publication: 2015 Oct 20 (Print Publication: 2015).
  • Publication Type:
    Journal Article; Research Support, Non-U.S. Gov't
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
    • Publication Information:
      Original Publication: San Francisco, CA : Public Library of Science
    • Subject Terms:
      Humidity* ; Models, Theoretical*; Environmental Monitoring/*methods ; Meteorology/*methods; Climate ; Temperature ; United States
    • Abstract:
      Spatial climate datasets of 1981-2010 long-term mean monthly average dew point and minimum and maximum vapor pressure deficit were developed for the conterminous United States at 30-arcsec (~800m) resolution. Interpolation of long-term averages (twelve monthly values per variable) was performed using PRISM (Parameter-elevation Relationships on Independent Slopes Model). Surface stations available for analysis numbered only 4,000 for dew point and 3,500 for vapor pressure deficit, compared to 16,000 for previously-developed grids of 1981-2010 long-term mean monthly minimum and maximum temperature. Therefore, a form of Climatologically-Aided Interpolation (CAI) was used, in which the 1981-2010 temperature grids were used as predictor grids. For each grid cell, PRISM calculated a local regression function between the interpolated climate variable and the predictor grid. Nearby stations entering the regression were assigned weights based on the physiographic similarity of the station to the grid cell that included the effects of distance, elevation, coastal proximity, vertical atmospheric layer, and topographic position. Interpolation uncertainties were estimated using cross-validation exercises. Given that CAI interpolation was used, a new method was developed to allow uncertainties in predictor grids to be accounted for in estimating the total interpolation error. Local land use/land cover properties had noticeable effects on the spatial patterns of atmospheric moisture content and deficit. An example of this was relatively high dew points and low vapor pressure deficits at stations located in or near irrigated fields. The new grids, in combination with existing temperature grids, enable the user to derive a full suite of atmospheric moisture variables, such as minimum and maximum relative humidity, vapor pressure, and dew point depression, with accompanying assumptions. All of these grids are available online at http://prism.oregonstate.edu, and include 800-m and 4-km resolution data, images, metadata, pedigree information, and station inventory files.
    • References:
      Ecol Appl. 2009 Jun;19(4):1003-21. (PMID: 19544740)
      Tree Physiol. 2014 Oct;34(10):1047-55. (PMID: 25413023)
    • Publication Date:
      Date Created: 20151021 Date Completed: 20160607 Latest Revision: 20181113
    • Publication Date:
      20231215
    • Accession Number:
      PMC4618743
    • Accession Number:
      10.1371/journal.pone.0141140
    • Accession Number:
      26485026