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    Author(s): Daniel Barandiaran; S.-Y. Simon Wang; R. Justin DeRose
    Date: 2017
    Source: Water. 9: 403.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (1.0 MB)

    Description

    Snowpack observations in the Intermountain West are sparse and short, making them difficult for use in depicting past variability and extremes. This study presents a reconstruction of April 1 snow water equivalent (SWE) for the period of 1850–1989 using increment cores collected by the U.S. Forest Service, Interior West Forest Inventory and Analysis program (FIA). In the state of Utah, SWE was reconstructed for 38 snow course locations using a combination of standardized tree-ring indices derived from both FIA increment cores and publicly available tree-ring chronologies. These individual reconstructions were then interpolated to a 4-km grid using an objective analysis with elevation correction to create an SWE product. The results showed a significant correlation with observed SWE as well as good correspondence to regional tree-ring-based drought reconstructions. Diagnostic analysis showed statewide coherent climate variability on inter-annual and inter-decadal time-scales, with added geographical details that would not be possible using courser pre-instrumental proxy datasets. This SWE reconstruction provides water resource managers and forecasters with better spatial resolution to examine past variability in snowpack, which will be important as future hydroclimatic variability is amplified by climate change.

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    Citation

    Barandiaran, Daniel; Simon Wang, S.-Y.; DeRose, R. Justin. 2017. Gridded snow water equivalent reconstruction for Utah using Forest Inventory and Analysis tree-ring data. Water. 9: 403.

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    Keywords

    climate variability, dendrochronology, Forest Inventory and Analysis, paleohydrology, snow water equivalent, tree rings, water resource management

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https://www.fs.usda.gov/treesearch/pubs/54504