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Title: Snowpack-climate manipulation using infrared heaters in subalpine forests of the Southern Rocky Mountains, USA

Journal Article · · Agricultural and Forest Meteorology
 [1];  [2];  [3];  [4];  [5]
  1. Univ. of Colorado, Boulder, CO (United States). Inst. of Arctic and Alpine Research
  2. Univ. of Colorado, Boulder, CO (United States). Dept. of Geography, Inst. of Arctic and Alpine Research; California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Jet Propulsion Lab.
  3. Univ. of Colorado, Boulder, CO (United States). Dept. of Geography
  4. Univ. of Saskatchewan, Saskatoon, SK (Canada)
  5. Univ. of California, Merced, CA (United States). Sierra Nevada Research Inst.

Effects of infrared heaters on snow accumulation, snowmelt, and snow–atmosphere energy exchange were examined at Niwot Ridge, Colorado (CO) and compared to a naturally warmer, but otherwise similar subalpine site in the Valles Caldera National Preserve, New Mexico (NM). Observed snow accumulation was 30% lower on average and snow melted out 16 days earlier in the heated plots compared to the controls. Soil temperature during snowmelt was 3 °C greater on average and soil moisture was 4% lower on average in heated plots compared to controls. In NM, snow accumulation was 23% lower, snow melted 23 days earlier, soil temperature was 0.6 °C greater, and soil moisture was 13% lower on average relative to CO controls. In order to estimate differences in energy and mass balance fluxes at the snow–atmosphere interface in control versus warmer plots, the 1-D, physically based snowmelt model, SNOWPACK, was used. Model results indicated that heaters alter radiative, turbulent and mass fluxes by amounts comparable to the differences between CO and NM fluxes. The proportion of the energy flux associated with latent heat exchange during snowmelt was 9–27% of the total energy flux in heated models and 19–22% of NM models compared to 3–7% in control models. Thus, sublimation loss to the atmosphere was greater in both experimentally and naturally warmer cases relative to the control case. We conclude that IR heaters can provide alterations to the timing and magnitude of snow accumulation and snowmelt consistent with conditions observed at a warmer analog site and with climate and hydrology model projections. Finally, impacts of IR heating on energy partitioning and sublimation should be considered when designing manipulations of the snowpack, as reductions in snowmelt water may alter biological or ecological processes.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1512184
Alternate ID(s):
OSTI ID: 1249757
Journal Information:
Agricultural and Forest Meteorology, Vol. 203, Issue C; ISSN 0168-1923
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (9)

Observations and simulations of the seasonal evolution of snowpack cold content and its relation to snowmelt and the snowpack energy budget journal January 2018
Seed origin and warming constrain lodgepole pine recruitment, slowing the pace of population range shifts journal September 2017
The sensitivity of modeled snow accumulation and melt to precipitation phase methods across a climatic gradient journal January 2019
Warming and provenance limit tree recruitment across and beyond the elevation range of subalpine forest journal December 2016
Controlled infrared heating of an artic meadow: challenge in the vegetation establishment stage journal January 2019
Combining Ground‐Penetrating Radar With Terrestrial LiDAR Scanning to Estimate the Spatial Distribution of Liquid Water Content in Seasonal Snowpacks journal December 2018
Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest journal October 2018
Observations and simulations of the seasonal evolution of snowpack cold content and its relation to snowmelt and the snowpack energy budget posted_content December 2017
Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers journal November 2017

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