Pulse emissions of carbon dioxide during snowmelt at a high-elevation site in northern Arizona, U.S.A.

Benjamin Sullivan, Sabina Dore, Mario Montes-Helu, Thomas E Kolb, Stephen Hart

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The paradigm that winter is a dormant period of soil biogeochemical activity in high elevation or high latitude ecosystems has been amply refuted by recent research. Carbon dioxide (CO2) released from cold or snow-covered soil is a substantial component of total annual ecosystem carbon fluxes. Recent investigations have shown that the late-winter/early-spring transition is a period of high biogeochemical activity. However, little is known about the temporal dynamics of CO2 from the snowpack itself during periods of snowmelt. We present a case study of three snowmelt events at a high-elevation site in northern Arizona during which we measured changes in CO2 concentrations and fluxes above the snow and within the soil profile, and characterized the soil physical environment and site meteorological variables. We show that large pulses of CO2 were emitted to the atmosphere during snowmelt, and we present evidence that these pulses came from CO2 stored in snowpack. Earlier and more frequent snowmelts worldwide caused by climate change have the potential to alter the timing of release of CO2 from land to atmosphere.

Original languageEnglish (US)
Pages (from-to)247-254
Number of pages8
JournalArctic, Antarctic, and Alpine Research
Volume44
Issue number2
DOIs
StatePublished - May 1 2012

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snowmelt
carbon dioxide
snowpack
snow
soil
atmosphere
ecosystem
winter
carbon flux
soil profile
ecosystems
climate change
soil profiles
case studies
carbon

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Global and Planetary Change
  • Earth-Surface Processes

Cite this

Pulse emissions of carbon dioxide during snowmelt at a high-elevation site in northern Arizona, U.S.A. / Sullivan, Benjamin; Dore, Sabina; Montes-Helu, Mario; Kolb, Thomas E; Hart, Stephen.

In: Arctic, Antarctic, and Alpine Research, Vol. 44, No. 2, 01.05.2012, p. 247-254.

Research output: Contribution to journalArticle

Sullivan, Benjamin ; Dore, Sabina ; Montes-Helu, Mario ; Kolb, Thomas E ; Hart, Stephen. / Pulse emissions of carbon dioxide during snowmelt at a high-elevation site in northern Arizona, U.S.A. In: Arctic, Antarctic, and Alpine Research. 2012 ; Vol. 44, No. 2. pp. 247-254.
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