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Title: Intermediate time scale response of atmospheric CO 2 following prescribed fire in a longleaf pine forest

Abstract

Fire plays an essential role in maintaining the structure and function of longleaf pine ecosystems. While the effects of fire on carbon cycle have been measured in previous studies for short periods during a burn and for multiyear periods following the burn, information on how carbon cycle is influenced by such changes over the span of a few weeks to months has yet to be quantified. We have analyzed high-frequency measurements of CO 2 concentration and flux, as well as associated micrometeorological variables, at three levels of the tall Aiken AmeriFlux tower during and after a prescribed burn. Measurements of the CO 2 concentration and vertical fluxes were examined as well as calculated net ecosystem exchange (NEE) for periods prior to and after the burn. Large spikes in both CO 2 concentration and CO 2 flux during the fire and increases in atmospheric CO 2 concentration and reduced CO 2 flux were observed for several weeks following the burn, particularly below the forest canopy. Both CO 2 measurements and NEE were found to return to their preburn states within 60–90 days following the burn when no statistical significance was found between preburn and postburn NEE. Furthermore, this study examines themore » micrometeorological conditions during a low-intensity prescribed burn and its short-term effects on local CO 2 dynamics in a forested environment by identifying observable impacts on local measurements of atmospheric CO 2 concentration and fluxes.« less

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5];  [3];  [3]
  1. Savannah River National Lab., Aiken, SC (United States)
  2. United States Forest Service-Savannah River, New Ellenton, SC (United States)
  3. Univ. of Georgia, Griffin, GA (United States)
  4. Univ. of Alabama, Tuscaloosa, AL (United States)
  5. Savannah River National Lab., Aiken, SC (United States); Univ. of Georgia, Athens, GA (United States)
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1368681
Alternate Identifier(s):
OSTI ID: 1402139
Report Number(s):
SRNS-STI-2016-00614
Journal ID: ISSN 2169-8953
Grant/Contract Number:  
AC09-08SR22470
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Biogeosciences
Additional Journal Information:
Journal Volume: 121; Journal Issue: 10; Journal ID: ISSN 2169-8953
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; prescribed fire; carbon cycle; AmeriFlux

Citation Formats

Viner, Brian, Parker, M., Maze, G., Varnedoe, P., Leclerc, M., Starr, G., Aubrey, D., Zhang, G., and Duarte, H.. Intermediate time scale response of atmospheric CO2 following prescribed fire in a longleaf pine forest. United States: N. p., 2016. Web. doi:10.1002/2016JG003351.
Viner, Brian, Parker, M., Maze, G., Varnedoe, P., Leclerc, M., Starr, G., Aubrey, D., Zhang, G., & Duarte, H.. Intermediate time scale response of atmospheric CO2 following prescribed fire in a longleaf pine forest. United States. doi:10.1002/2016JG003351.
Viner, Brian, Parker, M., Maze, G., Varnedoe, P., Leclerc, M., Starr, G., Aubrey, D., Zhang, G., and Duarte, H.. Wed . "Intermediate time scale response of atmospheric CO2 following prescribed fire in a longleaf pine forest". United States. doi:10.1002/2016JG003351. https://www.osti.gov/servlets/purl/1368681.
@article{osti_1368681,
title = {Intermediate time scale response of atmospheric CO2 following prescribed fire in a longleaf pine forest},
author = {Viner, Brian and Parker, M. and Maze, G. and Varnedoe, P. and Leclerc, M. and Starr, G. and Aubrey, D. and Zhang, G. and Duarte, H.},
abstractNote = {Fire plays an essential role in maintaining the structure and function of longleaf pine ecosystems. While the effects of fire on carbon cycle have been measured in previous studies for short periods during a burn and for multiyear periods following the burn, information on how carbon cycle is influenced by such changes over the span of a few weeks to months has yet to be quantified. We have analyzed high-frequency measurements of CO2 concentration and flux, as well as associated micrometeorological variables, at three levels of the tall Aiken AmeriFlux tower during and after a prescribed burn. Measurements of the CO2 concentration and vertical fluxes were examined as well as calculated net ecosystem exchange (NEE) for periods prior to and after the burn. Large spikes in both CO2 concentration and CO2 flux during the fire and increases in atmospheric CO2 concentration and reduced CO2 flux were observed for several weeks following the burn, particularly below the forest canopy. Both CO2 measurements and NEE were found to return to their preburn states within 60–90 days following the burn when no statistical significance was found between preburn and postburn NEE. Furthermore, this study examines the micrometeorological conditions during a low-intensity prescribed burn and its short-term effects on local CO2 dynamics in a forested environment by identifying observable impacts on local measurements of atmospheric CO2 concentration and fluxes.},
doi = {10.1002/2016JG003351},
journal = {Journal of Geophysical Research. Biogeosciences},
number = 10,
volume = 121,
place = {United States},
year = {Wed Oct 12 00:00:00 EDT 2016},
month = {Wed Oct 12 00:00:00 EDT 2016}
}

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Works referenced in this record:

Correction of flux measurements for density effects due to heat and water vapour transfer
journal, January 1980

  • Webb, E. K.; Pearman, G. I.; Leuning, R.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 106, Issue 447, p. 85-100
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