skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland: Modeling C Gas Fluxes in Peatland

Abstract

Northern peatlands have accumulated a large amount of organic carbon (C) in their thick peat profile. Climate change and associated variations in soil environments are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is still highly uncertain. Verifying and understanding the influences of changes in environmental factors on C gas fluxes in biogeochemical models are essential for forecasting feedbacks between C gas fluxes and climate change. In this study, we applied a biogeochemical model, DeNitrification-DeComposition (DNDC), to assess impacts of air temperature (TA) and water table (WT) on C gas fluxes in an Alaskan peatland. DNDC was validated against field measurements of net ecosystem exchange of CO2 (NEE) and CH4 fluxes under manipulated surface soil temperature and WT conditions in a moderate rich fen. The validation demonstrates that DNDC was able to capture the observed impacts of the manipulations in soil environments on C gas fluxes. To investigate responses of C gas fluxes to changes in TA and soil water condition, we conducted a series of simulations with varying TA and WT. The results demonstrate that (1) uptake rates of CO2 at the site were reduced by either too colder or warmer temperaturesmore » and generally increased with increasing soil moisture; (2) CH4 emissions showed an increasing trend as TA increased or WT rose toward the peat surface; and (3) the site could shift from a net greenhouse gas (GHG) sink into a net GHG source under some warm and/or dry conditions. A sensitivity analysis evaluated the relative importance of TA and WT to C gas fluxes. The results indicate that both TA and WT played important roles in regulating NEE and CH4 emissions and that within the investigated ranges of the variations in TA and WT, changes in WT showed a greater impact than changes in TA on NEE, CH4 fluxes, and net C gas fluxes at the study fen.« less

Authors:
 [1];  [1];  [1]
  1. Univ. of New Hampshire, Durham, NH (United States). Earth Systems Research Center, Inst. for the Study of Earth, Oceans and Space
Publication Date:
Research Org.:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
OSTI Identifier:
1602269
Grant/Contract Number:  
SC0004632
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Biogeosciences
Additional Journal Information:
Journal Volume: 120; Journal Issue: 7; Journal ID: ISSN 2169-8953
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Deng, Jia, Li, Changsheng, and Frolking, Steve. Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland: Modeling C Gas Fluxes in Peatland. United States: N. p., 2015. Web. doi:10.1002/2014JG002880.
Deng, Jia, Li, Changsheng, & Frolking, Steve. Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland: Modeling C Gas Fluxes in Peatland. United States. doi:10.1002/2014JG002880.
Deng, Jia, Li, Changsheng, and Frolking, Steve. Wed . "Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland: Modeling C Gas Fluxes in Peatland". United States. doi:10.1002/2014JG002880. https://www.osti.gov/servlets/purl/1602269.
@article{osti_1602269,
title = {Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland: Modeling C Gas Fluxes in Peatland},
author = {Deng, Jia and Li, Changsheng and Frolking, Steve},
abstractNote = {Northern peatlands have accumulated a large amount of organic carbon (C) in their thick peat profile. Climate change and associated variations in soil environments are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is still highly uncertain. Verifying and understanding the influences of changes in environmental factors on C gas fluxes in biogeochemical models are essential for forecasting feedbacks between C gas fluxes and climate change. In this study, we applied a biogeochemical model, DeNitrification-DeComposition (DNDC), to assess impacts of air temperature (TA) and water table (WT) on C gas fluxes in an Alaskan peatland. DNDC was validated against field measurements of net ecosystem exchange of CO2 (NEE) and CH4 fluxes under manipulated surface soil temperature and WT conditions in a moderate rich fen. The validation demonstrates that DNDC was able to capture the observed impacts of the manipulations in soil environments on C gas fluxes. To investigate responses of C gas fluxes to changes in TA and soil water condition, we conducted a series of simulations with varying TA and WT. The results demonstrate that (1) uptake rates of CO2 at the site were reduced by either too colder or warmer temperatures and generally increased with increasing soil moisture; (2) CH4 emissions showed an increasing trend as TA increased or WT rose toward the peat surface; and (3) the site could shift from a net greenhouse gas (GHG) sink into a net GHG source under some warm and/or dry conditions. A sensitivity analysis evaluated the relative importance of TA and WT to C gas fluxes. The results indicate that both TA and WT played important roles in regulating NEE and CH4 emissions and that within the investigated ranges of the variations in TA and WT, changes in WT showed a greater impact than changes in TA on NEE, CH4 fluxes, and net C gas fluxes at the study fen.},
doi = {10.1002/2014JG002880},
journal = {Journal of Geophysical Research. Biogeosciences},
number = 7,
volume = 120,
place = {United States},
year = {2015},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Investigating soil moisture–climate interactions in a changing climate: A review
journal, May 2010


The evidence for shrub expansion in Northern Alaska and the Pan-Arctic
journal, April 2006


Recent advances in permafrost modelling
journal, January 2008

  • Riseborough, Daniel; Shiklomanov, Nikolay; Etzelmüller, Bernd
  • Permafrost and Periglacial Processes, Vol. 19, Issue 2
  • DOI: 10.1002/ppp.615

Vulnerability of Permafrost Carbon to Climate Change: Implications for the Global Carbon Cycle
journal, September 2008

  • Schuur, Edward A. G.; Bockheim, James; Canadell, Josep G.
  • BioScience, Vol. 58, Issue 8
  • DOI: 10.1641/B580807

Temperature and soil organic matter decomposition rates - synthesis of current knowledge and a way forward
journal, August 2011


High risk of permafrost thaw
journal, November 2011

  • Schuur, Edward A. G.; Abbott, Benjamin
  • Nature, Vol. 480, Issue 7375
  • DOI: 10.1038/480032a

The response of soil organic carbon of a rich fen peatland in interior Alaska to projected climate change
journal, November 2012

  • Fan, Zhaosheng; David McGuire, Anthony; Turetsky, Merritt R.
  • Global Change Biology, Vol. 19, Issue 2
  • DOI: 10.1111/gcb.12041

Controls on ecosystem and root respiration across a permafrost and wetland gradient in interior Alaska
journal, December 2013

  • McConnell, Nicole A.; Turetsky, Merritt R.; David McGuire, A.
  • Environmental Research Letters, Vol. 8, Issue 4
  • DOI: 10.1088/1748-9326/8/4/045029

Estimating the near-surface permafrost-carbon feedback on global warming
journal, January 2012

  • Schneider von Deimling, T.; Meinshausen, M.; Levermann, A.
  • Biogeosciences, Vol. 9, Issue 2
  • DOI: 10.5194/bg-9-649-2012

A process-oriented model of N 2 O and NO emissions from forest soils: 2. Sensitivity analysis and validation
journal, February 2000

  • Stange, Florian; Butterbach-Bahl, Klaus; Papen, Hans
  • Journal of Geophysical Research: Atmospheres, Vol. 105, Issue D4
  • DOI: 10.1029/1999JD900948

Effects of Experimental Water Table and Temperature Manipulations on Ecosystem CO2 Fluxes in an Alaskan Rich Fen
journal, October 2009


Latin hypercube sampling and the propagation of uncertainty in analyses of complex systems
journal, July 2003


A process-oriented model of N 2 O and NO emissions from forest soils: 1. Model development
journal, February 2000

  • Li, Changsheng; Aber, John; Stange, Florian
  • Journal of Geophysical Research: Atmospheres, Vol. 105, Issue D4
  • DOI: 10.1029/1999JD900949

Peatlands and the carbon cycle: from local processes to global implications – a synthesis
journal, January 2008


Effects on the Structure of Arctic Ecosystems in the Short- and Long-term Perspectives
journal, November 2004

  • Callaghan, Terry V.; Björn, Lars Olof; Chernov, Yuri
  • AMBIO: A Journal of the Human Environment, Vol. 33, Issue 7
  • DOI: 10.1579/0044-7447-33.7.436

Response of anaerobic carbon cycling to water table manipulation in an Alaskan rich fen
journal, March 2013


CO2 exchange in three Canadian High Arctic ecosystems: response to long-term experimental warming
journal, December 2004


Accelerated thawing of subarctic peatland permafrost over the last 50 years
journal, January 2004


Characteristics of the recent warming of permafrost in Alaska
journal, January 2007


Environmental and physical controls on northern terrestrial methane emissions across permafrost zones
journal, November 2012

  • Olefeldt, David; Turetsky, Merritt R.; Crill, Patrick M.
  • Global Change Biology, Vol. 19, Issue 2
  • DOI: 10.1111/gcb.12071

Expert assessment of vulnerability of permafrost carbon to climate change
journal, March 2013


Short-term response of methane fluxes and methanogen activity to water table and soil warming manipulations in an Alaskan peatland
journal, January 2008

  • Turetsky, M. R.; Treat, C. C.; Waldrop, M. P.
  • Journal of Geophysical Research, Vol. 113
  • DOI: 10.1029/2007JG000496

Global peatland dynamics since the Last Glacial Maximum: GLOBAL PEATLANDS SINCE THE LGM
journal, July 2010

  • Yu, Zicheng; Loisel, Julie; Brosseau, Daniel P.
  • Geophysical Research Letters, Vol. 37, Issue 13
  • DOI: 10.1029/2010GL043584

The effect of climate change on carbon in Canadian peatlands
journal, October 2006


An integrated model of soil, hydrology, and vegetation for carbon dynamics in wetland ecosystems: SOIL, HYDROLOGY, VEGETATION INTEGRATED MODEL
journal, October 2002

  • Zhang, Yu; Li, Changsheng; Trettin, Carl C.
  • Global Biogeochemical Cycles, Vol. 16, Issue 4
  • DOI: 10.1029/2001GB001838

Variability in exchange of CO2 across 12 northern peatland and tundra sites: EXCHANGE OF CO2 IN WETLANDS
journal, December 2009


Peatland hydrology and carbon release: why small-scale process matters
journal, October 2005

  • Holden, Joseph
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 363, Issue 1837
  • DOI: 10.1098/rsta.2005.1671

A process‐based model for quantifying the impact of climate change on permafrost thermal regimes
journal, November 2003

  • Zhang, Yu; Chen, Wenjun; Cihlar, Josef
  • Journal of Geophysical Research: Atmospheres, Vol. 108, Issue D22
  • DOI: 10.1029/2002JD003354

Systematic biases in large-scale estimates of wetland methane emissions arising from water table formulations: SYSTEMATIC BIASES IN METHANE EMISSIONS
journal, November 2010

  • Bohn, Theodore J.; Lettenmaier, Dennis P.
  • Geophysical Research Letters, Vol. 37, Issue 22
  • DOI: 10.1029/2010GL045450

Short-term variation in fluxes of carbon dioxide, nitrous oxide and methane in cultivated and forested organic boreal soils
journal, May 2002


TUNDRA CO 2 FLUXES IN RESPONSE TO EXPERIMENTAL WARMING ACROSS LATITUDINAL AND MOISTURE GRADIENTS
journal, May 2007

  • Oberbauer, Steven F.; Tweedie, Craig E.; Welker, Jeff M.
  • Ecological Monographs, Vol. 77, Issue 2
  • DOI: 10.1890/06-0649

Manure-DNDC: a biogeochemical process model for quantifying greenhouse gas and ammonia emissions from livestock manure systems
journal, May 2012

  • Li, Changsheng; Salas, William; Zhang, Ruihong
  • Nutrient Cycling in Agroecosystems, Vol. 93, Issue 2
  • DOI: 10.1007/s10705-012-9507-z

CO 2 and CH 4 exchanges between land ecosystems and the atmosphere in northern high latitudes over the 21st century
journal, January 2006

  • Zhuang, Qianlai; Melillo, Jerry M.; Sarofim, Marcus C.
  • Geophysical Research Letters, Vol. 33, Issue 17
  • DOI: 10.1029/2006GL026972

Sensitivity of the carbon cycle in the Arctic to climate change
journal, November 2009

  • McGuire, A. David; Anderson, Leif G.; Christensen, Torben R.
  • Ecological Monographs, Vol. 79, Issue 4
  • DOI: 10.1890/08-2025.1

Climate-soil processes in the presence of permafrost: a systems modelling approach
journal, October 1993


A comparison of methane flux in a boreal landscape between a dry and a wet year: METHANE FLUX IN A BOREAL LANDSCAPE
journal, March 2005

  • Bubier, Jill; Moore, Tim; Savage, Kathleen
  • Global Biogeochemical Cycles, Vol. 19, Issue 1
  • DOI: 10.1029/2004GB002351

Climate–Carbon Cycle Feedback Analysis: Results from the C 4 MIP Model Intercomparison
journal, July 2006

  • Friedlingstein, P.; Cox, P.; Betts, R.
  • Journal of Climate, Vol. 19, Issue 14
  • DOI: 10.1175/JCLI3800.1

Circumpolar assessment of permafrost C quality and its vulnerability over time using long-term incubation data
journal, October 2013

  • Schädel, Christina; Schuur, Edward A. G.; Bracho, Rosvel
  • Global Change Biology, Vol. 20, Issue 2
  • DOI: 10.1111/gcb.12417

Permafrost carbon-climate feedbacks accelerate global warming
journal, August 2011

  • Koven, C. D.; Ringeval, B.; Friedlingstein, P.
  • Proceedings of the National Academy of Sciences, Vol. 108, Issue 36
  • DOI: 10.1073/pnas.1103910108

Thawing permafrost and thicker active layers in sub-arctic Sweden
journal, July 2008

  • Åkerman, H. Jonas; Johansson, Margareta
  • Permafrost and Periglacial Processes, Vol. 19, Issue 3
  • DOI: 10.1002/ppp.626

Diurnal and seasonal variation in methane emissions in a northern Canadian peatland measured by eddy covariance
journal, October 2009


Annual carbon gas budget for a subarctic peatland, Northern Sweden
journal, January 2010

  • Bäckstrand, K.; Crill, P. M.; Jackowicz-Korczyñski, M.
  • Biogeosciences, Vol. 7, Issue 1
  • DOI: 10.5194/bg-7-95-2010

Evidence and Implications of Recent Climate Change in Northern Alaska and Other Arctic Regions
journal, October 2005


A model of nitrous oxide evolution from soil driven by rainfall events: 1. Model structure and sensitivity
journal, June 1992

  • Li, Changsheng; Frolking, Steve; Frolking, Tod A.
  • Journal of Geophysical Research: Atmospheres, Vol. 97, Issue D9
  • DOI: 10.1029/92JD00509

Quantifying greenhouse gas emissions from soils: Scientific basis and modeling approach
journal, August 2007


RESPONSE OF CO 2 AND CH 4 EMISSIONS FROM PEATLANDS TO WARMING AND WATER TABLE MANIPULATION
journal, April 2001


A Quantitative Model-Independent Method for Global Sensitivity Analysis of Model Output
journal, February 1999


Upscaling methane fluxes from closed chambers to eddy covariance based on a permafrost biogeochemistry integrated model
journal, December 2011


Seasonal ice and hydrologic controls on dissolved organic carbon and nitrogen concentrations in a boreal-rich fen
journal, January 2010

  • Kane, Evan S.; Turetsky, Merritt R.; Harden, Jennifer W.
  • Journal of Geophysical Research, Vol. 115, Issue G4
  • DOI: 10.1029/2010JG001366

Carbon respiration from subsurface peat accelerated by climate warming in the subarctic
journal, July 2009

  • Dorrepaal, Ellen; Toet, Sylvia; van Logtestijn, Richard S. P.
  • Nature, Vol. 460, Issue 7255
  • DOI: 10.1038/nature08216

Soil organic carbon pools in the northern circumpolar permafrost region: SOIL ORGANIC CARBON POOLS
journal, June 2009

  • Tarnocai, C.; Canadell, J. G.; Schuur, E. A. G.
  • Global Biogeochemical Cycles, Vol. 23, Issue 2
  • DOI: 10.1029/2008GB003327