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Title: Greenhouse gas balance over thaw-freeze cycles in discontinuous zone permafrost

Journal Article · · Journal of Geophysical Research. Biogeosciences
DOI:https://doi.org/10.1002/2016JG003600· OSTI ID:1466676
ORCiD logo [1];  [2];  [3];  [4];  [3];  [5];  [1]; ORCiD logo [1]
  1. Florida State Univ., Tallahassee, FL (United States). Earth Ocean and Atmospheric Sciences
  2. Gulf Coast State College, Panama City, FL (United States). Natural Sciences
  3. Christopher Newport Univ., Newport News, VA (United States). Organismal and Environmental Biology
  4. Univ. of New Hampshire, Durham, NH (United States). Earth Systems Research Center
  5. Univ. of Alabama, Tuscaloosa, AL (United States). Geological Sciences

Abstract Peat in the discontinuous permafrost zone contains a globally significant reservoir of carbon that has undergone multiple permafrost‐thaw cycles since the end of the mid‐Holocene (~3700 years before present). Periods of thaw increase C decomposition rates which leads to the release of CO 2 and CH 4 to the atmosphere creating potential climate feedback. To determine the magnitude and direction of such feedback, we measured CO 2 and CH 4 emissions and modeled C accumulation rates and radiative fluxes from measurements of two radioactive tracers with differing lifetimes to describe the C balance of the peatland over multiple permafrost‐thaw cycles since the initiation of permafrost at the site. At thaw features, the balance between increased primary production and higher CH 4 emission stimulated by warmer temperatures and wetter conditions favors C sequestration and enhanced peat accumulation. Flux measurements suggest that frozen plateaus may intermittently (order of years to decades) act as CO 2 sources depending on temperature and net ecosystem respiration rates, but modeling results suggest that—despite brief periods of net C loss to the atmosphere at the initiation of thaw—integrated over millennia, these sites have acted as net C sinks via peat accumulation. In greenhouse gas terms, the transition from frozen permafrost to thawed wetland is accompanied by increasing CO 2 uptake that is partially offset by increasing CH 4 emissions. In the short‐term (decadal time scale) the net effect of this transition is likely enhanced warming via increased radiative C emissions, while in the long‐term (centuries) net C deposition provides a negative feedback to climate warming.

Research Organization:
Florida State Univ., Tallahassee, FL (United States); Christopher Newport Univ., Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0004632; SC0010580; SC0012088; SC0016440
OSTI ID:
1466676
Alternate ID(s):
OSTI ID: 1402166
Journal Information:
Journal of Geophysical Research. Biogeosciences, Vol. 122, Issue 2; ISSN 2169-8953
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

References (64)

Dissolved organic matter in small streams along a gradient from discontinuous to continuous permafrost journal September 2004
Organic matter accumulation, peat chemistry, and permafrost melting in peatlands of boreal Alberta journal January 2000
Vulnerability of Permafrost Carbon to Climate Change: Implications for the Global Carbon Cycle journal September 2008
Radiocarbon evidence for the importance of surface vegetation on fermentation and methanogenesis in contrasting types of boreal peatlands: IMPORTANCE OF SURFACE VEGETATION journal December 2008
Disequilibrium response of permafrost in boreal continental western Canada to climate change journal May 1995
Climate change and the permafrost carbon feedback journal April 2015
Detecting the signature of permafrost thaw in Arctic rivers: SIGNATURE OF PERMAFROST THAW IN RIVERS journal April 2015
A 2200-Year Record of Permafrost Dynamics and Carbon Cycling in a Collapse-Scar Bog, Interior Alaska journal September 2012
Permafrost carbon: Stock and decomposability of a globally significant carbon pool journal January 2006
Methane flux from Peltandra virginica: stable isotope tracing and chamber effects journal March 1992
Surface production fuels deep heterotrophic respiration in northern peatlands: HETEROTROPHIC RESPIRATION IN PEATLANDS journal December 2013
Variation in methane production pathways associated with permafrost decomposition in collapse scar bogs of Alberta, Canada: VARIATION IN METHANE PRODUCTION journal October 2007
Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands journal October 2016
Soil incubations reproduce field methane dynamics in a subarctic wetland journal October 2015
Forward to the lead-210 dating anniversary series journal January 1993
Holocene Carbon Stocks and Carbon Accumulation Rates Altered in Soils Undergoing Permafrost Thaw journal November 2011
The Effects of Permafrost Thaw on Soil Hydrologic, Thermal, and Carbon Dynamics in an Alaskan Peatland journal November 2011
The assessment of 210Pb data from sites with varying sediment accumulation rates journal July 1983
Winter precipitation and snow accumulation drive the methane sink or source strength of Arctic tussock tundra journal May 2016
How northern peatlands influence the Earth's radiative budget: Sustained methane emission versus sustained carbon sequestration journal January 2006
The response of heterotrophic CO2 flux to soil warming journal January 2005
Localized Permafrost Peatlands in Western Canada: Definition, Distributions, and Degradation journal February 2001
Exploring the relationship between peatland net carbon balance and apparent carbon accumulation rate at century to millennial time scales journal June 2014
Effect of permafrost thaw on CO 2 and CH 4 exchange in a western Alaska peatland chronosequence journal August 2014
Moving Beyond Global Warming Potentials to Quantify the Climatic Role of Ecosystems journal May 2015
Permafrost thaw and soil moisture driving CO 2 and CH 4 release from upland tundra journal March 2015
Potential Carbon Losses From Peat Profiles: Effects of Temperature, Drought Cycles, and Fire journal August 1992
Spatial and temporal trends in carbon storage of peatlands of continental western Canada through the Holocene journal May 2000
The effect of fire and permafrost interactions on soil carbon accumulation in an upland black spruce ecosystem of interior Alaska: implications for post-thaw carbon loss: PERMAFROST AND FIRE CONTROLS ON SOIL CARBON journal December 2010
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake journal January 1992
The disappearance of relict permafrost in boreal north America: Effects on peatland carbon storage and fluxes journal September 2007
Impacts of permafrost degradation on arctic river biogeochemistry journal January 2009
The changing landscape of Canada's western boreal forest: the current dynamics of permafrost journal February 2000
Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils journal June 2016
Long-term CO2 production following permafrost thaw journal July 2013
Recent change of Arctic tundra ecosystems from a net carbon dioxide sink to a source journal February 1993
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps journal January 2014
Physiological responses of a black spruce forest to weather journal December 1997
Wetland succession in a permafrost collapse: interactions between fire and thermokarst journal January 2007
Dating recent peat deposits journal June 2004
Climate Change Disequilibrium of Boreal Permafrost Peatlands Caused by Local Processes journal March 1998
Differential response of carbon fluxes to climate in three peatland ecosystems that vary in the presence and stability of permafrost: Carbon fluxes and permafrost thaw journal August 2014
Organic matter transformation in the peat column at Marcell Experimental Forest: Humification and vertical stratification: Organic matter dynamics journal April 2014
Global change belowground: impacts of elevated CO2, nitrogen, and summer drought on soil food webs and biodiversity journal October 2011
The Influence of Permafrost and Fire upon Carbon Accumulation in High Boreal Peatlands, Northwest Territories, Canada journal May 2000
Investigating dissolved organic matter decomposition in northern peatlands using complimentary analytical techniques journal July 2013
Soil Warming and Carbon-Cycle Feedbacks to the Climate System journal December 2002
Temperature and peat type control CO 2 and CH 4 production in Alaskan permafrost peats journal April 2014
Patterns of Bryophyte Diversity in Peatlands of Continental Western Canada journal July 1995
Annual carbon gas budget for a subarctic peatland, Northern Sweden journal January 2010
Cyclic Development of Permafrost in the Peatlands of Northwestern Alberta, Canada journal August 1993
The calculation of lead-210 dates assuming a constant rate of supply of unsupported 210Pb to the sediment journal April 1978
Thawing permafrost increases old soil and autotrophic respiration in tundra: Partitioning ecosystem respiration using δ 13 C and ∆ 14 C journal November 2012
Sediment Accumulation Rates and the Completeness of Stratigraphic Sections journal September 1981
Controls on CH 4 emissions from a northern peatland journal March 1999
Increased plant productivity in Alaskan tundra as a result of experimental warming of soil and permafrost: Increased plant productivity in Alaskan tundra journal November 2011
Current disturbance and the diminishing peatland carbon sink journal January 2002
Carbon dioxide and climate impulse response functions for the computation of greenhouse gas metrics: a multi-model analysis journal January 2013
Effects of fires on carbon cycling in North American boreal peatlands journal March 1998
Soil organic carbon pools in the northern circumpolar permafrost region: SOIL ORGANIC CARBON POOLS journal June 2009
Localized Permafrost Peatlands in Western Canada: Definition, Distributions, and Degradation journal February 2001
Patterns of boreal permafrost peatland vegetation across environmental gradients sensitive to climate warming journal October 1999
The Influence of Permafrost and Fire upon Carbon Accumulation in High Boreal Peatlands, Northwest Territories, Canada journal May 2000
Greenhouse carbon balance of wetlands: methane emission versus carbon sequestration: Greenhouse carbon balance of wetlands journal November 2001

Cited By (4)

Respiration of aged soil carbon during fall in permafrost peatlands enhanced by active layer deepening following wildfire but limited following thermokarst journal August 2018
Tropical peatland carbon storage linked to global latitudinal trends in peat recalcitrance journal September 2018
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw journal February 2019
Tropical peatland carbon storage linked to global latitudinal trends in peat recalcitrance text January 2021