Rapid CO2 Release From Eroding Permafrost in Seawater

被引:58
作者
Tanski, G. [1 ,2 ]
Wagner, D. [3 ,4 ]
Knoblauch, C. [5 ,6 ]
Fritz, M. [2 ]
Sachs, T. [3 ]
Lantuit, H. [2 ,4 ]
机构
[1] Vrije Univ Amsterdam, Fac Sci Earth & Climate, Amsterdam, Netherlands
[2] Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Permafrost Res Unit, Potsdam, Germany
[3] GFZ German Res Ctr Geosci, Potsdam, Germany
[4] Potsdam Univ, Inst Geosci, Potsdam, Germany
[5] Univ Hamburg, Inst Soil Sci, Hamburg, Germany
[6] Univ Hamburg, Ctr Earth Syst Res & Sustainabil, Hamburg, Germany
关键词
TERRESTRIAL ORGANIC-MATTER; RETROGRESSIVE THAW SLUMPS; BUOR-KHAYA BAY; BEAUFORT SEA; CARBON RELEASE; CLIMATE-CHANGE; YUKON COAST; GROUND ICE; DEGRADATION; VULNERABILITY;
D O I
10.1029/2019GL084303
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Permafrost is thawing extensively due to climate warming. When permafrost thaws, previously frozen organic carbon (OC) is converted into carbon dioxide (CO2) or methane, leading to further warming. This process is included in models as gradual deepening of the seasonal non-frozen layer. Yet, models neglect abrupt OC mobilization along rapidly eroding Arctic coastlines. We mimicked erosion in an experiment by incubating permafrost with seawater for an average Arctic open-water season. We found that CO2 production from permafrost OC is as efficient in seawater as without. For each gram (dry weight) of eroding permafrost, up to 4.3 +/- 1.0 mg CO2 will be released and 6.2 +/- 1.2% of initial OC mineralized at 4 degrees C. Our results indicate that potentially large amounts of CO2 are produced along eroding permafrost coastlines, onshore and within nearshore waters. We conclude that coastal erosion could play an important role in carbon cycling and the climate system.
引用
收藏
页码:11244 / 11252
页数:9
相关论文
共 69 条
  • [1] Patterns and persistence of hydrologic carbon and nutrient export from collapsing upland permafrost
    Abbott, B. W.
    Jones, J. B.
    Godsey, S. E.
    Larouche, J. R.
    Bowden, W. B.
    [J]. BIOGEOSCIENCES, 2015, 12 (12) : 3725 - 3740
  • [2] Elevated dissolved organic carbon biodegradability from thawing and collapsing permafrost
    Abbott, Benjamin W.
    Larouche, Julia R.
    Jones, Jeremy B., Jr.
    Bowden, William B.
    Balser, Andrew W.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2014, 119 (10) : 2049 - 2063
  • [3] Nonconservative behavior of dissolved organic carbon across the Laptev and East Siberian seas
    Alling, Vanja
    Sanchez-Garcia, Laura
    Porcelli, Don
    Pugach, Sveta
    Vonk, Jorien E.
    van Dongen, Bart
    Morth, Carl-Magnus
    Anderson, Leif G.
    Sokolov, Alexander
    Andersson, Per
    Humborg, Christoph
    Semiletov, Igor
    Gustafsson, Orjan
    [J]. GLOBAL BIOGEOCHEMICAL CYCLES, 2010, 24
  • [4] Recent Arctic Ocean sea ice loss triggers novel fall phytoplankton blooms
    Ardyna, Mathieu
    Babin, Marcel
    Gosselin, Michel
    Devred, Emmanuel
    Rainville, Luc
    Tremblay, Jean-Eric
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2014, 41 (17) : 6207 - 6212
  • [5] Are F.E., 1988, Polar Geogr. Geol, V12, P1, DOI DOI 10.1080/10889378809377343
  • [6] Quantifying the degradation of organic matter in marine sediments: A review and synthesis
    Arndt, Sandra
    Jorgensen, B. B.
    LaRowe, D. E.
    Middelburg, J. J.
    Pancost, R. D.
    Regnier, P.
    [J]. EARTH-SCIENCE REVIEWS, 2013, 123 : 53 - 86
  • [7] Modeling erosion of ice-rich permafrost bluffs along the Alaskan Beaufort Sea coast
    Barnhart, Katherine R.
    Anderson, Robert S.
    Overeem, Irina
    Wobus, Cameron
    Clow, Gary D.
    Urban, Frank E.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2014, 119 (05) : 1155 - 1179
  • [8] The Arctic Ocean marine carbon cycle: evaluation of air-sea CO2 exchanges, ocean acidification impacts and potential feedbacks
    Bates, N. R.
    Mathis, J. T.
    [J]. BIOGEOSCIENCES, 2009, 6 (11) : 2433 - 2459
  • [9] Battin TJ, 2008, NAT GEOSCI, V1, P95, DOI 10.1038/ngeo101
  • [10] Bounding cross-shelf transport time and degradation in Siberian-Arctic land-ocean carbon transfer
    Broder, Lisa
    Tesi, Tommaso
    Andersson, August
    Semiletov, Igor
    Gustafsson, Orjan
    [J]. NATURE COMMUNICATIONS, 2018, 9