Global pulses of organic carbon burial in deep-sea sediments during glacial maxima

The burial of organic carbon in marine sediments removes carbon dioxide from the ocean–atmosphere pool, provides energy to the deep biosphere, and on geological timescales drives the oxygenation of the atmosphere. Here we quantify natural variations in the burial of organic carbon in deep-sea sediments over the last glacial cycle. Using a new data compilation of hundreds of sediment cores, we show that the accumulation rate of organic carbon in the deep sea was consistently higher (50%) during glacial maxima than during interglacials. The spatial pattern and temporal progression of the changes suggest that enhanced nutrient supply to parts of the surface ocean contributed to the glacial burial pulses, with likely additional contributions from more efficient transfer of organic matter to the deep sea and better preservation of organic matter due to reduced oxygen exposure. These results demonstrate a pronounced climate sensitivity for this global carbon cycle sink.

[1]  David Archer,et al.  Association of sinking organic matter with various types of mineral ballast in the deep sea: Implications for the rain ratio , 2002 .

[2]  J. Fohlmeister,et al.  Strong and deep Atlantic meridional overturning circulation during the last glacial cycle , 2014, Nature.

[3]  Klas Lackschewitz,et al.  Proceedings of the Ocean Drilling Program , 2002 .

[4]  K. Lambeck,et al.  Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records , 2002 .

[5]  D. M. Nelson,et al.  A review of the Si cycle in the modern ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy , 2000 .

[6]  J. Sachs,et al.  A deeper respired carbon pool in the glacial equatorial Pacific Ocean , 2010 .

[7]  M. Lyle.  Climatically forced organic carbon burial in equatorial Atlantic and Pacific Oceans , 1988, Nature.

[8]  E. Galbraith,et al.  The acceleration of oceanic denitrification during deglacial warming , 2013 .

[9]  Paul G. Falkowski,et al.  Evolution of the nitrogen cycle and its influence on the biological sequestration of CO2 in the ocean , 1997, Nature.

[10]  J. Covault,et al.  Submarine fans at all sea-level stands: Tectono-morphologic and climatic controls on terrigenous sediment delivery to the deep sea , 2010 .

[11]  David McGee,et al.  Covariant Glacial-Interglacial Dust Fluxes in the Equatorial Pacific and Antarctica , 2008, Science.

[12]  Corinne Le Quéré,et al.  Role of Marine Biology in Glacial-Interglacial CO2 Cycles , 2005, Science.

[13]  J. Middelburg,et al.  Microbial bioavailability regulates organic matter preservation in marine sediments , 2012 .

[14]  Rina Schumer,et al.  Real and apparent changes in sediment deposition rates through time , 2009 .

[15]  C. Hensen,et al.  Organic carbon content in surface sediments—defining regional provinces , 2004 .

[16]  Michael Sarnthein,et al.  Global variations of surface ocean productivity in low and mid latitudes: Influence on CO2 reservoirs of the deep ocean and atmosphere during the last 21,000 years , 1988 .

[17]  Hilairy E. Hartnett,et al.  Influence of oxygen exposure time on organic carbon preservation in continental margin sediments , 1998, Nature.

[18]  S. Katsev,et al.  When deep diagenesis in Arctic Ocean sediments compromises manganese-based geochronology , 2015 .

[19]  F. Joos,et al.  Simulating atmospheric CO2, 13C and the marine carbon cycle during the Last Glacial–Interglacial cycle: possible role for a deepening of the mean remineralization depth and an increase in the oceanic nutrient inventory , 2012 .

[20]  W. Broecker.  Ocean chemistry during glacial time , 1982 .

[21]  Ian R Hall,et al.  Deep circulation changes in the central South Atlantic during the past 145 kyrs reflected in a combined231Pa/230Th, Neodymium isotope and benthic δ13C record , 2015 .

[22]  A. Schilt,et al.  Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years , 2007, Science.

[23]  Gabriel Reygondeau,et al.  Dynamic biogeochemical provinces in the global ocean , 2013 .

[24]  K. Matsumoto,et al.  Biology‐mediated temperature control on atmospheric pCO2 and ocean biogeochemistry , 2007 .

[25]  A. Longhurst.  Seasonal cycles of pelagic production and consumption , 1995 .

[26]  R. Ganeshram,et al.  Large changes in oceanic nutrient inventories from glacial to interglacial periods , 1995, Nature.

[27]  M. Payne,et al.  The dynamics of the marine nitrogen cycle across the last deglaciation , 2013 .

[28]  E. Galbraith,et al.  Deglacial weakening of the oceanic soft tissue pump: global constraints from sedimentary nitrogen isotopes and oxygenation proxies , 2015 .

[29]  E. Galbraith,et al.  Large climate-driven changes of oceanic oxygen concentrations during the last deglaciation , 2012 .

[30]  F. Sayles,et al.  Benthic remineralization and burial of biogenic SiO2, CaCO3, organic carbon, and detrital material in the Southern Ocean along a transect at 170° West , 2001 .

[31]  NingZENG.  Glacial-Interglacial Atmospheric CO2 Change—The Glacial Burial Hypothesis , 2003 .

[32]  C. Slomp,et al.  Shelf erosion and submarine river canyons: implications for deep-sea oxygenation and ocean productivity during glaciation , 2010 .

[33]  G. Haug,et al.  The polar ocean and glacial cycles in atmospheric CO2 concentration , 2010, Nature.

[34]  T. Pedersen.  Increased productivity in the eastern equatorial Pacific during the last glacial maximum (19,000 to 14,000 yr B.P) , 1983 .

[35]  G. Arrhenius.  Sediment Cores from the East Pacific , 1953 .

[36]  J. Jouzel,et al.  Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica , 1999, Nature.

[37]  R. Jahnke,et al.  The global ocean flux of particulate organic carbon: Areal distribution and magnitude , 1996 .

[38]  Gerald H. Haug,et al.  Isotopic constraints on glacial/interglacial changes in the oceanic nitrogen budget , 2004 .

[39]  K. Arrigo,et al.  Processes and patterns of oceanic nutrient limitation , 2013 .

[40]  D. Burdige,et al.  Burial of terrestrial organic matter in marine sediments: A re‐assessment , 2005 .

[41]  G. Schmiedl,et al.  Glacial–interglacial changes in bottom-water oxygen content on the Portuguese margin , 2015 .

[42]  Gerald H. Haug,et al.  Southern Ocean dust–climate coupling over the past four million years , 2011, Nature.

[43]  John P. Dunne,et al.  A synthesis of global particle export from the surface ocean and cycling through the ocean interior and on the seafloor , 2007 .

[44]  R. Schneider,et al.  Terrestrial organic carbon accumulation on the Amazon deep sea fan during the last glacial sea level low stand , 1999 .

[45]  J. Toggweiler,et al.  Global calcite cycling constrained by sediment preservation controls , 2012 .

[46]  P. Ciais,et al.  Large inert carbon pool in the terrestrial biosphere during the Last Glacial Maximum , 2012 .

[47]  M. Raymo,et al.  A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ18O records , 2005 .