Biogeochemistry of the North Atlantic during oceanic anoxic event 2: role of changes in ocean circulation and phosphorus input

The geological record provides evidence for the periodic occurrence of water column anoxia and formation of organic-rich deposits in the North Atlantic Ocean during the mid-Cretaceous (hereafter called the proto-North Atlantic). Both changes in primary productivity and oceanic circulation likely played a role in the development of the low-oxygen conditions. Several studies suggest that an increased input of phosphorus from land initiated oceanic anoxic events (OAEs). Other proposed mechanisms invoke a vigorous upwelling system and an ocean circulation pattern that acted as a trap for nutrients from the Pacific Ocean. Here, we use a detailed biogeochemical box model for the proto-North Atlantic to analyse under what conditions anoxia could have developed during OAE2 (94 Ma). The model explicitly describes the coupled water, carbon, oxygen and phosphorus cycles for the deep basin and continental shelves. In our simulations, we assume the vigorous water circulation from a recent regional ocean model study. Our model results for pre-OAE2 and OAE2 conditions are compared to sediment records of organic carbon and proxies for photic zone euxinia and bottom water redox conditions (e.g. isorenieratane, carbon/phosphorus ratios). Our results show that a strongly elevated input of phosphorus from rivers and the Pacific Ocean relative to pre-OAE2 conditions is a requirement for the widespread development of low oxygen in the proto-North Atlantic during OAE2. Moreover, anoxia in the proto-North Atlantic is shown to be greatly influenced by the oxygen concentration of Pacific bottom waters. In our model, primary productivity increased significantly upon the transition from pre-OAE2 to OAE2 conditions. Our model captures the regional trends in anoxia as deduced from observations, with euxinia spreading to the northern and eastern shelves but with the most intense euxinia occurring along the southern coast. However, anoxia in the central deep basin is difficult to achieve in the model. This suggests that the ocean circulation used in the model may be too vigorous and/or that anoxia in the proto-North Atlantic was less widespread than previously thought.

[1]  J. Damsté,et al.  A perturbed hydrological cycle during Oceanic Anoxic Event 2 , 2014 .

[2]  R. Pancost,et al.  Nutrients as the dominant control on the spread of anoxia and euxinia across the Cenomanian-Turonian oceanic anoxic event (OAE2): Model-data comparison , 2012 .

[3]  J. Damsté,et al.  Organic matter provenance, palaeoproductivity and bottom water anoxia during the Cenomanian/Turonian oceanic anoxic event in the Newfoundland Basin (northern proto North Atlantic Ocean) , 2012 .

[4]  A. Anbar,et al.  Iron isotope and trace metal records of iron cycling in the proto‐North Atlantic during the Cenomanian‐Turonian oceanic anoxic event (OAE‐2) , 2012 .

[5]  Nicolas Gruber,et al.  A comparative study of biological production in eastern boundary upwelling systems using an artificial neural network , 2011 .

[6]  D. Reed,et al.  A quantitative reconstruction of organic matter and nutrient diagenesis in Mediterranean Sea sediments over the Holocene , 2011 .

[7]  G. Henderson,et al.  Significant increases in global weathering during Oceanic Anoxic Events 1a and 2 indicated by calcium isotopes , 2011 .

[8]  C. März,et al.  Geochemical environment of Cenomanian - Turonian black shale deposition at Wunstorf (northern Germany) , 2011 .

[9]  B. Gustafsson,et al.  Beyond the Fe-P-redox connection: preferential regeneration of phosphorus from organic matter as a key control on Baltic Sea nutrient cycles , 2011 .

[10]  C. Slomp.  Phosphorus Cycling in the Estuarine and Coastal Zones , 2011 .

[11]  C. Slomp.  5.06 – Phosphorus Cycling in the Estuarine and Coastal Zones: Sources, Sinks, and Transformations , 2011 .

[12]  A. Oschlies,et al.  Simulating the biogeochemical effects of volcanic CO2 degassing on the oxygen-state of the deep ocean during the Cenomanian/Turonian Anoxic Event (OAE2) , 2011 .

[13]  H. Dijkstra,et al.  The mid‐Cretaceous North Atlantic nutrient trap: Black shales and OAEs , 2010 .

[14]  P. Meijer,et al.  A regional ocean circulation model for the mid-Cretaceous North Atlantic Basin: implications for black shale formation , 2010 .

[15]  A. Bekker,et al.  The evolution of the marine phosphate reservoir , 2010, Nature.

[16]  C. Slomp,et al.  Sedimentary organic carbon to phosphorus ratios as a redox proxy in Quaternary records from the Mediterranean , 2010 .

[17]  R. Spicer,et al.  Mid-Cretaceous floras and climate of the Russian high Arctic (Novosibirsk Islands, Northern Yakutiya) , 2010 .

[18]  M. Kuypers,et al.  Phosphorus cycling from the margin to abyssal depths in the proto-Atlantic during oceanic anoxic event 2 , 2010 .

[19]  Stefan Schouten,et al.  A CO2 decrease-driven cooling and increased latitudinal temperature gradient during the mid-Cretaceous Oceanic Anoxic Event 2 , 2010 .

[20]  H. Jenkyns.  Geochemistry of oceanic anoxic events , 2010 .

[21]  Karline Soetaert,et al.  Solving Differential Equations in R: Package deSolve , 2010 .

[22]  B. Gustafsson,et al.  Phosphorus recycling and burial in Baltic Sea sediments with contrasting redox conditions , 2010 .

[23]  F. Rodríguez-Tovar,et al.  Sea-level dynamics and palaeoecological factors affecting trace fossil distribution in Eocene turbiditic deposits (Gorrondatxe section, N Spain) , 2010 .

[24]  J. Damsté,et al.  Reconstruction of water column anoxia in the equatorial Atlantic during the Cenomanian–Turonian oceanic anoxic event using biomarker and trace metal proxies , 2009 .

[25]  I. Jarvis,et al.  The Cenomanian–Turonian boundary event, OAE2 and palaeoenvironmental change in epicontinental seas: New insights from the dinocyst and geochemical records , 2009 .

[26]  L. Levin,et al.  Coastal hypoxia and sediment biogeochemistry , 2009 .

[27]  D. Z. Piper,et al.  A marine biogeochemical perspective on black shale deposition , 2009 .

[28]  M. Kuypers,et al.  Pyrite oxidation during sample storage determines phosphorus fractionation in carbonate-poor anoxic sediments , 2009 .

[29]  M. Böttcher,et al.  Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207) , 2009 .

[30]  D. Bartels,et al.  Organic carbon deposition and phosphorus accumulation during Oceanic Anoxic Event 2 in Tarfaya, Morocco , 2008 .

[31]  C. Slomp,et al.  Modeling phosphorus cycling and carbon burial during Cretaceous Oceanic Anoxic Events , 2008 .

[32]  R. Müller,et al.  Long-Term Sea-Level Fluctuations Driven by Ocean Basin Dynamics , 2008, Science.

[33]  L. Levin,et al.  Short-term fate of phytodetritus in sediments across the Arabian Sea Oxygen Minimum Zone , 2008 .

[34]  E. Ingall,et al.  Sedimentary Corg:P ratios, paleocean ventilation, and Phanerozoic atmospheric pO2 , 2007 .

[35]  Henk A. Dijkstra,et al.  Climate model boundary conditions for four Cretaceous time slices , 2007 .

[36]  H. Jenkyns,et al.  Cretaceous oceanic anoxic events: causes and consequences , 2007 .

[37]  Stefan Schouten,et al.  Mid-Cretaceous (Albian–Santonian) sea surface temperature record of the tropical Atlantic Ocean , 2007 .

[38]  J. Marotzke,et al.  Temporal Variability of the Atlantic Meridional Overturning Circulation at 26.5°N , 2007, Science.

[39]  P. Hofmann,et al.  Consequences of moderate ∼25,000 yr lasting emission of light CO 2 into the mid-Cretaceous ocean , 2007 .

[40]  M. Levasseur,et al.  Ocean Biogeochemical Dynamics , 2007 .

[41]  K. Föllmi,et al.  Phosphorus and the roles of productivity and nutrient recycling during oceanic anoxic event 2 , 2007 .

[42]  R. Leckie,et al.  13. A PALEONTOLOGICAL SYNTHESIS OF ODP LEG 210, NEWFOUNDLAND BASIN , 2007 .

[43]  J. Marotzke,et al.  Temporal variability of the Atlantic meridional overturning circulation at 26.5 degrees N. , 2007, Science.

[44]  C. Slomp,et al.  The global marine phosphorus cycle: sensitivity to oceanic circulation , 2006 .

[45]  F. Anselmetti,et al.  Proceedings of the Ocean Drilling Program. Scientific Results , 2006 .

[46]  J. Erbacher,et al.  Benthic foraminiferal assemblages from Demerara Rise (ODP Leg 207, western tropical Atlantic): possible evidence for a progressive opening of the Equatorial Atlantic Gateway , 2006 .

[47]  Richard D. Norris,et al.  A multiple proxy and model study of Cretaceous upper ocean temperatures and atmospheric CO2 concentrations , 2006 .

[48]  T. White,et al.  Organic carbon production and preservation in response to sea-level changes in the Turonian Carlile Formation, U.S. Western Interior Basin , 2006 .

[49]  C. Bjerrum,et al.  Modeling organic carbon burial during sea level rise with reference to the Cretaceous , 2006 .

[50]  John A. Harrison,et al.  Dissolved inorganic phosphorus export to the coastal zone: Results from a spatially explicit, global model , 2005 .

[51]  R. Duncan,et al.  Trace element abundances in the Rock Canyon Anticline, Pueblo, Colorado, marine sedimentary section and their relationship to Caribbean plateau construction and oxygen anoxic event 2 , 2005 .

[52]  T. Bralower,et al.  Paleoceanographic significance of high-resolution carbon isotope records across the Cenomanian–Turonian boundary in the Western Interior and New Jersey coastal plain, USA , 2005 .

[53]  P. Wilson,et al.  Stable organic carbon isotope stratigraphy across Oceanic Anoxic Event 2 of Demerara Rise, western tropical Atlantic , 2005 .

[54]  J. Damsté,et al.  Black shale deposition on the northwest African Shelf during the Cenomanian/Turonian oceanic anoxic event: Climate coupling and global organic carbon burial , 2005 .

[55]  H. Schulz,et al.  Large Sulfur Bacteria and the Formation of Phosphorite , 2005, Science.

[56]  Stefan Schouten,et al.  High temperatures in the Late Cretaceous Arctic Ocean , 2004, Nature.

[57]  R. Pancost,et al.  Orbital forcing of organic carbon burial in the proto-North Atlantic during oceanic anoxic event 2 , 2004 .

[58]  A. Gale,et al.  Midlatitude shelf seas in the Cenomanian‐Turonian greenhouse world: Temperature evolution and North Atlantic circulation , 2004 .

[59]  A. Nederbragt,et al.  Modelling oceanic carbon and phosphorus fluxes: implications for the cause of the late Cenomanian Oceanic Anoxic Event (OAE2) , 2004, Journal of the Geological Society.

[60]  Jochen Erbacher,et al.  Proceedings of the Ocean Drilling Program, 207 Initial Reports , 2004 .

[61]  R. Pancost,et al.  Further evidence for the development of photic-zone euxinic conditions during Mesozoic oceanic anoxic events , 2004, Journal of the Geological Society.

[62]  C. Slomp,et al.  Controls on phosphorus regeneration and burial during formation of eastern Mediterranean sapropels , 2004 .

[63]  H. Drange,et al.  Effects of solar irradiance forcing on the ocean circulation and sea-ice in the North Atlantic in an isopycnic coordinate ocean general circulation model , 2004 .

[64]  Stefan Schouten,et al.  Extremely high sea-surface temperatures at low latitudes during the middle Cretaceous as revealed by archaeal membrane lipids , 2003 .

[65]  Timothy M. Lenton,et al.  Periodic mid‐Cretaceous oceanic anoxic events linked by oscillations of the phosphorus and oxygen biogeochemical cycles , 2003 .

[66]  R. Norris,et al.  Extreme polar warmth during the Cretaceous greenhouse? Paradox of the late Turonian δ18O record at Deep Sea Drilling Project Site 511 , 2003 .

[67]  R. Jacob,et al.  Did the rifting of the Atlantic Ocean cause the Cretaceous thermal maximum , 2003 .

[68]  R. Norris,et al.  Extreme Polar Warmth during the Cretaceous Greenhouse? the Paradox of the Late Turonian d18O Record at DSDP Site 511 , 2003 .

[69]  M. Fasham,et al.  Ocean biogeochemistry: the role of the ocean carbon cycle in global change , 2003 .

[70]  R. Pancost,et al.  Enhanced productivity led to increased organic carbon burial in the euxinic North Atlantic basin during the late Cenomanian oceanic anoxic event , 2002 .

[71]  R. Leckie,et al.  Oceanic anoxic events and plankton evolution: Biotic response to tectonic forcing during the mid-Cretaceous , 2002 .

[72]  A. Gale,et al.  Global correlation of Cenomanian (Upper Cretaceous) sequences: Evidence for Milankovitch control on sea level , 2002 .

[73]  C. Slomp,et al.  Enhanced regeneration of phosphorus during formation of the most recent eastern Mediterranean sapropel (S1) , 2002 .

[74]  R. Norris,et al.  Deep-sea paleotemperature record of extreme warmth during the Cretaceous , 2002 .

[75]  C. Shields,et al.  Late Cretaceous ocean: Coupled simulations with the National Center for Atmospheric Research Climate System Model , 2002 .

[76]  R. Wollast.  Continental Margins — Review of Geochemical Settings , 2002 .

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

[78]  C. Tamburini,et al.  Biopolymer hydrolysis and bacterial production under ambient hydrostatic pressure through a 2000 m water column in the NW Mediterranean , 2002 .

[79]  E. Barron,et al.  Response of the Mid-Cretaceous global oceanic circulation to tectonic and CO2 forcings , 2001 .

[80]  F. Mackenzie,et al.  Influence of the human perturbation on carbon, nitrogen, and oxygen biogeochemical cycles in the global coastal ocean , 2001 .

[81]  S. Schenau,et al.  Phosphorus regeneration vs. burial in sediments of the Arabian Sea , 2001 .

[82]  L. Hinnov,et al.  Integrated Quantitative Stratigraphy of the Cenomanian-Turonian Bridge Creek Limestone Member Using Evolutive Harmonic Analysis and Stratigraphic Modeling , 2001 .

[83]  R. Norris,et al.  Increased thermohaline stratification as a possible cause for an ocean anoxic event in the Cretaceous period , 2001, Nature.

[84]  A. Klaus,et al.  INTRODUCTION: CRETACEOUS-PALEOGENE CLIMATIC EVOLUTION OF THE WESTERN NORTH ATLANTIC, RESULTS FROM ODP LEG 171B, BLAKE NOSE 1 , 2001 .

[85]  M. Pawlewicz,et al.  Deposition of sedimentary organic matter in black shale facies indicated by the geochemistry and petrography of high-resolution samples, Blake Nose, western North Atlantic , 2001, Geological Society, London, Special Publications.

[86]  A. Gale,et al.  Marine biodiversity through the Late Cenomanian–Early Turonian: palaeoceanographic controls and sequence stratigraphic biases , 2000, Journal of the Geological Society.

[87]  S. Voigt.  Cenomanian–Turonian composite δ13C curve for Western and Central Europe: the role of organic and inorganic carbon fluxes , 2000 .

[88]  S. Schenau,et al.  A novel chemical method to quantify fish debris in marine sediments , 2000 .

[89]  K. Miller,et al.  The Cenomanian/Turonian carbon burial event, Bass River, NJ, USA: Geochemical, paleoecological, and sea-level changes , 1999 .

[90]  中田 喜三郎,et al.  Regional Ocean Circulation Modelによる北太平洋のクロロフロオロカーボン分布の再現 , 1999 .

[91]  J. Damsté,et al.  A euxinic southern North Atlantic Ocean during the Cenomanian/Turonian oceanic anoxic event , 1998 .

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

[93]  Karline Soetaert,et al.  Empirical relationships for use in global diagenetic models , 1997 .

[94]  R. Littke,et al.  Evolution patterns of radiolaria and organic matter variations: A new approach to identify sea-level changes in mid-Cretaceous pelagic environments , 1996 .

[95]  G. Filippelli,et al.  Phosphorus geochemistry of equatorial Pacific sediments , 1996 .

[96]  K. Föllmi,et al.  The phosphorus cycle, phosphogenesis and marine phosphate-rich deposits , 1996 .

[97]  C. Slomp,et al.  Phosphorus binding by poorly crystalline iron oxides in North Sea sediments , 1996 .

[98]  M. Narkiewicz.  B.J. Katz & L.M. Pratt (Eds) - Source rocks in a sequence stratigraphic framework; A. Y. Huc (Ed.)Paleogeography, paleoclimate, and source rocks , 1996 .

[99]  A. Huc.  Paleogeography, Paleoclimate, and Source Rocks , 1995 .

[100]  K. Föllmi.  160 m.y. record of marine sedimentary phosphorus burial: Coupling of climate and continental weathering under greenhouse and icehouse conditions , 1995 .

[101]  S. Cande,et al.  Evolution of a major oceanographic pathway: the equatorial atlantic , 1995, Geological Society, London, Special Publications.

[102]  W. Kuhnt,et al.  Cenomanian-Turonian Source Rocks: Paleobiogeographic and Paleoenvironmental Aspects , 1995 .

[103]  Ellery D. Ingall,et al.  Benthic phosphorus regeneration, net primary production, and ocean anoxia: A model of the coupled marine biogeochemical cycles of carbon and phosphorus , 1994 .

[104]  J. King,et al.  Varve calibrated records of carbonate and organic carbon accumulation over the last 2000 years in the Black Sea , 1994 .

[105]  D. Pollard,et al.  Model simulations of Cretaceous climates: the role of geography and carbon dioxide , 1994 .

[106]  P. Valdes,et al.  Model Simulations of Cretaceous Climates - the Role of Geography and Carbon-dioxide - Discussion , 1993 .

[107]  K. Ruttenberg.  Reassessment of the oceanic residence time of phosphorus , 1993 .

[108]  R. Berner,et al.  AUTHIGENIC APATITE FORMATION AND BURIAL IN SEDIMENTS FROM NON-UPWELLING, CONTINENTAL MARGIN ENVIRONMENTS , 1993 .

[109]  R. Bustin,et al.  Influence of water column anoxia on the burial and preservation of carbon and phosphorus in marine shales , 1993 .

[110]  Janet W. Campbell,et al.  New production in the North Atlantic derived from seasonal patterns of surface chlorophyll , 1992 .

[111]  A. Knap,et al.  Seasonal variability in primary production and particle flux in the northwestern Sargasso Sea: U.S. JGOFS Bermuda Atlantic time-series study , 1992 .

[112]  J. Hayes,et al.  Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO2 levels. , 1992, Global biogeochemical cycles.

[113]  K. Baker,et al.  Estimation of Seasonal Primary Production From Moored Optical Sensors in the Sargasso Sea , 1992 .

[114]  J. Herbin,et al.  Distribution of Cenomanian-Turonian Organic Facies in the Western Mediterranean and Along the Adjacent Atlantic Margin: Chapter 10 , 1990 .

[115]  W. Dean,et al.  Geochemical and climatic effects of increased marine organic carbon burial at the Cenomanian/Turonian boundary , 1988, Nature.

[116]  P. Scholle,et al.  The Cenomanian-Turonian Oceanic Anoxic Event, I. Stratigraphy and distribution of organic carbon-rich beds and the marine δ13C excursion , 1987, Geological Society, London, Special Publications.

[117]  C. Müller,et al.  Organic-rich sedimentation at the Cenomanian-Turonian boundary in oceanic and coastal basins in the North Atlantic and Tethys , 1986, Geological Society, London, Special Publications.

[118]  Bruce B. Benson,et al.  The concentration and isotopic fractionation of oxygen dissolved in freshwater and seawater in equilibrium with the atmosphere1 , 1984 .

[119]  J. Parrish,et al.  Atmospheric circulation, upwelling, and organic-rich rocks in the Mesozoic and Cenozoic eras , 1982 .

[120]  P. Scholle,et al.  Carbon Isotope Fluctuations in Cretaceous Pelagic Limestones: Potential Stratigraphic and Petroleum Exploration Tool , 1980 .

[121]  A. G. Fischer,et al.  Upper Cretaceous–Paleocene magnetic stratigraphy at Gubbio, Italy I. Lithostratigraphy and sedimentology , 1977 .

[122]  W. Lowrie,et al.  Upper Cretaceous–Paleocene magnetic stratigraphy at Gubbio, Italy III. Upper Cretaceous magnetic stratigraphy , 1977 .

[123]  W. Ryan,et al.  Ignorance Concerning Episodes of Ocean-Wide Stagnation* , 1977 .

[124]  I. Lloyd.  Primary Production Off the Coast of North-West Africa , 1971 .

[125]  Douglas L. Inman,et al.  On the Tectonic and Morphologic Classification of Coasts , 1971, The Journal of Geology.

[126]  R. Weiss.  The solubility of nitrogen, oxygen and argon in water and seawater , 1970 .