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Selenium geochemistry and isotopic composition of sediments from the Cariaco Basin and the Bermuda Rise: a comparison between a restricted basin and the open ocean over the last 500 ka.

By Andrew James Teignmouth Shore


Broad changes in atmospheric oxygen have been identified for the last 4 Ga whereas changes in ocean oxygenation are not as well constrained. Mo isotope ratios have already been suggested as a potential global ocean palaeoredox proxy. However, a shorter oceanic residence time, theoretically greater isotope shifts, and no reliance on free H2S to alter its isotope composition, suggest Se isotope ratios could be a better global ocean palaeoredox proxy. \ud The Cariaco Basin, on the Venezuela margin, has been the subject of numerous palaeoceanographic studies. Alternating laminated and non-laminated sediments indicate cyclical changes in water column oxygenation. It is therefore an ideal natural laboratory in which to study these effects on Se isotopes. A comparison with the Bermuda Rise, in the western North Atlantic, over the same time period, allows an evaluation of the spatial variations of sedimentary Se isotope signatures. \ud Over the last interglacial-glacial transition, laminated (interglacial) sediments from the Cariaco Basin are characterised by high Se (~10 ppm) and high δ82/76Se (~0.03‰). In contrast, sediments from non-laminated (glacial) sediments have low Se (~0.5 ppm) and negative δ82/76Se (~-0.97‰). These end members result from two modes of Se cycling. Laminated sediments are dominated by organically-bound Se and low Se/Corg. Bioturbated sediments have a higher proportion of authigenic Se and higher Se/Corg. Over older interglacial-glacial cycles, the relationship between the two end-members and interglacial-glacial states becomes less clear. Similar end-members to those in the Cariaco Basin exist in the Bermuda Rise except the low δ82/76Se end-member has lower Se concentrations. As in the Cariaco Basin, variations are controlled by local climate rather than overall interglacial-glacial state. A comparison of the δ82/76Se values for the two sites show similarities which suggest that Se isotope ratios might not be just recording local changes

Publisher: University of Leicester
Year: 2011
OAI identifier: oai:lra.le.ac.uk:2381/9010

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  1. (1989). A 17,000-year glacio-eustatic sea level record: Influence of glacial melting rates on the Younger Dryas event and deep-ocean circulation.
  2. (1987). A global atmospheric selenium budget.
  3. (1983). A handbook of inductively coupled plasma spectrometry.
  4. (1991). A high-resolution late Quaternary upwelling record from the anoxic Cariaco Basin,
  5. (2009). A marine biogeochemical perspective on black shale deposition.
  6. (1997). A pervasive millennial-scale cycle in North Atlantic Holocene and glacial climates.
  7. (2005). A Pliocene-Pleistocene stack of 57 globally distributed benthic δ 18O records.
  8. (2004). A review of mass-dependent fractionation of selenium isotopes and implications for other heavy stable isotopes.
  9. (1997). A warm future in the past.
  10. (1998). Abrupt climate events 500,000 to 340,000 years ago: Evidence from subpolar North Atlantic sediments.
  11. (2004). Abrupt tropical vegetation response to rapid climate changes.
  12. (1994). Abyssal currents and advection of resuspended sediment along the northeastern Bermuda Rise.
  13. (1996). Accretion of extraterrestrial matter during the last 80 million years and its effect on the marine osmium isotope record.
  14. (1990). Adsorption of selenium by amorphous iron oxyhydroxide and manganese dioxide.
  15. (2000). Alkenone unsaturation estimates of sea-surface temperatures at Site 1002 over a full glacial cycle.
  16. (1967). Amazon River: Environmental factors that control its dissolved and suspended load.
  17. (1984). Ammonium adsorption in marine sediments.
  18. (2008). An 85-ka record of climate change in lowland Central America.
  19. (2001). An assessment of global and regional emissions of trace metals to the atmosphere from anthropogenic sources worldwide.
  20. (1980). Anoxic environments and oil source bed genesis.
  21. (2002). Astronomical age models for Pleistocene drift sediments from the western North Atlantic (ODP sites 1055-1063).
  22. (1998). Bacillus arsenicoselenatis, sp. nov., and Bacillus selenitireducens, sp. nov.: Two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic.
  23. (1995). Behavior of dissolved antimony, arsenic, and selenium in the Atlantic Ocean.
  24. (1991). Bioaccumulation of selenium by floating aquatic plants. Water, air, and soil pollution,
  25. (1994). Bioaccumulation of selenium from natural geologic sources in western states and its potential consequences.
  26. (2001). Biogenic silica record of the lake baikal response to climatic forcing during the brunhes.
  27. (2001). Biogeochemistry of sulfur isotopes.
  28. (1996). Brief interstadial events in the Santa Barbara basin, NE Pacific, during the past 60 kyr.
  29. (1982). Burial of organic carbon and pyrite sulfur in the modern ocean: Its geochemical and environmental significance.
  30. (1992). Carbon-sulfur-iron systematics of the uppermost deepwater sediments of the Black Sea.
  31. (1993). Century-scale events in monsoonal climate over the past 24,000 years.
  32. (2002). Changes in deep and intermediate water properties in the western North Atlantic during marine isotope stages 11-12: Evidence from ODP Leg 172.
  33. (2007). Chapter Fourteen Elemental Proxies for Palaeoclimatic and Palaeoceanographic Variability in Marine Sediments: Interpretation and Application.
  34. (1998). Chemical composition of the continental crust as revealed by studies in east China.
  35. (1987). Chemical equilibria of selenium in soils; a theoretical development.
  36. (1999). Chemical influences on trace metal-sulfide interactions in anoxic sediments.
  37. Chemistry of submarine hydrothermal solutions at 21 °N, East Pacific Rise.
  38. (2001). Chemoautotrophy in the redox transition zone of the Cariaco Basin: A significant midwater source of organic carbon production.
  39. (1998). Clay mineral distribution and significance in quaternary sediments of the Amazon fan.
  40. (1966). Clay minerals and geomorphology in four Caribbean Islands.
  41. (1999). Climate and atmospheric history of the past 420,000 years from the Vostok ice core,
  42. (2007). Climate-correlated variations in seawater 187Os/188Os over the past 200,000 yr: Evidence from the Cariaco Basin,
  43. (1997). Climatic instability, ice sheets and ocean dynamics at high northern latitudes during the last glacial period (58-10
  44. (2000). Climatically sensitive eolian and hemipelagic deposition in the Cariaco Basin, Venezuela, over the past 578,000 years: Results from Al/Ti and K/Al.
  45. (1999). Comparative study of selenium requirements of three phytoplankton species: Gymnodinium catenatum, Alexandrium minutum (Dinophyta) and Chaetoceros cf. tenuissimus (Bacillariophyta).
  46. (1995). Complexity of Holocene climate as reconstructed from a Greenland Ice Core.
  47. (2003). Contrasting sulfur geochemistry and Fe/Al and Mo/Al ratios across the last oxic-to-anoxic transition in the Cariaco Basin, Venezuela.
  48. (2001). Controls on temporal variability of the geochemistry of the deep Cariaco Basin. Deep-Sea Research Part I: Oceanographic Research Papers,
  49. (2004). Copper isotope systematics of the Lucky Strike, Rainbow, and Logatchev sea-floor hydrothermal fields on the Mid-Atlantic Ridge.
  50. (1998). Correlation between Arabian Sea and Greenland climate oscillations of the past 110,000 years.
  51. (1993). Correlations between climate records from North Atlantic sediments and Greenland ice.
  52. (1982). Detection of glutathione peroxidases in some microalgae.
  53. (2006). Determination of selenium isotopic ratios by continuous-hydride-generation dynamic-reaction-cell inductively coupled plasma-mass spectrometry.
  54. (1985). Determination of selenium speciation in biogenic particles and sediments.
  55. (1998). Determination of selenium species in seawater by flow injection hydride generation in situ trapping followed by electrothermal atomic absorption spectrometry.
  56. (1983). Determination of trace arsenic, antimony, selenium and tellurium in various oxidation states in water by hydride generation and atomic-absorption spectrophotometry after enrichment and separation with thiol cotton.
  57. (2007). Determination of ultra-trace selenium in mineral samples by hydride generation atomic fluorescence spectrometry with pressurized-PTFE-vessel acid digestion.
  58. (1985). Dissolved inorganic and organic selenium in the Orca Basin.
  59. (1993). Distribution and mode of occurrence of selenium in US coals.
  60. (1977). Distribution and transport of suspended particulate material of the Amazon River in the ocean.
  61. (1997). Duration and structure of the past four interglaciations.
  62. (2008). Dynamic identification of moisture sources in the Orinoco Basin in
  63. (2001). Earth's Climate: Past and Future.
  64. (2008). Effective isotopic fractionation factors for solute removal by reactive sediments: A laboratory microcosm and slurry study.
  65. (1987). Effects of selenium deficiency on the morphology and ultrastructure of the coastal marine diatom Thalassiosira pseudonana (Bacillariophyceae).
  66. (1988). Eh-pH diagrams for geochemistry.
  67. (1983). Elimination of nitrite interference in the determination of selenium by hydride generation.
  68. (1990). Epidemiological investigation of selenium toxicosis in E-Xi Autonomous Prefecture.
  69. (1967). Estimation of mass absorption coefficients of Compton scattering: Improvements and extensions of the method.
  70. (1993). Evidence for general instability of past climate from a 250-kyr ice-core record.
  71. (2000). Evidence for mid-Eemian cooling in continental climatic record from Lake Baikal.
  72. (1993). Evidence of astronomical forcing of the earth's climate in Cretaceous and Cambrian times.
  73. (2001). Factors affecting the diagenesis of quaternary sediments at ODP leg 172 in western North Atlantic: Evidence from pore water and sediment geochemistry.
  74. (1996). Fluorine, selenium, sulphur and carbon contents of coal in Hubei province.
  75. (2000). Fractionation of selenium isotopes during bacterial respiratory reduction of selenium oxyanions.
  76. (1993). Frequency spectra and paleoclimatic variability of the high-resolution 30-1450 ka Funza I pollen record
  77. (1993). Geochemical signatures preserved in sediments of the Semaforo and Vrica sections (Calabria, Italy) and their relations with variations of the sedimentary regime.
  78. (1990). Geochemistry of sedimentary carbonates. Geochemistry of sedimentary carbonates,
  79. (1996). Geochemistry of the upper Jurassic-lower cretaceous Bazhenov Formation, West Siberia.
  80. (2006). Geological nitrogen cycle and atmospheric N2 over Phanerozoic time.
  81. (2008). Geology: The story of O2.
  82. (1992). Geomorphic/tectonic control of sediment discharge to the ocean: the importance of small mountainous rivers.
  83. (2000). GISP2 oxygen isotope ratios.
  84. (1998). Glacial/interglacial variations in production and nitrogen fixation in the Cariaco Basin during the last 580 kyr.
  85. (1996). Global Environment: Water, Air, and Geochemical Cycles. Upper Saddle River,
  86. (2004). Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint.
  87. (1997). Holocene climatic instability: A prominent, widespread event 8200 yr ago.
  88. (1997). How long and how stable was the last interglacial?
  89. (2000). Hydrological impact of Heinrich events in the subtropical Northeast Atlantic.
  90. (2000). Ice-core palaeoclimate records in tropical South America since the last glacial maximum.
  91. (1999). Indirect climatic control of the clay mineral composition of Quaternary sediments from the Cariaco basin, northern Venezuela (ODP Site 1002).
  92. (1991). Interference of copper, silver and gold in the determination of selenium by hydride generation atomic fluorescence spectrometry: An approach to the studies of transition metal interferences.
  93. (2001). Interspecific differences in the bioconcentration of selenite by phytoplankton and their ecological implications.
  94. (2005). Iron isotope constraints on the Archean and Paleoproterozoic ocean redox state.
  95. (1989). Iron-sulfur-carbon relationships in organic-carbon-rich sequences I: Cretaceous Western Interior seaway.
  96. (1966). Isotope geochemistry of sedimentary sulfates.
  97. (2007). Large selenium isotopic variations and its implication in the Yutangba Se deposit,
  98. (1991). Late Pleistocene continental climate and oceanic variability recorded in northwest Pacific sediments.
  99. (1990). Late Pleistocene variability of Arabian Sea summer monsoon winds and continental aridity: eolian records from the lithogenic component of deepsea sediments.
  100. (1997). Late Quaternary climate change from δ18O records of multiple species of planktonic foraminifera: High-resolution records from the anoxic Cariaco Basin,
  101. (2000). Late Quaternary stratigraphy and sedimentation at Site 1002, Cariaco Basin (Venezuela).
  102. (1988). Liu Xiu Ming, Xu Tong Chun, Liu Tung Sheng & An Zhi Sheng
  103. (1998). Major and minor element geochemistry of Lower Aptian sediments from
  104. (1997). Major features and forcing of high-latitude Northern Hemisphere atmospheric circulation using a 110 000-year-long glaciochemical series.
  105. (1995). Marine evidence for climatic instability during the last interglacial in shelf records from northwest Europe.
  106. (2000). Marine Geochemistry.
  107. (1996). Maritime emission of selenium to the atmosphere in eastern Mediterranean seas.
  108. (1976). Matrix corrections in traceelement analysis by X-ray fluorescence: An extension of the Compton scattering technique to long wavelengths.
  109. (2003). Meltwater pulse 1A from Antarctica as a trigger of the Bølling-Allerød warm interval.
  110. (2009). Metal Stable Isotopes in Low-Temperature Systems.
  111. (2007). Metal stable isotopes in paleoceanography.
  112. (1998). Metalloids in the high latitude North Atlantic Ocean: Sources and internal cycling.
  113. (2006). Microbial ecology of the Cariaco Basin's redoxcline: The US-Venezuela Cariaco Time Series Program. In:
  114. (1964). Microbial fractionation of sulfur isotopes.
  115. (1998). Millennial-scale climate instability during the early Pleistocene epoch.
  116. (1979). Mineralogical dispersal patterns of North Atlantic deep-sea sediments with particular reference to eolian dusts.
  117. (1980). Modeling the climatic response to orbital variations.
  118. (2005). Modelled atmospheric temperatures and global sea levels over the past million years.
  119. (1991). Modern and ancient continental shelf anoxia; an overview. In: R.V. Tyson and T.H. Pearson (eds) Modern and Ancient Continental Shelf Anoxia. London,
  120. (1995). Modern and Last Glacial Maximum eolian sedimentation patterns in the Atlantic Ocean interpreted from sediment iron oxide content.
  121. (2004). Modern preconcentration methods for the determination of selenium species in environmental water samples.
  122. (2008). Molybdenum isotope evidence for global ocean anoxia coupled with perturbations to the carbon cycle during the early Jurassic.
  123. (2003). Molybdenum isotope records as a potential new proxy for paleoceanography.
  124. (1975). Munsell Soil Color Charts.
  125. (2002). Natural variations of Se isotopic composition determined by hydride generation multiple collector inductively coupled plasma mass spectrometry.
  126. (1993). Nature of environmental changes in
  127. (2008). North American ice-sheet dynamics and the onset of 100,000-year glacial cycles.
  128. (1991). Ocean anoxia and the concentrations of molybdenum and vanadium in seawater.
  129. (2009). Oceanic forcing of the Marine Isotope Stage 11 interglacial.
  130. (2004). Optimal methods for estimating kinetic isotope effects from different forms of the Rayleigh distillation equation.
  131. (2000). Organic carbon fluxes, degradation, and accumulation in an anoxic basin: Sediment trap results from the Cariaco Basin. Limnology and Oceanography,
  132. (1999). Organic matter and trace element rich sapropels and black shales: A geochemical comparison.
  133. (1988). Origin and consequences of cyclic ice rafting in the Northeast Atlantic Ocean during the past 130,000 years.
  134. (1982). Origin of Cariaco Basin,
  135. (1997). Origin of sediment accumulation in the Orinoco delta and the Gulf of Paria: Amazon river sediment imput.
  136. (2002). Origin of seleniferous cherts in Yutangba Se deposit, southwest Enshi,
  137. (1985). Orinoco and Amazon River sediment input to the eastern Caribbean Basin.
  138. (2000). Oxygenation history of bottom waters in the Cariaco Basin, Venezuela, over the past 578,000 years: Results from redox-sensitive metals
  139. (2006). Pleistocene glacial terminations triggered by synchronous changes in Southern and Northern Hemisphere insolation: The insolation canon hypothesis.
  140. (2001). Pleistocene reduction of polar ice caps: Evidence from Cariaco Basin marine sediments.
  141. (1987). Primary production, new production and vertical flux in the eastern Pacific Ocean.
  142. (1997). Proceedings, initial reports, Ocean Drilling Program, Leg 165, Caribbean ocean history and the Cretaceous/Tertiary boundary event.
  143. (2000). Rapid changes in the hydrologic cycle of the tropical Atlantic during the last glacial.
  144. (1991). Reconstruction of Caribbean climate change over the past 10,500 years.
  145. (2004). Recycling lower continental crust in the North China craton.
  146. (2008). Redox renaissance.
  147. (2001). Redox-sensitive element uptake in north-east Atlantic Ocean sediments (Benthic Boundary Layer Experiment sites).
  148. (2003). Reduced sulfur in euxinic sediments of the Cariaco Basin: Sulfur isotope constraints on organic sulfur formation.
  149. (1992). Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian (Missourian) Stark Shale Member of the Dennis Limestone, Wabaunsee County,
  150. (2007). Reviews on atmospheric selenium: Emissions, speciation and fate.
  151. (2001). Role of ocens as biogenic sources of selenium.
  152. S.L.Meseck (2002)Modelling the biogeochemical cycle of selenium in the San Francisco Bay.
  153. (2007). Scaling NIST SRM 3149 for Se isotope analysis and isotopic variations of natural samples.
  154. (1996). Scavenged excess aluminum and its relationship to bulk titanium in biogenic sediment from the central equatorial Pacific Ocean.
  155. (2002). Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records.
  156. (2003). Seasonal and interannual variation in the hydrography of the Cariaco Basin: Implications for basin ventilation.
  157. (1994). Seawater as the source of minor elements in black shales, phosphorites and other sedimentary rocks.
  158. (1989). Selenate adsorption on alluvial soils.
  159. (1990). Selenium content and its oxidation-state in igneous rocks, rock-forming minerals, and a reservoir sediment.
  160. (1973). Selenium in certain metamorphic rocks.
  161. (1982). Selenium in reducing waters.
  162. (1986). Selenium in western Atlantic precipitation.
  163. (1972). Selenium isotope analysis and geochemical applications. PhD Dissertation
  164. (1966). Selenium isotope effects in the reduction of sodium selenite and of sodium selenate.
  165. (2003). Selenium isotope fractionation during reduction by Fe(II)-Fe(III) hydroxide-sulfate (green rust).
  166. (1999). Selenium isotope ratios as indicators of selenium sources and oxyanion reduction.
  167. (2000). Selenium isotope ratios in marine sediments and algae. A reconnaissance
  168. (2003). Selenium isotopes: a new oceanic paleoredox proxy? [1]
  169. (1985). Selenium isotopic fractionation during SeO3 reduction to Se and H2Se.
  170. (1987). Selenium sorption by kaolinite and montmorillonite.
  171. (2004). Selenium speciation in subantarctic and subtropical waters east of New Zealand: Trends and temporal variations. Deep-Sea Research Part I: Oceanographic Research Papers,
  172. (2000). Selenium stable isotope ratios as indicators of sources and cycling of selenium: Results from the northern reach of San Francisco Bay.
  173. (2002). Selenium stable isotope ratios in California agricultural drainage water management systems.
  174. (1991). Soil selenium fractionation, depth profiles and time trends in a vegetated site at Kesterson Reservoir. Water, air, and soil pollution,
  175. (2006). Sources and biogeochemical cycling of particulate selenium in the San Francisco Bay estuary.
  176. (2001). Sources and cycling of selenium in the western and equatorial Atlantic ocean. Deep-Sea Research Part II:
  177. (2001). Southward migration of the intertropical convergence zone through the holocene.
  178. (2004). Speciation and weathering of selenium in Upper Cretaceous chalk and shale from South Dakota and Wyoming,
  179. (1988). Specific selenium-containing macromolecules in the marine diatom Thalassiosira pseudonana.
  180. (1997). Sr-Nd isotopes as tracers of fine-grained detrital sediments: The South- Barbados accretionary prism during the last 150 kyr.
  181. (2003). Stable isotope fractionation of selenium by natural microbial consortia.
  182. (1997). Storage of aqueous solutions of selenium for speciation at trace level. Fresenius'
  183. (1998). Strontium isotopic compositions and paleoceanographic implication of fossil manganese nodules in DSDP/ODP cores,
  184. (2004). Subsurface processes at the lucky strike hydrothermal field, Mid-Atlantic ridge: Evidence from sulfur, selenium, and iron isotopes.
  185. (1978). Suspended matter and bottom deposits of the Orinoco delta: Turbidity, mineralogy and elementary composition.
  186. (2003). Synchroneity of tropical and high-latitude Atlantic temperatures over the last glacial termination.
  187. (2008). Synthesis of history of the Cariaco Basin 4.2.1. Location and Geological setting Se value. If authigenic enrichment of Se is occurring within the sediment then the Se:Corg ratio will begin to Chapter 7: Selenium in the Bermuda Rise Shore A.,
  188. (2001). Systematic studies on adsorption of 11 trace heavy metals on thiol cotton fiber.
  189. (2002). Systematic studies on adsorption of trace elements Pt,
  190. (1994). The astronomical theory of climate and the age of the Brunhes-Matuyama magnetic reversal.
  191. (2001). The behaviour of selenium in geological processes.
  192. (1975). The Cariaco Basin (Trench).
  193. (1984). The Chemical Evolution of the Atmosphere and Oceans.
  194. (1991). The composition of clay minerals transported to Israel as indicators of Saharan dust emission. Atmospheric Environment -
  195. (1995). The composition of the continental crust.
  196. (1985). The Continental Crust: its Composition and Evolution. An Examination of the Geochemical Record Preserved in Sedimentary Rocks. The Continental Crust: its Composition and Evolution. An Examination of the Geochemical Record Preserved in Sedimentary Rocks.
  197. (2000). The importance of selenium to human health.
  198. (2008). The isotopic signature of the global riverine molybdenum flux and anoxia in the ancient oceans.
  199. (1957). The kinetic isotope effect in the chemical reduction of sulphate.
  200. (1984). The marine biogeochemistry of selenium: a re-evaluation.
  201. (1988). The mechanism of transition metal interference in hydride generation atomic absorption spectrometry. Spectrochimica Acta Part B: Atomic Spectroscopy,
  202. (1992). The Montaigu Event: An abrupt climatic change during the early Wurm in Europe. In: G.J. Kukla and E. Went (eds) Start of a Glacial.
  203. (1996). The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. Palaeoclimatology and palaeoceanography from laminated sediments.
  204. (1984). The orbital theory of Pleistocene climate: support from a revised chronology of the marine d18O record. Milankovitch and climate.
  205. (2006). The oxygenation of the atmosphere and oceans.
  206. (2004). The Phanerozoic Carbon Cycle: CO2 and O2.
  207. (1993). The release of trace elements by dying marine phytoplankton.
  208. (2008). The southern hemisphere at glacial terminations: Insights from the Dome C ice core.
  209. (2001). The timing of the last deglaciation in North Atlantic climate records.
  210. (1962). Thermodynamic properties and geochemistry of isotopic compounds of selenium.
  211. (2000). Timing of early diagenetic sulfurization of organic matter: A precursor-product relationship in Holocene sediments of the anoxic Cariaco Basin,
  212. (1997). Trace element (Se, As, Mo, B) contamination of evaporites in hypersaline agricultural evaporation ponds.
  213. (1991). Trace elements in aerosol particles from Bermuda and Barbados: concentrations, sources and relationships to aerosol sulfate.
  214. (1995). Trace elements in the atmosphere over the North Atlantic.
  215. (1987). Trace metal geochemistry in the Cariaco Trench.
  216. (2006). Trace metals as paleoredox and paleoproductivity proxies: An update.
  217. (1996). Two-step deglaciation at the oxygen isotope stage 6/5E transition: The Zeifen-Kattegat climate oscillation.
  218. (2006). Variability in the mean latitude of the Atlantic Intertropical Convergence Zone as recorded by riverine input of sediments to the Cariaco Basin (Venezuela).
  219. (1997). Variability of the North Atlantic thermohaline circulation during the last interglacial period.
  220. (1993). What atmospheric oxygen measurements can tell us about the global carbon cycle.

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