Global Core Top Calibration of δ18O in Planktic Foraminifera to Sea Surface Temperature

The oxygen isotopic composition of planktic foraminiferal calcite ( δ18Oc ) is one of the most prevalent proxies used in the paleoceanographic community. The relationship between δ18Oc , temperature, and seawater oxygen isotopic composition ( δ18Ow ) is firmly rooted in thermodynamics, and experimental constraints are commonly used for sea surface temperature (SST) reconstructions. However, in marine sedimentary applications, additional sources of uncertainty emerge, and these uncertainty constraints have not as of yet been included in global calibration models. Here, we compile a global data set of over 2,600 marine sediment core top samples for five planktic species: Globigerinoides ruber, Trilobatus sacculifer, Globigerina bulloides, Neogloboquadrina incompta, and Neogloboquadrina pachyderma. We developed a suite of Bayesian regression models to calibrate the relationship between δ18Oc and SST. Spanning SSTs from 0.0 to 29.5 °C, our annual model with species pooled together has a mean standard error of approximately 0.54‰. Accounting for seasonality and species‐specific differences improves model validation, reducing the mean standard error to 0.47‰. Example applications spanning the Late Quaternary show good agreement with independent alkenone‐based estimates. Our pooled calibration model may also be used for reconstruction in the deeper geological past, using modern planktic foraminifera as an analog for non‐extant species. Our core top‐based models provide a robust assessment of uncertainty in the δ18Oc paleothermometer that can be used in statistical assessments of interproxy and model‐proxy comparisons. The suite of models is publicly available as the Open Source software library bayfox, for Python, R, and MATLAB/Octave.

[1]  T. Quinn,et al.  Considerations for Globigerinoides ruber (White and Pink) Paleoceanography: Comprehensive Insights From a Long‐Running Sediment Trap , 2019, Paleoceanography and Paleoclimatology.

[2]  J. Tierney,et al.  BAYSPLINE: A New Calibration for the Alkenone Paleothermometer , 2018 .

[3]  Stephan Hoyer,et al.  xarray: N-D labeled arrays and datasets in Python , 2017 .

[4]  R. Thunell,et al.  Evaluating controls on planktonic foraminiferal geochemistry in the Eastern Tropical North Pacific , 2016 .

[5]  N. Slowey,et al.  A new perspective on West African hydroclimate during the last deglaciation , 2016 .

[6]  D. Nürnberg,et al.  South Asian summer monsoon variability during the last ∼54 kyrs inferred from surface water salinity and river runoff proxies , 2016 .

[7]  John Salvatier,et al.  Probabilistic programming in Python using PyMC3 , 2016, PeerJ Comput. Sci..

[8]  A. Mackensen,et al.  Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left , 2016 .

[9]  Richard McElreath,et al.  Statistical Rethinking: A Bayesian Course with Examples in R and Stan , 2015 .

[10]  T. Marchitto,et al.  Dynamical excitation of the tropical Pacific Ocean and ENSO variability by Little Ice Age cooling , 2015, Science.

[11]  A. Mix,et al.  North Pacific deglacial hypoxic events linked to abrupt ocean warming , 2015, Nature.

[12]  Travis E. Oliphant,et al.  Guide to NumPy , 2015 .

[13]  Aki Vehtari,et al.  Practical Bayesian model evaluation using leave-one-out cross-validation and WAIC , 2015, Statistics and Computing.

[14]  R. Zahn,et al.  Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years , 2014 .

[15]  John K. Kruschke,et al.  Doing Bayesian Data Analysis: A Tutorial with R, JAGS, and Stan , 2014 .

[16]  R. Schneider,et al.  Links between southwestern tropical Indian Ocean SST and precipitation over southeastern Africa over the last 17 kyr , 2014 .

[17]  A. Mix,et al.  Late Glacial to Holocene radiocarbon constraints on North Pacific Intermediate Water ventilation and deglacial atmospheric CO2 sources , 2014 .

[18]  I. Yashayaev,et al.  Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age , 2014 .

[19]  Jessica E. Tierney,et al.  A Bayesian, spatially-varying calibration model for the TEX86 proxy , 2014 .

[20]  Y. Rosenthal,et al.  Deglacial δ18O and hydrologic variability in the tropical Pacific and Indian Oceans , 2014 .

[21]  P. deMenocal,et al.  Meridional shifts of the Atlantic intertropical convergence zone since the Last Glacial Maximum , 2013 .

[22]  A. Mackensen,et al.  Deglaciation in the tropical Indian Ocean driven by interplay between the regional monsoon and global teleconnections , 2013 .

[23]  Andreas Mackensen,et al.  Deglacial intermediate water reorganization: new evidence from the Indian Ocean , 2013 .

[24]  Robert F Spielhagen,et al.  Atlantic Water advection versus sea-ice advances in the eastern Fram Strait during the last 9 ka - multiproxy evidence for a two-phase Holocene , 2013 .

[25]  Lester Lembke-Jene,et al.  Deglacial development of (sub) sea surface temperature and salinity in the subarctic northwest Pacif , 2013 .

[26]  A. Koutavas,et al.  El Niño–Southern Oscillation extrema in the Holocene and Last Glacial Maximum , 2012 .

[27]  J. Lynch‐Stieglitz,et al.  Solar forcing of Florida Straits surface salinity during the early Holocene , 2012 .

[28]  B. Otto‐Bliesner,et al.  Impact of abrupt deglacial climate change on tropical Atlantic subsurface temperatures , 2012, Proceedings of the National Academy of Sciences.

[29]  F. Sierro,et al.  Seasonal and interannual changes of planktic foraminiferal fluxes in the Gulf of Lions (NW Mediterranean) and their implications for paleoceanographic studies: Two 12-year sediment trap records , 2012 .

[30]  J. Duplessy,et al.  Mg/Ca-paleothermometry in the western Mediterranean Sea on planktonic foraminifer species Globigerina bulloides : Constraints and implications , 2012 .

[31]  T. Herbert,et al.  Alkenone unsaturation in surface sediments from the eastern equatorial Pacific: Implications for SST reconstructions , 2012 .

[32]  H. Kawahata,et al.  Seasonal variation in the oxygen isotopic composition of different-sized planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northwestern North Pacific and implications for reconstruction of the paleoenvironment , 2011 .

[33]  Henry Elderfield,et al.  Reconstructing North Atlantic deglacial surface hydrography and its link to the Atlantic overturning circulation , 2011 .

[34]  Andrew Gelman,et al.  The No-U-turn sampler: adaptively setting path lengths in Hamiltonian Monte Carlo , 2011, J. Mach. Learn. Res..

[35]  C. Morigi,et al.  Further constraints on the diagenetic influences and salinity effect on Globigerinoides ruber (white) Mg/Ca thermometry: Implications in the Mediterranean Sea , 2011 .

[36]  D. Oppo,et al.  Reconstructing the thermal structure of the upper ocean: Insights from planktic foraminifera shell chemistry and alkenones in modern sediments of the tropical eastern Indian Ocean , 2011 .

[37]  J. Valley,et al.  Planktonic foraminiferal oxygen isotope analysis by ion microprobe technique suggests warm tropical sea surface temperatures during the Early Paleogene , 2011 .

[38]  G. Kontakiotis,et al.  Field‐based validation of a diagenetic effect on G. ruber Mg/Ca paleothermometry: Core top results from the Aegean Sea (eastern Mediterranean) , 2011 .

[39]  A. Mix,et al.  The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia , 2011 .

[40]  M. Kučera,et al.  A revised taxonomic and phylogenetic concept for the planktonic foraminifer species Globigerinoides , 2011 .

[41]  M. Schulz,et al.  Improving temperature estimates derived from Mg/Ca of planktonic foraminifera using X‐ray computed tomography–based dissolution index, XDX , 2011 .

[42]  R. Zahn,et al.  Contrasting multiproxy reconstructions of surface ocean hydrography in the Agulhas Corridor and implications for the Agulhas Leakage during the last 345,000 years , 2010 .

[43]  E. C. Farmer,et al.  On the fidelity of shell-derived δ18Oseawater estimates , 2010 .

[44]  W. Kuhnt,et al.  Indo-Pacific Warm Pool variability during the Holocene and Last Glacial Maximum , 2010 .

[45]  P. Valdes,et al.  Modelling the oxygen isotope distribution of ancient seawater using a coupled ocean–atmosphere GCM: Implications for reconstructing early Eocene climate , 2010 .

[46]  J. Groeneveld,et al.  Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean , 2010 .

[47]  Franck Bassinot,et al.  Salinity bias on the foraminifera Mg/Ca thermometry: Correction procedure and implications for past ocean hydrographic reconstructions , 2009 .

[48]  Y. Rosenthal,et al.  2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool , 2009, Nature.

[49]  S. Mulitza,et al.  Stable isotopes of planktonic foraminifera from tropical Atlantic/Caribbean core-tops: Implications for reconstructing upper ocean stratification , 2009 .

[50]  M. Weinelt,et al.  Reassessing Mg/Ca temperature calibrations of Neogloboquadrina pachyderma (sinistral) using paired δ44/40Ca and Mg/Ca measurements , 2009 .

[51]  R. Tiedemann,et al.  Calibrating Mg/Ca ratios of multiple planktonic foraminiferal species with δ 18 O-calcification temperatures: Paleothermometry for the upper water column , 2009 .

[52]  J. Sachs,et al.  Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry , 2008 .

[53]  J. Duplessy,et al.  Mg/Ca and Sr/Ca ratios in planktonic foraminifera: Proxies for upper water column temperature reconstruction , 2008, Paleoceanography.

[54]  D. Lea,et al.  Geochemical investigation of gametogenic calcite addition in the planktonic foraminifera Orbulina universa , 2008 .

[55]  Martin Ziegler,et al.  Interacting Loop Current variability and Mississippi River discharge over the past 400 kyr , 2008 .

[56]  J. Zachos,et al.  North American continental margin records of the Paleocene‐Eocene thermal maximum: Implications for global carbon and hydrological cycling , 2008 .

[57]  K. Darling,et al.  The genetic diversity of planktic foraminifera and the global distribution of ribosomal RNA genotypes , 2008 .

[58]  M. Kienast,et al.  Proxy dependence of the temporal pattern of deglacial warming in the tropical South China Sea: toward resolving seasonality , 2008 .

[59]  G. Dickens,et al.  Environmental precursors to rapid light carbon injection at the Palaeocene/Eocene boundary , 2007, Nature.

[60]  Axel Timmermann,et al.  Southern Hemisphere and Deep-Sea Warming Led Deglacial Atmospheric CO2 Rise and Tropical Warming , 2007, Science.

[61]  A. Mix,et al.  A multiproxy assessment of the western equatorial Pacific hydrography during the last 30 kyr , 2007 .

[62]  R. Schneider,et al.  155,000 Years of West African Monsoon and Ocean Thermal Evolution , 2007, Science.

[63]  J. N. Richey,et al.  1400 yr multiproxy record of climate variability from the northern Gulf of Mexico , 2007 .

[64]  John D. Hunter,et al.  Matplotlib: A 2D Graphics Environment , 2007, Computing in Science & Engineering.

[65]  G. Leduc,et al.  Moisture transport across Central America as a positive feedback on abrupt climatic changes , 2007, Nature.

[66]  Gavin A. Schmidt,et al.  Global gridded data set of the oxygen isotopic composition in seawater , 2006 .

[67]  E. Jansen,et al.  Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas , 2006 .

[68]  Nicholas J Shackleton,et al.  Paleoclimate history of Galapagos surface waters over the last 135,000 yr , 2006 .

[69]  L. Talley,et al.  Hydrography of the eastern tropical Pacific: A review , 2006 .

[70]  D. Oppo,et al.  Sea surface temperature pattern reconstructions in the Arabian Sea , 2006 .

[71]  R. Schneider,et al.  Deglacial sea surface temperature and salinity increase in the western tropical Atlantic in synchrony with high latitude climate instabilities , 2006 .

[72]  Weiguo Liu,et al.  Last deglaciation in the Okinawa Trough: Subtropical northwest Pacific link to Northern Hemisphere and tropical climate , 2005 .

[73]  R. Schneider,et al.  Holocene African droughts relate to eastern equatorial Atlantic cooling , 2005 .

[74]  L. Löwemark,et al.  Mg/Ca ratios of two Globigerinoides ruber (white) morphotypes: Implications for reconstructing past tropical/subtropical surface water conditions , 2005 .

[75]  R. Schneider,et al.  Climatic controls on central African hydrology during the past 20,000 years , 2005, Nature.

[76]  D. Oppo,et al.  Amplitude and timing of sea-surface temperature change in the northern South China Sea: Dynamic link to the East Asian monsoon , 2005 .

[77]  W. Howard,et al.  δ18O seasonality of planktonic foraminifera from Southern Ocean sediment traps: Latitudinal gradients and implications for paleoclimate reconstructions , 2005 .

[78]  G. Fischer,et al.  Sensitivity of planktic foraminifera to sea surface temperature and export production as derived from sediment trap data , 2005 .

[79]  T. Kiefer,et al.  A global compilation of late Holocene planktonic foraminiferal δ18O: relationship between surface water temperature and δ18O , 2005 .

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

[81]  A. Piola,et al.  The influence of the Plata River discharge on the western South Atlantic shelf , 2005 .

[82]  M. Canals,et al.  Planktonic response to main oceanographic changes in the Alboran Sea (Western Mediterranean) as documented in sediment traps and surface sediments , 2004 .

[83]  D. Lea,et al.  Links between salinity variation in the Caribbean and North Atlantic thermohaline circulation , 2004, Nature.

[84]  G. Wefer,et al.  Temperature:δ18O relationships of planktonic foraminifera collected from surface waters , 2003 .

[85]  M. Schulz,et al.  340,000-Year Centennial-Scale Marine Record of Southern Hemisphere Climatic Oscillation , 2003, Science.

[86]  Elizabeth C. Kent,et al.  Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century , 2003 .

[87]  P. Pearson,et al.  A 23,000-Year Record of Surface Water pH and PCO2 in the Western Equatorial Pacific Ocean , 2003, Science.

[88]  Y. Rosenthal,et al.  The amplitude and phasing of climate change during the last deglaciation in the Sulu Sea, western equatorial Pacific , 2003 .

[89]  D. Lea,et al.  Multispecies approach to reconstructing eastern equatorial Pacific thermocline hydrography during the past 360 kyr , 2003 .

[90]  R. Thunell,et al.  Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation , 2002, Nature.

[91]  R. Thunell,et al.  Using species-specific paleotemperature equations with foraminifera: a case study in the Southern California Bight , 2002 .

[92]  Thomas M. Smith,et al.  An Improved In Situ and Satellite SST Analysis for Climate , 2002 .

[93]  M. Kučera,et al.  Cryptic species of planktonic foraminifera: their effect on palaeoceanographic reconstructions , 2002, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[94]  D. Lea,et al.  Core top calibration of Mg/Ca in tropical foraminifera: Refining paleotemperature estimation , 2002 .

[95]  G. Schmidt,et al.  Global calibration of ecological models for planktic foraminifera from coretop carbonate oxygen-18 , 2002 .

[96]  S. Neuer,et al.  Fluxes of micro-organisms along a productivity gradient in the Canary Islands region (29°N): implications for paleoreconstructions , 2001 .

[97]  H. Elderfield,et al.  Past temperature and δ18O of surface ocean waters inferred from foraminiferal Mg/Ca ratios , 2000, Nature.

[98]  G. Ganssen,et al.  The isotopic signature of planktonic foraminifera from NE Atlantic surface sediments: implications for the reconstruction of past oceanic conditions , 2000, Journal of the Geological Society.

[99]  Francisco Javier Sierro,et al.  Dansgaard‐Oeschger and Heinrich event imprints in Alboran Sea paleotemperatures , 1999 .

[100]  D. Lea,et al.  Glacial–interglacial changes in Subantarctic sea surface temperature and δ18O-water using foraminiferal Mg , 1999 .

[101]  R. Zeebe An explanation of the effect of seawater carbonate concentration on foraminiferal oxygen isotopes , 1999 .

[102]  Jelle Bijma,et al.  Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations , 1998 .

[103]  G. Wefer,et al.  Temperature sensitivity of planktic foraminifera and its influence on the oxygen isotope record , 1998 .

[104]  Jelle Bijma,et al.  Effect of seawater carbonate concentration on foraminiferal carbon and oxygen isotopes , 1997, Nature.

[105]  Sang-Tae Kim,et al.  Equilibrium and nonequilibrium oxygen isotope effects in synthetic carbonates , 1997 .

[106]  K. Kohfeld,et al.  Neogloboquadrina pachyderma (sinistral coiling) as paleoceanographic tracers in polar oceans: Evidence from northeast water polynya plankton tows, sediment traps, and surface sediments , 1996 .

[107]  H. Elderfield,et al.  Variations in Mg/Ca and Sr/Ca ratios of planktonic foraminifera caused by postdepositional dissolution: Evidence of shallow Mg‐dependent dissolution , 1996 .

[108]  D. Lea,et al.  Experimental determination of stable isotope variability in Globigerina bulloides: implications for paleoceanographic reconstructions , 1996 .

[109]  D. Schrag,et al.  Pore Fluid Constraints on the Temperature and Oxygen Isotopic Composition of the Glacial Ocean , 1996, Science.

[110]  C. Pujol,et al.  Distribution patterns of live planktic foraminifers as related to regional hydrography and productive systems of the Mediterranean Sea , 1995 .

[111]  Donald J. DePaolo,et al.  Reconstructing past sea surface temperatures: Correcting for diagenesis of bulk marine carbonate , 1995 .

[112]  J. Zachos,et al.  Evolution of Early Cenozoic marine temperatures , 1994 .

[113]  D. Lea,et al.  Intraspecific stable isotope variability in the planktic foraminiferaGlobigerinoides sacculifer: Results from laboratory experiments , 1993 .

[114]  R. Fairbanks,et al.  Oxygen Isotopic Composition of Multiple Species of Planktonic Foraminifera: Recorders of the Modern Photic Zone Temperature Gradient , 1992 .

[115]  R. Thunell,et al.  Planktonic foraminiferal response to upwelling and seasonal hydrographic conditions; sediment trap results from San Pedro Basin, Southern California Bight , 1991 .

[116]  D. Caron,et al.  Effects of gametogenesis on test structure and dissolution of some spinose planktonic foraminifera and implications for test preservation , 1990 .

[117]  R. Thunell,et al.  Seasonal succession of planktonic foraminifera; results from a four-year time-series sediment trap experiment in the Northeast Pacific , 1989 .

[118]  Christoph Hemleben,et al.  Modern Planktonic Foraminifera , 1988, Springer New York.

[119]  G. Hut Consultants' group meeting on stable isotope reference samples for geochemical and hydrological investigations , 1987 .

[120]  J. Duplessy,et al.  Carbon and oxygen isotopic composition of planktonic foraminifera from laboratory culture, plankton tows and Recent sediment; implications for the reconstruction of paleoclimatic conditions and of the global carbon cycle , 1985 .

[121]  R. Thunell,et al.  Seasonal variation in the flux of planktonic foraminifera: time series sediment trap results from the Panama Basin , 1983 .

[122]  J. Erez,et al.  Experimental paleotemperature equation for planktonic foraminifera , 1983 .

[123]  P. Wiebe,et al.  Vertical distribution and isotopic fractionation of living planktonic foraminifera from the Panama Basin , 1982, Nature.

[124]  P. Blanc,et al.  Oxygen-18 Enrichment of Planktonic Foraminifera Due to Gametogenic Calcification Below the Euphotic Zone , 1981, Science.

[125]  R. Fairbanks,et al.  Seasonal stable isotopic variations in living planktonic foraminifera from bermuda plankton tows , 1981 .

[126]  P. Wiebe,et al.  Foraminifera and Chlorophyll Maximum: Vertical Distribution, Seasonal Succession, and Paleoceanographic Significance , 1980, Science.

[127]  R. Fairbanks,et al.  Seasonal Oxygen Isotopic Variations in Living Planktonic Foraminifera off Bermuda , 1979, Science.

[128]  J. Duplessy,et al.  Differential Isotopic Fractionation in Benthic Foraminifera and Paleotemperatures Reassessed , 1970, Science.

[129]  R. Clayton,et al.  Oxygen isotope fractionation in divalent metal carbonates , 1969 .

[130]  D. Cox,et al.  An Analysis of Transformations , 1964 .

[131]  A. Bé Ecology of Recent planktonic foraminifera--Part 2, Bathymetric and seasonal distributions in the Sargasso Sea off Nermuda , 1960 .

[132]  C. Emiliani,et al.  Pleistocene Temperatures , 1955, The Journal of Geology.

[133]  Samuel Epstein,et al.  REVISED CARBONATE-WATER ISOTOPIC TEMPERATURE SCALE , 1953 .

[134]  P. deMenocal,et al.  Deglacial Indian monsoon failure and North Atlantic stadials linked by Indian Ocean surface cooling , 2016 .

[135]  Y. Rosenthal,et al.  Deglacial δ 18 O and hydrologic variability in the tropical Pacific and , 2014 .

[136]  Stefan Schouten,et al.  Sedimentation and burial of organic and inorganic temperature proxies in the Mozambique Channel, SW Indian Ocean , 2012 .

[137]  Y. Rosenthal,et al.  Holocene evolution of the Indonesian throughflow and the western Pacific warm pool , 2010 .

[138]  Wes McKinney,et al.  Data Structures for Statistical Computing in Python , 2010, SciPy.

[139]  G. Fischer,et al.  The South Atlantic Oxygen Isotope Record of Planktic Foraminifera , 2003 .

[140]  S. Navea,et al.  Fluxes of micro-organisms along a productivity gradient in the Canary Islands region (291N): implications for paleoreconstructions , 2002 .

[141]  F. Gasse Hydrological changes in the African tropics since the Last Glacial Maximum , 2000 .

[142]  D. Lea,et al.  Reassessing foraminiferal stable isotope geochemistry: Impact of the oceanic carbonate system (experimental results) , 1999 .

[143]  A. Bé An ecological, zoogeographic and taxonomic review of recent planktonic foraminifera , 1977 .

[144]  N. Shackleton Attainment of isotopic equilibrium between ocean water and the benthonic foraminifera genus Uvigerina: isotopic changes in the ocean during the last glacial , 1974 .

[145]  H. Urey,et al.  The thermodynamic properties of isotopic substances. , 1947, Journal of the Chemical Society.