Professor Stephen Barker

2021

• Doughty, A. M.et al. 2021. A maximum in global glacier extent during MIS 4. Quaternary Science Reviews 261, article number: 106948. (10.1016/j.quascirev.2021.106948)
• Barker, S.et al. 2021. Strengthening Atlantic inflow across the mid-pleistocene transition. Paleoceanography and Paleoclimatology 36(4), article number: e2020PA004200. (10.1029/2020PA004200)
• Barker, S. and Knorr, G. 2021. Millennial scale feedbacks determine the shape and rapidity of glacial termination. Nature Communications 12, article number: 2273. (10.1038/s41467-021-22388-6)
• Starr, A.et al. 2021. Antarctic icebergs reorganise ocean circulation during pleistocene glacials. Nature 589, pp. 236-241. (10.1038/s41586-020-03094-7)

2020

• Simon, M. H.et al. 2020. A late Pleistocene dataset of Agulhas Current variability. Scientific Data 7(1), article number: 385. (10.1038/s41597-020-00689-7)
• Just, J.et al. 2020. Data report: evaluation of shipboard magnetostratigraphy by alternating field demagnetization of discrete samples, Expedition 361, Site U1475. Proceedings of the International Ocean Discovery Program 361 (10.14379/iodp.proc.361.202.2020)
• Babin, D. P.et al. 2020. Data report: X-ray fluorescence core scanning of IODP Site U1474 sediments, Natal Valley, southwest Indian Ocean, Expedition 361. 361 (10.14379/iodp.proc.361.201.2020)

2019

• Barker, S.et al. 2019. Early interglacial legacy of deglacial climate instability. Paleoceanography and Paleoclimatology 34(8), pp. 1455-1475. (10.1029/2019PA003661)
• Wilson, J. D.et al. 2019. Sensitivity of atmospheric CO2 to regional variability in particulate organic matter remineralization depths. Biogeosciences 16(14), pp. 2923-2936. (10.5194/bg-16-2923-2019)
• Menking, J. A.et al. 2019. Spatial pattern of accumulation at Taylor Dome during the last glacial inception: stratigraphic constraints from Taylor Glacier. Climate of the Past Discussions 15, pp. 1537-1556. (10.5194/cp-2018-53)
• Menking, J. A.et al. 2019. Spatial pattern of accumulation at Taylor Dome during Marine Isotope Stage 4: stratigraphic constraints from Taylor Glacier. Climate of the Past 15(4), pp. 1537-1556. (10.5194/cp-15-1537-2019)
• Wilson, J. D.et al. 2019. Sensitivity of atmospheric CO2 to regional variability in particulate organic matter re-mineralization depths. Biogeosciences Discussions 16, pp. 2923-2936. (10.5194/bg-16-2923-2019)
• Barker, S. 2019. A tribute to Wally Broecker. Eos, Transactions American Geophysical Union 100 (10.1029/2019EO121001)

2018

• Boscolo-Galazzo, F.et al. 2018. Temperature dependency of metabolic rates in the upper ocean: A positive feedback to global climate change?. Global and Planetary Change 170, pp. 201-212. (10.1016/j.gloplacha.2018.08.017)
• Tangunan, D. N.et al. 2018. The last 1 million years of the extinct genus Discoaster: Plio–Pleistocene environment and productivity at Site U1476 (Mozambique Channel). Palaeogeography, Palaeoclimatology, Palaeoecology 505, pp. 187-197. (10.1016/j.palaeo.2018.05.043)
• Hodell, D.et al. 2018. Chemistry of oceans past and present: a special issue in tribute to Harry Elderfield, FRS (1943-2016). Geochimica et Cosmochimica Acta 236, pp. 1-4. (10.1016/j.gca.2018.06.001)
• Köhler, P.et al. 2018. The effect of obliquity-driven changes on paleoclimate sensitivity during the late Pleistocene. Geophysical Research Letters 45(13), pp. 6661-6671. (10.1029/2018GL077717)
• Pedro, J. B.et al. 2018. Beyond the bipolar seesaw: toward a process understanding of interhemispheric coupling. Quaternary Science Reviews 192, pp. 27-46. (10.1016/j.quascirev.2018.05.005)

2017

• Hasenclever, J.et al. 2017. Sea level fall during glaciation stabilized atmospheric CO2 by enhanced volcanic degassing. Nature Communications 8, article number: 15867. (10.1038/ncomms15867)
• Zhang, X.et al. 2017. Abrupt North Atlantic circulation changes in response to gradual CO2 forcing in a glacial climate state. Nature Geoscience 10, pp. 518-523. (10.1038/ngeo2974)
• Deaney, E. L., Barker, S. and Van de Flierdt, T. 2017. Timing and nature of AMOC recovery across Termination 2 and magnitude of deglacial CO2 change. Nature Communications 8, article number: 14595. (10.1038/NCOMMS14595)

2016

• Barker, S. and Knorr, G. 2016. A paleo-perspective on the AMOC as a tipping element. PAGES Magazine 24(1), pp. 14-15.
• Diz, P. and Barker, S. 2016. Approaches and constraints to the reconstruction of palaeoproductivity from Cape Basin abyssal benthic foraminifera (South Atlantic). Journal of Micropalaeontology 35, pp. 195-204. (10.1144/jmpaleo2015-045)
• Yu, J.et al. 2016. Sequestration of carbon in the deep Atlantic during the last glaciation. Nature Geoscience 9(4), pp. 319-324. (10.1038/ngeo2657)
• Hoogakker, B. A. A., Thornalley, D. J. R. and Barker, S. 2016. Millennial changes in North Atlantic oxygen concentrations. Biogeosciences 13(1), pp. 211-221. (10.5194/bg-13-211-2016)
• Hoogakker, B. A. A., Thornalley, D. J. R. and Barker, S. 2016. Millennial changes in North Atlantic oxygen concentrations. Biogeosciences Discussions 12(15), pp. 12947-12973. (10.5194/bgd-12-12947-2015)
• Barker, S. 2016. Dissolution of deep-sea carbonates. In: Elias, S. A. ed. Reference Module in Earth Systems and Environmental Sciences. Elsevier, (10.1016/B978-0-12-409548-9.09717-7)

2015

• Simon, M. H.et al. 2015. Eastern South African hydroclimate over the past 270,000 years. Scientific Reports 5, pp. 18153. (10.1038/srep18153)
• Jonkers, L.et al. 2015. Correcting for the influence of ice-rafted detritus on grain size-based paleocurrent speed estimates. Paleoceanography 30(10), pp. 1347-1357. (10.1002/2015PA002830)
• Simon, M. H.et al. 2015. Salt exchange in the Indian-Atlantic Ocean Gateway since the LGM: A compensating effect between Agulhas Current changes and salinity variations?. Paleoceanography 30(10) (10.1002/2015PA002842)
• Wilson, J. D., Ridgwell, A. and Barker, S. 2015. Can organic matter flux profiles be diagnosed using remineralisation rates derived from observed tracers and modelled ocean transport rates?. Biogeosciences Discussions 12(6), pp. 4557-4593. (10.5194/bgd-12-4557-2015)
• Wilson, J. D., Ridgwell, A. and Barker, S. 2015. Can organic matter flux profiles be diagnosed using remineralisation rates derived from observed tracers and modelled ocean transport rates?. Biogeosciences 12(18), pp. 5547-5562. (10.5194/bg-12-5547-2015)
• Moffa-Sanchez, P.et al. 2015. Changes in the strength of the Nordic Seas Overflows over the past 3000 years. Quaternary Science Reviews 123, pp. 134-143. (10.1016/j.quascirev.2015.06.007)
• Thornalley, D. J. R.et al. 2015. A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period. Science 349(6249), pp. 706-710. (10.1126/science.aaa9554)
• Diz, P. and Barker, S. 2015. Linkages between rapid climate variability and deep-sea benthic foraminifera in the deep Subantarctic South Atlantic during the last 95 kyr. Paleoceanography 30(6), pp. 601-611. (10.1002/2015PA002784)
• Barker, S.et al. 2015. Icebergs not the trigger for North Atlantic cold events. Nature 520(7547), pp. 333-336. (10.1038/nature14330)
• Schaefer, J. M.et al. 2015. The Southern Glacial Maximum 65,000 years ago and its unfinished termination. Quaternary Science Reviews 114, pp. 52-60. (10.1016/j.quascirev.2015.02.009)

2014

• Anderson, R. F.et al. 2014. Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372(2019), article number: 20130054. (10.1098/rsta.2013.0054)
• Barker, S. and Diz, P. 2014. Timing of the descent into the last ice age determined by the bipolar seesaw. Paleoceanography 29(6), pp. 489-507. (10.1002/2014PA002623)
• Moffa Sanchez, P.et al. 2014. Solar forcing of North Atlantic surface temperature and salinity over the past millennium. Nature Geoscience 7, pp. 275-278. (10.1038/ngeo2094)
• Moffa Sanchez, P.et al. 2014. Surface changes in the Eastern Labrador Sea around the onset of the Little Ice Age. Paleoceanography and Paleoclimatology 29(3), pp. 160-175. (10.1002/2013PA002523)

2013

• Simon, M. H.et al. 2013. Millennial-scale Agulhas Current variability and its implications for salt-leakage through the Indian-Atlantic Ocean gateway. Earth and Planetary Science Letters 383, pp. 101-112. (10.1016/j.epsl.2013.09.035)
• Skinner, L. C.et al. 2013. North Atlantic versus Southern Ocean contributions to a deglacial surge in deep ocean ventilation. Geology 41(6), pp. 667-670. (10.1130/G34133.1)
• Thornalley, D. J. R.et al. 2013. Abrupt changes in deep Atlantic circulation during the transition to full glacial conditions. Paleoceanography 28(2), pp. 253-262. (10.1002/palo.20025)
• Griffiths, J. D.et al. 2013. Evidence of silicic acid leakage to the tropical Atlantic via Antarctic intermediate water during marine isotope stage 4. Paleoceanography 28(2), pp. 307-318. (10.1002/palo.20030)
• Ziegler, M.et al. 2013. Development of Middle Stone Age innovation linked to rapid climate change. Nature Communications 4, article number: 1905. (10.1038/ncomms2897)

2012

• Sexton, P. F. and Barker, S. 2012. Onset of 'Pacific-style' deep-sea sedimentary carbonate cycles at the mid-Pleistocene transition. Earth and Planetary Science Letters 321-22, pp. 81-94. (10.1016/j.epsl.2011.12.043)
• Honisch, B.et al. 2012. The Geological Record of Ocean Acidification. Science 335(6072), pp. 1058-1063. (10.1126/science.1208277)
• Parrenin, F.et al. 2012. On the gas-ice depth difference (Δdepth) along the EPICA Dome C ice core. Climate of the Past Discussions 8(2), pp. 1089-1131. (10.5194/cpd-8-1089-2012)
• Barker, S. and Ridgwell, A. 2012. Ocean Acidification. Nature Education Knowledge 3(10), article number: 21.
• Wilson, J. D., Barker, S. and Ridgwell, A. 2012. Assessment of the spatial variability in particulate organic matter and mineral sinking fluxes in the ocean interior: Implications for the ballast hypothesis. Global Biogeochemical Cycles 26(4), article number: GB4011. (10.1029/2012GB004398)
• Parrenin, F.et al. 2012. On the gas-ice depth difference (Δdepth) along the EPICA Dome C ice core. Climate of the Past 8(4), pp. 1239-1255. (10.5194/cp-8-1239-2012)

2011

• Barker, S.et al. 2011. 800,000 years of abrupt climate variability. Science 334(6054), pp. 347-351. (10.1126/science.1203580)
• Thornalley, D. J. R.et al. 2011. The deglacial evolution of North Atlantic deep convection. Science 331(6014), pp. 202-205. (10.1126/science.1196812)

2010

• Barker, S.et al. 2010. Extreme deepening of the Atlantic overturning circulation during deglaciation. Nature Geoscience 3(8), pp. 567-571. (10.1038/NGEO921)
• Skinner, L. C.et al. 2010. Ventilation of the deep Southern Ocean and deglacial CO2 rise. Science 328(5982), pp. 1147-1151. (10.1126/science.1183627)
• Elderfield, H.et al. 2010. A record of bottom water temperature and seawater δ18O for the Southern Ocean over the past 440 kyr based on Mg/Ca of benthic foraminiferal Uvigerina spp. Quaternary Science Reviews 29(1-2), pp. 160-169. (10.1016/j.quascirev.2009.07.013)
• Hall, I. R.et al. 2010. Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years. Paleoceanography 25(2), article number: PA2101. (10.1029/2009PA001886)
• Johnstone, H. J. H.et al. 2010. Inside story: An X-ray computed tomography method for assessing dissolution in the tests of planktonic foraminifera. Marine Micropaleontology 77(1-2), pp. 58-70. (10.1016/j.marmicro.2010.07.004)

2009

• Barker, S.et al. 2009. Enhanced Atlantic Merdional Overturning Circulation during pronounced interstadials. Geochimica Et Cosmochimica Acta 73(13s), pp. A90-A90. (10.1016/j.gca.2009.05.002)
• Barker, S.et al. 2009. Interhemispheric Atlantic seesaw response during the last deglaciation. Nature 457(7233), pp. 1097-1102. (10.1038/nature07770)
• Waelbroeck, C.et al. 2009. Constraints on the magnitude and patterns of ocean cooling at the Last Glacial Maximum. Nature Geoscience 2(2), pp. 127-132. (10.1038/ngeo411)

2008

• Broecker, W., Clark, E. and Barker, S. 2008. Near constancy of the Pacific Ocean surface to mid-depth radiocarbon-age difference over the last 20 kyr. Earth and Planetary Science Letters 274(3-4), pp. 322-326. (10.1016/j.epsl.2008.07.035)
• Barker, S., Broecker, W. S. and Clark, E. 2008. A search for the glacial age C-14 depleted ocean reservoir. Geochimica Et Cosmochimica Acta 72(12s), pp. A55-A55. (10.1016/j.gca.2008.05.005)

2007

• Barker, S. and Knorr, G. 2007. Antarctic climate signature in the Greenland ice core record. Proceedings of the National Academy of Sciences 104(44), pp. 17278-17282. (10.1073/pnas.0708494104)
• Broecker, W.et al. 2007. Radiocarbon age of late glacial deep water from the equatorial Pacific. Paleoceanography 22(2), article number: PA2206. (10.1029/2006PA001359)
• Barker, S.et al. 2007. Radiocarbon age offsets of foraminifera resulting from differential dissolution and fragmentation within the sedimentary bioturbated zone. Paleoceanography 22(2), article number: PA2205. (10.1029/2006PA001354)
• Broecker, W. S. and Barker, S. 2007. Reply to comment by L. D. Stott on "Anomalous radiocarbon ages for foraminifera shells": A correction to the western tropical Pacific MD9821-81 record. Paleoceanography 22(1), article number: PA1212. (10.1029/2006PA001393)
• Rickaby, R. E. M.et al. 2007. Coccolith chemistry reveals secular variations in the global ocean carbon cycle?. Earth and Planetary Science Letters 253(1-2), pp. 83-95. (10.1016/j.epsl.2006.10.016)
• Broecker, W. and Barker, S. 2007. A 190‰ drop in atmosphere's Δ14C during the “Mystery Interval” (17.5 to 14.5 kyr). Earth and Planetary Science Letters 256(1-2), pp. 90-99. (10.1016/j.epsl.2007.01.015)
• Schiebel, R.et al. 2007. Planktic foraminiferal dissolution in the twilight zone. Deep-Sea Research. Part II.Topical studies in oceanography 54(5-7), pp. 676-686. (10.1016/j.dsr2.2007.01.009)

2006

• Barker, S.et al. 2006. Globally increased pelagic carbonate production during the Mid-Brunhes dissolution interval and the CO2 paradox of MIS 11. Quaternary Science Reviews 25(23-24), pp. 3278-3293. (10.1016/j.quascirev.2006.07.018)
• Broecker, W.et al. 2006. Anomalous radiocarbon ages for foraminifera shells. Paleoceanography 21, article number: PA2008. (10.1029/2005PA001212)

2005

• Barker, S. 2005. The ‘flickering switch’ of late Pleistocene climate change revisited. Geophysical Research Letters 32(24), article number: L24703. (10.1029/2005GL024486)
• Barker, S.et al. 2005. Planktonic foraminiferal Mg/Ca as a proxy for past oceanic temperatures: a methodological overview and data compilation for the Last Glacial Maximum. Quaternary Science Reviews 24(7-9), pp. 821-834. (10.1016/j.quascirev.2004.07.016)
• Greaves, M.et al. 2005. Accuracy, standardization, and interlaboratory calibration standards for foraminiferal Mg/Ca thermometry. Geochemistry Geophysics Geosystems 6(2), article number: Q02D13. (10.1029/2004GC000790)

2004

• Broecker, W.et al. 2004. Ventilation of the Glacial deep Pacific Ocean. Science 306(5699), pp. 1169-1172. (10.1126/science.1102293)
• Rosenthal, Y.et al. 2004. Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research. Geochemistry Geophysics Geosystems 5(4), article number: Q04D09. (10.1029/2003GC000650)
• Barker, S., Kiefer, T. and Elderfield, H. 2004. Temporal changes in North Atlantic circulation constrained by planktonic foraminiferal shell weights. Paleoceanography 19(3), article number: PA3008. (10.1029/2004PA001004)

2003

• Barker, S., Greaves, M. and Elderfield, H. 2003. A study of cleaning procedures used for foraminiferal Mg/Ca paleothermometry. Geochemistry Geophysics Geosystems 4(9), pp. 1-20. (10.1029/2003GC000559)
• Barker, S., Higgins, J. A. and Elderfield, H. 2003. The future of the carbon cycle: review, calcification response, ballast and feedback on atmospheric CO2. Philosophical Transactions of the Royal Society of London Series A: Mathematical and Physical Sciences 361(1810), pp. 1977-1999. (10.1098/rsta.2003.1238)

2002

• Barker, S. and Elderfield, H. 2002. Foraminiferal calcification response to glacial-interglacial changes in atmospheric CO2. Science 297(5582), pp. 833-836. (10.1126/science.1072815)