![Caroline Lear](https://profiles-cardiff.imgix.net/attachments/1733?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Yr Athro Caroline Lear
(hi/ei)
Deon Ymchwil ac Arloesi, Coleg y Gwyddorau Ffisegol a Pheirianneg
Ysgol Gwyddorau'r Ddaear a'r Amgylchedd
- Sylwebydd y cyfryngau
- Ar gael fel goruchwyliwr ôl-raddedig
Trosolwyg
Deon Ymchwil ac Arloesi ar gyfer Coleg y Gwyddorau Ffisegol a Pheirianneg
Athro Hinsoddau'r gorffennol a Newid System Ddaear
Pencampwr EDI - Llysgennad STEM - Ymgynghorydd Gwyddor Hinsawdd
Fy niddordebau ymchwil yw:
- Hinsoddau'r gorffennol
- Newid System Ddaear
- Dirprwyon geocemegol
- Sefydlogrwydd llenni iâ a newid lefel y môr
- Adborth cylch carbon
- palaeoceanography Cenozoic
Cyhoeddiad
2024
- Procter, F. A., Piazolo, S., John, E. H., Walshaw, R., Pearson, P. N., Lear, C. H. and Aze, T. 2024. Electron backscatter diffraction analysis unveils foraminiferal calcite microstructure and processes of diagenetic alteration. Biogeosciences 21(5), pp. 1213–1233. (10.5194/bg-21-1213-2024)
- Xu, C. et al. 2024. A rapid, simple, and low-blank pumped ion-exchange column chromatography technique for boron purification from carbonate and seawater matrices. Geochemistry, Geophysics, Geosystems 25(2), article number: e2023GC011228. (10.1029/2023gc011228)
- Wunderling, N. et al. 2024. Climate tipping point interactions and cascades: a review. Earth System Dynamics 15(1), pp. 41-74. (10.5194/esd-15-41-2024)
2023
- Hönisch, B. et al. 2023. Toward a Cenozoic history of atmospheric CO2. Science 382(6675), article number: eadi5177. (10.1126/science.adi5177)
- John, E. H., Staudigel, P. T., Buse, B., Lear, C. H., Pearson, P. N. and Slater, S. M. 2023. Revealing their true stripes: Mg/Ca banding in the Paleogene planktonic foraminifera genus Morozovella and implications for paleothermometry. Paleoceanography and Paleoclimatology 38(9), article number: e2023PA004652. (10.1029/2023PA004652)
- Viganò, A., Coxall, H. K., Holmström, M., Vinco, M., Lear, C. H. and Agnini, C. 2023. Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues. Newsletters on Stratigraphy 56(2), pp. 187-223. (10.1127/nos/2022/0725)
2022
- Zammit, R., Lear, C. H., Samankassou, E., Lourens, L. J., Micallef, A., Pearson, P. N. and Bialik, O. M. 2022. Early Miocene intensification of the North African hydrological cycle: multi‐proxy evidence from the shelf carbonates of Malta. Paleoceanography and Paleoclimatology 37(9), article number: e2022PA004414. (10.1029/2022pa004414)
- Pearson, P. N., John, E., Wade, B. S., D'haenens, S. and Lear, C. H. 2022. Spine-like structures in Paleogene muricate planktonic foraminifera. Journal of Micropalaeontology 41(2), pp. 107-127. (10.5194/jm-41-107-2022)
- Staudigel, P. T., John, E. H., Buse, B. and Lear, C. H. 2022. Apparent preservation of primary foraminiferal Mg/Ca ratios and Mg-banding in recrystallized foraminifera. Geology 50(7), pp. 760-764. (10.1130/G49984.1)
2021
- Bradshaw, C. D., Langebroek, P. M., Lear, C. H., Lunt, D. J., Coxall, H. K., Sosdian, S. M. and de Boer, A. M. 2021. Hydrological impact of Middle Miocene Antarctic ice-free areas coupled to deep ocean temperatures. Nature Geoscience 14, pp. 429-436. (10.1038/s41561-021-00745-w)
- Burls, N. J. et al. 2021. Simulating Miocene warmth: insights from an opportunistic multi-model ensemble (MioMIP1). Paleoceanography and Paleoclimatology 36(5), article number: e2020PA004054. (10.1029/2020PA004054)
- Steinthorsdottir, M. et al. 2021. The Miocene: the future of the past. Paleoceanography and Paleoclimatology 36(4), article number: e2020PA004037. (10.1029/2020PA004037)
- Nairn, M. G., Lear, C. H., Sosdian, S. M., Bailey, T. R. and Beavington-Penney, S. 2021. Tropical sea surface temperatures following the middle Miocene climate transition from laser-ablation ICP-MS analysis of glassy foraminifera. Paleoceanography and Paleoclimatology 36(3), article number: e2020PA004165. (10.1029/2020PA004165)
- Hutchinson, D. K. et al. 2021. The Eocene-Oligocene transition: a review of marine and terrestrial proxy data, models and model-data comparisons. Climate of the Past 17(1), pp. 269-315. (10.5194/cp-17-269-2021)
- Lunt, D. J. et al. 2021. DeepMIP: model intercomparison of early eocene climatic optimum (EECO) large-scale climate features and comparison with proxy data. Climate of the Past 17, pp. 203-237. (10.5194/cp-17-203-2021)
2020
- Sosdian, S. M. and Lear, C. H. 2020. Initiation of the western Pacific warm pool at the middle Miocene climate transition?. Paleoceanography and Paleoclimatology 35(12), article number: e2020PA003920. (10.1029/2020PA003920)
- Lear, C. H. et al. 2020. Geological Society of London Scientific Statement: what the geological record tells us about our present and future climate. Journal of the Geological Society 178(1), article number: jgs2020-239. (10.1144/jgs2020-239)
- Modestou, S. E., Leutert, T. J., Fernandez, A., Lear, C. H. and Meckler, A. N. 2020. Warm middle Miocene Indian Ocean bottom water temperatures: comparison of clumped isotope and Mg/Ca based estimates. Paleoceanography and Paleoclimatology 35(11), article number: e2020PA003927. (10.1029/2020PA003927)
- Detlef, H. et al. 2020. Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism. Quaternary Science Reviews 248, article number: 106549. (10.1016/j.quascirev.2020.106549)
- Simon, M. H. et al. 2020. Sequential extraction procedure to obtain the composition of terrigenous detritus in marine sediments. MethodsX 7, article number: 100888. (10.1016/j.mex.2020.100888)
- Simon, M. H. et al. 2020. Development of a protocol to obtain the composition of terrigenous detritus in marine sediments -a pilot study from International Ocean Discovery Program Expedition 361. Chemical Geology 535, article number: 119449. (10.1016/j.chemgeo.2019.119449)
- Sosdian, S. M., Babila, T. L., Greenop, R., Foster, G. L. and Lear, C. H. 2020. Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event. Nature Communications 11, article number: 134. (10.1038/s41467-019-13792-0)
- Detlef, H., Sosdian, S. M., Kender, S., Lear, C. H. and Hall, I. R. 2020. Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343). Geochimica et Cosmochimica Acta 268, pp. 1-21. (10.1016/j.gca.2019.09.025)
- Bowen, G. J., Fisher-Femal, B., Reichart, G., Sluijs, A. and Lear, C. H. 2020. Joint inversion of proxy system models to reconstruct paleoenvironmental time series from heterogeneous data. Climate of the Past 16, pp. 65-78. (10.5194/cp-16-65-2020)
- Edgar, K. M., Bohaty, S. M., Coxall, H. K., Bown, P. R., Batenburg, S. J., Lear, C. H. and Pearson, P. N. 2020. New composite bio- and isotope stratigraphies spanning the Middle Eocene Climatic Optimum at tropical ODP Site 865 in the Pacific Ocean. Journal of Micropalaeontology 39, pp. 117-138. (10.5194/jm-39-117-2020)
2019
- Hollis, C. J. et al. 2019. The DeepMIP contribution to PMIP4: methodologies for selection, compilation and analysis of latest Paleocene and early Eocene climate proxy data, incorporating version 0.1 of the DeepMIP database. Geoscientific Model Development 12(7), pp. 3149-3206. (10.5194/gmd-12-3149-2019)
- Greenop, R., Sosdian, S. M., Henehan, M. J., Wilson, P. A., Lear, C. H. and Foster, G. L. 2019. Orbital forcing, ice-volume and CO2 across the Oligocene-Miocene Transition. Paleoceanography and Paleoclimatology 34(3), pp. 316-328. (10.1029/2018PA003420)
2018
- Sosdian, S. M., Greenop, R., Hain, M. H., Foster, G. L., Pearson, P. N. and Lear, C. H. 2018. Constraining the evolution of Neogene ocean carbonate chemistry using the boron isotope pH proxy. Earth and Planetary Science Letters 498, pp. 362-376. (10.1016/j.epsl.2018.06.017)
- Barrientos, N. et al. 2018. Arctic Ocean benthic foraminifera Mg/Ca ratios and global Mg/Ca-temperature calibrations: New constraints at low temperatures. Geochimica et Cosmochimica Acta 236, pp. 240-259. (10.1016/j.gca.2018.02.036)
- Evans, D., Badger, M., Foster, G., Henehan, M., Lear, C. and Zachos, J. 2018. No substantial long-term bias in the Cenozoic benthic foraminifera oxygen-isotope record. Nature Communications 9, article number: 2875. (10.1038/s41467-018-05303-4)
- Gray, W. R. et al. 2018. Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean. Nature Geoscience 11, pp. 340-344. (10.1038/s41561-018-0108-6)
- Diester-Haass, L., Billups, K. and Lear, C. 2018. Productivity changes across the mid-Pleistocene climate transition. Earth-Science Reviews 179, pp. 372-391. (10.1016/j.earscirev.2018.02.016)
- Coxall, H. K. et al. 2018. Export of nutrient rich Northern Component Water preceded early Oligocene Antarctic glaciation. Nature Geoscience 11, pp. 190-196. (10.1038/s41561-018-0069-9)
- Detlef, H. et al. 2018. Sea ice dynamics across the Mid-Pleistocene transition in the Bering Sea. Nature Communications 9, article number: 941. (10.1038/s41467-018-02845-5)
- Ladant, J., Donnadieu, Y., Bopp, L., Lear, C. and Wilson, P. A. 2018. Meridional contrasts in productivity changes driven by the opening of Drake Passage. Paleoceanography and Paleoclimatology 33(3), pp. 302-317. (10.1002/2017PA003211)
2017
- Hasenfratz, A. et al. 2017. Mg/Ca-temperature calibration for the benthic foraminifera Melonis barleeanum and Melonis pompilioides. Geochimica et Cosmochimica Acta 217, pp. 365-383. (10.1016/j.gca.2017.08.038)
- Greenop, R. et al. 2017. A record of Neogene seawater δ11B reconstructed from paired δ11B analyses on benthic and planktic foraminifera. Climate of the Past 13, pp. 149-170. (10.5194/cp-13-149-2017)
- Lunt, D. J. et al. 2017. The DeepMIP contribution to PMIP4: experimental design for model simulations of the EECO, PETM, and pre-PETM (version 1.0). Geoscientific Model Development 10(2), pp. 889-901. (10.5194/gmd-10-889-2017)
2016
- Lear, C. H., Billups, K., Rickaby, R. E. M., Diester-Haass, L., Mawbey, E. M. and Sosdian, S. M. 2016. Breathing more deeply: Deep ocean carbon storage during the mid-Pleistocene climate transition. Geology 44(12), pp. 1035-1038. (10.1130/G38636.1)
- Lear, C. H. and Lunt, D. 2016. How Antarctica got its ice. Science 352, pp. 34-35. (10.1126/science.aad6284)
2015
- Lear, C. H. et al. 2015. Neogene ice volume and ocean temperatures: Insights from infaunal foraminiferal Mg/Ca paleothermometry. Paleoceanography 30(11), pp. 1437 -1454. (10.1002/2015PA002833)
- Kennedy, A., Farnsworth, A., Lunt, D., Lear, C. H. and Markwick, P. 2015. Atmospheric and oceanic impacts of Antarctic glaciation across the Eocene–Oligocene transition. Philosophical Transactions of the Royal Society A: Mathematical Physical and Engineering Sciences 373(2054), article number: 20140419. (10.1098/rsta.2014.0419)
- Mitchell, N., Simmons, H. and Lear, C. H. 2015. Modern and ancient hiatuses in the pelagic caps of Pacific guyots and seamounts and internal tides. Geosphere 11(5), pp. 1590-1606. (10.1130/GES00999.1)
- Butler, S., Bailey, T., Lear, C. H., Curry, G., Cherns, L. and McDonald, I. 2015. The Mg/Ca–temperature relationship in brachiopod shells: Calibrating a potential palaeoseasonality proxy. Chemical Geology 397, pp. 106-117. (10.1016/j.chemgeo.2015.01.009)
2014
- Greenop, R., Foster, G. L., Wilson, P. A. and Lear, C. H. 2014. Middle Miocene climate instability associated with high-amplitude CO2 variability. Paleoceanography 29(9), pp. 845-853. (10.1002/2014PA002653)
- Mudelsee, M., Bickert, T., Lear, C. H. and lohmann, G. 2014. Cenozoic climate changes: A review based on time series analysis of marine benthic δ18O records. Reviews of Geophysics -Richmond Virginia then Washington- 52(3), pp. 333-374., article number: 2013RG000440. (10.1002/2013RG000440)
2013
- Badger, M. P., Lear, C. H., Pancost, R. D., Foster, G. L., Bailey, T., Leng, M. J. and Abels, H. A. 2013. CO2 drawdown following the middle Miocene expansion of the Antarctic ice sheet. Paleoceanography 28(1), pp. 42-53. (10.1002/palo.20015)
- Mawbey, E. M. and Lear, C. H. 2013. Carbon cycle feedbacks during the Oligocene-Miocene transient glaciation. Geology 41(9), pp. 963-966. (10.1130/G34422.1)
2012
- Sosdian, S., Lear, C. H., Tao, K., Grossman, E., O'Dea, A. and Rosenthal, Y. 2012. Cenozoic seawater Sr/Ca evolution. Geochemistry Geophysics Geosystems 13(10), article number: Q10014. (10.1029/2012GC004240)
- Foster, G. L., Lear, C. H. and Rae, J. W. B. 2012. The evolution of pCO2, ice volume and climate during the middle Miocene. Earth and Planetary Science Letters 341-44, pp. 243-254. (10.1016/j.epsl.2012.06.007)
- Gasson, E., Siddall, M., Lunt, D. J., Rackham, O. J. L., Lear, C. H. and Pollard, D. 2012. Exploring uncertainties in the relationship between temperature, ice volume, and sea level over the past 50 million years. Reviews of Geophysics 50(1), article number: RG1005. (10.1029/2011RG000358)
2010
- Lear, C. H., Mawbey, E. M. and Rosenthal, Y. 2010. Cenozoic benthic foraminiferal Mg/Ca and Li/Ca records: toward unlocking temperatures and saturation states. Paleoceanography 25(4), article number: PA4215. (10.1029/2009PA001880)
2008
- Gentry, D. K., Sosdian, S., Grossman, E. L., Rosenthal, Y., Hicks, D. and Lear, C. H. 2008. Stable isotope and Sr/Ca profiles from the marine gastropod Conus ermineus: testing a multiproxy approach for inferring paleotemperature and paleosalinity. Palaios 23(4), pp. 195-209. (10.2110/palo.2006.p06-112r)
- Lear, C. H., Bailey, T. R., Pearson, P. N., Coxall, H. K. and Rosenthal, Y. 2008. Cooling and ice growth across the Eocene-Oligocene transition. Geology 36(3), pp. 251-254. (10.1130/G24584A.1)
- Burgess, C. E., Pearson, P. N., Lear, C. H., Morgans, H. E. G., Handley, L., Pancost, R. D. and Schouten, S. 2008. Middle Eocene climate cyclicity in the southern Pacific: implications for global ice volume. Geology 36(8), pp. 651-654. (10.1130/G24762A.1)
- Pearson, P. N., McMillan, I. K., Wade, B. S., Jones, T. D., Coxall, H. K., Bown, P. R. and Lear, C. H. 2008. Extinction and environmental change across the Eocene-Oligocene boundary in Tanzania. Geology 36(2), pp. 179-182. (10.1130/G24308A.1)
- Dunkley Jones, T., Bown, P. R., Pearson, P. N., Wade, B. S., Coxall, H. K. and Lear, C. H. 2008. Major shifts in calcareous phytoplankton assemblages through the Eocene-Oligocene transition of Tanzania and their implications for low-latitude primary production. Paleoceanography 23(4), article number: PA4204. (10.1029/2008PA001640)
- DeConto, R. M., Pollard, D., Wilson, P. A., Pälike, H., Lear, C. H. and Pagani, M. 2008. Thresholds for Cenozoic bipolar glaciation. Nature 455(7213), pp. 652-656. (10.1038/nature07337)
2006
- Lear, C. H. and Rosenthal, Y. 2006. Benthic foraminiferal Li/Ca: insights into Cenozoic seawater carbonate saturation state. Geology 34(11), pp. 985-988. (10.1130/G22792A.1)
- Rosenthal, Y., Lear, C. H., Oppo, D. W. and Linsley, B. K. 2006. Temperature and carbonate ion effects on Mg/Ca and Sr/Ca ratios in benthic foraminifera: Aragonitic species Hoeglundina elegans. Paleoceanography 21(1), article number: PA1007. (10.1029/2005PA001158)
- Sosdian, S., Gentry, D. K., Lear, C. H., Grossman, E. L., Hicks, D. and Rosenthal, Y. 2006. Strontium to calcium ratios in the marine gastropod Conus ermineus: Growth rate effects and temperature calibration. Geochemistry Geophysics Geosystems 7(11), article number: Q11023. (10.1029/2005GC001233)
- Andreasen, D. H., Sosdian, S., Perron-Cashman, S., Lear, C. H., deGaridel-Thoron, T., Field, P. and Rosenthal, Y. 2006. Fidelity of radially viewed ICP-OES and magnetic-sector ICP-MS measurement of Mg/Ca and Sr/Ca ratios in marine biogenic carbonates: Are they trustworthy together?. Geochemistry Geophysics Geosystems 7(10), article number: Q10P18. (10.1029/2005GC001124)
- Bailey, T. R. and Lear, C. H. 2006. Testing the effect of carbonate saturation on the Sr/Ca of biogenic aragonite: A case study from the River Ehen, Cumbria, UK. Geochemistry Geophysics Geosystems 7(3), article number: Q03019. (10.1029/2005GC001084)
- Palike, H. et al. 2006. The Heartbeat of the Oligocene Climate System. Science 314(5807), pp. 1894-1898. (10.1126/science.1133822)
2005
- Coxall, H. K., Wilson, P. A., Pälike, H., Lear, C. H. and Backman, J. 2005. Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific. Nature 433(7021), pp. 53-57. (10.1038/nature03135)
2004
- Lear, C. H., Rosenthal, Y., Coxall, H. K. and Wilson, P. A. 2004. Late Eocene to early Miocene ice sheet dynamics and the global carbon cycle. Paleoceanography 19(4), pp. 1-11. (10.1029/2004PA001039)
- 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)
2003
- Lear, C. H., Elderfield, H. and Wilson, P. A. 2003. A Cenozoic seawater Sr/Ca record from benthic foraminiferal calcite and its application in determining global weathering fluxes. Earth and Planetary Science Letters 208(1-2), pp. 69-84. (10.1016/S0012-821X(02)01156-1)
- Lear, C. H., Rosenthal, Y. and Wright, J. D. 2003. The closing of a seaway: ocean water masses and global climate change. Earth and Planetary Science Letters 210(3-4), pp. 425-436. (10.1016/S0012-821X(03)00164-X)
2002
- Lear, C. H., Rosenthal, Y. and Slowey, N. 2002. Benthic foraminiferal Mg/Ca-paleothermometry: a revised core-top calibration. Geochimica Et Cosmochimica Acta 66(19), pp. 3375-3387. (10.1016/S0016-7037(02)00941-9)
2000
- Lear, C. H., Elderfield, H. and Wilson, P. A. 2000. Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite. Science 287(5451), pp. 269-272. (10.1126/science.287.5451.269)
Articles
- Procter, F. A., Piazolo, S., John, E. H., Walshaw, R., Pearson, P. N., Lear, C. H. and Aze, T. 2024. Electron backscatter diffraction analysis unveils foraminiferal calcite microstructure and processes of diagenetic alteration. Biogeosciences 21(5), pp. 1213–1233. (10.5194/bg-21-1213-2024)
- Xu, C. et al. 2024. A rapid, simple, and low-blank pumped ion-exchange column chromatography technique for boron purification from carbonate and seawater matrices. Geochemistry, Geophysics, Geosystems 25(2), article number: e2023GC011228. (10.1029/2023gc011228)
- Wunderling, N. et al. 2024. Climate tipping point interactions and cascades: a review. Earth System Dynamics 15(1), pp. 41-74. (10.5194/esd-15-41-2024)
- Hönisch, B. et al. 2023. Toward a Cenozoic history of atmospheric CO2. Science 382(6675), article number: eadi5177. (10.1126/science.adi5177)
- John, E. H., Staudigel, P. T., Buse, B., Lear, C. H., Pearson, P. N. and Slater, S. M. 2023. Revealing their true stripes: Mg/Ca banding in the Paleogene planktonic foraminifera genus Morozovella and implications for paleothermometry. Paleoceanography and Paleoclimatology 38(9), article number: e2023PA004652. (10.1029/2023PA004652)
- Viganò, A., Coxall, H. K., Holmström, M., Vinco, M., Lear, C. H. and Agnini, C. 2023. Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues. Newsletters on Stratigraphy 56(2), pp. 187-223. (10.1127/nos/2022/0725)
- Zammit, R., Lear, C. H., Samankassou, E., Lourens, L. J., Micallef, A., Pearson, P. N. and Bialik, O. M. 2022. Early Miocene intensification of the North African hydrological cycle: multi‐proxy evidence from the shelf carbonates of Malta. Paleoceanography and Paleoclimatology 37(9), article number: e2022PA004414. (10.1029/2022pa004414)
- Pearson, P. N., John, E., Wade, B. S., D'haenens, S. and Lear, C. H. 2022. Spine-like structures in Paleogene muricate planktonic foraminifera. Journal of Micropalaeontology 41(2), pp. 107-127. (10.5194/jm-41-107-2022)
- Staudigel, P. T., John, E. H., Buse, B. and Lear, C. H. 2022. Apparent preservation of primary foraminiferal Mg/Ca ratios and Mg-banding in recrystallized foraminifera. Geology 50(7), pp. 760-764. (10.1130/G49984.1)
- Bradshaw, C. D., Langebroek, P. M., Lear, C. H., Lunt, D. J., Coxall, H. K., Sosdian, S. M. and de Boer, A. M. 2021. Hydrological impact of Middle Miocene Antarctic ice-free areas coupled to deep ocean temperatures. Nature Geoscience 14, pp. 429-436. (10.1038/s41561-021-00745-w)
- Burls, N. J. et al. 2021. Simulating Miocene warmth: insights from an opportunistic multi-model ensemble (MioMIP1). Paleoceanography and Paleoclimatology 36(5), article number: e2020PA004054. (10.1029/2020PA004054)
- Steinthorsdottir, M. et al. 2021. The Miocene: the future of the past. Paleoceanography and Paleoclimatology 36(4), article number: e2020PA004037. (10.1029/2020PA004037)
- Nairn, M. G., Lear, C. H., Sosdian, S. M., Bailey, T. R. and Beavington-Penney, S. 2021. Tropical sea surface temperatures following the middle Miocene climate transition from laser-ablation ICP-MS analysis of glassy foraminifera. Paleoceanography and Paleoclimatology 36(3), article number: e2020PA004165. (10.1029/2020PA004165)
- Hutchinson, D. K. et al. 2021. The Eocene-Oligocene transition: a review of marine and terrestrial proxy data, models and model-data comparisons. Climate of the Past 17(1), pp. 269-315. (10.5194/cp-17-269-2021)
- Lunt, D. J. et al. 2021. DeepMIP: model intercomparison of early eocene climatic optimum (EECO) large-scale climate features and comparison with proxy data. Climate of the Past 17, pp. 203-237. (10.5194/cp-17-203-2021)
- Sosdian, S. M. and Lear, C. H. 2020. Initiation of the western Pacific warm pool at the middle Miocene climate transition?. Paleoceanography and Paleoclimatology 35(12), article number: e2020PA003920. (10.1029/2020PA003920)
- Lear, C. H. et al. 2020. Geological Society of London Scientific Statement: what the geological record tells us about our present and future climate. Journal of the Geological Society 178(1), article number: jgs2020-239. (10.1144/jgs2020-239)
- Modestou, S. E., Leutert, T. J., Fernandez, A., Lear, C. H. and Meckler, A. N. 2020. Warm middle Miocene Indian Ocean bottom water temperatures: comparison of clumped isotope and Mg/Ca based estimates. Paleoceanography and Paleoclimatology 35(11), article number: e2020PA003927. (10.1029/2020PA003927)
- Detlef, H. et al. 2020. Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism. Quaternary Science Reviews 248, article number: 106549. (10.1016/j.quascirev.2020.106549)
- Simon, M. H. et al. 2020. Sequential extraction procedure to obtain the composition of terrigenous detritus in marine sediments. MethodsX 7, article number: 100888. (10.1016/j.mex.2020.100888)
- Simon, M. H. et al. 2020. Development of a protocol to obtain the composition of terrigenous detritus in marine sediments -a pilot study from International Ocean Discovery Program Expedition 361. Chemical Geology 535, article number: 119449. (10.1016/j.chemgeo.2019.119449)
- Sosdian, S. M., Babila, T. L., Greenop, R., Foster, G. L. and Lear, C. H. 2020. Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event. Nature Communications 11, article number: 134. (10.1038/s41467-019-13792-0)
- Detlef, H., Sosdian, S. M., Kender, S., Lear, C. H. and Hall, I. R. 2020. Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343). Geochimica et Cosmochimica Acta 268, pp. 1-21. (10.1016/j.gca.2019.09.025)
- Bowen, G. J., Fisher-Femal, B., Reichart, G., Sluijs, A. and Lear, C. H. 2020. Joint inversion of proxy system models to reconstruct paleoenvironmental time series from heterogeneous data. Climate of the Past 16, pp. 65-78. (10.5194/cp-16-65-2020)
- Edgar, K. M., Bohaty, S. M., Coxall, H. K., Bown, P. R., Batenburg, S. J., Lear, C. H. and Pearson, P. N. 2020. New composite bio- and isotope stratigraphies spanning the Middle Eocene Climatic Optimum at tropical ODP Site 865 in the Pacific Ocean. Journal of Micropalaeontology 39, pp. 117-138. (10.5194/jm-39-117-2020)
- Hollis, C. J. et al. 2019. The DeepMIP contribution to PMIP4: methodologies for selection, compilation and analysis of latest Paleocene and early Eocene climate proxy data, incorporating version 0.1 of the DeepMIP database. Geoscientific Model Development 12(7), pp. 3149-3206. (10.5194/gmd-12-3149-2019)
- Greenop, R., Sosdian, S. M., Henehan, M. J., Wilson, P. A., Lear, C. H. and Foster, G. L. 2019. Orbital forcing, ice-volume and CO2 across the Oligocene-Miocene Transition. Paleoceanography and Paleoclimatology 34(3), pp. 316-328. (10.1029/2018PA003420)
- Sosdian, S. M., Greenop, R., Hain, M. H., Foster, G. L., Pearson, P. N. and Lear, C. H. 2018. Constraining the evolution of Neogene ocean carbonate chemistry using the boron isotope pH proxy. Earth and Planetary Science Letters 498, pp. 362-376. (10.1016/j.epsl.2018.06.017)
- Barrientos, N. et al. 2018. Arctic Ocean benthic foraminifera Mg/Ca ratios and global Mg/Ca-temperature calibrations: New constraints at low temperatures. Geochimica et Cosmochimica Acta 236, pp. 240-259. (10.1016/j.gca.2018.02.036)
- Evans, D., Badger, M., Foster, G., Henehan, M., Lear, C. and Zachos, J. 2018. No substantial long-term bias in the Cenozoic benthic foraminifera oxygen-isotope record. Nature Communications 9, article number: 2875. (10.1038/s41467-018-05303-4)
- Gray, W. R. et al. 2018. Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean. Nature Geoscience 11, pp. 340-344. (10.1038/s41561-018-0108-6)
- Diester-Haass, L., Billups, K. and Lear, C. 2018. Productivity changes across the mid-Pleistocene climate transition. Earth-Science Reviews 179, pp. 372-391. (10.1016/j.earscirev.2018.02.016)
- Coxall, H. K. et al. 2018. Export of nutrient rich Northern Component Water preceded early Oligocene Antarctic glaciation. Nature Geoscience 11, pp. 190-196. (10.1038/s41561-018-0069-9)
- Detlef, H. et al. 2018. Sea ice dynamics across the Mid-Pleistocene transition in the Bering Sea. Nature Communications 9, article number: 941. (10.1038/s41467-018-02845-5)
- Ladant, J., Donnadieu, Y., Bopp, L., Lear, C. and Wilson, P. A. 2018. Meridional contrasts in productivity changes driven by the opening of Drake Passage. Paleoceanography and Paleoclimatology 33(3), pp. 302-317. (10.1002/2017PA003211)
- Hasenfratz, A. et al. 2017. Mg/Ca-temperature calibration for the benthic foraminifera Melonis barleeanum and Melonis pompilioides. Geochimica et Cosmochimica Acta 217, pp. 365-383. (10.1016/j.gca.2017.08.038)
- Greenop, R. et al. 2017. A record of Neogene seawater δ11B reconstructed from paired δ11B analyses on benthic and planktic foraminifera. Climate of the Past 13, pp. 149-170. (10.5194/cp-13-149-2017)
- Lunt, D. J. et al. 2017. The DeepMIP contribution to PMIP4: experimental design for model simulations of the EECO, PETM, and pre-PETM (version 1.0). Geoscientific Model Development 10(2), pp. 889-901. (10.5194/gmd-10-889-2017)
- Lear, C. H., Billups, K., Rickaby, R. E. M., Diester-Haass, L., Mawbey, E. M. and Sosdian, S. M. 2016. Breathing more deeply: Deep ocean carbon storage during the mid-Pleistocene climate transition. Geology 44(12), pp. 1035-1038. (10.1130/G38636.1)
- Lear, C. H. and Lunt, D. 2016. How Antarctica got its ice. Science 352, pp. 34-35. (10.1126/science.aad6284)
- Lear, C. H. et al. 2015. Neogene ice volume and ocean temperatures: Insights from infaunal foraminiferal Mg/Ca paleothermometry. Paleoceanography 30(11), pp. 1437 -1454. (10.1002/2015PA002833)
- Kennedy, A., Farnsworth, A., Lunt, D., Lear, C. H. and Markwick, P. 2015. Atmospheric and oceanic impacts of Antarctic glaciation across the Eocene–Oligocene transition. Philosophical Transactions of the Royal Society A: Mathematical Physical and Engineering Sciences 373(2054), article number: 20140419. (10.1098/rsta.2014.0419)
- Mitchell, N., Simmons, H. and Lear, C. H. 2015. Modern and ancient hiatuses in the pelagic caps of Pacific guyots and seamounts and internal tides. Geosphere 11(5), pp. 1590-1606. (10.1130/GES00999.1)
- Butler, S., Bailey, T., Lear, C. H., Curry, G., Cherns, L. and McDonald, I. 2015. The Mg/Ca–temperature relationship in brachiopod shells: Calibrating a potential palaeoseasonality proxy. Chemical Geology 397, pp. 106-117. (10.1016/j.chemgeo.2015.01.009)
- Greenop, R., Foster, G. L., Wilson, P. A. and Lear, C. H. 2014. Middle Miocene climate instability associated with high-amplitude CO2 variability. Paleoceanography 29(9), pp. 845-853. (10.1002/2014PA002653)
- Mudelsee, M., Bickert, T., Lear, C. H. and lohmann, G. 2014. Cenozoic climate changes: A review based on time series analysis of marine benthic δ18O records. Reviews of Geophysics -Richmond Virginia then Washington- 52(3), pp. 333-374., article number: 2013RG000440. (10.1002/2013RG000440)
- Badger, M. P., Lear, C. H., Pancost, R. D., Foster, G. L., Bailey, T., Leng, M. J. and Abels, H. A. 2013. CO2 drawdown following the middle Miocene expansion of the Antarctic ice sheet. Paleoceanography 28(1), pp. 42-53. (10.1002/palo.20015)
- Mawbey, E. M. and Lear, C. H. 2013. Carbon cycle feedbacks during the Oligocene-Miocene transient glaciation. Geology 41(9), pp. 963-966. (10.1130/G34422.1)
- Sosdian, S., Lear, C. H., Tao, K., Grossman, E., O'Dea, A. and Rosenthal, Y. 2012. Cenozoic seawater Sr/Ca evolution. Geochemistry Geophysics Geosystems 13(10), article number: Q10014. (10.1029/2012GC004240)
- Foster, G. L., Lear, C. H. and Rae, J. W. B. 2012. The evolution of pCO2, ice volume and climate during the middle Miocene. Earth and Planetary Science Letters 341-44, pp. 243-254. (10.1016/j.epsl.2012.06.007)
- Gasson, E., Siddall, M., Lunt, D. J., Rackham, O. J. L., Lear, C. H. and Pollard, D. 2012. Exploring uncertainties in the relationship between temperature, ice volume, and sea level over the past 50 million years. Reviews of Geophysics 50(1), article number: RG1005. (10.1029/2011RG000358)
- Lear, C. H., Mawbey, E. M. and Rosenthal, Y. 2010. Cenozoic benthic foraminiferal Mg/Ca and Li/Ca records: toward unlocking temperatures and saturation states. Paleoceanography 25(4), article number: PA4215. (10.1029/2009PA001880)
- Gentry, D. K., Sosdian, S., Grossman, E. L., Rosenthal, Y., Hicks, D. and Lear, C. H. 2008. Stable isotope and Sr/Ca profiles from the marine gastropod Conus ermineus: testing a multiproxy approach for inferring paleotemperature and paleosalinity. Palaios 23(4), pp. 195-209. (10.2110/palo.2006.p06-112r)
- Lear, C. H., Bailey, T. R., Pearson, P. N., Coxall, H. K. and Rosenthal, Y. 2008. Cooling and ice growth across the Eocene-Oligocene transition. Geology 36(3), pp. 251-254. (10.1130/G24584A.1)
- Burgess, C. E., Pearson, P. N., Lear, C. H., Morgans, H. E. G., Handley, L., Pancost, R. D. and Schouten, S. 2008. Middle Eocene climate cyclicity in the southern Pacific: implications for global ice volume. Geology 36(8), pp. 651-654. (10.1130/G24762A.1)
- Pearson, P. N., McMillan, I. K., Wade, B. S., Jones, T. D., Coxall, H. K., Bown, P. R. and Lear, C. H. 2008. Extinction and environmental change across the Eocene-Oligocene boundary in Tanzania. Geology 36(2), pp. 179-182. (10.1130/G24308A.1)
- Dunkley Jones, T., Bown, P. R., Pearson, P. N., Wade, B. S., Coxall, H. K. and Lear, C. H. 2008. Major shifts in calcareous phytoplankton assemblages through the Eocene-Oligocene transition of Tanzania and their implications for low-latitude primary production. Paleoceanography 23(4), article number: PA4204. (10.1029/2008PA001640)
- DeConto, R. M., Pollard, D., Wilson, P. A., Pälike, H., Lear, C. H. and Pagani, M. 2008. Thresholds for Cenozoic bipolar glaciation. Nature 455(7213), pp. 652-656. (10.1038/nature07337)
- Lear, C. H. and Rosenthal, Y. 2006. Benthic foraminiferal Li/Ca: insights into Cenozoic seawater carbonate saturation state. Geology 34(11), pp. 985-988. (10.1130/G22792A.1)
- Rosenthal, Y., Lear, C. H., Oppo, D. W. and Linsley, B. K. 2006. Temperature and carbonate ion effects on Mg/Ca and Sr/Ca ratios in benthic foraminifera: Aragonitic species Hoeglundina elegans. Paleoceanography 21(1), article number: PA1007. (10.1029/2005PA001158)
- Sosdian, S., Gentry, D. K., Lear, C. H., Grossman, E. L., Hicks, D. and Rosenthal, Y. 2006. Strontium to calcium ratios in the marine gastropod Conus ermineus: Growth rate effects and temperature calibration. Geochemistry Geophysics Geosystems 7(11), article number: Q11023. (10.1029/2005GC001233)
- Andreasen, D. H., Sosdian, S., Perron-Cashman, S., Lear, C. H., deGaridel-Thoron, T., Field, P. and Rosenthal, Y. 2006. Fidelity of radially viewed ICP-OES and magnetic-sector ICP-MS measurement of Mg/Ca and Sr/Ca ratios in marine biogenic carbonates: Are they trustworthy together?. Geochemistry Geophysics Geosystems 7(10), article number: Q10P18. (10.1029/2005GC001124)
- Bailey, T. R. and Lear, C. H. 2006. Testing the effect of carbonate saturation on the Sr/Ca of biogenic aragonite: A case study from the River Ehen, Cumbria, UK. Geochemistry Geophysics Geosystems 7(3), article number: Q03019. (10.1029/2005GC001084)
- Palike, H. et al. 2006. The Heartbeat of the Oligocene Climate System. Science 314(5807), pp. 1894-1898. (10.1126/science.1133822)
- Coxall, H. K., Wilson, P. A., Pälike, H., Lear, C. H. and Backman, J. 2005. Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific. Nature 433(7021), pp. 53-57. (10.1038/nature03135)
- Lear, C. H., Rosenthal, Y., Coxall, H. K. and Wilson, P. A. 2004. Late Eocene to early Miocene ice sheet dynamics and the global carbon cycle. Paleoceanography 19(4), pp. 1-11. (10.1029/2004PA001039)
- 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)
- Lear, C. H., Elderfield, H. and Wilson, P. A. 2003. A Cenozoic seawater Sr/Ca record from benthic foraminiferal calcite and its application in determining global weathering fluxes. Earth and Planetary Science Letters 208(1-2), pp. 69-84. (10.1016/S0012-821X(02)01156-1)
- Lear, C. H., Rosenthal, Y. and Wright, J. D. 2003. The closing of a seaway: ocean water masses and global climate change. Earth and Planetary Science Letters 210(3-4), pp. 425-436. (10.1016/S0012-821X(03)00164-X)
- Lear, C. H., Rosenthal, Y. and Slowey, N. 2002. Benthic foraminiferal Mg/Ca-paleothermometry: a revised core-top calibration. Geochimica Et Cosmochimica Acta 66(19), pp. 3375-3387. (10.1016/S0016-7037(02)00941-9)
- Lear, C. H., Elderfield, H. and Wilson, P. A. 2000. Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite. Science 287(5451), pp. 269-272. (10.1126/science.287.5451.269)
Ymchwil
I use the geochemistry of carbonate fossils as a window to past climatic change. For example, I use the Mg/Ca ratio of microscopic oceanic fossils called foraminifera to reconstruct past ocean temperatures, and their boron isotope ratios to reconstruct past changes in the carbon cycle and pCO2
. Most of these fossil samples have been drilled from deep-sea sediments by the International Ocean Discovery Program, and I have participated in several ocean coring expeditions. The overarching aim of my research is to constrain the long-term sensitivity of continental ice sheets to changing environmental conditions, including CO2.
International Ocean Discovery Program - http://www.iodp.org/
PALSEA2 - http://people.oregonstate.edu/~carlsand/PALSEA2/Home.htmlScience, Technology, Engineering and Mathematics network -
http://www.stemnet.org.uk/Addysgu
Blwyddyn 1:
Rwy'n cyfrannu at fodiwl Byd Amgylcheddau Dynamig, sy'n defnyddio astudiaethau achos i ymchwilio i Brosesau Arwyneb y Ddaear
Rwy'n cyfrannu at y modiwl Deunyddiau Daear, gan ddysgu myfyrwyr sut i ddisgrifio a nodi creigiau gwaddodol mewn sbesimen llaw ac adran denau, a deall eu proses ffurfio.
Rwy'n arwain cwrs maes preswyl Sir Benfro, gan ddysgu amrywiaeth o sgiliau maes daearegol i fyfyrwyr.
Rwy'n cyfrannu at sawl cwrs maes dydd (e.e., Arfordir Treftadaeth Morgannwg, Barry Isalnd, Comin Rudry)
Blwyddyn 3:
Rwy'n arwain y modiwl a arweinir gan ymchwil Past Climates: Science into Society
Rwy'n goruchwylio Traethodau Estynedig Daeareg.
Blwyddyn 4:
Rwy'n goruchwylio Prosiectau Traethawd Hir Ymchwil MSci.
Bywgraffiad
- Deon Ymchwil ac Arloesi, Coleg y Gwyddorau Ffisegol a Pheirianneg (2024-2027)
- Cyfarwyddwr Ymchwil, Ysgol Gwyddorau'r Ddaear a'r Amgylchedd (2022-2024)
- Pennaeth y Ganolfan Cydnerthedd a Newid Amgylcheddol (2015-2021)
- Aelod o REF2021 Is-banel 7
- Sylfaenydd a Chyd-gadeirydd Cymdeithas Paleoclimate y DU (2017-2023)
- Athro Gwyddorau Daear, Ysgol Gwyddorau'r Ddaear a'r Amgylchedd, Prifysgol Caerdydd (2016-presennol)
- Darllenydd mewn Gwyddorau Daear, Ysgol Gwyddorau'r Ddaear a'r Amgylchedd, Prifysgol Caerdydd (2013 – 2016)
- Uwch Ddarlithydd mewn Gwyddorau Daear, Ysgol Gwyddorau'r Ddaear a'r Amgylchedd, Prifysgol Caerdydd (2009-2013)
- Darlithydd mewn Gwyddorau Daear, Ysgol Gwyddorau'r Ddaear a'r Amgylchedd, Prifysgol Caerdydd (2004-2009)
- Cydymaith Ymchwil Ôl-ddoethurol, Sefydliad y Gwyddorau Môr ac Arfordirol, Prifysgol Rutgers, NJ, UDA (2001-2004)
- PhD – Gwyddorau Daear, Prifysgol Caergrawnt, DU (2000)
- BA (dosbarth cyntaf Anrh) Gwyddorau Daear, Prifysgol Rhydychen, DU (1997)
Anrhydeddau a dyfarniadau
Medal Bigsby, Cymdeithas Ddaearegol Llundain (2017)
Gwobr Philip Leverhulme (2005)
Ysgoloriaeth Bateman (Coleg Gonville a Caius, Prifysgol Caergrawnt)
Gwobr Daeareg ac Ysgolheictod (Prifysgol Rhydychen) (1994-1997)
Aelodaethau proffesiynol
Cymdeithas Paleohinsawdd y DU
Meysydd goruchwyliaeth
Paleoclimate a Paleoceanography
Dirprwyon geocemegol
Goruchwyliaeth gyfredol
Ouyang Ouyang
Myfyriwr ymchwil
Ardrawiad
Rwyf wedi ymrwymo i gefnogi EDI yn y byd academaidd, ac fel rhan o hyn, rwyf hefyd yn cymryd rhan weithredol mewn gweithgareddau allgymorth ac ymgysylltu. Dyma rai enghreifftiau yn y meysydd hyn:
-
Aelod o Banel Athena Swan yr Ysgol, yn cynhyrchu cais llwyddiannus am wobr Efydd (2016)
-
Aelod o Bwyllgor EDI Ysgol
-
Arweinwyr yr Ysgol URGE Pod (Hiliaeth Dysgu mewn Geowyddoniaeth) (2021):
https://urgeoscience.org/pods/cardiff-earth-and-environmental-sciences/
- 2021 ymlaen: Cydweithrediad newydd gyda phrosiect Porth Cymunedol Grangetown. Mae digwyddiadau penodol yn cynnwys stondin ym marchnad Grangetown, am hanes Grangetown a Daeareg, a gweithgareddau gyda Fforwm Ieuenctid Grangetown.
2021: Prif siaradwr yng Ngŵyl Wyddoniaeth BGS BUFI, gyda ffocws ar EDI mewn Geowyddorau
2020: Darlith Daniell, Coleg y Brenin Llundain https://www.kcl.ac.uk/news/daniell-lecture-goes-online-for-2020
2020 Wedi'i chynnwys yn AL LARGO gan Anna Marziano, enillodd y ffilm hon wobr arbennig y rheithgor yn adran ddogfen Gŵyl Ffilm Torino
Gweithdy Ysgolion Newid Hinsawdd 2019 gyda First Campus ac Amgueddfa Genedlaethol Cymru
2019 Tair darlith gyhoeddus a gynhaliwyd gan Gymdeithas Ddaearegol Llundain
Darlith Gyhoeddus 2018 a gynhaliwyd gan CoPSE, Prifysgol Caerdydd
2016-18 Digwyddiadau Ysgol Gynradd Dan Arweiniad yn ystod NSEW
2017-18 Sgyrsiau gyda Chymdeithas Daearegwyr a Grŵp Daeareg Rhydychen
Cyfweliad gwyddoniaeth hinsawdd BBC Radio Wales 2017
2017 Llefarydd ym Mheint Gwyddoniaeth Caerdydd (pintofscience.co.uk)
2016 Cyfrannwr at raglen Today BBC Radio 4
Cyfrannwr Rhaglen Bore Da BBC Radio Wales 2016
Gweithdai Pobl fel Fi 2016: St Teilo's ac Ysgolion Uwchradd Caerdydd, Caerdydd
2016 Llefarydd Cymdeithas Wyddonol Caerdydd
2015 Llefarydd Gŵyl Lenyddol y Gelli
2015 Siaradwr yn Digwyddiad Gwyddoniaeth Soapbox, Abertawe (soapboxscience.org)
2013 Guest ar "Yn Ein Amser" gyda Melvyn Bragg
2013 Darlithoedd i 300 o fyfyrwyr TGAU a 150 Lefel A, Sir Benfro
Darlith Gyhoeddus 2013 yng Nghyfres Darlithoedd 'Dangerous Earth', Prifysgol Caerdydd
Digwyddiad cyfathrebu Gwyddoniaeth-Celf 2012 yng Nghanolfan Celfyddydau Chapter (BSA)
2010 Ymgynghorydd ar gyfer arddangosfa "Awyrgylch", Amgueddfa Wyddoniaeth, Llundain
2008 Cyfweliad BBC Radio Wales ac erthyglau papur newydd ar ymchwil
2007-8 Arddangosfa Archwilio Ein Byd Ymchwil yn Amgueddfa Cymru
2007 The Floating Classroom in Cardiff Bay: funded by RCUK.
Themâu ymchwil
Arbenigeddau
- Palaeoclimatoleg
- Newid hinsawdd
