Are there pre-Quaternary geological analogues for a future greenhouse warming?

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Volumn 369, Issue 1938, 2011, Pages 933-956

  Haywood, Alan M ^a   Ridgwell, Andy ^b   Lunt, Daniel J ^b   Hill, Daniel J ^c   Pound, Matthew J ^a   Dowsett, Harry J ^d   Dolan, Aisling M ^a   Francis, Jane E ^a   Williams, Mark ^c,e  

^a UNIVERSITY OF LEEDS   (United Kingdom)

^b UNIVERSITY OF BRISTOL   (United Kingdom)

^c BRITISH GEOLOGICAL SURVEY   (United Kingdom)

^d U S GEOLOGICAL SURVEY   (United States)

^e UNIVERSITY OF LEICESTER   (United Kingdom)

Author keywords

Analogue; Climate models; Climate sensitivity; Earth system sensitivity; Palaeoclimate; Proxies

Indexed keywords

CLIMATOLOGY; EARTH (PLANET); GLOBAL WARMING; GREENHOUSE GASES;

ANALOGUE; CLIMATE SENSITIVITY; EARTH SYSTEM SENSITIVITY; PALAEOCLIMATE; PROXIES;

CLIMATE MODELS;

EID: 79952346796     PISSN: 1364503X     EISSN: None     Source Type: Journal    
DOI: 10.1098/rsta.2010.0317     Document Type: Article

References (125)

1. Lyell, C. 1830 Principles of geology, vol. 1. London, UK: John Murray.
2. Haywood, A. M., Dowsett, H. J., Valdes, P. J., Lunt, D. J., Francis, J. E. & Sellwood, B. W. 2009 Introduction. Pliocene climate, processes and problems. Phil. Trans. R. Soc. A 367, 3-17. (doi:10.1098/rsta.2008.0205)
3. Siegenthaler, U. et al. 2005 Stable carbon cycle-climate relationship during the Late Pleistocene. Science 310, 1313-1317. (doi:10.1126/science. 1120130) (Pubitemid 41698860)
4. Lüthi, D. et al. 2008 High-resolution carbon dioxide concentration record 650 000-800 000 years before present. Nature 453, 379-382. (doi:10.1038/nature06949) (Pubitemid 351693131)
5. Loulergue, L. et al. 2008 Orbital and millennial-scale features of atmospheric CH4 over the past 800 000 years. Nature 453, 383-386. (doi:10.1038/nature06950) (Pubitemid 351693132)
6. Kürschner, W. M., Kvaček, Z. & Dilcher, D. L. 2008 The impact of Miocene atmospheric carbon dioxide fluctuations on climate and the evolution of terrestrial ecosystems. Proc. Natl Acad. Sci. USA 105, 449-453. (doi:10.1073/pnas.0708588105) (Pubitemid 351171728)
7. Pagani, M., Liu, Z., LaRiviere, J. & Ravelo, A. C. 2010 High Earth-system climate sensitivity determined from Pliocene carbon dioxide concentrations. Nat. Geosci. 3, 27-30. (doi:10.1038/ ngeo724)
8. Pagani, M., Zachos, J. C., Freeman, K. H., Tipple, B. & Bohaty, S. 2005 Marked decline in atmospheric carbon dioxide concentrations during the Paleogene. Science 309, 600-603. (doi:10.1126/science.1110063) (Pubitemid 41033641)
9. 2 records. Earth Planet. Sci. Lett. 292, 201-211. (doi:10.1016/j.epsl.2010.01.037)
10. 2 and ice sheet stability over major climate transitions of the last 20 million years. Science 326, 1394-1397. (doi:10.1126/science.1178296)
11. Hönisch, B., Hemming, G., Archer, D., Siddall, M. & McManus, J. F. 2009 Atmospheric carbon dioxide concentration across the Mid-Pleistocene Transition. Science 324, 1551-1554. (doi:10.1126/science.1171477)
12. Crowley, T. J. 1991 Are there any satisfactory geologic analogs for a future greenhouse warming. J. Clim. 3, 1282-1292. (doi:10.1175/1520-0442(1990) 0032.0.CO;2)
13. Kellogg, W. W. 1977 Effects of human activities on climate. World Meteorological Organization technical note 156 (WMO no. 486). World Meteorological Organization, Geneva, Switzerland.
14. Hansen, J. E. & Lebedeff, S. 1987 Global trends of measured surface air temperature. J. Geophys. Res. 92, 13 345-13 372. (doi:10.1029/ JD092iD11p13345)
15. Budyko, M. I. & Sedunov, Y. S. 1988 Anthropogenic climatic changes. In Conf. Climatic Change and Variability and Resulting Social, Economic and Technological Implications, Hamburg, Germany.
16. Zubakov, V. A. & Borzenkova, I. I. 1988 Pliocene palaeoclimates: Past climates as possible analogues for mid-twenty-first century climate. Palaeogeogr. Palaeoclimatol. Palaeoecol. 65, 35-49. (doi:10.1016/0031-0182(88) 90110-1)
17. Sellwood, B. W., Price, G. D. & Valdes, P. J. 1994 Cooler estimates of cretaceous temperatures. Nature 370, 453-455. (doi:10.1038/370453a0) (Pubitemid 24263548)
18. Fedorov, A. V., Brierley, C. M. & Emanuel, K. 2010 Tropical cyclones and permanent El Niño in the early Pliocene epoch. Nature 463, 1066-1070. (doi:10.1038/nature08831)
19. IPCC. 2007 Climate change 2007: The physical science basis. In Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor & H. L. Miller). Cambridge, UK: Cambridge University Press.
20. Meehl, G. A. et al. 2007 Global climate projections. In Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor & H. L. Miller). Cambridge, UK: Cambridge University Press.
21. Lunt, D. J., Haywood, A. M., Schmidt, G. A., Salzmann, U., Valdes, P. J. & Dowsett, H. J. 2010 Earth system sensitivity inferred from Pliocene modelling and data. Nat. Geosci. 3, 60-64. (doi:10.1038/ngeo706)
22. Gordon, C., Cooper, C., Senior, C. A., Banks, H., Gregory, J. M., Johns, T. C., Mitchell, J. F. B. & Wood, R. A. 2000 The simulation of SST, sea ice extents and ocean heat transports in a version of the Hadley Centre coupled model without flux adjustments. Clim. Dyn. 16, 147-168. (doi:10.1007/ s003820050010) (Pubitemid 30192427)
23. Lunt, D. J., Ross, I., Hopley, P. J. & Valdes, P. J. 2007 Modelling Late Oligocene C4 grasses and climate. Palaeogeogr. Palaeoclimatol. Palaeoecol. 251, 239-253. (doi:10.1016/ j.palaeo.2007.04.004) (Pubitemid 47039171)
24. 2 of the Hadley Centre coupled AOGCM with and without flux adjustment. Geophys. Res. Lett. 24, 1943-1946. (doi:10.1029/97GL01930)
25. Edwards, J. M. & Slingo, A. 1996 Studies with a flexible new radiation code 1: Choosing a configuration for a large-scale model. Q. J. R. Meteorol. Soc. 122, 689-719. (doi:10.1002/qj. 49712253107)
26. Cusack, S., Slingo, A., Edwards, J. M. & Wild, M. 1998 The radiative impact of a simple aerosol climatology on the Hadley Centre GCM. Q. J. R. Meteorol. Soc. 124, 2517-2526. (doi:10.1002/qj.49712455117) (Pubitemid 29126415)
27. Gregory, D., Kershaw, R. & Inness, P. M. 1997 Parameterisation of momentum transport by convection: II. Tests in single column and general circulation models. Q. J. R. Meteorol. Soc. 123, 1153-1183. (doi:10.1002/qj. 49712354103)
28. Cox, P., Betts, R., Bunton, C., Essery, R., Rowntree, P. R. & Smith, J. 1999 The impact of new land-surface physics on the GCM simulation and climate sensitivity. Clim. Dyn. 15, 183-203. (doi:10.1007/s003820050276) (Pubitemid 29240046)
29. Gent, P. R. & McWilliams, J. C. 1990 Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr. 20, 150-155. (doi:10.1175/1520-0485(1990) 0202.0.CO;2)
30. Cattle, H. & Crossley, J. 1995 Modelling arctic climate change. Phil. Trans. R. Soc. Lond. A 352, 201-213. (doi:10.1098/rsta.1995.0064) (Pubitemid 26440864)
31. 2 across the Cretaceous-Tertiary boundary. Geology 30, 703-706. (doi:10.1130/0091-7613(2002) 0302.0.CO;2)
32. Nordt, L., Atchley, S. & Dworkin, S. I. 2003 Terrestrial evidence for two greenhouse events in the latest Cretaceous. GSA Today 13, 4-9. (doi:10.1130/1052-5173(2003)013 2.0.CO;2) (Pubitemid 38106833)
33. Ekart, D. D., Cerling, T. E., Montanez, I. P. & Tabor, N. J. 1999 A 400 million year carbon isotope record of pedogenic carbonate: Implications for paleoatmospheric carbon dioxide. Am. J. Sci. 299, 805-827. (doi:10.2475/ajs.299. 10.805)
34. Hay, W. W. Migdisov, A., Balukhovsky, A. N., Wold, C. N. Flögel, S. & Söding, E. 2006 Evaporites and the salinity of the ocean during the Phanerozoic: Implications for climate, ocean circulation and life. Palaeogeography, Palaeoclimatology, Palaeoecology 240, 3-46. (doi:10.1016/j.palaeo.2006.03.044) (Pubitemid 44380262)
35. 2 driven ocean circulation changes as an amplifier of PETM hydrate destabilization. Geology 38, 875-878. (doi:10.1130/G31184.1)
36. Zachos, J. C. et al. 2005 Rapid acidification of the ocean during the Paleocene-Eocene Thermal Maximum. Science 308, 1611-1615. (doi:10.1126/science. 1109004) (Pubitemid 40807507)
37. Dunkley Jones, T., Ridgwell, A., Lunt, D. J., Maslin, M. A., Schmidt, D. N. & Valdes, P. J. 2010 A Palaeogene perspective on climate sensitivity and methane hydrate instability. Phil. Trans. R. Soc. A 368, 2395-2415. (doi:10.1098/rsta.2010.0053)
38. Kennett, J. P. & Stott, L. D. 1991 Abrupt deep-sea warming, palaeoceanographic changes and benthic extinctions at the end of the Paleocene. Nature 353, 225-229. (doi:10.1038/353225a0) (Pubitemid 21896755)
39. Pagani, M., Pedentchouk, N., Huber, M., Sluijs, A., Schouten, S., Brinkhuis, H., Sinninghe Damsté, J. S., Dickens, G. R. & Scientists, E. 2006 Arctic hydrology during global warming at the Palaeocene/Eocene Thermal Maximum. Nature 442, 671-675. (doi:10.1038/nature05043) (Pubitemid 44215319)
40. Sluijs, A. et al. 2007 Environmental precursors to rapid light carbon injection at the Palaeocene/Eocene boundary. Nature 450, 1218-1221. (doi:10.1038/nature06400)
41. Bowen, G. J., Beerling, D. J., Koch, P. L., Zachos, J. C. & Quattlebaum, T. 2004 A humid climate state during the Palaeocene/Eocene Thermal Maximum. Nature 432, 495-499. (doi:10.1038/nature03115) (Pubitemid 39576528)
42. Zachos, J. C., Wara, M. W., Bohaty, S., Delaney, M. L., Petrizzo, M. R., Brill, A., Bralower, T. J. & Premoli-Silva, I. 2003 A transient rise in tropical sea surface temperature during the Paleocene-Eocene Thermal Maximum. Science 302, 1551-1554. (doi:10.1126/science.1090110) (Pubitemid 37475695)
43. 2 release. Nat. Goesci. 3, 196-200. (doi:10.1038/ngeo755)
44. Ridgwell, A. 2007 Interpreting transient carbonate compensation depth changes by marine sediment core modeling. Paleoceanography 22, PA4102. (doi:10.1029/2006PA001372) (Pubitemid 351298249)
45. Kent, D. V., Cramer, B. S., Lanci, L., Wang, D., Wright, J. D. & Van der Voo, R. 2003 A case for a comet impact trigger for the Paleocene/Eocene Thermal Maximum and carbon isotope excursion. Earth Planet. Sci. Lett. 211, 13-26. (doi:10.1016/S0012-821X(03)00188-2) (Pubitemid 36755697)
46. Eldholm, O. & Thomas, E. 1993 Environmental impact of volcanic margin formation. Earth Planet. Sci. Lett. 117, 319-329. (doi:10.1016/0012-821X(93) 90087-P) (Pubitemid 24429685)
47. Thomas, D. J. & Bralower, T. J. 2005 Sedimentary trace element constraints on the role of North Atlantic Igneous Province volcanism in late Paleocene-early Eocene environmental change. Mar. Geol. 217, 233-254. (doi:10.1016/j.margeo.2005.02.009) (Pubitemid 40772211)
48. Kurtz, A. C., Kump, L. R., Arthur, M. A., Zachos, J. C. & Paytan, A. 2003 Early Cenozoic decoupling of the global carbon and sulfur cycles. Paleoceanography 18, 1090. (doi:10.1029/2003PA000908)
49. Higgins, J. A. & Schrag, D. P. 2006 Beyond methane: Towards a theory for the Paleocene- Eocene Thermal Maximum. Earth Planet. Sci. Lett. 245, 523-537. (doi:10.1016/j.epsl. 2006.03.009)
50. Svensen, H., Planke, S., Malthe-Sørenssen, A., Jamtveit, B., Myklebust, R., Rasmussen Eidem, T. & Rey, S. S. 2004 Release of methane from a volcanic basin as a mechanism for initial Eocene global warming. Nature 429, 542-545. (doi:10.1038/nature02566) (Pubitemid 38737654)
51. Dickens, G. R., O'Neil, D., Rea, D. K. & Owen, R. M. 1995 Dissociation of oceanic methane hydrate as a cause of the carbon isotope excursion at the end of the Paleocene. Paleoceanography 10, 965-971. (doi:10.1029/95PA02087) (Pubitemid 26462021)
52. Maslin, M. A. & Thomas, E. 2003 Balancing the deglacial global carbon budget: The hydrate factor. Quat. Sci. Rev. 22, 1729-1736. (doi:10.1016/S0277- 3791(03)00135-5) (Pubitemid 36914576)
53. 2 by deep-sea sediments in an Earth System model. Glob. Biogeochem. Cyc. 21, GB2008. (doi:10.1029/2006GB002764) (Pubitemid 47323957)
54. Zeebe, R. E., Zachos, J. C. & Dickens, G. R. 2009 Carbon dioxide forcing alone insufficient to explain Palaeocene-Eocene Thermal Maximum warming. Nat. Geosci. 2, 576-580. (doi:10.1038/ngeo578)
55. Panchuk, K., Ridgwell, A. & Kump, L. R. 2008 Sedimentary response to Paleocene- Eocene Thermal Maximum carbon release: A model-data comparison. Geology 36, 315-318. (doi:10.1130/G24474A.1) (Pubitemid 351753228)
56. Zeebe, R. E. & Zachos, J. C. 2007 Reversed deep-sea carbonate ion basin gradient during Paleocene-Eocene Thermal Maximum. Paleoceanography 22, PA3201. (doi:10.1029/ 2006PA001395)
57. Ridgwell, A. 2005 Changes in the mode of carbonate deposition: Implications for Phanerozoic ocean chemistry. Mar. Geol. 217, 339-357. (doi:10.1016/j.margeo.2004.10.036) (Pubitemid 40772217)
58. Caldeira, K. & Wickett, M. E. 2003 Anthropogenic carbon and ocean pH. Nature 425, 365. (doi:10.1038/425365a) (Pubitemid 37187256)
59. Zachos, J., Pagani, M., Sloan, L., Thomas, E. & Billups, K. 2001 Trends, rhythms, and aberrations in global climate 65 Ma to present. Science 292, 686-693. (doi:10.1126/science. 1059412) (Pubitemid 32385533)
60. Zachos, J. C., Dickens, G. R. & Zeebe, R. E. 2008 An early Cenozoic perspective on greenhouse warming and carbon-cycle dynamics. Nature 451, 279-283. (doi:10.1038/nature06588)
61. Wolfe, J. A. 1994 Tertiary climatic changes at middle latitudes of western North America. Palaeogeogr. Palaeoclimatol. Palaeoecol. 108, 195-205. (doi:10.1016/0031-0182(94)90233-X) (Pubitemid 24427654)
62. Bruch, A. A., Utescher, T., Mosbrugger, V., Gabrielyan, I. & Ivanov, D. A. 2006 Late Miocene climate in the circum-Alpine realm-a quantitative analysis of terrestrial palaeofloras. Palaeogeogr. Palaeoclimatol. Palaeoecol. 238, 270-280. (doi:10.1016/j.palaeo.2006.03.028) (Pubitemid 44175433)
63. Micheels, A., Bruch, A. A., Uhl, D., Utescher, T. & Mosbrugger, V. 2007 A Late Miocene climate model simulation with ECHAM4/ML and its quantitative validation with terrestrial proxy data. Palaeogeogr. Palaeoclimatol. Palaeoecol. 253, 251-270. (doi:10.1016/ j.palaeo.2007.03.042)
64. Markwick, P. J. 2007 The Paleogeographic and Paleoclimatic significance of climate proxies for data-model comparisons. In Deep-time perspectives on climate change: Marrying the signal from computer models and biological proxies (eds M. Williams, A. M. Haywood, F. J. Gregory & D. N. Schmidt), pp. 251-312. London, UK: The Micropaleontological Society Special Publication, The Geological Society. (Pubitemid 351144568)
65. Harrison, T. M. & Yin, A. 2004 Timing and processes of Himalayan and Tibetan uplift. Himalayan J. Sci. 2, 152-153.
66. Kohn, M. J. & Fremd, T. J. 2008 Miocene tectonics and climate forcing of biodiversity, western United States. Geology 36, 783-786. (doi:10.1130/G24928A.1)
67. Quade, J., Cerling T. E. & Bowman, J. R. 1989 Development of Asian monsoon revealed by marked ecological shift during the latest Miocene in northern Pakistan. Nature 342, 163-166. (doi:10.1038/342163a0) (Pubitemid 20409861)
68. Guo, Z. T. et al. 2002 Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China. Nature 416, 159-163. (doi:10.1038/ 416159a) (Pubitemid 34246469)
69. Spicer, R. A., Harris, N. B. W., Widdowson, M., Herman, A. B., Guo, S., Valdes, P. J., Wolfe, J. A. & Kelley, S. P. 2003 Constant elevation of southern Tibet over the past 15 million years. Nature 412, 622-624. (doi:10.1038/nature01356) (Pubitemid 36227667)
70. Sun, J., Zhang, Z. & Zhang, L. 2009 New evidence on the age of the Taklimakan Desert. Geology 37, 159-162. (doi:10.1130/G25338A.1)
71. Gregory-Wodzicki, K. M. 2000 Uplift history of the central and northern Andes: A review. Geol. Soc. Am. Bull. 112, 1091-1105. (doi:10.1130/0016- 7606(2000)112 2.0.CO;2) (Pubitemid 32832321)
72. English, J. M. & Johnston, S. T. 2004 The laramide orogeny: What were the driving forces? Int. Geol. Rev. 46, 833-838. (doi:10.2747/0020-6814.46.9. 833) (Pubitemid 39308320)
73. Spencer, J. E. 1996 Uplift of the Colorado Plateau due to lithosphere attenuation during Laramide low angle subduction. J. Geophys. Res. Solid Earth 101, 13 595-13 609. (doi:10.1029/96JB00818)
74. Flowers, R. M., Wernicke, B. P. & Farley, K. A. 2008 Unroofing, incision, and uplift history of the southwestern Colorado Plateau from apatite (U-Th)/He thermochronometry. Geol. Soc. Am. Bull. 120, 571-587. (doi:10.1130/B26231.1)
75. Moucha, R., Forte, A. M., Rowley, D. B., Mitrovica, J. X., Simmons, N. A. & Grand, S. P. 2009 Deep mantle forces and the uplift of the Colorado Plateau. Geophys. Res. Lett. 36, 1-6. (doi:10.1029/2009GL039778)
76. Jiménez-Moreno, G., Fauquette, S. & Suc, J.-P. 2008 Vegetation, climate and palaeoaltitude reconstructions of the eastern Alps during the Miocene based on pollen records from Austria, central Europe. J. Biogeogr. 35, 1638-1649. (doi:10.1111/j.1365-2699.2008.01911.x)
77. Pearson, P. N. & Palmer, M. R. 2000 Atmospheric carbon dioxide concentrations over the past 60 million years. Nature 406, 695-699. (doi:10.1038/35021000)
78. 2 concentrations. Mar. Micropaleontol. 27, 299-231. (doi:10.1016/0377-8398(95)00067-4)
79. 2 over Phanerozoic time. Am. J. Sci. 301, 182-204. (doi:10.2475/ajs.301.2.182)
80. Shevenell, A. E., Kennett, J. P. & Lea, D. W. 2004 Middle Miocene southern ocean cooling and Antarctic cryosphere expansion. Science 305, 1766-1770. (doi:10.1126/science.1100061) (Pubitemid 39249642)
81. Mosbrugger, V., Utescher, T. & Dilcher, D. L. 2005 Cenozoic continental climatic evolution of central Europe. Proc. Natl Acad. Sci. USA 102, 14 964-14 969. (doi:10.1073/pnas.0505267102) (Pubitemid 41513319)
82. Haywood, A. M., Chandler, M. A., Valdes, P. J., Salzmann, U., Lunt, D. J. & Dowsett, H. J. 2009 Comparison of Mid-Pliocene climate predictions produced by the HADAM3 and GCMAM3 general circulation models. Glob. Planet. Change 66, 208-224. (doi:10.1016/ j.gloplacha.2008.12.014)
83. Dowsett, H. J. & Cronin, T. M. 1990 High eustatic sea level during the Middle Pliocene: Evidence from the southeastern U.S. Atlantic Coastal Plain. Geology 18, 435-438. (doi:10.1130/ 0091-7613(1990)0182.3.CO;2)
84. Naish, T. et al. 2009 Obliquity-paced Pliocene West Antarctic ice sheet oscillations. Nature 458, 322-328. (doi:10.1038/nature07867)
85. 2 levels. Nature 454, 1102-1106. (doi:10.1038/nature07223)
86. Pollard, D. & DeConto, R. M. 2009 Modelling West Antarctic ice sheet growth and collapse through the past five million years. Nature 458, 329-332. (doi:10.1038/nature07809)
87. Hill, D. J., Haywood, A. M., Hindmarsh, R. C. A. & Valdes, P. J. 2007 Characterising ice sheets during the Mid Pliocene: Evidence from data and models. In Deep-time perspectives on climate change: Marrying the signal from computer models and biological proxies (eds M. Williams, A. M. Haywood, J. Gregory & D. Schmidt), pp. 517-538. London, UK: The Micropalaeontological Society Special Publication, The Geological Society. (Pubitemid 351144571)
88. Salzmann, U., Haywood, A. M., Lunt, D. J., Valdes, P. J. & Hill, D. J. 2008 A new global biome reconstruction and data-model comparison for the Middle Pliocene. Glob. Ecol. Biogeogr. 17, 432-447. (doi:10.1111/j.1466-8238. 2008.00381.x) (Pubitemid 351517444)
89. Cronin, T. M., Whatley, R. C.,Wood, A., Tsukagoshi, A., Ikeya, N., Brouwers, E. M. & Briggs, W. M. 1993 Microfaunal evidence for elevated Mid-Pliocene temperatures in the Arctic Ocean. Paleoceanography 8, 161-173. (doi:10.1029/93PA00060) (Pubitemid 23392956)
90. Robinson, M. M. 2009 New quantitative evidence of extreme warmth in the Pliocene Arctic. Stratigraphy 6, 265-275.
91. Moran, K. et al. 2006 The Cenozoic palaeoenvironment of the Arctic Ocean. Nature 441, 601-605. (doi:10.1038/nature04800) (Pubitemid 43927287)
92. Polyak, L. et al. 2010 History of sea-ice in the Arctic. Q. Sci. Rev. 29, 1757-1778. (doi:10.1016/ j.quascirev.2010.02.010)
93. Lisiecki, L. E. & Raymo, M. E. 2005 A Pliocene-Pleistocene stack of 57 globally distributed benthic d18O records. Paleoceanography 20, PA1003. (doi:10.1029/2004PA001071) (Pubitemid 40865277)
94. Haywood, A. M. et al. 2010 Pliocene Model Intercomparison Project (PlioMIP): Experimental design and boundary conditions (experiment 1). Geosci. Model Dev. 3, 227-242. (doi:10.5194/ gmd-3-227-2010)
95. Dowsett, H. J., Robinson, M., Haywood, A. M., Salzmann, U., Hill, D. J., Sohl, L., Chandler, M. A., Williams, M. Foley, K. & Stoll, D. 2010 The PRISM3D paleoenvironmental reconstruction. Stratigraphy 7, 123-139.
96. Jansen, E. et al. 2007 Palaeoclimate. In Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor & H. L. Miller). Cambridge, UK: Cambridge University Press
97. Haywood, A. M., Valdes, P. J. & Sellwood, B. W. 2000 Global scale palaeoclimate reconstruction of the Middle Pliocene climate using the UKMO GCM: Initial results. Glob. Planet. Change 25, 239-256. (doi:10.1016/S0921-8181(00) 00028-X) (Pubitemid 30491615)
98. Dowsett, H. J., Cronin, T. M., Poore, P. Z., Thompson, R. S., Whatley, R. C. & Wood, A. M. 1992 Micropaleontological evidence for increased meridional heat-transport in the North Atlantic Ocean during the Pliocene. Science 258, 1133-1135. (doi:10.1126/science.258. 5085.1133) (Pubitemid 23387399)
99. Haywood, A. M. & Valdes, P. J. 2004 Modelling Middle Pliocene warmth: Contribution of atmosphere, oceans and cryosphere. Earth Planet. Sci. Lett. 218, 363-377. (doi:10.1016/S0012- 821X(03)00685-X) (Pubitemid 38204460)
100. Haywood, A. M., Sellwood, B. W. & Valdes, P. J. 2000 Regional warming: Pliocene (3 Ma) paleoclimate of Europe and the Mediterranean. Geology 28, 1063-1066. (doi:10.1130/0091- 7613(2000)282.0.CO;2) (Pubitemid 32876377)
101. Bonham, S. G., Haywood, A. M., Lunt, D. J., Collins, M. & Salzmann, U. 2009 El Niño- Southern Oscillation, Pliocene climate and equifinality. Phil. Trans. R. Soc. A 367, 127-156. (doi:10.1098/rsta.2008.0212)
102. Dowsett, H., Barron, J. & Poore, R. 1996 Middle Pliocene sea surface temperatures: A global reconstruction. Mar. Micropaleontol. 27, 13-26. (doi:10.1016/0377-8398(95)00050-X)
103. Sohl, L. E., Chandler, M. A., Schmunk, R. B., Mankoff, K., Jonas, J. A., Foley, K. M. & Dowsett, H. J. 2009 PRISM3/GISS topographic reconstruction. US Geological Survey Data Series, no. 419.
104. Thompson, R. S. & Fleming, R. F. 1996 Middle Pliocene vegetation: Reconstructions, paleoclimatic inferences, and boundary conditions for climatic modelling. Mar. Micropaleontol. 27, 27-49. (doi:10.1016/0377-8398(95)00051-8)
105. Bartoli, G., Sarnthein, M., Weinelt, M., Erlenkeuser, H., Garbe-Schonberg D. & Lea, D. W. 2005 Final closure of Panama and the onset of Northern Hemisphere glaciations. Earth Planet. Sci. Lett. 237, 33-44. (doi:10.1016/j.epsl.2005.06.020) (Pubitemid 41235823)
106. Lunt D. J., Valdes, P. J., Haywood, A. M. & Rutt, I. C. 2008 Closure of the Panama Seaway during the Pliocene: Implications for climate and Northern Hemisphere glaciation. Clim. Dyn. 30, 1-18. (doi:10.1007/s00382-007-0265-6) (Pubitemid 350131391)
107. Schneider, B. & Schmittner, A. 2006 Simulating the impact of the Panamanian seaway closure on ocean circulation, marine productivity and nutrient cycling. Earth Planet. Sci. Lett. 246, 367-380. (doi:10.1016/j.epsl.2006.04. 028) (Pubitemid 43869436)
108. Charney, J., Arakawa, A., Baker, D. J., Bolin, B., Dickinson, R. E., Goody, R. M., Leith, C. E., Stommel, H. M. & Wunsch, C. I. 1979 Carbon dioxide and climate: A scientific assessment. Report to the National Research Council. Washington, DC: National Academy of Sciences. See http://www.atmos. ucla.edu/~brianpm/download/charney-report.pdf.
109. Hansen, J., Lacis, D., Rind, D., Russell, G., Stone, P., Fung, I., Ruedy, R. & Lerner, J.1984 Climate sensitivity: Analysis of feedback mechanisms. In Climate processes and climate sensitivity (eds J. E. Hansen & T. Takahashi), American Geophysical Union Monograph 29, Maurice Ewing vol. 5, pp. 130-163. Washington, DC: American Geophysical Union.
110. Slingo, A. 1985 Handbook of the Meteorological Office 11-layer atmospheric general circulation model. Vol. 1: Model description. Bracknell, UK: UK Meteorological Office.
111. Andronova, N. & Schlesinger, M. E. 2001 Objective estimation of the probability distribution for climate sensitivity. J. Geophys. Res. 106, 22 605-22 612. (doi:10.1029/2000JD000259)
112. Frame, D. J. et al. 2005 Constraining climate forecasts: The role of prior assumptions. Geophys. Res. Lett. 32, L09702. (doi:10.1029/2004GL022241) (Pubitemid 40875828)
113. Annan, J. D. & Hargreaves, J. C. 2006 Using multiple observationally-based constraints to estimate climate sensitivity. Geophys. Res. Lett. 33, L06704. (doi:10.1029/2005GL025259)
114. Knutti, R. & Hegerl, G. C. 2008 The equilibrium sensitivity of the Earth's temperature to radiation changes. Nature Geosci. 1, 735-743. (doi:10.1038/ngeo337)
115. Stern, N. 2007 The economics of climate change. Cambridge, UK: Cambridge University Press.
116. Meinshausen, M. et al. 2009 Greenhouse-gas emission targets for limiting global warming to 2°C. Nature 458, 1158-1162. (doi:10.1038/nature08017)
117. Cox, P. et al. 2000 Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model. Nature 408, 184-187. (doi:10.1038/ 35041539)
118. de Noblet, N. I., Prentice, I. C., Joussaume, S., Texier, D., Botta, A. & Haxeltine, A. 1996 Possible role of atmosphere-biosphere interactions in triggering the last glaciation. Geophys. Res. Lett. 23, 3191-3194. (doi:10.1029/96GL03004)
119. Peltier, W. R. 2004 Global glacial isostasy and the surface of the ice-age Earth: The ICE- 5G (VM2) model and GRACE. Annu. Rev. Earth Planet. Sci. 32, 111-149. (doi:10.1146/ annurev.earth.32.082503.144359) (Pubitemid 38836368)
120. 2: Where should humanity aim? Open Atmos. Sci. J. 2, 217-231. (doi:10.2174/1874282300802010217)
121. Collins, W. D. et al. 2006 Radiative forcing by well-mixed greenhouse gases: Estimates from climate models in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4). J. Geophys. Res. 111, D14317. (doi:10.1029/2005JD006713) (Pubitemid 46055369)
122. Spicer, R. A., Ahlberg, A., Herman, A. B., Hofmann, C. C., Raikevich, M., Valdes, P. J. & Markwick, P. J. 2008 The Late Cretaceous continental interior of Siberia: A challenge for climate models. Earth Planet. Sci. Lett. 267, 228-235. (doi:10.1016/j.epsl.2007.11.049)
123. Pope, J. O., Collins, M., Haywood, A. M., Dowsett, H. J., Hill, D. J. & Lunt, D. J. 2010 Plio-QUMP: Quantifying Uncertainty in Model Predictions for the Pliocene. Eos Trans. AGU, 90(52), Fall Meet. Suppl.
124. Zheng, W., Braconnot, P., Guilyardi, E., Merkel, U. & Yu, Y. 2008 ENSO at 6 ka and 21 ka from ocean-atmosphere coupled model simulations. Clim. Dyn. 30, 745-762. (doi:10.1007/ s00382-007-0320-3)
125. Edwards, T. L. Crucifix, M. & Harrison, S. P. 2007 Using the past to constrain the future: How the palaeorecord can improve estimates of global warming. Progr. Phys. Geogr. 31, 481-500. (doi:10.1177/0309133307083295) (Pubitemid 350246072)