Abstract
The El Niño/Southern Oscillation (ENSO) is the leading mode of tropical Pacific interannual variability in the present-day climate. Available proxy evidence suggests that ENSO also existed during past climates, for example during the Pliocene extending from about 5.3 million to about 2.6 million years BP. Here we investigate the influences of the Panama Seaway closing and Indonesian Passages narrowing, and also of atmospheric carbon dioxide (CO2) on the tropical Pacific mean climate and annual cycle, and their combined impact on ENSO during the Pliocene. To this end the Kiel Climate Model), a global climate model, is employed to study the influences of the changing geometry and CO2-concentration. We find that ENSO is sensitive to the closing of the Panama Seaway, with ENSO amplitude being reduced by about 15–20 %. The narrowing of the Indonesian Passages enhances ENSO strength but only by about 6 %. ENSO period changes are modest and the spectral ENSO peak stays rather broad. Annual cycle changes are more prominent. An intensification of the annual cycle by about 50 % is simulated in response to the closing of the Panama Seaway, which is largely attributed to the strengthening of meridional wind stress. In comparison to the closing of the Panama Seaway, the narrowing of the Indonesian Passages only drives relatively weak changes in the annual cycle. A robust relationship is found such that ENSO amplitude strengthens when the annual cycle amplitude weakens.
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References
An S-I, Choi J (2013) Inverse relationship between the equatorial eastern Pacific annual-cycle and ENSO amplitudes in a coupled general circulation model. Clim Dyn 40(3–4):663–675. doi:10.1007/s00382-012-1403-3
Anderson DL, McCreary JP (1985) Slowly propagating disturbances in a coupled ocean–atmosphere model. J Atmos Sci 42(6):615–630. doi:10.1175/1520-0469(1985)042<0615:SPDIAC>2.0.CO;2
Bellenger H et al (2014) ENSO representation in climate models: from CMIP3 to CMIP5. Clim Dyn 42:1999–2018. doi:10.1007/s00382-013-1783-z
Bjerknes J (1969) Atmospheric teleconnections from the equatorial Pacific. Mon Weather Rev 97(3):163–172. doi:10.1175/1520-0493(1969)097<0163:ATFTEP>2.3.CO;2
Brierley CM (2015) Interannual climate variability seen in the Pliocene Model Intercomparison Project. Clim Past Discuss 10(5):3787–3820. doi:10.5194/cpd-10-3787-2014
Brierley CM, Fedorov AV, Liu Z, Herbert TD, Lawrence KT, LaRiviere JP (2009) Greatly expanded tropical warm pool and weakened Hadley circulation in the early Pliocene. Science 323(5922):1714–1718. doi:10.1126/science.1167625
Cane MA, Molnar P (2001) Closing of the Indonesian seaway as a precursor to east African aridification around 3–4 million years ago. Nature 411(6834):157–162. doi:10.1038/35075500
Chang P, Wang B, Li T, Ji L (1994) Interactions between the seasonal cycle and the Southern Oscillation-Frequency entrainment and chaos in a coupled ocean–atmosphere model. Geophys Res Lett 21(25):2817–2820. doi:10.1029/94GL02759
Cobb KM, Charles CD, Cheng H, Edwards RL (2003) El Nino/Southern Oscillation and tropical Pacific climate during the last millennium. Nature 424(6946):271–276. doi:10.1038/nature01779
Collins M et al (2010) The impact of global warming on the tropical Pacific Ocean and El Niño. Nat Geosci 3(6):391–397. doi:10.1038/ngeo868
Davies A, Kemp AE, Weedon GP, Barron JA (2012) El Niño-Southern Oscillation variability from the late cretaceous Marca shale of California. Geology 40(1):15–18. doi:10.1130/G32329.1
DiNezio PN, Kirtman BP, Clement AC, Lee SK, Vecchi GA, Wittenberg A (2012) Mean climate controls on the simulated response of ENSO to increasing greenhouse gases. J Clim 25(21):7399–7420. doi:10.1175/JCLI-D-11-00494.1
Dowsett HJ, Robinson MM, Haywood AM, Hill DJ, Dolan AM, Stoll DK, Riesselman CR (2012) Assessing confidence in Pliocene sea surface temperatures to evaluate predictive models. Nat Clim Change 2(5):365–371. doi:10.1038/nclimate1455
Fedorov AV, Dekens PS, McCarthy M, Ravelo AC, Barreiro M, Pacanowski RC, Philander SG (2006) The Pliocene paradox (mechanisms for a permanent El Niño). Science 312(5779):1485–1489. doi:10.1126/science.1122666
Fedorov AV, Brierley CM, Emanuel K (2010) Tropical cyclones and permanent El Nino in the early Pliocene epoch. Nature 463(7284):1066–1070. doi:10.1038/nature08831
Fedorov AV, Brierley CM, Lawrence KT, Liu Z, Dekens PS, Ravelo AC (2013) Patterns and mechanisms of early Pliocene warmth. Nature 496(7443):43–49. doi:10.1038/nature12003
Folland CK, Palmer TN, Parker DE (1986) Sahel rainfall and worldwide sea temperatures, 1901–85. Nature 320:602–607. doi:10.1038/320602a0
Galeotti S, Von der Heydt A, Huber M, Bice D, Dijkstra H, Jilbert T, Reichart G-J (2010) Evidence for active El Niño Southern Oscillation variability in the Late Miocene greenhouse climate. Geology 38(5):419–422. doi:10.1130/G30629.1
Graham FS, Brown JN, Langlais C, Marsland SJ, Wittenberg AT, Holbrook NJ (2014) Effectiveness of the Bjerknes stability index in representing ocean dynamics. Clim Dyn 43(9–10):2399–2414. doi:10.1007/s00382-014-2062-3
Haywood AM, Valdes PJ, Peck VL (2007) A permanent El Niño-like state during the Pliocene? Paleoceanography. doi:10.1029/2006pa001323
Haywood AM, Dowsett HJ, Robinson MM, Stoll DK, Dolan AM, Lunt DJ, Chandler MA (2011) Pliocene Model Intercomparison Project (PlioMIP): experimental design and boundary conditions (Experiment 2). Geosci Model Dev 4(3):571–577. doi:10.5194/gmd-4-571-2011
Huang P (2015) Seasonal changes in tropical SST and the surface energy budget under global warming projected by CMIP5 models. J Clim 28(16):6503–6515. doi:10.1175/JCLI-D-15-0055.1
Huber M, Caballero R (2003) Eocene El Nino: evidence for robust tropical dynamics in the “hothouse”. Science 299(5608):877–881. doi:10.1126/science.1078766
Jin F-F, Neelin JD, Ghil M (1996) El Niño/Southern Oscillation and the annual cycle: subharmonic frequency locking and aperiodicity. Phys D 98:442–465
Jin F-F, Kim ST, Bejarano L (2006) A coupled-stability index for ENSO. Geophys Res Lett. doi:10.1029/2006gl027221
Jochum M, Fox-Kemper B, Molnar P, Shields C (2009) Differences in the Indonesian seaway in a coupled climate model and their relevance to Pliocene climate and El Ninõ. Paleoceanography. doi:10.1029/2008PA001678
Karas C, Nürnberg D, Gupta AK, Tiedemann R, Mohan K, Bickert T (2009) Mid-Pliocene climate change amplified by a switch in Indonesian subsurface throughflow. Nat Geosci 2(6):434–438. doi:10.1038/ngeo520
Kim ST, Jin F-F (2010a) An ENSO stability analysis. Part I: results from a hybrid coupled model. Clim Dyn 36(7–8):1593–1607. doi:10.1007/s00382-010-0796-0
Kim ST, Jin F-F (2010b) An ENSO stability analysis. Part II: results from the twentieth and twenty-first century simulations of the CMIP3 models. Clim Dyn 36(7–8):1609–1627. doi:10.1007/s00382-010-0872-5
Kim ST, Jin F-F (2011) An ENSO stability analysis. Part II: results from the twentieth and twenty-first century simulations of the CMIP3 models. Clim Dyn 36(7–8):1609–1627. doi:10.1007/s00382-010-0872-5
Krebs U, Park W, Schneider B (2011) Pliocene aridification of Australia caused by tectonically induced weakening of the Indonesian Throughflow. Palaeogeogr Palaeoclimatol Palaeoecol 309(1):111–117. doi:10.1016/j.palaeo.2011.06.002
Latif M, Keenlyside NS (2009) El Nino/Southern Oscillation response to global warming. Proc Natl Acad Sci USA 106(49):20578–20583. doi:10.1073/pnas.0710860105
Latif M, Roeckner E, Botzet M, Esch M, Haak H, Hagemann S, Jungclaus J, Legutke S, Marsland S, Mikolajewicz U, Mitchell J (2004) Reconstructing, monitoring, and predicting multidecadal-scale changes in the North Atlantic thermohaline circulation with sea surface temperature. J Clim 17:1605–1614. doi:10.1175/1520-0442(2004)017<1605:RMAPMC>2.0.CO;2
Latif M, Semenov VA, Park W (2015) Super El Niños in response to global warming in a climate model. Clim Change. doi:10.1007/s10584-015-1439-6
Li T, Philander SGH (1996) On the annual cycle of the eastern equatorial Pacific. J Clim 9(12):2986–2998. doi:10.1175/1520-0442(1996)009<2986:OTACOT>2.0.CO;2
Liu Z (1996) Modeling the equatorial annual cycle with a linear coupled model. J Clim 9:2376–2385. doi:10.1175/1520-0442(1996)009<2376:MEACWA>2.0.CO;2
Liu Z (2002) A simple model study of ENSO suppression by external periodic forcing. J Clim 15(9):1088–1098. doi:10.1175/1520-0442(2002)015<1088:ASMSOE>2.0.CO;2
Liu Z, Xie SP (1994) Equatorward propagation of coupled air–sea disturbances with application to the annual cycle of the eastern tropical Pacific. J Atmos Sci 51:3807–3822. doi:10.1175/1520-0469(1994)051<3807:EPOCAD>2.0.CO;2
Lübbecke JF, McPhaden MJ (2013) A comparative stability analysis of Atlantic and Pacific Niño modes. J Clim 26(16):5965–5980. doi:10.1175/jcli-d-12-00758.1
Lübbecke JF, McPhaden MJ (2014) Assessing the twenty-first-century shift in ENSO variability in terms of the Bjerknes stability index. J Clim 27:2577–2587. doi:10.1175/JCLI-D-13-00438.1
Madec G (2008) NEMO ocean engine. Note du Pole de modélisation 27, Institut Pierre-Simon Laplace, p 193
Maier-Reimer E, Mikolajewicz U, Crowley T (1990) Ocean general circulation model sensitivity experiment with an open Central American Isthmus. Paleoceanography 5(3):349–366. doi:10.1029/PA005i003p00349
Manucharyan GE, Fedorov AV (2014) Robust ENSO across a wide range of climates. J Clim 27(15):5836–5850. doi:10.1175/jcli-d-13-00759.1
McGregor S, Timmermann A, England MH, Elison Timm O, Wittenberg AT (2013) Inferred changes in El Niño-Southern Oscillation variance over the past six centuries. Clim Past Discuss 9(5):2269–2284. doi:10.5194/cp-9-2269-2013
Mechoso CR et al (1995) The seasonal cycle over the tropical Pacific in coupled ocean–atmosphere general circulation models. Mon Weather Rev 123:2825–2838. doi:10.1175/1520-0493(1995)123<2825:TSCOTT>2.0.CO;2
Pagani M, Liu Z, LaRiviere J, Ravelo AC (2009) High earth-system climate sensitivity determined from Pliocene carbon dioxide concentrations. Nat Geosci 3(1):27–30. doi:10.1038/ngeo724
Park W, Keenlyside N, Latif M, Ströh A, Redler R, Roeckner E, Madec G (2009) Tropical Pacific climate and its response to global warming in the Kiel climate model. J Clim 22(1):71–92. doi:10.1175/2008jcli2261.1
Roeckner E, Bäuml G, Bonaventura L, Brokopf R, Esch M, Giorgetta M, Manzini E (2003) The atmospheric general circulation model ECHAM5. Part I: model description. Max Planck Institute for Meteorology, Hamburg, Germany, Report No. 349, p 127
Scroxton N, Bonham SG, Rickaby RE, Lawrence SHF, Hermoso M, Haywood AM (2011) Persistent El Niño-Southern Oscillation variation during the Pliocene Epoch. Paleoceanography. doi:10.1029/2010PA002097
Timmermann A, Jin FF, Collins M (2004) Intensification of the annual cycle in the tropical Pacific due to greenhouse warming. Geophys Res Lett. doi:10.1029/2004GL019442
Timmermann A, Okumura Y, An SI, Clement A, Dong B, Guilyardi E, Yin J (2007) The influence of a weakening of the Atlantic meridional overturning circulation on ENSO. J Clim 20(19):4899–4919. doi:10.1175/jcli4283.1
Valcke S (ed) (2006) OASIS3 user guide. PRISM Tech. Rep. 3. http://www.prism.enes.org/Publications/Reports/oasis3_UserGuide_T3.pdf
Vecchi GA, Soden BJ (2007) Global warming and the weakening of the tropical circulation. J Clim 20(17):4316–4340. doi:10.1175/JCLI4258.1
Wara MW, Ravelo AC, Delaney ML (2005) Permanent El Nino-like conditions during the Pliocene warm period. Science 309(5735):758–761. doi:10.1126/science.1112596
Watanabe T, Suzuki A, Minobe S, Kawashima T, Kameo K, Minoshima K, Kase T (2011) Permanent El Nino during the Pliocene warm period not supported by coral evidence. Nature 471(7337):209–211. doi:10.1038/nature09777
Wu L, He F, Liu Z (2005) Coupled ocean–atmosphere response to tropical North Atlantic SST variability: tropical Atlantic Dipole and ENSO. Geophys Res Lett 32:L21712. doi:10.1029/2005GL024222
Xie S-P (1994) On the genesis of the equatorial annual cycle. J Clim 7:2008–2013. doi:10.1175/1520-0442(1994)007<2008:OTGOTE>2.0.CO;2
Xie S-P (1996) Westward propagation of latitudinal asymmetry in a coupled ocean–atmosphere model. J Atmos Sci 53:3236–3250. doi:10.1175/1520-0469(1996)053<3236:WPOLAI>2.0.CO;2
Xie SP, Kubokawa A, Hanawa K (1989) Oscillations with two feedback processes in a coupled ocean–atmosphere model. J Clim 2(9):946–964. doi:10.1175/1520-0442(1989)002<0946:OWTFPI>2.0.CO;2
Zebiak SE, Cane MA (1987) A model EI Nino-Southern Oscillation. Mon Weather Rev 115:2262–2278. doi:10.1175/1520-0493(1987)115<2262:AMENO>2.0.CO;2
Zhang R, Delworth T (2005) Simulated tropical response to a substantial weakening of the Atlantic thermohaline circulation. J Clim 18:1853–1860. doi:10.1175/JCLI3460.1
Zhang X, Prange M, Steph S, Butzin M, Krebs U, Lunt DJ, Schulz M (2012) Changes in equatorial Pacific thermocline depth in response to Panama seaway closure: insights from a multi-model study. Earth Planet Sci Lett 317:76–84. doi:10.1016/j.epsl.2011.11.028
Acknowledgments
This study was supported by the Excellence Cluster “The Future Ocean” at Kiel University and the SFB 754 “Climate-Biogeochemistry Interactions in the Tropical Ocean”, which both are sponsored by the German Science Foundation (DFG). The model simulations were conducted at the Computing Center of Kiel University. Zhaoyang Song is a Ph.D. student, sponsored by the Chinese Scholarship Council (CSC).
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Song, Z., Latif, M., Park, W. et al. Influence of seaway changes during the Pliocene on tropical Pacific climate in the Kiel climate model: mean state, annual cycle, ENSO, and their interactions. Clim Dyn 48, 3725–3740 (2017). https://doi.org/10.1007/s00382-016-3298-x
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DOI: https://doi.org/10.1007/s00382-016-3298-x