Abstract
Climate models project an El Niño-like SST response in the tropical Pacific Ocean to global warming (GW). By employing the Community Earth System Model and applying an overriding technique to its ocean component, Parallel Ocean Program version 2, this study investigates the similarity and difference of formation mechanism for the changes in the tropical Pacific Ocean under El Niño and GW. Results show that, despite sharing some similarities between the two scenarios, there are many significant distinctions between GW and El Niño: (1) the phase locking of the seasonal cycle reduction is more notable under GW compared with El Niño, implying more extreme El Niño events in the future; (2) in contrast to the penetration of the equatorial subsurface temperature anomaly that appears to propagate in the form of an oceanic equatorial upwelling Kelvin wave during El Niño, the GW-induced subsurface temperature anomaly manifest in the form of off-equatorial upwelling Rossby waves; (3) while significant across-equator northward heat transport (NHT) is induced by the wind stress anomalies associated with El Niño, little NHT is found at the equator due to a symmetric change in the shallow meridional overturning circulation that appears to be weakened in both North and South Pacific under GW; and (4) heat budget analysis shows that the maintaining mechanisms for the eastern equatorial Pacific warming are also substantially different.
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References
Alory G, Meyers G (2009) Warming of the Upper Equatorial Indian Ocean and changes in the heat budget (1960–99). J Clim 22:93–113. doi:10.1175/2008JCLI2330.1
An SI, Wang B (2000) Interdecadal change of the structure of the ENSO mode and its impact on the ENSO frequency. J Clim 13:2044–2055. doi:10.1175/1520-0442(2000)013<2044:ICOTSO>2.0.CO;2
Battisti DS (1988) Dynamics and thermodynamics of a warming event in a coupled tropical atmosphere-ocean model. J Atmos Sci 45:2889–2919
Bjerknes J (1969) Atmospheric teleconnections from the equatorial Pacific. Mon Weather Rev 97:163–172. doi:10.1175/1520-0493(1969)097<0163:ATFTEP>2.3.CO;2
Cai W, Borlace S, Lengaigne M et al (2014) Increasing frequency of extreme El Niño events due to greenhouse warming. Nat Clim Chang 5:1–6. doi:10.1038/nclimate2100
Clement A, DiNezio P, Deser C (2011) Rethinking the ocean’s role in the Southern Oscillation. J Clim 24:4056–4072. doi:10.1175/2011JCLI3973.1
Collins M, An S-I, Cai W et al (2010) The impact of global warming on the tropical Pacific Ocean and El Niño. Nat Geosci 3:391–397. doi:10.1038/ngeo868
Deser C, Phillips AS, Tomas RA et al (2012) ENSO and Pacific decadal variability in the Community Climate System Model Version 4. J Clim 25:2622–2651. doi:10.1175/JCLI-D-11-00301.1
DiNezio PN, Clement AC, Vecchi GA et al (2009) Climate response of the equatorial pacific to global warming. J Clim 22:4873–4892. doi:10.1175/2009JCLI2982.1
Dinezio PN, Kirtman BP, Clement AC et al (2012) Mean climate controls on the simulated response of ENSO to increasing greenhouse gases. J Clim 25:7399–7420. doi:10.1175/JCLI-D-11-00494.1
Dwyer JG, Biasutti M, Sobel AH (2012) Projected changes in the seasonal cycle of surface temperature. J Clim 25:6359–6374. doi:10.1175/JCLI-D-11-00741.1
Fedorov AV, Philander SG (2001) A stability analysis of tropical ocean-atmosphere interactions: bridging measurements and theory for El Niño. J Clim 14:3086–3101. doi:10.1175/1520-0442(2001)014<3086:ASAOTO>2.0.CO;2
Feldl N, Bordoni S (2015) Characterizing the Hadley circulation response through regional climate feedbacks. J Clim. doi:10.1175/JCLI-D-15-0424.1
Guilyardi E, Wittenberg A, Fedorov A et al (2009) Understanding El Niño in ocean-atmosphere general circulation models: progress and challenges. Bull Am Meteorol Soc 90:325–340. doi:10.1175/2008BAMS2387.1
Hazeleger W, Seager R, Cane MA, Naik NH (2004) How can tropical Pacific Ocean heat transport vary? J Phys Oceanogr 34:320–333. doi:10.1175/1520-0485(2004)034<0320:HCTPOH>2.0.CO;2
Held IM, Soden BJ (2006) Robust responses of the hydrological cycle to global warming. J Clim 19:5686–5699. doi:10.1175/JCLI3990.1
Huang B, Xue Y, Zhang D et al (2010) The NCEP GODAS ocean analysis of the tropical Pacific mixed layer heat budget on seasonal to interannual time scales. J Clim 23:4901–4925. doi:10.1175/2010JCLI3373.1
Huang B, Xue Y, Wang H et al (2012) Mixed layer heat budget of the El Niño in NCEP climate forecast system. Clim Dyn 39:365–381. doi:10.1007/s00382-011-1111-4
Jia F, Wu L (2013) A study of response of the equatorial Pacific SST to Doubled-CO2 forcing in the coupled CAM–1.5-layer reduced-gravity ocean model. J Phys Oceanogr 43:1288–1300. doi:10.1175/JPO-D-12-0144.1
Jin F-F (1996) Tropical ocean-atmosphere interaction, the Pacific cold tongue, and the El Niño-Southern oscillation. Science 274:76–78. doi:10.1126/science.274.5284.76
Jin F-F (1997a) An equatorial ocean recharge paradigm for ENSO. Part I: conceptual model. J Atmos Sci 54:811–829. doi:10.1175/1520-0469(1997)054<0811:AEORPF>2.0.CO;2
Jin F-F (1997b) An equatorial ocean recharge paradigm for ENSO. Part II: a stripped-down coupled model. J Atmos Sci 54:830–847. doi:10.1175/1520-0469(1997)054<0830:AEORPF>2.0.CO;2
Knutson TR, Manabe S (1995) Time-mean response over the tropical Pacific to increased CO2 in a coupled ocean-atmosphere model. J Clim 8:2181–2199. doi:10.1175/1520-0442(1995)008<2181:TMROTT>2.0.CO;2
Li G, Xie S-P (2012) Origins of tropical-wide SST biases in CMIP multi-model ensembles. Geophys Res Lett 39:L22703. doi:10.1029/2012GL053777
Li G, Xie S-P (2014) Tropical biases in CMIP5 multimodel ensemble: the excessive equatorial pacific cold tongue and double ITCZ problems. J Clim 27:1765–1780. doi:10.1175/JCLI-D-13-00337.1
Li G, Xie S-P, Du Y, Luo Y (2016) Effects of excessive equatorial cold tongue bias on the projections of tropical Pacific climate change. Part I: the warming pattern in CMIP5 multi-model ensemble. Clim Dyn 28:7630–7640. doi:10.1007/s00382-016-3043-5
Li G, Du Y, Xu H, Ren B (2015) An intermodel approach to identify the source of excessive equatorial Pacific cold tongue in CMIP5 models and uncertainty in observational datasets. J Clim 28:7630–7640. doi:10.1175/JCLI-D-15-0168.1
Liu Z, Vavrus S, He F et al (2005) Rethinking tropical ocean response to global warming: the enhanced equatorial warming. J Clim 18:4684–4700. doi:10.1175/JCLI3579.1
Lloyd J, Guilyardi E, Weller H (2012) The role of atmosphere feedbacks during ENSO in the CMIP3 models. Part III: the shortwave flux feedback. J Clim 25:4275–4293. doi:10.1175/JCLI-D-11-00178.1
Lu J, Zhao B (2012) The role of oceanic feedback in the climate response to doubling CO2. J Clim 25:7544–7563. doi:10.1175/JCLI-D-11-00712.1
Luo Y, Liu Q, Rothstein L (2009) Simulated response of North Pacific mode waters to global warming. Geophys Res Lett 36:L23609. doi:10.1029/2009GL040906
Luo Y, Lu J, Liu F, Liu W (2015) Understanding the El Niño-like oceanic response in the tropical Pacific to global warming. Clim Dyn 45:1945–1964. doi:10.1007/s00382-014-2448-2
Ma J, Xie S-P (2013) Regional patterns of sea surface temperature change: a source of uncertainty in future projections of precipitation and atmospheric circulation. J. Climate 26:2482–2501
McCreary JP Jr, Lu P (1994) Interaction between the subtropical and equatorial ocean circulations: the subtropical cell. J Phys Oceanogr 24(2):466–497
McPhaden MJ, Picaut J (1990) El Niño-southern oscillation displacements of the Western equatorial pacific warm pool. Science 250:1385–1388. doi:10.1126/science.250.4986.1385
McPhaden MJ, Zhang D (2002) Slowdown of the meridional overturning circulation in the upper Pacific Ocean. Nature 415:603–608. doi:10.1038/415603a
Neelin JD, Battisti DS, Hirst AC et al (1998) ENSO theory. J Geophys Res 103:14261. doi:10.1029/97JC03424
Ohba M, Ueda H (2007) An impact of SST anomalies in the Indian Ocean in acceleration of the El Niño to La Niña transition. J Meteorol Soc Japan 85:335–348. doi:10.2151/jmsj.85.335
Okumura YM, Ohba M, Deser C, Ueda H (2011) A proposed mechanism for the asymmetric duration of El Niño and La Niña. J Clim 24:3822–3829. doi:10.1175/2011JCLI3999.1
Pacanowski RC, Philander SGH (1981) Parameterization of vertical mixing in numerical models of tropical oceans. J Phys Oceanogr 11:1443–1451. doi:10.1175/1520-0485(1981)011<1443:POVMIN>2.0.CO;2
Perez RC, Kessler WS (2009) Three-dimensional structure of tropical cells in the central equatorial pacific ocean*. J Phys Oceanogr 39:27–49. doi:10.1175/2008JPO4029.1
Philip SY, van Oldenborgh GJ (2006) Shifts in ENSO coupling processes under global warming. Geophys Res Lett 33:1–5. doi:10.1029/2006GL026196
Picaut J, Delcroix T (1995) Equatorial wave sequence associated with warm pool displacements during the 1986–1989 El Niño-La Niña. J Geophys Res 100:18393
Picaut J, Ioualalen M, Menkes C et al (1996) Mechanism of the zonal displacements of the Pacific warm pool: implications for ENSO. Science 274:1486–1489
Picaut J, Masia F, duPenhoat Y (1997) An advective-reflective conceptual model for the oscillatory nature of the ENSO. Science 277:663–666. doi:10.1126/science.277.5326.663
Rasmusson EM, Carpenter TH (1982) Variations in tropical sea surface temperature and surface wind fields associated with the southern oscillation/El Niño. Mon Weather Rev 110:354–384. doi:10.1175/1520-0493(1982)110<0354:VITSST>2.0.CO;2
Suarez MJ, Schopf PS (1988) A delayed action oscillator for ENSO. J Atmos Sci 45:3283–3287. doi:10.1175/1520-0469(1988)045<3283:ADAOFE>2.0.CO;2
Trenberth KE, Caron JM (2001) Estimates of meridional atmosphere and ocean heat transports. J Clim 14:3433–3443. doi:10.1175/1520-0442(2001)014<3433:EOMAAO>2.0.CO;2
Vecchi GA, Soden BJ (2007) Global warming and the weakening of the tropical circulation. J Clim 20:4316–4340. doi:10.1175/JCLI4258.1
Vecchi GA, Wittenberg AT (2010) El Niño and our future climate: where do we stand? Wiley Interdiscip Rev Clim Chang 1:260–270. doi:10.1002/wcc.33
Wang W, McPhaden MJ (2000) The surface-layer heat balance in the equatorial Pacific Ocean. Part II: interannual variability*. J Phys Oceanogr 30:2989–3008. doi:10.1175/1520-0485(2001)031<2989:TSLHBI>2.0.CO;2
Wang W, McPhaden MJ (2001) Surface layer temperature balance in the equatorial Pacific during the 1997–98 El Niño and 1998-99 La Niña. J Clim 14:3393–3407. doi:10.1175/1520-0442(2001)014<3393:SLTBIT>2.0.CO;2
Wang C, Picaut J, (2004) Understanding Enso Physics—A Review, in Earth's Climate. In: Wang C, Xie SP, Carton JA (eds) American Geophysical Union, Washington, DC. doi:10.1029/147GM02
Wang C, Weisberg RH (1994) On the “slow mode” mechanism in the ENSO-related coupled ocean- atmosphere models. J Clim 7:1657–1667
Wang B, Zhang Q (2002) Pacific-East Asian teleconnection. Part II: how the Philippine Sea Anomalous anticyclone is established during El Niño development*. J Clim 15:3252–3265. doi:10.1175/1520-0442(2002)015<3252:PEATPI>2.0.CO;2
Weisberg RH, Wang C (1997) Slow variability in the equatorial West-Central Pacific in relation to ENSO. J Clim 10:1998–2017. doi:10.1175/1520-0442(1997)010<1998:SVITEW>2.0.CO;2
Xie S-P, Deser C, Vecchi GA et al (2010) Global warming pattern formation: sea surface temperature and rainfall*. J Clim 23:966–986. doi:10.1175/2009JCLI3329.1
Yang H, Wang F, Sun A (2009) Understanding the ocean temperature change in global warming: the tropical Pacific. Tellus A 61:371–380. doi:10.1111/j.1600-0870.2009.00390.x
Zebiak SE, Cane MA (1987) A model El Niño-Southern oscillation. Mon Weather Rev 115:2262–2278. doi:10.1175/1520-0493(1987)115<2262:AMENO>2.0.CO;2
Zelle H, Jan van Oldenborgh G, Burgers G, Dijkstra H (2005) El Niño and greenhouse warming: results from ensemble simulations with the NCAR CCSM. J Clim 18:4669–4683. doi:10.1175/JCLI3574.1
Zhang Y, Wallace JM, Battisti DS (1997) ENSO-like interdecadal variability: 1900–93. J Clim 10:1004–1020. doi:10.1175/1520-0442(1997)010<1004:ELIV>2.0.CO;2
Zhang Q, Kumar A, Xue Y et al (2007) Analysis of the ENSO cycle in the NCEP coupled forecast model. J Clim 20:1265–1284. doi:10.1175/JCLI4062.1
Zhang Q, Guan Y, Yang H (2008) ENSO amplitude change in observation and coupled models. Adv Atmos Sci 25:361–366. doi:10.1007/s00376-008-0361-5
Acknowledgments
This work is supported by NSFC (41376009 & 41221063), NSF (AGS-1249173 & AGS-1249145), and the Joint Program of Shandong Province and National Natural Science Foundation of China (Grant No. U1406401). Y. Luo would also like to acknowledge the support from the Zhufeng and Taishan Projects of the Ocean University of China. J. Lu is supported by the Office of Science of the U.S. Department of Energy as part of Regional and Global Climate Modeling program.
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Liu, F., Luo, Y., Lu, J. et al. Response of the tropical Pacific Ocean to El Niño versus global warming. Clim Dyn 48, 935–956 (2017). https://doi.org/10.1007/s00382-016-3119-2
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DOI: https://doi.org/10.1007/s00382-016-3119-2