Asymmetric Response of the Equatorial Pacific SST to Climate Warming and Cooling

AbstractThe response of the equatorial Pacific Ocean to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model (CESM). Results show a strong asymmetry in SST changes. In the eastern equatorial Pacific (EEP), the warming responding to the positive forcing exceeds the cooling response to the negative forcing, whereas in the western equatorial Pacific (WEP) it is the other way around and the cooling surpasses the warming. This leads to a zonal dipole asymmetric structure, with positive values in the east and negative values in the west. A surface heat budget analysis suggests that the SST asymmetry mainly results from the oceanic horizontal advection and vertical entrainment, with both of their linear and nonlinear components playing a role. For the linear component, its change appears to be more significant over the EEP (WEP) in the positive (negative) forcing scenario, favoring the seesaw pattern of the SST asymmetry. For the nonlinear component, its change ...

[1]  Jian Lu,et al.  The Role of Ocean Dynamical Thermostat in Delaying the El Niño–Like Response over the Equatorial Pacific to Climate Warming , 2017 .

[2]  K. Karnauskas,et al.  The Role of Tropical Interbasin SST Gradients in Forcing Walker Circulation Trends , 2017 .

[3]  Xiuquan Wan,et al.  Response of the tropical Pacific Ocean to El Niño versus global warming , 2017, Climate Dynamics.

[4]  Barry A. Klinger,et al.  Ocean Heat Uptake and Interbasin Transport of the Passive and Redistributive Components of Surface Heating , 2016 .

[5]  Shang-Ping Xie,et al.  Intermodel Uncertainty in ENSO Amplitude Change Tied to Pacific Ocean Warming Pattern , 2016 .

[6]  S. Xie,et al.  The tropical Pacific as a key pacemaker of the variable rates of global warming , 2016 .

[7]  Mingcheng Chen,et al.  Relative Roles of Dynamic and Thermodynamic Processes in Causing Evolution Asymmetry between El Niño and La Niña , 2016 .

[8]  Yan Du,et al.  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 , 2016, Climate Dynamics.

[9]  Xiang Li,et al.  Response of North Pacific eastern subtropical mode water to greenhouse gas versus aerosol forcing , 2016, Advances in Atmospheric Sciences.

[10]  A. Timmermann,et al.  ENSO and greenhouse warming , 2015 .

[11]  Jian Lu,et al.  Understanding the El Niño-like oceanic response in the tropical Pacific to global warming , 2015, Climate Dynamics.

[12]  Tim Li,et al.  A Simple Analytical Model for Understanding the Formation of Sea Surface Temperature Patterns under Global Warming , 2014 .

[13]  Tao Zhang,et al.  ENSO Asymmetry in CMIP5 Models , 2014 .

[14]  E. Guilyardi,et al.  Late-twentieth-century emergence of the El Niño propagation asymmetry and future projections , 2013, Nature.

[15]  S. Xie,et al.  Similar spatial patterns of climate responses to aerosol and greenhouse gas changes , 2013 .

[16]  Yu Kosaka,et al.  Recent global-warming hiatus tied to equatorial Pacific surface cooling , 2013, Nature.

[17]  S. Xie,et al.  Response of mode water and Subtropical Countercurrent to greenhouse gas and aerosol forcing in the North Pacific , 2013, Journal of Ocean University of China.

[18]  Dietmar Dommenget,et al.  Analysis of the non-linearity in the pattern and time evolution of El Niño southern oscillation , 2013, Climate Dynamics.

[19]  Bin Zhao,et al.  The Role of Oceanic Feedback in the Climate Response to Doubling CO2 , 2012 .

[20]  G. Vecchi,et al.  Mean Climate Controls on the Simulated Response of ENSO to Increasing Greenhouse Gases , 2012 .

[21]  G. Vallis,et al.  The passive and active nature of ocean heat uptake in idealized climate change experiments , 2012, Climate Dynamics.

[22]  C. Deser,et al.  A Proposed Mechanism for the Asymmetric Duration of El Niño and La Niña , 2011 .

[23]  C. Deser,et al.  Asymmetry in the Duration of El Niño and La Niña , 2010 .

[24]  Arun Kumar,et al.  The NCEP GODAS Ocean Analysis of the Tropical Pacific Mixed Layer Heat Budget on Seasonal to Interannual Time Scales , 2010 .

[25]  A. Timmermann,et al.  The impact of global warming on the tropical Pacific Ocean and El Niño , 2010 .

[26]  Andrew T. Wittenberg,et al.  El Niño and our future climate: where do we stand? , 2010 .

[27]  C. Deser,et al.  Global warming pattern formation: sea surface temperature and rainfall. , 2010 .

[28]  Rong‐Hua Zhang,et al.  Response of Pacific subtropical‐tropical thermocline water pathways and transports to global warming , 2009 .

[29]  Understanding the ocean temperature change in global warming: the tropical Pacific , 2009 .

[30]  S. Xie.  OCEAN-ATMOSPHERE INTERACTION AND TROPICAL CLIMATE , 2009 .

[31]  S. Xie,et al.  Muted precipitation increase in global warming simulations: A surface evaporation perspective , 2008 .

[32]  Lu Wang,et al.  Estimating the nonlinear response of tropical ocean to extratropical forcing in a coupled climate model , 2008 .

[33]  S. An.  Interannual Variations of the Tropical Ocean Instability Wave and ENSO , 2008 .

[34]  G. Vecchi,et al.  Examining the Tropical Pacific's Response to Global Warming , 2008 .

[35]  B. Soden,et al.  Robust Responses of the Hydrological Cycle to Global Warming , 2006 .

[36]  P. Sardeshmukh,et al.  Sensitivity of global warming to the pattern of tropical ocean warming , 2006 .

[37]  S. Vavrus,et al.  Rethinking Tropical Ocean Response to Global Warming: The Enhanced Equatorial Warming* , 2005 .

[38]  Eli Tziperman,et al.  Westerly Wind Bursts: ENSO's tail rather than the dog? , 2004 .

[39]  Fei-Fei Jin,et al.  Nonlinearity and Asymmetry of ENSO(. , 2004 .

[40]  A. Timmermann,et al.  Strong El Niño events and nonlinear dynamical heating , 2003 .

[41]  W. Kessler,et al.  Is ENSO a cycle or a series of events? , 2002 .

[42]  Axel Timmermann,et al.  Phytoplankton influences on tropical climate , 2002 .

[43]  I. Kang,et al.  El Niño and La Niña sea surface temperature anomalies: Asymmetry characteristics associated with their wind stress anomalies , 2002 .

[44]  Min Zhong,et al.  El Niño, La Niña, and the Nonlinearity of Their Teleconnections , 1997 .

[45]  E. Schneider,et al.  A Tropical Influence on Global Climate , 1997 .

[46]  S. Manabe,et al.  Time-Mean Response over the Tropical Pacific to Increased C02 in a Coupled Ocean-Atmosphere Model , 1995 .

[47]  J. Wallace,et al.  The Annual Cycle in Equatorial Convection and Sea Surface Temperature , 1992 .

[48]  Syukuro Manabe,et al.  Transient responses of a coupled ocean-atmosphere model to gradual changes of atmospheric CO2 , 1991 .

[49]  Pearn P. Niiler,et al.  Upper Ocean Heat Budget During the Hawaii-to-Tahiti Shuttle Experiment , 1983 .

[50]  R. Pacanowski,et al.  Parameterization of Vertical Mixing in Numerical Models of Tropical Oceans , 1981 .