PC33A:
El Niño–Southern Oscillation (ENSO) Diversity in a Changing Climate II


Session ID#: 11497

Session Description:
ENSO events differ in amplitude, spatial pattern, and temporal evolution. These event-to-event variations are difficult to predict and can result in markedly different global impacts. Moreover, tropical Pacific interannual variability appears to undergo decadal/interdecadal variations, which may obscure the detection of possible ENSO changes associated with global warming. In this session we welcome contributions that target the US CLIVAR goal of advancing our understanding of the origin, dynamics, impacts, and predictability of all aspects of ENSO diversity in a changing climate, using observations, theory, model simulations, as well as paleoclimate reconstructions. The unusual evolution of the 2014-2015 El Niño is a recent example of this diversity, and studies aimed at elucidating the physical processes underlying that event are strongly encouraged. We also welcome studies that clarify how model biases contribute to the diversity of ENSO representation among model simulations of past, present, and future climates, as well as research into how to reduce or otherwise cope with those biases.
Primary Chair:  Antonietta Capotondi, NOAA /ESRL, Physical Sciences Division, Boulder, CO, United States; University of Colorado, CIRES, Boulder, CO, United States
Chairs:  Michael J McPhaden, NOAA Seattle, Seattle, WA, United States and Andrew Thorne Wittenberg, NOAA Princeton, Princeton, NJ, United States
Moderators:  Michael J McPhaden, NOAA Seattle, Seattle, WA, United States, Antonietta Capotondi, NOAA /ESRL, Physical Sciences Division, Boulder, CO, United States and Andrew Thorne Wittenberg, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Student Paper Review Liaisons:  Antonietta Capotondi, NOAA /ESRL, Physical Sciences Division, Boulder, CO, United States and Andrew Thorne Wittenberg, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
4522 ENSO [OCEANOGRAPHY: PHYSICAL]
Co-Sponsor(s):
  • A - Air-sea Interactions and Upper Ocean Processes
  • HI - Human Use and Impacts
  • PO - Physical Oceanography/Ocean Circulation
  • TE - Tropical and Equatorial Environments

Abstracts Submitted to this Session:

PC33A-01
ENSO in a Flux-Adjusted Coupled GCM (89968)
Andrew Thorne Wittenberg1, Gabriel Andres Vecchi1, Thomas L Delworth1, Anthony John Rosati1 and Fanrong Jenny Zeng2, (1)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (2)NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
PC33A-03
Atmospheric Feedbacks in the ENSO cycle and the Role of the Hydrological Cycle (89752)
Matthew Collins, University of Exeter, Exeter, United Kingdom and Samantha Ferrett, University of Exeter, Exeter, EX4, United Kingdom
PC33A-04
Central tropical Pacific corals constrain anthropogenic influence on recent ENSO extremes (88820)
Pamela R Grothe1, Kim M Cobb1, R. Lawrence Edwards2, Hai Cheng3, Daniel Deocampo4, John Richard Southon5, Guaciara Santos6, Yanbin Lu7, Giovanni Liguori8 and Antonietta Capotondi9, (1)Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, (2)University of Minnesota, Minneapolis, MN, United States, (3)Xi'an Jiaotong University, Institute of Global Environmental Change, Xian, China, (4)Georgia State University, Atlanta, GA, United States, (5)Univ California, Irvine, CA, United States, (6)University of California Irvine, Irvine, CA, United States, (7)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, (8)Georgia Institute of Technology, School of Earth & Atmospheric Sciences, Atlanta, GA, United States, (9)NOAA /ESRL, Physical Sciences Division, Boulder, CO, United States
PC33A-05
Externally Forced ENSO Diversity Changes in CESM: From the Last Millennium to the 21st Century (88274)
Samantha Stevenson1, Antonietta Capotondi2, Bette L Otto-Bliesner3 and John Fasullo1, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)NOAA /ESRL, Physical Sciences Division, Boulder, CO, United States, (3)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States
PC33A-06
Changes in ENSO amplitude under global warming in CESM Large Ensemble project: the uncertainty due to internal variability (93281)
Xiao-Tong Zheng1, Shang-Ping Xie2,3 and Chang Hui1, (1)Ocean University of China, College of Oceanic and Atmospheric Sciences, Qingdao, China, (2)Scripps Institution of Oceanography, La Jolla, CA, United States, (3)Ocean University of China, Qingdao, China
PC33A-07
The Early-1990s Climate Shift and the ENSO Diversity (87506)
Jin-Yi Yu and Houk Paek, University of California Irvine, Department of Earth System Science, Irvine, CA, United States
PC33A-08
The role of the Meridional Mode in ENSO diversity under greenhouse forcing (93025)
Giovanni Liguori, Georgia Institute of Technology Main Campus, Atlanta, GA, United States and Emanuele Di Lorenzo, Georgia Institute of Technology Main Campus, Program in Ocean Science & Engineering, Atlanta, GA, United States
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