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Dynamics of simulated Atlantic upwelling annual cycle in CMIP5 models

Journal Article · · Journal of Geophysical Research. Oceans
DOI:https://doi.org/10.1002/2017JC012781· OSTI ID:1474276
 [1];  [2];  [3]
  1. National Taiwan Normal Univ., Taipei (Taiwan); Department of Atmospheric Sciences, University of Hawaii at Manoa, Honolulu Hawaii
  2. Univ. of Hawaii at Manoa, Honolulu, HI (United States)
  3. National Taiwan Normal Univ., Taipei (Taiwan)
As one of the prominent climatic component of tropical climate system, the annual cycle of the equatorial Atlantic cold tongue region has been a subject of significant research. In this work, we examine the fidelity of the key part of the annual cycles, namely, the upwelling annual cycles, from the simulations of the Coupled Model Intercomparison Project Phase 5 (CMIP5). Utilizing the simple framework we have recently developed based on the Zebiak–Cane (ZC) ocean model, we first tested the validity of the simple framework of upwelling as a combination of the local wind–driven Ekman upwelling and nonlocal wind–driven wave upwelling. It is demonstrated that the theoretically reconstructed upwelling annual cycles to large extent are in good agreement with the simulations in these coupled climatic models. Comparing with observations, we show that the semiannual component of the upwelling is systematically too strong. This significant bias is attributable to the dynamic amplification to the wind–driven wave upwelling originated from a less significant bias in the semiannual harmonic component in the central equatorial wind field. The latter is dynamically amplified in the wind–driven wave upwelling owing to its relatively fast time scale. Furthermore, the realistic simulations of equatorial annual cycles may sensitively depend on good simulations of the semiannual harmonic components in equatorial wind fields.
Research Organization:
Univ. of Hawaii at Manoa, Honolulu, HI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0005110
OSTI ID:
1474276
Alternate ID(s):
OSTI ID: 1377940
Journal Information:
Journal of Geophysical Research. Oceans, Journal Name: Journal of Geophysical Research. Oceans Journal Issue: 7 Vol. 122; ISSN 2169-9275
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

References (24)

Dynamics of upwelling annual cycle in the equatorial Atlantic Ocean: Upwelling Annual Cycle journal April 2017
Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3: INTERANNUAL VARIABILITY OF NEC TRANSPORT journal March 2013
On the origin of equatorial Atlantic biases in coupled general circulation models journal January 2008
Recent and future sea surface temperature trends in tropical pacific warm pool and cold tongue regions journal June 2011
Equatorial Atlantic variability and its relation to mean state biases in CMIP5 journal December 2012
Are atmospheric biases responsible for the tropical Atlantic SST biases in the CNRM-CM5 coupled model? journal January 2014
Seasonal and interannual variability of ocean color and composition of phytoplankton communities in the North Atlantic, equatorial Pacific and South Pacific journal January 2004
Varied representation of the Atlantic Meridional Overturning across multidecadal ocean reanalyses journal September 2011
Historical reconstruction of the Atlantic Meridional Overturning Circulation from the ECMWF operational ocean reanalysis: RECONSTRUCTION OF THE ATLANTIC MOC journal December 2007
Origins of tropical-wide SST biases in CMIP multi-model ensembles: TROPICAL-WIDE SST BIASES IN MODELS journal November 2012
Eastern Pacific tropical cyclones intensified by El Niño delivery of subsurface ocean heat journal December 2014
Thermodynamic controls of the Atlantic Niño journal November 2015
Tropical Ocean-Atmosphere Interaction, the Pacific Cold Tongue, and the El Nino-Southern Oscillation journal October 1996
An Ocean Dynamical Thermostat journal September 1996
An Equatorial Ocean Recharge Paradigm for ENSO. Part I: Conceptual Model journal April 1997
On the Annual Cycle of Equatorial Upwelling in the Central Atlantic Ocean journal January 1991
A Model El Niñ–Southern Oscillation journal October 1987
Development of a Coupled Regional Model and Its Application to the Study of Interactions between the West African Monsoon and the Eastern Tropical Atlantic Ocean journal May 2009
The ECMWF Ocean Analysis System: ORA-S3 journal August 2008
An Overview of CMIP5 and the Experiment Design journal April 2012
Mean and Variability of the Tropical Atlantic Ocean in the CCSM4 journal July 2012
Tropical Atlantic Biases in CCSM4 journal June 2012
An Equatorial–Extratropical Dipole Structure of the Atlantic Niño journal October 2016
Interdecadal Sea Surface Temperature Variability in the Equatorial Pacific Ocean. Part I: The Role of Off-Equatorial Wind Stresses and Oceanic Rossby Waves journal June 2007

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