Abstract
A newly developed Atmospheric General Circulation Model (AGCM) at T62 spectral truncation with 28 terrain-following (σ = p/ps) levels coupled to the Modular Ocean Model version 3.0 (MOM3.0) is evaluated for its simulation of El Niño and the Southern Oscillation (ENSO). It is also compared with an older version of the AGCM coupled to the same ocean model. A dozen features of ENSO are validated. These characteristics of ENSO highlight its influence on global climate at seasonal to interannual scales. The major improvements of the ENSO simulation from this new coupled climate model are the seasonal phase locking of the ENSO variability to a realistic annual cycle of the eastern equatorial Pacific Ocean, the duration of the ENSO events and its evolution that is comparable to the ocean data assimilation. The two apparent drawbacks of this new model are its relatively weak ENSO variability and the presence of erroneous split ITCZ. The improvement of the ENSO simulation in the new coupled model is attributed to realistic thermocline variability and wind stress simulation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 292-308 |
| Number of pages | 17 |
| Journal | Tellus, Series A: Dynamic Meteorology and Oceanography |
| Volume | 59 |
| Issue number | 3 |
| DOIs | |
| State | Published - May 2007 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Atmospheric Science
- Oceanography
Cite this
Validating and understanding the ENSO simulation in two coupled climate models. / Misra, Vasubandhu; Marx, Larry; Kinter, James L.; Kirtman, Benjamin; Guo, Zhichang; Min, Dughong; Fennessy, Mike; Dirmeyer, Paul A.; Kallummal, Rameshan; Straus, David M.
In: Tellus, Series A: Dynamic Meteorology and Oceanography, Vol. 59, No. 3, 05.2007, p. 292-308.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Validating and understanding the ENSO simulation in two coupled climate models
AU - Misra, Vasubandhu
AU - Marx, Larry
AU - Kinter, James L.
AU - Kirtman, Benjamin
AU - Guo, Zhichang
AU - Min, Dughong
AU - Fennessy, Mike
AU - Dirmeyer, Paul A.
AU - Kallummal, Rameshan
AU - Straus, David M.
PY - 2007/5
Y1 - 2007/5
N2 - A newly developed Atmospheric General Circulation Model (AGCM) at T62 spectral truncation with 28 terrain-following (σ = p/ps) levels coupled to the Modular Ocean Model version 3.0 (MOM3.0) is evaluated for its simulation of El Niño and the Southern Oscillation (ENSO). It is also compared with an older version of the AGCM coupled to the same ocean model. A dozen features of ENSO are validated. These characteristics of ENSO highlight its influence on global climate at seasonal to interannual scales. The major improvements of the ENSO simulation from this new coupled climate model are the seasonal phase locking of the ENSO variability to a realistic annual cycle of the eastern equatorial Pacific Ocean, the duration of the ENSO events and its evolution that is comparable to the ocean data assimilation. The two apparent drawbacks of this new model are its relatively weak ENSO variability and the presence of erroneous split ITCZ. The improvement of the ENSO simulation in the new coupled model is attributed to realistic thermocline variability and wind stress simulation.
AB - A newly developed Atmospheric General Circulation Model (AGCM) at T62 spectral truncation with 28 terrain-following (σ = p/ps) levels coupled to the Modular Ocean Model version 3.0 (MOM3.0) is evaluated for its simulation of El Niño and the Southern Oscillation (ENSO). It is also compared with an older version of the AGCM coupled to the same ocean model. A dozen features of ENSO are validated. These characteristics of ENSO highlight its influence on global climate at seasonal to interannual scales. The major improvements of the ENSO simulation from this new coupled climate model are the seasonal phase locking of the ENSO variability to a realistic annual cycle of the eastern equatorial Pacific Ocean, the duration of the ENSO events and its evolution that is comparable to the ocean data assimilation. The two apparent drawbacks of this new model are its relatively weak ENSO variability and the presence of erroneous split ITCZ. The improvement of the ENSO simulation in the new coupled model is attributed to realistic thermocline variability and wind stress simulation.
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UR - http://www.scopus.com/inward/citedby.url?scp=34247222125&partnerID=8YFLogxK
U2 - 10.1111/j.1600-0870.2007.00231.x
DO - 10.1111/j.1600-0870.2007.00231.x
M3 - Article
AN - SCOPUS:34247222125
VL - 59
SP - 292
EP - 308
JO - Tellus, Series A: Dynamic Meteorology and Oceanography
JF - Tellus, Series A: Dynamic Meteorology and Oceanography
SN - 0280-6495
IS - 3
ER -