SST Simulations From HYCOM in the Equatorial Pacific Ocean During ENSO Events Since 1990
Abstract
A 0.72 degree HYbrid Coordinate Ocean Model (HYCOM) is set up for the Equatorial Pacific and used for predictions of sea surface temperature durin El Nino and La Nina events from 1990 to 2003. The model domain spans 30N-30S in latitude and 70W to 110E in longitude, and the latitudinal resolution is increased to 0.36 degrees near the equator to improve model's equatorial dynamics. Model simulations are performed using high resolution (6 hourly) atmospheric forcing from European Centre for Medium-Range Weather Forecasts~(ECMWF). Model simulations include no assimilation of any SST data, and there is no relaxation to any SST climatology. Performance of HYCOM in predicting daily SST is examined using five different mixed layer models: (1) K--Profile Parameterization (KPP), (2) Goddard Institute for Space Studies (GISS) model, (3) Mellor-Yamada 2.5 turbulence closure (MY2.5), (4) Kraus-Turner (KT) model, and (5) Price-Weller-Pinkel (PWP) model. SST simulations from HYCOM are validated against those from moored buoy observations in the equatorial Pacific using various statistical metrics.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2005
- Bibcode:
- 2005AGUSMOS51A..04K
- Keywords:
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- 4255 Numerical modeling;
- 4263 Ocean prediction;
- 4504 Air/sea interactions (0312);
- 4522 El Niño;
- 4568 Turbulence;
- diffusion;
- and mixing processes;
- 4522 El Niño