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An evaluation of the National Meteorological Center weekly hindcast of upper-ocean temperature along the eastern Pacific equator in January 1992The upper-ocean temperature distribution along the Pacific equator from 139 to 103 deg W was observed in January 1992 with temperature profiles recorded from a ship and inferred from an ocean general circulation model calculation involving data assimilation (i.e., hindcast). An El Nino episode was in progress. The l00-m-thick mixed layer depth, the mixed-layer temperature, and the depth-averaged temperature below the thermocline were similar in both data products. Considerable differences occurred in the representation of the 15-25 C thermocline, such as the depth-averaged temperatures above and below the 20 C isotherm, the east-west slope of the 20 C isotherm, and a 1000-km-wide depression. The longitudinal-averaged root-mean-square difference between the hindcast and observed depths of the center of the thermocline was 17 m. Most of the disparities could be attributed to a high wavenumber transient event that the model-based assimilation system was not intended to resolve.
Document ID
19930064894
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Halpern, David
(JPL Pasadena, CA, United States)
Ji, Ming
(NOAA, National Meteorological Center Washington, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: Journal of Climate
Volume: 6
Issue: 6
ISSN: 0894-8755
Subject Category
Oceanography
Accession Number
93A48891
Funding Number(s)
PROJECT: RTOP 578-22-26
Distribution Limits
Public
Copyright
Other

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