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| Titel |
High frequency fluctuations in the heat content of an ocean general circulation model |
| VerfasserIn |
A. M. Huerta-Casas, D. J. Webb |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 8, no. 5 ; Nr. 8, no. 5 (2012-09-27), S.813-825 |
| Datensatznummer |
250005871
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| Publikation (Nr.) |
 copernicus.org/os-8-813-2012.pdf |
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| Zusammenfassung |
The transport and storage of heat by the ocean is of crucial
importance because of its effect on ocean dynamics and its impact on the
atmosphere, climate and climate change. Unfortunately, limits to the amount
of data that can be collected and stored mean that many experimental and
modelling studies of the heat budget have to make use of mean datasets where
the effects of short term fluctuations are lost.
In this paper we investigate the magnitude of the resulting errors by making use
of data from OCCAM, a high resolution global ocean model. The model carries
out a proper heat balance every time step so any imbalances that are found in
the analysis must result from the use of mean fields.
The study concentrates on two areas of the ocean affecting the El Nino. The
first is the region of tropical instability waves north of the Equator. The
second is in the upwelling region along the Equator.
It is shown that in both cases, processes with a period of less than
five days can have a significant impact on the heat budget. Thus, analyses
using data averaged over five days or more are likely to have significant
errors. It is also shown that if a series of instantaneous values
is available, reasonable estimates can be made of the size of the
errors. In model studies, such values are available in the form of
the datasets used to restart the model. In experimental studies they
may be in the form of individual unaveraged observations. |
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