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| Titel |
Monsoon response to changes in Earth's orbital parameters: comparisons between simulations of the Eemian and of the Holocene |
| VerfasserIn |
P. Braconnot, C. Marzin, L. Grégoire, E. Mosquet, O. Marti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 4, no. 4 ; Nr. 4, no. 4 (2008-11-24), S.281-294 |
| Datensatznummer |
250001869
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| Publikation (Nr.) |
 copernicus.org/cp-4-281-2008.pdf |
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| Zusammenfassung |
| Monsoon is the major manifestation of the seasonal cycle in the tropical
regions, and there is a wide range of evidence from marine and terrestrial
data that monsoon characteristics are affected by changes in the Earth's
orbital parameters. We consider 3 periods in the Eemian and 3 in the
Holocene that present some analogy in the Earth's orbital configuration in
terms of obliquity and precession. Simulations with the IPSL_CM4
ocean-atmosphere coupled model allow us to discuss the response of the
Indian and African monsoon in terms of amplitude and response to the
insolation forcing. Results show that precession plays a large role in
shaping the seasonal timing of the monsoon system. Differences are found in
the response of the two sub-systems. They result from the phase relationship
between the insolation forcing and the seasonal characteristics of each
sub-system. Also the response of the Indian Ocean is very different in terms
of temperature and salinity when the change in insolation occurs at the
summer solstice or later in the year. Monsoon has a large contribution to
heat and water transports. It is shown that the relative importance of
monsoon on the change in the energetic of the tropical regions also vary
with precession. |
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