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| Titel |
Evolution of the Asian monsoon from the Cretaceous to the modern - a modelling study. |
| VerfasserIn |
Dan Lunt, Alex Farnsworth, Claire Loptson, Paul Markwick |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250093210
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| Publikation (Nr.) |
 EGU/EGU2014-7735.pdf |
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| Zusammenfassung |
| It has long been suggested that palaeogeography could have an important role in the
modulation of the Asian monsoon. In particular, orogenesis associated with the Himalayas
and Tibetan Plateau has been associated with the intensification of the Asian monsoon
through the Neogene, a paradigm which has some support from both data and modelling
studies.
Here we go further by considering the evolution of the Asian monsoon over a
much longer time period than ususally considered, namely, the early Cretaceous
right through to the modern day. Through a series of more than 30 climate model
simulations spanning 150 million years, we investigate how changing palaeogeography
(continental distribution, mountain height, and bathymetry) has affected monsoon
evolution.
The palaeogeographies are provided by Getech Plc, and we use the HadCM3L climate
model, developed by the UK Met Office. All simulations are run for more than 500 years
from an identical initial state.
We show that a monsoon system has existed in the western Pacific and Indian Ocean since
the early Cretaceous, but that intense precipitation only began to penetrate onto the east Asian
continent in the late Paleogene and early Eocene.
As well as focussing on the Asian (or proto-Asian for the earliest Cretaceous) monsoon,
we present the results in a global context. |
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