This session will focus on the development of the gateway between the Pacific and Indian Oceans in the geological past. Contributions are invited that address tectonic processes and sea level changes in the Indonesian-Throughflow-sensitive regions, development of the Western Pacific Warm Pool, and splitting of main currents in the Indonesian Seas.

Several high-resolution cores have been retrieved from the region of Austral- and Southeast-Asia. These cores are allowing observation of climatic and oceanographic changes to be deciphered on decadal to millenial timescales over periods ranging from 10,000 to about 400,000 years. In conjunction with records of numerous associated or independent proxies, such observations are important on many levels. They permit links to be drawn between climate variations and ecosystem shifts; they illustrate variability in water mass distribution and structure in the ocean; they contribute to the construction of global-scale climate records and the understanding of the relationships between climate forcing and effects; and they yield insight into the magnitude and direction of exchange of climatically important gases between ocean and atmosphere.

Contributions addressing the importance of significant regional anomalies on hemispheric and global scale climate are specifically welcome. Examples include, but are not limited to the different spatial and temporal time scales of significant events of the last glacial period and the Holocene, how they are expressed in proxy and model data, the temporal coherence with spatial forcing fingerprints as well as additivity characteristics of individual forcing components, and identification of previously underestimated factors. Contributions based on paleoclimate proxy or instrumental records that document the temporal and/or spatial extent of rapid climate changes are also encouraged. Contributions are invited which may, for the geological past, give evidence that the Indian Ocean has its own coupled mode of variability that is weak on its own but grows under the influence of external forcings from the Pacific Ocean.

It is also anticipated that abstracts will be submitted to the proposed session that present, for the distant and recent past, high-resolution reconstructions of changes in the regions. These abstracts may, for example, focus on patterns of heat transport and transport variability of the Indonesian Throughflow and the role of remote wind forcing. Furthermore, studies are invited which show how the Indian Ocean-Monsoon system can modulate the amplitude the frequency of ENSO and produce interdecadal variations. Contributions based on model simulations that investigate the causes of these events, including thresholds or feedbacks in the climate system, are also encouraged.

If you are interested in participating in this session, Please contact :
Dr. Anne Müller
UFZ Centre for Environmental Research Halle-Leipzig Ltd.
Brueckstr. 3a
D-39114 Magdeburg
Germany
Email: [email protected]


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