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INT-BILAT-BILAT-ordningen

Norsk-Indisk bilateralt samarbeid - Stipendordning for indiske Ph.D.-studenter ved UNIS på Svalbard

Tildelt: kr 8,1 mill.

Teena Chauhan: Late Weichselian ice-sheet dynamics and deglaciation history of the northern and eastern Svalbard margins This PhD project investigates the glacial history and palaeo-oceanography of poorly known northern and eastern Svalbard margins. Sediment cores from the southern Yermak Plateau and the shelf break north of Nordaustlandet have been used to reconstruct the spatial and temporal variability of paleoceanographic conditions and sea ice extent through the glacial-interglacial cycles. These processes are closely linked to the changes in the configuration and dynamics of the former Svalbard-Barents Sea Ice Sheet (SBIS) The results show that * the glacial periods were characterized with open water conditions whereas during interglacial periods sea ice was present on the northern Svalbard margin. * the initial breakup of the last SBIS was associated with the ice rafting events in the North Atlantic at c. 19,000 BP. The second phase occurred due to warmer climate after c. 15,000 BP. * the palaeo-oceanographic and geophysical data demonstrate that the last major ice grounding on the southern Yermak Plateau occurred not during the Late Weichselian but rather at MIS 6. Srikumar Roy: Offshore gas/fluid seeps in Svalbard This project investigates the past and present hydrocarbon seepage in Svalbard by mapping the distribution of pockmarks on the seafloor, studying their link to geological structures, seafloor sediment types and offshore permafrost using marine geological, geophysical and sedimentological data. The results show that: * the spatial distribution of seeps on the seabed is controlled by: (a) underlying potential source rocks, (b) discontinuities in the sedimentary column, such as tectonic structures (normal, thrust, strike slip, transform faults and igneous intrusions) that facilitate the migration of gas/fluids, (c) igneous intrusions in the sedimentary bedrock, and (d) glacial lineations and submarine slides. * the high-resolution subsurface acoustic and seabed backscatter data from some areas in Grønfjorden, Nordfjorden and Inner Isfjorden suggest that gas/fluid accumulation and seepage from pockmarks and through high-amplitude seafloor backscatter patches may presently occur. * the methane hydrate stability zone thickness and extent correlates with high density pockmark zones based on thermo-baric modeling suggesting hydrate dissociation as a potential source for modern gas/fluid seepage in Isfjorden. Archana Meshram The project investigates the baseline diversity and seasonality of arctic marine microbial plankton utilizing high throughput sequencing technology. The preliminary results show an amazing diversity of marine microbes present in the pelagic during the arctic winter, and a high turnover of microbial eukaryotes in the sea ice ecosystem.

Med utgangspunkt i den norsk-indiske bilaterale forskningsavtalen skal det etableres en ph.d. stipendordning for tre indiske studenter ved UNIS på Svalbard. Fagfeltene omfatter miljø/økologi, geologi og nordlys/atmosfære.

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INT-BILAT-BILAT-ordningen