Citation:

qres.1999.2082

Name: Elevation lines of modelled ice sheet extension during last glacial maximum
Published: 1999
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

A numerical ice-sheet model was used to reconstruct the Late Weichselian glaciation of the Eurasian High Arctic, between Franz Josef Land and Severnaya Zemlya. An ice sheet was developed over the entire Eurasian High Arctic so that ice flow from the central Barents and Kara seas toward the northern Russian Arctic could be accounted for. An inverse approach to modeling was utilized, where ice-sheet results were forced to be compatible with geological information indicating ice-free conditions over the Taymyr Peninsula during the Late Weichselian. The model indicates complete glaciation of the Barents and Kara seas and predicts a “maximum-sized” ice sheet for the Late Weichselian Russian High Arctic. In this scenario, full-glacial conditions are characterized by a 1500-m-thick ice mass over the Barents Sea, from which ice flowed to the north and west within several bathymetric troughs as large ice streams. In contrast to this reconstruction, a “minimum” model of glaciation involves restricted glaciation in the Kara Sea, where the ice thickness is only 300 m in the south and which is free of ice in the north across Severnaya Zemlya. Our maximum reconstruction is compatible with geological information that indicates complete glaciation of the Barents Sea. However, geological data from Severnaya Zemlya suggest our minimum model is more relevant further east. This, in turn, implies a strong paleoclimatic gradient to colder and drier conditions eastward across the Eurasian Arctic during the Late Weichselian.

Project(s):

Quaternary Environment of the Eurasian North (QUEEN)

Funding:

Fourth Framework Programme (FP4), grant/award no. MAS3980185 : Quaternary Environment of the Eurasian North

Coverage:

Median Latitude: 65.077425 * Median Longitude: 27.092606 * South-bound Latitude: 51.791100 * West-bound Longitude: -9.965540 * North-bound Latitude: 82.031300 * East-bound Longitude: 104.208000

Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 m

Event(s):

IceExtSiegert1999 * Elevation Start: 0.0 m * Elevation End: 0.0 m * Campaign: * Method/Device: Reconstructed data (RECON)

Comment:

Data digized from graphic/data. stored in GF3-format

Parameter(s):

#	Name	Short Name	Principal Investigator	Method/Device	Comment
1	LATITUDE	Latitude			Geocode
2	LONGITUDE	Longitude			Geocode
3	Ice extent	Ice extent	Dowdeswell, Julian A	modelled

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

4859 data points

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