Applying a remote sensing and GIS approach to reconstructing the last Newfoundland Ice Sheet, Canada.

M. T. McHenry, P Dunlop

Research output: Contribution to conferencePoster

Abstract

Applying a remote sensing and GIS approach to reconstructing the last Newfoundland Ice Sheet, Canada. The Newfoundland Ice Sheet (NIS) was situated on the margins of the northwest Atlantic Ocean and the Laurentide Ice Sheet (LIS) during the last glaciation. This location suggests the evolution of the NIS through the last glacial cycle was likely influenced by a number of external and internal drivers including configuration changes in the LIS, ice stream initiation and shutdown, changes in oceanic circulation and fluctuating sea levels and climate signals from the wider Amphi-North Atlantic. As such Newfoundland is a key location for investigating ice sheet response to a number of internal and external forcing mechanisms. An established technique for reconstructing former ice sheets is to use a remote sensing approach to map the glacial geomorphology. The spatial analysis of this record can be used to decipher the dynamics, extent, retreat patterns and configuration of former ice sheets throughout the ice sheet evolution. Here we present new mapping based on our interpretation of SPOT satellite imagery and Digital Elevation Models of Newfoundland as well as swath bathymetric imagery from several locations offshore. Our new database consisting of ~150,000 individually mapped subglacial bedforms that includes glacial lineations and ribbed moraines significantly increases the known landform record in this region. Here we report how this data is being used to reconstruct the former NIS using the glacial inversion approach and flowset analysis to separate discrete ice flow patterns into snapshots of ice sheet behaviour through time.
Original languageEnglish
Number of pages1
Publication statusPublished - 21 May 2015
Event47th Conference of Irish Geographers - Queen's University Belfast, Belfast, United Kingdom
Duration: 21 May 201524 May 2015

Conference

Conference47th Conference of Irish Geographers
Abbreviated titleCIG
CountryUnited Kingdom
CityBelfast
Period21/05/1524/05/15

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  • Cite this

    McHenry, M. T., & Dunlop, P. (2015). Applying a remote sensing and GIS approach to reconstructing the last Newfoundland Ice Sheet, Canada.. Poster session presented at 47th Conference of Irish Geographers, Belfast, United Kingdom.