eCite Digital Repository
Sea level rise and land level change at Macquarie Island and deformation of the Australia-Pacific plate boundary zone
Citation
Burgette, RJ, Sea level rise and land level change at Macquarie Island and deformation of the Australia-Pacific plate boundary zone, School of Geography & Environmental Studies Conference Abstracts 2010, 28 June 2010, Sandy Bay (2010) [Conference Extract]
Abstract
Through the combination of rare historical sea level observations collected during Sir Douglas Mawson’s 1911-1914 Australasian Antarctic Expedition, together with modern sea level data, space geodetic estimates of crustal displacement and modeling of coseismic and postseismic earthquake deformation, we present a contemporary analysis to constrain sea level and land level change over the twentieth century at Macquarie Island. We refine the source parameters of the Mw ~8.0 great earthquake of 23 December 2004 using estimates of coseismic displacements at regional GPS sites including HOB2 in Hobart. Modelling four years of post-2004.98 deformation constrains the oceanic upper mantle rheology. The 2000-2005 Macquarie Island GPS vertical velocity of -2.46 ± 0.64 mm/y is explained by ongoing postseismic deformation from Macquarie Ridge great earthquakes of 1989 and 1924. The twentieth century observed relative sea level rise of +4.8 ± 0.6 mm/y is consistent with an absolute sea level rise of +2.0 ± 0.8 mm/y.
Item Details
Item Type: | Conference Extract |
---|---|
Keywords: | Macquarie Island, sea level rise, plate boundaries |
Research Division: | Engineering |
Research Group: | Geomatic engineering |
Research Field: | Photogrammetry and remote sensing |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the environmental sciences |
UTAS Author: | Burgette, RJ (Dr Reed Burgette) |
ID Code: | 65545 |
Year Published: | 2010 |
Deposited By: | Geography and Environmental Studies |
Deposited On: | 2010-11-22 |
Last Modified: | 2010-11-22 |
Downloads: | 0 |
Repository Staff Only: item control page