mirage

Combination of geodetic observations and models for glacial isostatic adjustment fields in fennoscandia.

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

Combination of geodetic observations and models for glacial isostatic adjustment fields in fennoscandia.

Show full item record

Title: Combination of geodetic observations and models for glacial isostatic adjustment fields in fennoscandia.
Author: Hill, Emma M.; Davis, James L.; Tamisiea, Mark E.; Lidberg, Martin.
Copyright year: 2010
Abstract: We demonstrate a new technique for using geodetic data to update a priori predictions for Glacial Isostatic Adjustment (GIA) in the Fennoscandia region. Global Positioning System (GPS), tide gauge, and Gravity Recovery and Climate Experiment (GRACE) gravity rates are assimilated into our model. The technique allows us to investigate the individual contributions from these data sets to the output GIA model in a self-consistent manner. Another benefit of the technique is that we are able to estimate uncertainties for the output model. These are reduced with each data set assimilated. Any uncertainties in the GPS reference frame are absorbed by reference frame adjustments that are estimated as part of the assimilation. Our updated model shows a spatial pattern and magnitude of peak uplift that is consistent with previous models, but our location of peak uplift is slightly to the east of many of these. We also simultaneously estimate a spatially averaged rate of local sea level rise. This regional rate (∼1.5 mm/yr) is consistent for all solutions, regardless of which data sets are assimilated or the magnitude of a priori GPS reference frame constraints. However, this is only the case if a uniform regional gravity rate, probably representing errors in, or unmodeled contributions to, the low-degree harmonic terms from GRACE, is also estimated for the assimilated GRACE data. Our estimated sea level rate is consistent with estimates obtained using a more traditional approach of direct “correction” using collocated GPS and tide gauge sites.
Subject: DRNTU::Science::Geology.
Type: Journal Article
Series/ Journal Title: Journal of geophysical research
Rights: © 2010 by the American Geophysical Union (AGU). This paper was published in Journal of Geophysical Research and is made available as an electronic reprint (preprint) with permission of AGU. The paper can be found at DOI: [http://dx.doi.org/10.1029/2009JB006967]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Version: Published version

Files in this item

Files Size Format View
Combination of ... fields in Fennoscandia.pdf 2.092Mb PDF View/Open
   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics

Total views

All Items Views
Combination of geodetic observations and models for glacial isostatic adjustment fields in fennoscandia. 193

Total downloads

All Bitstreams Views
Combination of geodetic observations and models for glacial isostatic adjustment fields in Fennoscandia.pdf 96

Top country downloads

Country Code Views
United States of America 44
China 12
Singapore 10
Taiwan 10
Unknown Country 2

Top city downloads

city Views
Mountain View 41
Singapore 10
Taipei 5
Beijing 2
Putian 2