de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Contact usLogin
  Advanced SearchBrowse

Item


Report

Released

A reanalysis and reinterpretation of geodetic and geological evidence of glacial-isostatic adjustment in the Churchill region, Hudson Bay

Wolf, D., Klemann, V., Wünsch, J., Zhang, F.-P. (2004): A reanalysis and reinterpretation of geodetic and geological evidence of glacial-isostatic adjustment in the Churchill region, Hudson Bay, (Scientific Technical Report STR ; 04/11), Potsdam : Deutsches GeoForschungsZentrum GFZ, 49 S.  p.



http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:8642
Resources

0411.pdf
(Publisher version), 2MB

Authors

Wolf ,  Detlef

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/volkerk

Klemann ,  Volker
1.3 Earth System Modelling , 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Scientific Technical Report STR, Deutsches GeoForschungsZentrum;

Wünsch ,  Johann

Zhang ,  Fei-Peng

Abstract
We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of or against continuing land uplift around Hudson Bay, Canada. After this, we reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained on the length and mid-epoch of the observation interval considered is investigated by means of the newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the continuous-wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of GFZ. Furthermore, sea-level indicators from the Churchill region representing the relative sea-level history during the past 8000 a are included. Finally, the four types of observable are jointly inverted in terms of mantle viscosity. The optimum values are 3×10^20 Pa s and 1.6 × 10^22 Pa s for the upper- and lower-mantle viscosities, respectively.