geodetic monitoring of crustal deformation in dronning maud land, antarctica
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Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Geodetic monitoring of crustal deformation in Dronning Maud Land, Antarctica
Hannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku Poutanen
Finnish Geodetic Institute, Masala, Finland
Poster: European Geosciences Union, General Assembly 2005, Vienna, Austria, 24 - 29 April, 2005
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Study Program
Crustal deformation in DML• Permanent GPS station(s)
– Vertical and horizontal motion
• Repeated absolute gravity– Vertical motion– changes in dencity distribution
• Grace– regional estimates of variation in total mass
• CryoSat– Surface elevation change
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Study area
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
GPS
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Absolute gravity
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Absolute gravity
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Near-field snow and ice
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Results
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Schedule 2005 -
• GPS 2003 -
• Absolute gravity – Aboa
• 1994, 2001, 2004, 2006, 2008
– Sanae IV, Novolazarevskaya• 2004, 2006, 2008
– Svea, Troll ??
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
Summary & conclusion
• GRACE will provide regional estimates of variation in total mass i.e. the sum of mantle flow of the Glacial Isostatic Adjustment and contemporary ice mass balance.
• In the near future, CRYOSAT will monitor surface elevation change.
• FGI continues gravity & GPS program
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
Geodetic monitoring of crustal deformation in Dronning Maud Land, AntarcticaHannu Koivula, Jaakko Mäkinen, Joel Ahola and Markku PoutanenFinnish Geodetic Institute
Nordic Geodetic CommissionWorking Group for GeodynamicsAnnual Meeting Masala , May 3-4, 2005
• absolute gravity, CGPS, Cryosat, and GRACE all sense past and/or present changes in the ice mass.
• They however have shortcomings and observational errors, and are also sensitive to other signals: say, tectonics (gravity, GPS) or variation in atmospheric and ocean mass (GRACE).
Summary & conclusion
• Using them in combination provides powerful redundancy checks and the possibility to estimate/eliminate unwanted signals and modelling errors.
Study program
Study Area
GPS
Absolute gravity
Near-field snow and ice
Results
Schedule 2005 –
Summary & conclusion
Partners
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