geodetic monitoring of crustal deformation in dronning maud land, antarctica
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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