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Ph.D student at LMV/Chalmers

Ph.D student at LMV/Chalmers. Topic : Gravimetry (AG, SG) Student : Per-Anders Olsson Supervisor : Hans-Georg Scherneck (Jonas Ågren) Where? : LMV/Chalmers Financed by: LMV When? : 2007-09-01  2013-12-31??. First project – Baltic Sea. Paper to Jena 2008-09-01. Why Baltic Sea?

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Ph.D student at LMV/Chalmers

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  1. Ph.D student at LMV/Chalmers Topic : Gravimetry (AG, SG) Student : Per-Anders Olsson Supervisor : Hans-Georg Scherneck (Jonas Ågren) Where? : LMV/Chalmers Financed by: LMV When? : 2007-09-01  2013-12-31??

  2. First project – Baltic Sea Paper to Jena 2008-09-01 • Why Baltic Sea? • Large amplitude • Not periodic • Not handled (FG5) • Data ”avaliable” • Unique conditions • Short and long term effects

  3. Spherical, elastic earth • Greens function for gravity • Convolution of Greens function and sea surface • Newtonian effect at height • Load love numbers from • G-B Earth Model1 • PREM reference earth model2 Theoretical approach • Farrell, W.E., 1972. Deformation of the Earth by Surface Loads, Reviews of Geophysics and Space Physics, 10, 761-797. • Jentzsch, G., 1997. Earth Tides and Ocean Tidal Loading. in Tidal Phenomena, pp. 145-172, eds. Wilhelm, H., Zürn, W. & Wenzel, H.-G. Springer-Verlag, Berlin Heidelberg.

  4. Some examples Please, be aware… …the purpose of the following is not to present any results (everything is still preliminary), I just want to give You an idea of what I am working with and hopefully get some response to that.

  5. Stations and grid 10 degree sea surface Baltic sea surface

  6. One meter water (1) 10 degree sea surface Baltic sea surface All numbers in gal

  7. One meter water (2) Distribution of the loading effect

  8. Data from SMHI (1)

  9. Data from SMHI (2) 2008-03-27 2008-03-06

  10. Data from SMHI (3)

  11. Sensitivity of location (1) text H/10 < Thetacritical < H*10

  12. Sensitivity of location (2) One meter water, 10 degree sea surface

  13. Long term sea level change

  14. Storm in the Baltic Sea 1872 Sea level in Danish foot (0.3 m) All numbers in gal

  15. Conclusions...

  16. To come… … Baltic loading … Groundwater … Atmospheric loading … GIA … SG/AG

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