Melting Rates at the Bottom of Filchner-Ronne Ice Shelf, Antarctica, from Short-term Mass-balance Studies

1991/01/01 by Jürgen Determann, Determann, J., Klaus Grosfeld +3
Earth and Planetary Sciences · Medicine · #Cryospheric studies and observations #Winter Sports Injuries and Performance #Geology and Paleoclimatology Research

paper · pdf · doi:10.2312/polarforschung.60.1.25

Abstract

Field studics which were performed in 1990 on a strain network yielded all quantities which are nccessary to solvc the mass-conservation equation with rcspect to the melting rate undcrneath the Filchner-Ronne lee Shelf, Antarctica.The network was locatcd about 30 km inland from the ice front and about 50 km north-west of Filchncr Station.Rcpeatcd electro-optical distancc measurements.direction observations and absolut positioning using satellite methods (GPS).deterrnined strain rotes and icc-flow velocities.Icc thickness and ice-thickness gradicnts wcre obtained by hot-watcr drilling and electro-magnetic reflection soundings (Elvlk.),respectivcly.Surface accumulation rates were taken from measuremcnts in snow pits.Duc to thc high precision ofthe uscd ficld techniques.about one month betwecn re-obscrvations was sufficient to estimate a melting rate of 1.5 m/a within 0.15 m/a of accuracy.

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