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- W2258193906 abstract "The International Partnership for Ice Core Sciences (IPICS) identified the retrieve of an Oldest-Ice ice core as one of the most important scientificchallenges in ice core research for the near future. As the outcome of an Oldest-Ice workshop a general approach was recently suggested how tocombine geophysical reconnaissance, numerical ice-flow modelling and sample drilling to identify the most promising sites where about 1.5 Ma old icecould most likely be found (Fischer et al., CP, 2013). The most critical unknown parameter is the geothermal heat flow underneath the ice, followed bybed topography and integrity of internal layering. Here, we propose the combined application of geophysical methods in conjunction with existingice-core data to improve the knowledge on physical properties of the ice and the underlaying strata. It builds on (i) conventional application of potentialfield geophysics (gravimetry and magnetics) to estimate subglacial geology; (ii) radar internal architecture to determine layer integrity and bedrocktopography; (iii) combination of ice-core profiles with radar to determine the origin - and thus confirm isochronity and age - of internal radar layers,complemented by layer attributes; (iv) extrapolation of ice-core impurities and the related attenuation of radar waves in space along internal layers;and (v) radar and seismic wave attenuation analyses to determine the englacial temperature distribution. This approach has the potential to improveour capabilities to estimate the spatial variation of geothermal heat flux and provide spatially distributed age-depth constraints for ice-flow models." @default.
- W2258193906 created "2016-06-24" @default.
- W2258193906 creator A5060957266 @default.
- W2258193906 date "2014-03-13" @default.
- W2258193906 modified "2023-09-23" @default.
- W2258193906 title "How to identify Antarctica's Oldest Ice with geophysical data?" @default.
- W2258193906 hasPublicationYear "2014" @default.
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