Numerical Modelling Of Rutford Ice Stream, Antarctica
نویسندگان
چکیده
منابع مشابه
Radar surveys of the Rutford Ice Stream onset zone, West Antarctica: indications of flow (in)stability?
We present 1 and 100MHz ground-based radar data from the onset region of Rutford Ice Stream, West Antarctica, which indicate the form and internal structure of isochrones. In the flowparallel lines, modelled isochrone patterns reproduce the gross pattern of the imaged near-surface layers, assuming steady-state flow velocity from GPS records and the current accumulation rate for the last 200 yea...
متن کاملTidally induced variations in vertical and horizontal motion on Rutford Ice Stream, West Antarctica, inferred from remotely sensed observations
To better understand the influence of stress changes over floating ice shelves on grounded ice streams, we develop a Bayesian method for inferring time-dependent 3-D surface velocity fields from synthetic aperture radar (SAR) and optical remote sensing data. Our specific goal is to observe ocean tide-induced variability in vertical ice shelf position and horizontal ice stream flow. Thus, we con...
متن کامل3D velocity field time series using synthetic aperture radar: application to tidal-timescale ice-flow variability in Rutford Ice Stream, West Antarctica
We present a general method for retrieving time-series of three component surface velocity field vector given a set of continuous synthetic aperture radar (SAR) acquisitions collected from multiple geometries. Our algorithm extends the single-line-of-sight mathematical framework developed for time-series analysis using interferometric SAR (InSAR) to three spatial dimensions. The inversion is dr...
متن کاملSynthetic aperture radar interferotnetry over Rutford Ice Streatn and Carlson Inlet, Antarctica
We d escribe the calibration and interpretation of interferograms generated from ERS-I synthetic ape rture rad a r Single Loo k Complex (SAR .SLC) images of the Rutford Ice Stream a rea. Ground surveys provide over 100 tie-points with which to optimise the interferometric baselines that sepa rate nominall y repeated satellite orbits. Covariant tie-point errors are dealt with by constructi ng an...
متن کاملNumerical investigations of the slow - down ofWhillans Ice Stream , West Antarctica : is it shutting down like Ice StreamC ?
We investigate whether the recent slow-down of Whillans Ice Stream (WIS),West Antarctica, may lead to its complete stoppage in the near future, using a numerical model. Basal resistance to ice-stream motion is represented by a continuous till layer whose strength changes in response to basal melting and freezing.We implement a basal drainage system, which acts to hinder ice-stream stoppage thro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 1990
ISSN: 0260-3055,1727-5644
DOI: 10.3189/s0260305500008971