Airborne-radar stratigraphy and electrical structure of temperate firn: Bagley Ice Field, Alaska, U.S.A.
نویسندگان
چکیده
منابع مشابه
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates
We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica. Our analysis found a wide range of capabilities, including imaging of post firn–ice transition horizons and sounding of shallow glaciers and ice shelves. Imaging of horizons to depths exceeding 600m was possible in the ...
متن کاملMulti-decadal elevation changes on Bagley Ice Valley and Malaspina Glacier, Alaska
[1] Digital elevation models (DEMs) of Bagley Ice Valley and Malaspina Glacier produced by (i) Intermap Technologies, Inc. (ITI) from airborne interferometric synthetic aperture radar (InSAR) data acquired 4–13 September 2000, (ii) the German Aerospace Center (DRL) from spaceborne InSAR data acquired by the Shuttle Radar Topography Mission (SRTM) 11–22 February 2000, and (iii) the US Geological...
متن کاملPenetration depth of interferometric syntheticsaperture radar signals in snow and ice
Digital elevation models of glaciated terrain produced by the NASA/Jet Propulsion Laboratory (JPL) airborne interferometric synthetic-aperture radar (InSAR) instrument in Greenland and Alaska at the C(5.6 cm wavelength) and L-band (24-cm) frequencies were compared with surface elevation measured from airborne laser altimetry to estimate the phase center of the interferometric depth, or penetrat...
متن کاملGenesis and Deformation of Firn Stratigraphy in West and East Antarctica: Evidence from the Us Itase Subsurface Radar Profiles
The US contribution to the ITASE program obtained shallow and deep radar profiles along its thousands of km of traverse during 1999–2003 over West Antarctica, and along its 1200 km traverse behind the Transantarctic Mountains in East Antarctica during 2006–2007. I discuss the shallow profiles, which used short-pulse radar operating at 400 MHz to profile depths of 56–135 m in West Antarctica, an...
متن کاملAntarctic firn compaction rates from repeat-track airborne radar data: I. Methods
While measurements of ice-sheet surface elevation change are increasingly used to assess mass change, the processes that control the elevation fluctuations not related to ice-flow dynamics (e.g. firn compaction and accumulation) remain difficult to measure. Here we use radar data from the Thwaites Glacier (West Antarctica) catchment to measure the rate of thickness change between horizons of co...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2002
ISSN: 0022-1430,1727-5652
DOI: 10.3189/172756502781831412