Radio-Echo Sounding: Reflections From Internal Layers In Ice Sheets
نویسندگان
چکیده
منابع مشابه
Radio Echo Sounding of the Greenland Inland Ice
Radio echo sounding has been used for a number of years in the exploration of polar ice such as the inland ice in Greenland and Antarc tica. By means of this technique a number of important glaciological and geophysical parameters may be deter mined. Examples are ice thickness, bedrock topography and structure, stratification patterns which are used for climate and flow patterns studies, and ...
متن کاملInstruments and Methods Improved method to determine radio-echo sounding reflector depths from ice-core profiles of permittivity and conductivity
We present a technique that modifies and extends down-hole target methods to provide absolute measures of uncertainty in radar-reflector depth of origin. We use ice-core profiles to model wave propagation and reflection, and then cross-correlate the model results with radio-echo sounding (RES) data to identify the depth of reflector events. Stacked traces recorded with RES near the EPICA drill ...
متن کاملInference of accumulation-rate patterns from deep layers in glaciers and ice sheets
The spatial pattern of accumulation rate can be inferred from internal layers in glaciers and ice sheets. Non-dimensional analysis determines where finite strain can be neglected (‘shallow-layer approximation’) or approximated with a local one-dimensional flow model (‘local-layer approximation’), and where gradients in strain rate along particle paths must be included (‘deep layers’). We develo...
متن کاملInternal melting in Antarctic sea ice: Development of ‘‘gap layers’’
[1] An internal ‘‘gap’’ layer of deteriorated sea ice is colocated with a significant microbial biological community in late first year and second year Antarctic sea ice in summer. We modeled gap layer formation using a thermal flux model based on the summer reversal in thermal gradient and the thermal conductivity found in the upper ice column. The conductive model gives internal sea ice melt ...
متن کاملRF Sounding: Generating Sounds from Radio Frequencies
On the other hand the problem of the electromagnetic pollution has recently become an important theme of discussion for both scientific and media communities and it has often been faced with incomplete, where not wrong, knowledge of the phenomena involved. This is especially true while concerning with cellular networks where the most popular belief is that transmitting antenna produce the most ...
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: Journal of Glaciology
سال: 1977
ISSN: 0022-1430,1727-5652
DOI: 10.3189/s002214300002147x