Glacier flow measurement and radio-echo sounding at Aurora Peak, Alaska, in 2008
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 کاملDynamic Changes at Yahtse Glacier, the Most Rapidly Advancing Tidewater Glacier in Alaska
Since 1990, Yahtse Glacier in southern Alaska has advanced at an average rate of ∼100m year−1 despite a negativemass balance, widespread thinning in its accumulation area, and a low accumulation-area ratio. To better understand the interannual and seasonal changes at Yahtse and the processes driving these changes, we construct velocity and ice surface elevation time series spanning the years 19...
متن کاملSubmarine melting at the terminus of a temperate tidewater glacier, LeConte Glacier, Alaska, U.S.A
Heat, freshand sea-water balances indicate that the late-summer rate of submarine melting at the terminus of tidewater LeConte Glacier, Alaska, U.S.A., in 2000 was about 12mdw.e., averaged over the submerged face. This is 57% of the estimated total ice loss at the terminus (calving plus melting) at this time. Submarine melting may thus providea significantcontribution to the overall ablationof ...
متن کاملInstrwnents and Methods Miniature high-power illlpulse transmitter for radio-echo sounding
We have developed a miniature high-power impulse transmitter for radio-echo sounding of glaciers. It features two synchronous second break-down pulse generators operating in a differential configuration. Specifications include bipolar 550 V pulses having rise times less than 2 ns, 512 Hz repetition rate, 180 mA at 10-14 V d.c. operating power, 5 mA standby current and maximum dimension of 12 cm...
متن کاملGlacier surge mechanism: 1982-1983 surge of variegated glacier, alaska.
The hundredfold speedup in glacier motion in a surge of the kind the kind that took place in Variegated Glacier in 1982-1983 is caused by the buildup of high water pressure in the basal passageway system, which is made possible by a fundamental and pervasive change in the geometry and water-transport characteristics of this system. The behavior of the glacier in surge has many remarkable featur...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2011
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756411797252130