By C. C. Langway Jr., H. Oeschger, W. Dansgaard
About The Product
Published through the yankee Geophysical Union as a part of the Geophysical Monograph Series.
The Greenland Ice Sheet application (GISP) is already well-known as an incredible success in glaciology. GISP help got here from the Swiss nationwide technological know-how starting place, the Danish fee for clinical learn in Greenland and the U.S. nationwide technological know-how starting place. And with the spirit, force, and talent of Hans Oeschger, Willi Dansgaard and Chester Langway, GISP used to be deliberate, undertaken and effectively concluded. the consequences awarded right here reveal the importance of the climatic checklist kept in ice sheets and reemphasizes the necessity for extra deep ice cores from Greenland and Antarctica.
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500 m. the Dye3 ,XVvaluesincrease steadily fromI2 m s-• to approximately natural distributionmore closelyapproximatesa Fisherjandistribution. This seems to be the case for the Dye 3 thbrics as •ell: 50 m s -• by a depthof 1000m. By 1279m, ,XVincreases to about70 m s-'•, andthisaverageis maintainedfor the next 500 m. XVincreases to 125m s •1, andit remains at valuesaboveI20 m s • throughthe deepestmeasurement at a depth of 1995m where it reachesa value of 139 m s-•. 500 m there is a steady reorientationof c-axes to,½,'ard the vertical.
5mm2 andthe samehighvoltageof 1250V wereused. The load on the electrodes was in the order of 5- lff' Pa. For this setup Hammer establishedthe calibration curve [Hammer, 19801linkingthe measuredcurrent and the amountof dissolved acidity in the ice. In our case the current is recorded by an x-y recorder, Watanabe Model 4410. Due to the slo• response time of the recorder, short-time variations of the current are attenuated. Witha slidingvelocityof 10cmsec-•, thedepthresolution isaround ! cm. To improve the resolution we tested a microprocessor controlled digital recording system in summer 1980 and 1981.
Battacharji, pp. 121-150, SpringerVerlag, New York, 1977. , Refraction corrections for universal stage measurements. I. Uniaxial crystals, American Mineralogy, 47, 227-245, 1962. , The temperature dependence of seismic waves in ice, Journal Glaciology, 67, 144-147, 1974. R. , 148-150, 1977. , and C. C. , Untersuchungen mit ultraschall an eisbohrkernen aus Zentralgronland, Polarforschung, 47, 1-10, 1977. J. Gow, Ultrasonic velocity investigations of crystal anisotropy in deep ice cores from Antarctica, Journal of Geophysical Research, 84, 4865-4874, 1979.