منابع مشابه
Towards Modeling Locations as Poly-Hierarchies
Location models are formal descriptions of locations (i. e., named sets of geographical positions) as well as of semantic relationships among locations. There exist various location models that vary in the considered location information, their level of detail, the kind of modelled relations and the used formal representation. In fact, more complex location models cover more aspects required fo...
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...
متن کاملConvective Structure of Hurricanes as Revealed by Lightning Locations
Cloud-to-ground lightning flash locations were examined for nine Atlantic basin hurricanes using data from the National Lightning Detection Network. A common radial distribution in ground flash density was evident: a weak maximum in the eyewall region, a clear minimum 80–100 km outside the eyewall, and a strong maximum in the vicinity of outer rainbands (210–290-km radius). These results are co...
متن کاملHolocene glacier fluctuations
A global overview of glacier advances and retreats (grouped by regions and by millennia) for the Holocene is compiled from previous studies. The reconstructions of glacier fluctuations are based on 1) mapping and dating moraines defined by 14C, TCN, OSL, lichenometry and tree rings (discontinuous records/time series), and 2) sediments from proglacial lakes and speleothems (continuous records/ t...
متن کاملEquilibrium-Line Altitudes of Late Quaternary Glaciers in the Zardkuh Mountain, Iran
Equilibrium-line altitudes (ELAs) of former glaciers in the Zardkuh Mountain of the Zagros Mountain Range were reconstructed from glacial-geologic data on former ice limits by using various methods. In the study area various types of glacial landforms such as outwash fans, moraines and well developed glacial cirques are observed. The results suggest that ELA were depressed 1433 m below to prese...
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ژورنال
عنوان ژورنال: Arctic and Alpine Research
سال: 1976
ISSN: 0004-0851
DOI: 10.2307/1550611