Equilibrium-line altitudes during the Last Glacial Maximum across the Brooks Range, Alaska

2005 ◽  
Vol 20 (7-8) ◽  
pp. 821-838 ◽  
Author(s):  
Nicholas L. Balascio ◽  
Darrell S. Kaufman ◽  
William F. Manley
Keyword(s):  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Equilibrium Line ◽  
Brooks Range ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Geomorphological record and equilibrium line altitude of glaciers during the last glacial maximum in the Rodna Mountains (eastern Carpathians)

2020 ◽  
pp. 1-20
Author(s):  
Piotr Kłapyta ◽  
Marcel Mîndrescu ◽  
Jerzy Zasadni
Keyword(s):  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Equilibrium Line ◽  
Surface Geometry ◽  
Equilibrium Line Altitude ◽  
Last Glacial ◽  
Eastern Carpathians ◽  
Glacial Stage ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Abstract In the eastern Carpathians the legacy of glaciation is preserved in several isolated mountain massifs. This paper presents new mapping results of glaciated valley land systems in the Rodna Mountains, the highest part of the eastern Carpathians (2303 m above seal level). In most of the glacial valleys, the maximal Pleistocene extent is marked by freshly shaped moraines, which are referred in this study as the Pietroasa glacial stage and regarded as the last glacial maximum (LGM) advance. Only in three valleys do older Şesura glacial stage moraines (pre-LGM, likely Marine Oxygen Isotope Stage 6) occur. On the basis of the geomorphological record, we reconstruct the extent, surface geometry, and equilibrium line altitude (ELA) of Pietroasa-stage glaciers. The local ELA pattern of north-exposed glaciers in the Rodna Mountains shows a rising trend towards the southeast, which suggests dominant snow-bearing winds and orographically induced precipitation from the west. This finding fits well with the dominant palaeo-wind direction inferred from other Carpathian proxies and confirms the dominance of zonal circulation pattern during the global LGM in central eastern Europe.

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