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Active rock glaciers and the lower limit of discontinuous alpine permafrost, Khumbu Himalaya, Nepal

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  • Matthias Jakob

Abstract

Seismic refraction studies were carried out on four rock glaciers in the Khumbu Himalaya near the Poklade massif (27°55′ N, 86°50′ E) and its surroundings. P‐wave velocities at profiles on southeast‐facing slopes indicate that the lower limit of discontinuous alpine permafrost is between 5560 m and 5360 m a.s.l. On west‐facing slopes the lower limit varies between 4959 m and 5050 m a.s.l. These values agree with elevations of active rock glacier termini. Des études par réfraction séismique ont été réalisées sur quatre glaciers rocheux dans l'Himalaya Khimbu, à proximité du massif Poklade (27°55′N, 86°50′E). Les vitessses des ondes primaires suivant des profils réalisés sur des pentes exposées au sud‐est indiquent que la limite inférieure du pergélisol de montagne se situe entre 5560 et 5360 m d'altitude. Ces valeurs correspondent bien aux extrémités des glaciers rocheux actifs.

Suggested Citation

  • Matthias Jakob, 1992. "Active rock glaciers and the lower limit of discontinuous alpine permafrost, Khumbu Himalaya, Nepal," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 3(3), pages 253-256, July.
    • Handle: RePEc:wly:perpro:v:3:y:1992:i:3:p:253-256
    DOI: 10.1002/ppp.3430030314
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