Active rock glaciers and the lower limit of discontinuous alpine permafrost, Khumbu Himalaya, Nepal
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...
| Published in: | Permafrost and Periglacial Processes |
|---|---|
| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ppp.3430030314 |
| Summary: | 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. |
|---|