Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya

Title Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya
Publication Type
Journal Article
Year
2021
Author(s) Akane Tsushima , Morihiro Miyahara, Tetsuhide Yamasaki, Nao Esashi, Yota Sato, Rijan B Kayastha, Ang J B Lama Sherpa, Masaki Sano, Koji Fujita
Journal/ Publication
Annals of Glaciology
Pagination
1-7
Abstract

We drilled an 81.2-m-long ice core in the accumulation area (5860 m a.s.l.) of Trambau Glacier in the Rolwaling region during October–November 2019. The drilling operation was conducted with a lightweight electro-mechanical drill system after two reconnaissance fieldworks in 2017 and 2018, during which two shallow firn cores were drilled with a hand auger. The drill system and ice core samples were transported by helicopters at a high elevation of 6000 m a.s.l. A further challenging issue was the ice core transportation between Nepal and Japan, as no regular commercial flight was available for the frozen samples. The addition of dry ice imported from India immediately prior to leaving Nepal allowed the ice core samples to be successfully transported to a cold room in Japan, and remain in a frozen state. Stratigraphic observations during the drilling operation suggest the drill site has been affected by melting and refreezing.

DOI
10.1017/aog.2021.15
File
URL
Special Collections International Workshop on Ice Drilling Technology Series, 8th International Ice Drill Symposium
Categories Alpine/High-Altitude, Lightweight/Portable
Citation Akane Tsushima , Morihiro Miyahara, Tetsuhide Yamasaki, Nao Esashi, Yota Sato, Rijan B Kayastha, Ang J B Lama Sherpa, Masaki Sano, Koji Fujita ( 2021 ) Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya. Annals of Glaciology , 1-7 . doi: 10.1017/aog.2021.15
Lead Author
Akane Tsushima