Shallow hot-point drill system for active layer temperature measurement along Zhongshan–Dome A traverse, Antarctica

Title Shallow hot-point drill system for active layer temperature measurement along Zhongshan–Dome A traverse, Antarctica
Publication Type
Journal Article
Year
2021
Author(s) Yazhou Li , Xiaopeng Fan, Pavel Talalay, Yinke Dou, Siyu Lu, Shichang Kang, Xiao Li, Jialin Hong
Journal/ Publication
Annals of Glaciology
Pagination
1-9
Abstract

In glaciology, snow–firn temperature at 10 m is considered a representation of the mean annual air temperature at the surface (MAAT) of the studied site. Although MAAT is an important parameter in ice-sheet investigations, it has not been widely measured in Antarctica. To measure the 10 m snow–firn temperature in Antarctica, a shallow hot-point drill system is designed. In this simple and lightweight system, a hot-point drill can melt boreholes with a diameter of 34 mm in the snow–firn to a depth of 30 m and a temperature sensors string can measure the borehole temperature precisely. In the 2018/19 field season, 16 boreholes along the Zhongshan–Dome A traverse were drilled, and the borehole temperature was measured. Although certain problems existed pertaining to the hot-point drill, a total depth of ~244 m was successfully drilled at an average penetration rate of ~10 m h−1. After borehole drilling, ~12–15 h were generally required for the borehole to achieve thermal equilibrium with the surroundings. Preliminary results demonstrated that the 10 m snow–firn temperature along the traverse route was affected by the increasing altitude and latitude, and it decreased gradually with an increase in the distance from Zhongshan station.

DOI
10.1017/aog.2020.87
File
URL
Special Collections International Workshop on Ice Drilling Technology Series, 8th International Ice Drill Symposium
Categories Borehole Logging, Hot-Point Drills
Citation Yazhou Li , Xiaopeng Fan, Pavel Talalay, Yinke Dou, Siyu Lu, Shichang Kang, Xiao Li, Jialin Hong ( 2021 ) Shallow hot-point drill system for active layer temperature measurement along Zhongshan–Dome A traverse, Antarctica. Annals of Glaciology , 1-9 . doi: 10.1017/aog.2020.87
Lead Author
Yazhou Li