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- Title
Shallow hot-point drill system for active layer temperature measurement along Zhongshan-Dome A traverse, Antarctica.
- Authors
Yazhou Li; Xiaopeng Fan; Talalay, Pavel G.; Yinke Dou; Siyu Lu; Shichang Kang; Xiao Li; Jialin Hong
- Abstract
In glaciology, snow-firn temperature at 10m 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 10m 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 34mm in the snow-firn to a depth of 30m 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 ~244m was successfully drilled at an average penetration rate of ~10mh-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 10m 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.
- Subjects
DRILLING &; boring; GLACIOLOGY; SNOW; ATMOSPHERIC temperature; BOREHOLES
- Publication
Annals of Glaciology, 2021, Vol 62, Issue 84, p157
- ISSN
0260-3055
- Publication type
Article
- DOI
10.1017/aog.2020.87