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  4. 中国科学院地球与行星物理重点实验室
Grain growth of natural and synthetic ice at 0 degrees C

文献类型：期刊论文

作者Fan, Sheng1,2,3; Prior, David J.2; Pooley, Brent2; Bowman, Hamish2; Davidson, Lucy2; Wallis, David1; Piazolo, Sandra7; Qi, Chao5,6; Goldsby, David L.4; Hager, Travis F.4
刊名CRYOSPHERE
出版日期2023-08-23
卷号17期号:8页码:3443-3459
ISSN号1994-0416
DOI10.5194/tc-17-3443-2023
英文摘要Grain growth can modify the microstructure of natural ice, including the grain size and crystallographic preferred orientation (CPO). To better understand grain-growth processes and kinetics, we compared microstructural data from synthetic and natural ice samples of similar starting grain sizes that were annealed at the solidus temperature (0 degrees C) for durations of a few hours to 33 d. The synthetic ice has a homogeneous initial microstructure characterized by polygonal grains, little intragranular distortion, few bubbles, and a near-random CPO. The natural ice samples were subsampled from ice cores acquired from the Priestley Glacier, Antarctica. This natural ice has a heterogeneous microstructure characterized by a considerable number of air bubbles, widespread intragranular distortion, and a CPO. During annealing, the average grain size of the natural ice barely changes, whereas the average grain size of the synthetic ice gradually increases. These observations demonstrate that grain growth in natural ice can be much slower than in synthetic ice and therefore that the grain-growth law derived from synthetic ice cannot be directly applied to estimate the grain-size evolution in natural ice with a different microstructure. The microstructure of natural ice is characterized by many bubbles that pin grain boundaries. Previous studies suggest that bubble pinning provides a resisting force that reduces the effective driving force of grain-boundary migration and is therefore linked to the inhibition of grain growth observed in natural ice. As annealing progresses, the number density (number per unit area) of bubbles on grain boundaries in the natural ice decreases, whilst the number density of bubbles in the grain interiors increases. This observation indicates that some grain boundaries sweep through bubbles, which should weaken the pinning effect and thus reduce the resisting force for grain-boundary migration. Some of the Priestley ice grains become abnormally large during annealing. We speculate that the contrast of dislocation density amongst neighbouring grains, which favours the selected growth of grains with low dislocation densities, and bubble pinning, which inhibits grain growth, are tightly associated with abnormal grain growth. The upper 10m of the Priestley ice core has a weaker CPO and better-developed second maximum than deeper samples. The similarity of this difference to the changes observed in annealing experiments suggests that abnormal grain growth may have occurred in the upper 10m of the Priestley Glacier during summer warming.
WOS关键词MICROSTRUCTURAL EVOLUTION ; POLYCRYSTALLINE ICE ; FLOW LAW ; PART 1 ; CORE ; DEFORMATION ; TEMPERATURE ; SHEET ; SIZE ; RECRYSTALLIZATION
资助项目New Zealand Ministry of Business, Innovation and Employment[NZARI 2020-1-5] ; NewZealand Antarctic Research Institute[UOO1116] ; Marsden Fund[UOO052] ; Marsden Fund[MR/V021788/1] ; UK Research and Innovation Future Leaders Fellowship[41972232] ; National NaturalScience Foundation of China (NSFC)[NNX15AM69G] ; National Aeronautics and Space Administration ; [ASP-023-03]
WOS研究方向Physical Geography ; Geology
语种英语
出版者COPERNICUS GESELLSCHAFT MBH
WOS记录号WOS:001052939800001
资助机构New Zealand Ministry of Business, Innovation and Employment ; New Zealand Ministry of Business, Innovation and Employment ; NewZealand Antarctic Research Institute ; NewZealand Antarctic Research Institute ; Marsden Fund ; Marsden Fund ; UK Research and Innovation Future Leaders Fellowship ; UK Research and Innovation Future Leaders Fellowship ; National NaturalScience Foundation of China (NSFC) ; National NaturalScience Foundation of China (NSFC) ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; New Zealand Ministry of Business, Innovation and Employment ; New Zealand Ministry of Business, Innovation and Employment ; NewZealand Antarctic Research Institute ; NewZealand Antarctic Research Institute ; Marsden Fund ; Marsden Fund ; UK Research and Innovation Future Leaders Fellowship ; UK Research and Innovation Future Leaders Fellowship ; National NaturalScience Foundation of China (NSFC) ; National NaturalScience Foundation of China (NSFC) ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; New Zealand Ministry of Business, Innovation and Employment ; New Zealand Ministry of Business, Innovation and Employment ; NewZealand Antarctic Research Institute ; NewZealand Antarctic Research Institute ; Marsden Fund ; Marsden Fund ; UK Research and Innovation Future Leaders Fellowship ; UK Research and Innovation Future Leaders Fellowship ; National NaturalScience Foundation of China (NSFC) ; National NaturalScience Foundation of China (NSFC) ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; New Zealand Ministry of Business, Innovation and Employment ; New Zealand Ministry of Business, Innovation and Employment ; NewZealand Antarctic Research Institute ; NewZealand Antarctic Research Institute ; Marsden Fund ; Marsden Fund ; UK Research and Innovation Future Leaders Fellowship ; UK Research and Innovation Future Leaders Fellowship ; National NaturalScience Foundation of China (NSFC) ; National NaturalScience Foundation of China (NSFC) ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration
源URL[http://ir.iggcas.ac.cn/handle/132A11/111402]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Fan, Sheng
作者单位1.Univ Cambridge, Dept Earth Sci, Cambridge, England
2.Univ Otago, Dept Geol, Dunedin, New Zealand
3.RSC, 93 Terrace, Wellington, New Zealand
4.Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA USA
5.Univ Chinese, Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
7.Univ Leeds, Sch Earth & Environm, Leeds, England
推荐引用方式
GB/T 7714		 Fan, Sheng,Prior, David J.,Pooley, Brent,et al. Grain growth of natural and synthetic ice at 0 degrees C[J]. CRYOSPHERE,2023,17(8):3443-3459.
APA Fan, Sheng.,Prior, David J..,Pooley, Brent.,Bowman, Hamish.,Davidson, Lucy.,...&Hager, Travis F..(2023).Grain growth of natural and synthetic ice at 0 degrees C.CRYOSPHERE,17(8),3443-3459.
MLA Fan, Sheng,et al."Grain growth of natural and synthetic ice at 0 degrees C".CRYOSPHERE 17.8(2023):3443-3459.

入库方式： OAI收割

来源：地质与地球物理研究所

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