Thermomechanically coupled modelling for land-terminating glaciers: a comparison of two-dimensional, first-order and three-dimensional, full-Stokes approaches
文献类型：期刊论文
| 作者 | Zhang, Tong1,2; Ju, Lili1,2; Leng, Wei3; Price, Stephen4; Gunzburger, Max5 |
| 刊名 | JOURNAL OF GLACIOLOGY
 |
| 出版日期 | 2015 |
| 卷号 | 61期号:228页码:702-712 |
| 关键词 | glacier flow ice dynamics |
| ISSN号 | 0022-1430 |
| DOI | 10.3189/2015J0G14J220 |
| 英文摘要 | For many regions, glacier inaccessibility results in sparse geometric datasets for use as model initial conditions (e.g. along the central flowline only). In these cases, two-dimensional (2-D) flowline models are often used to study glacier dynamics. Here we systematically investigate the applicability of a 2-D, first-order Stokes approximation flowline model (FLM), modified by shape factors, for the simulation of land-terminating glaciers by comparing it with a 3-D, 'full'-Stokes ice-flow model (FSM). Based on steady-state and transient, thermomechanically uncoupled and coupled computational experiments, we explore the sensitivities of the FLM and FSM to ice geometry, temperature and forward model integration time. We find that, compared to the FSM, the FLM generally produces slower horizontal velocities, due to simplifications inherent to the FLM and to the underestimation of the shape factor. For polythermal glaciers, those with temperate ice zones, or when basal sliding is important, we find significant differences between simulation results when using the FLM versus the FSM. Over time, initially small differences between the FLM and FSM become much larger, particularly near cold/temperate ice transition surfaces. Long time integrations further increase small initial differences between the two models. We conclude that the FLM should be applied with caution when modelling glacier changes under a warming climate or over long periods of time. |
| 资助项目 | US Department of Energy, Office of Science, Advanced Scientific Computing Research and Biological and Environmental Research programs through the Scientific Discovery through Advanced Computing (SciDAC) project PISCEES ; US National Science Foundation[DMS-1215659] ; National 863 Project of China[2012AA01A309] ; National Center for Mathematics and Interdisciplinary Sciences of the Chinese Academy of Sciences |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000363002200008 |
| 出版者 | INT GLACIOL SOC |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/20957]  |
| 专题 | 中国科学院数学与系统科学研究院 |
| 通讯作者 | Ju, Lili |
| 作者单位 | 1.Univ S Carolina, Dept Math, Columbia, SC 29208 USA 2.Univ S Carolina, Interdisciplinary Math Inst, Columbia, SC 29208 USA 3.Chinese Acad Sci, State Key Lab Sci & Engn Comp, Beijing, Peoples R China 4.Los Alamos Natl Lab, Fluid Dynam & Solid Mech Grp, Los Alamos, NM USA 5.Florida State Univ, Dept Comp Sci, Tallahassee, FL 32306 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Tong,Ju, Lili,Leng, Wei,et al. Thermomechanically coupled modelling for land-terminating glaciers: a comparison of two-dimensional, first-order and three-dimensional, full-Stokes approaches[J]. JOURNAL OF GLACIOLOGY,2015,61(228):702-712. |
| APA | Zhang, Tong,Ju, Lili,Leng, Wei,Price, Stephen,&Gunzburger, Max.(2015).Thermomechanically coupled modelling for land-terminating glaciers: a comparison of two-dimensional, first-order and three-dimensional, full-Stokes approaches.JOURNAL OF GLACIOLOGY,61(228),702-712. |
| MLA | Zhang, Tong,et al."Thermomechanically coupled modelling for land-terminating glaciers: a comparison of two-dimensional, first-order and three-dimensional, full-Stokes approaches".JOURNAL OF GLACIOLOGY 61.228(2015):702-712. |
入库方式： OAI收割
来源：数学与系统科学研究院
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