Large ensemble modeling of the last deglacial retreat of the West Antarctic Ice Sheet: comparison of simple and advanced statistical techniques
Large ensemble modeling of the last deglacial retreat of the West Antarctic Ice Sheet: comparison of simple and advanced statistical techniques
复制标题
南极西部冰盖最后一次冰消退的大型集合建模:简单和先进统计技术的比较
DOI:
10.5194/gmd-9-1697-2016
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发表时间:
2015
影响因子:
5.1
通讯作者:
R. DeConto
中科院分区:
文献类型:
--
作者:
D. Pollard;Won Chang;M. Haran;P. Applegate;R. DeConto
Abstract. A 3-D hybrid ice-sheet model is applied to the last deglacial retreat of the West Antarctic Ice Sheet over the last ∼ 20 000 yr. A large ensemble of 625 model runs is used to calibrate the model to modern and geologic data, including reconstructed grounding lines, relative sea-level records, elevation–age data and uplift rates, with an aggregate score computed for each run that measures overall model–data misfit. Two types of statistical methods are used to analyze the large-ensemble results: simple averaging weighted by the aggregate score, and more advanced Bayesian techniques involving Gaussian process-based emulation and calibration, and Markov chain Monte Carlo. The analyses provide sea-level-rise envelopes with well-defined parametric uncertainty bounds, but the simple averaging method only provides robust results with full-factorial parameter sampling in the large ensemble. Results for best-fit parameter ranges and envelopes of equivalent sea-level rise with the simple averaging method agree well with the more advanced techniques. Best-fit parameter ranges confirm earlier values expected from prior model tuning, including large basal sliding coefficients on modern ocean beds.
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影响因子:
30.7
作者:
Favier, L.;Durand, G.;Le Brocq, A. M.
通讯作者:
Le Brocq, A. M.
影响因子:
12.1
作者:
Livingstone, Stephen J.;Cofaigh, Colm O.;Jamieson, Stewart S. R.
通讯作者:
Jamieson, Stewart S. R.
DOI:
10.1016/j.cageo.2009.11.004
发表时间:
2010-06
期刊:
Comput. Geosci.
影响因子:
--
作者:
N. Urban;Thomas E. Fricker
通讯作者:
N. Urban;Thomas E. Fricker
影响因子:
64.8
作者:
M. Weber;P. Clark;G. Kuhn;A. Timmermann;D. Sprenk;R. Gladstone;Xu Zhang;Gerrit Lohmann;L. Menv
通讯作者:
M. Weber;P. Clark;G. Kuhn;A. Timmermann;D. Sprenk;R. Gladstone;Xu Zhang;Gerrit Lohmann;L. Menv
影响因子:
4.1
作者:
Cornford, Stephen L.;Martin, Daniel F.;Lipscomb, William H.
通讯作者:
Lipscomb, William H.