气候变化领域集成服务门户(CCPortal): Fluctuations of a Greenlandic tidewater glacier driven by changes in atmospheric forcing: Observations and modelling of Kangiata Nunaata Sermia, 1859-present

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DOI	10.5194/tc-8-2031-2014
	Fluctuations of a Greenlandic tidewater glacier driven by changes in atmospheric forcing: Observations and modelling of Kangiata Nunaata Sermia, 1859-present
	Lea J.M.; Mair D.W.F.; Nick F.M.; Rea B.R.; Van As D.; Morlighem M.; Nienow P.W.; Weidick A.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
英文摘要	Many tidewater glaciers in Greenland are known to have undergone significant retreat during the last century following their Little Ice Age maxima. Where it is possible to reconstruct glacier change over this period, they provide excellent records for comparison to climate records, as well as calibration/validation for numerical models. These glacier change records therefore allow for tests of numerical models that seek to simulate tidewater glacier behaviour over multi-decadal to centennial timescales. Here we present a detailed record of behaviour from Kangiata Nunaata Sermia (KNS), SW Greenland, between 1859 and 2012, and compare it against available oceanographic and atmospheric temperature data between 1871 and 2012. We also use these records to evaluate the ability of a well-established one-dimensional flow-band model to replicate behaviour for the observation period. The record of terminus change demonstrates that KNS has advanced/retreated in phase with atmosphere and ocean climate anomalies averaged over multi-annual to decadal timescales. Results from an ensemble of model runs demonstrate that observed dynamics can be replicated. Model runs that provide a reasonable match to observations always require a significant atmospheric forcing component, but do not necessarily require an oceanic forcing component. Although the importance of oceanic forcing cannot be discounted, these results demonstrate that changes in atmospheric forcing are likely to be a primary driver of the terminus fluctuations of KNS from 1859 to 2012. We propose that the detail and length of the record presented makes KNS an ideal site for model validation exercises investigating links between climate, calving rates, and tidewater glacier dynamics.
学科领域	air temperature; atmospheric forcing; glacier dynamics; Little Ice Age; model validation; tidewater glacier; timescale; Arctic; Greenland
语种	英语
scopus关键词	air temperature; atmospheric forcing; glacier dynamics; Little Ice Age; model validation; tidewater glacier; timescale; Arctic; Greenland
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120034
作者单位	Department of Geography and the Environment, University of Aberdeen, Elphinstone Road, Aberdeen, AB243UF, United Kingdom; University Centre in Svalbard (UNIS), P.O. Box 156, Longyearbyen, 9171, Norway; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2100, Denmark; Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark; University of California, Irvine, Department of Earth System Science, Croul Hall, Irvine, CA 92697-3100, United States; Department of Geography, University of Edinburgh, Drummond Street, Edinburgh, EH89XP, United Kingdom; Department of Geography and Quaternary Geology, Stockholm University, Stockholm, 10691, Sweden
推荐引用方式 GB/T 7714	Lea J.M.,Mair D.W.F.,Nick F.M.,et al. Fluctuations of a Greenlandic tidewater glacier driven by changes in atmospheric forcing: Observations and modelling of Kangiata Nunaata Sermia, 1859-present[J],2014,8(6).
APA	Lea J.M..,Mair D.W.F..,Nick F.M..,Rea B.R..,Van As D..,...&Weidick A..(2014).Fluctuations of a Greenlandic tidewater glacier driven by changes in atmospheric forcing: Observations and modelling of Kangiata Nunaata Sermia, 1859-present.Cryosphere,8(6).
MLA	Lea J.M.,et al."Fluctuations of a Greenlandic tidewater glacier driven by changes in atmospheric forcing: Observations and modelling of Kangiata Nunaata Sermia, 1859-present".Cryosphere 8.6(2014).