Arid
DOI10.1177/0959683616687381
Rates and processes of aeolian soil erosion in West Greenland
Heindel, Ruth C.1; Culler, Lauren E.2,3; Virginia, Ross A.2,3
通讯作者Heindel, Ruth C.
来源期刊HOLOCENE
ISSN0959-6836
EISSN1477-0911
出版年2017
卷号27期号:9页码:1281-1290
英文摘要

In arid landscapes across the globe, aeolian processes are key drivers of landscape change, but arid Arctic regions are often overlooked. In the Kangerlussuaq region of West Greenland, strong katabatic winds have removed discrete patches of soil and vegetation, exposing unproductive glacial till and bedrock. Although lake-sediment records suggest that landscape destabilization began approximately 1000 years ago, the upland soil erosion has never been directly dated. We use a novel application of lichenometry to estimate the rates and timing of soil erosion. We show that the formation of deflation patches occurred approximately 800-230 years ago, in general agreement with lake-sediment records. In West Greenland, the ’Little Ice Age’ (AD 1350-1880) was characterized by a cold and arid climate, conditions that increased susceptibility to erosion. On average, deflation patches are expanding at a rate of 2.5 cm yr(-1), and variation in the rate of patch expansion cannot be explained by proximity to the Greenland Ice Sheet (GrIS), slope, aspect, elevation, or patch size. An erosional threshold exists in this aeolian system, with climate conditions necessary for patch formation likely harsher than those necessary for continued patch expansion, a result that has implications for land management in arid regions. Currently, deflation patches are expanding throughout the study region and are forming in areas close to the GrIS, but future deflation rates are dependent on projected climate and potential land-use changes. Our results stress the importance of aeolian processes in arid polar landscapes such as Kangerlussuaq, and demonstrate the use of aeolian landforms in paleoclimate reconstructions and predicting future landscape change.


英文关键词Arctic landscape change lichenometry paleoclimate wind erosion
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000412711700003
WOS关键词SPATIAL-DISTRIBUTION ; GROWTH-RATES ; KANGERLUSSUAQ ; LICHENOMETRY ; LAKE ; LANDSCAPE ; VARIABILITY ; SURFACES ; SVALBARD ; RECORDS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199427
作者单位1.Dartmouth Coll, Dept Earth Sci, 6105 Fairchild Hall, Hanover, NH 03755 USA;
2.Dartmouth Coll, Inst Arctic Studies, Hanover, NH 03755 USA;
3.Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA
推荐引用方式
GB/T 7714
Heindel, Ruth C.,Culler, Lauren E.,Virginia, Ross A.. Rates and processes of aeolian soil erosion in West Greenland[J],2017,27(9):1281-1290.
APA Heindel, Ruth C.,Culler, Lauren E.,&Virginia, Ross A..(2017).Rates and processes of aeolian soil erosion in West Greenland.HOLOCENE,27(9),1281-1290.
MLA Heindel, Ruth C.,et al."Rates and processes of aeolian soil erosion in West Greenland".HOLOCENE 27.9(2017):1281-1290.
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