Deglaciation chronology and glaciomarine successions in the Malangen–Målselv area, northern Norway

Eilertsen, Raymond S.; Corner, Geoffrey D.; Aasheim, Odd

doi:10.1080/03009480510013051

Cited by 18 publications

(21 citation statements)

References 49 publications

(40 reference statements)

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“…10 340 cal. yr BP) (Eilertsen et al, 2005). Malangen fjord -the recipient of the Dividalen and Målselv rivers -was influenced by glaciomarine conditions until ca.…”

Section: Deglaciationmentioning

confidence: 99%

Holocene vegetation and climate dynamics of the boreal alpine ecotone of northwestern Fennoscandia

Jensen

Vorren

2008

J Quaternary Science

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Climate change with respect to summer temperature throughout the Holocene is inferred from oscillations in the local Pinus sylvestris, Alnus incana and Betula pubescens forest-lines, as recorded by fossil pollen and plant macrofossils in lake sediments at four altitudinal levels. Mt Skrubben (848 m a.s.l.), in Dividalen, was deglaciated down to below 280 m a.s.l. during 10 800-10 300 cal. yr BP. Betula pubescens established 10100 cal. yr BP at 280 m a.s.l. and expanded up to near the summit during the next 700 years. Birch woodland prevailed on the mountain plateau until 3300 cal. yr BP. Local Pinus sylvestris stands are recorded up to 400 m a.s.l. at 8450 cal. yr BP and >548 m a.s.l. about 8160 cal. yr BP. Alnus incana expanded from 400 to nearly 790 m a.s.l. during the period 7900-7600 cal. yr BP. The maximum forest distribution lasted until ca. 6000 cal. yr BP. Marked climatic deteriorations caused lowering of the forest-lines around 4600 and 3000 cal. yr BP. Reconstruction of the summer temperature indicated mean July temperatures at 400 m a.s.l. of 1.5-38C above the present during the period of maximum forest expansion, whereas >38C above the present temperature at 548 m a.s.l. This is in accordance with other regional temperature reconstructions from northern Europe.

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“…10 340 cal. yr BP) (Eilertsen et al, 2005). Malangen fjord -the recipient of the Dividalen and Målselv rivers -was influenced by glaciomarine conditions until ca.…”

Section: Deglaciationmentioning

confidence: 99%

Holocene vegetation and climate dynamics of the boreal alpine ecotone of northwestern Fennoscandia

Jensen

Vorren

2008

J Quaternary Science

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“…Their resulting chronology spans the time of glacier retreat from the shelf edge to the innermost fjords. We have adjusted this chronology for the Preboreal (Stordal I, II and III), based on more detailed radiocarbon and shoreline correlation dating of Preboreal moraines in Lyngen-Storfjord (Corner, 1980) and Malangen-Målselv (Eilertsen et al, 2005), where two major, and one minor, climatically controlled moraine sub-stages and several topographically controlled ice-front accumulations have been recognised. Based on this body of work, the resulting chronology (in cal.…”

mentioning

confidence: 99%

Asynchronous response of marine-terminating outlet glaciers during deglaciation of the Fennoscandian Ice Sheet

Stokes

Corner

Winsborrow

et al. 2014

Geology

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'Asynchronous response of marine-terminating outlet glaciers during deglaciation of the Fennoscandian Ice Sheet. ', Geology., 42 (5). pp. 455-458. Further information on publisher's website:http://dx.doi.org/10.1130/G35299.1Publisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract: Recent studies have highlighted the dynamic behavior of marine-terminating outlet glaciers over decadal time-scales, linked to both atmospheric and oceanic warming. This helps explain episodes of near-synchronous flow acceleration, thinning and retreat, but non-climatic factors such as subglacial overdeepenings can also induce rapid recession. There is support for these topographic controls on glacier retreat, but there are few long-term records to assess their significance across a population of glaciers over millennial time-scales. Here, we present retreat chronologies alongside topographic data for eight major outlet glaciers that experienced similar climatic forcing during deglaciation of the Fennoscandian Ice Sheet (ca. 18-10 cal. kyr B.P.). Retreat rates averaged over several millennia (~30 m a-1) are less than half those recently observed on modern-day outlet glaciers (>100 m a-1), but deglaciation was punctuated by episodes of more rapid retreat (up to ~150 m a-1) and re-advances. Significantly, phases of rapid retreat were not synchronous between glaciers and most occurred irrespective of any obvious atmospheric warming. We interpret this to reflect the complex interplay between external forcing and both topographic (e.g., bathymetry, width) and glaciological factors (e.g., ice catchments) that evolve through time, but conclude that basal over-deepenings in wide fjords induce episodes of rapid retreat (>100 m a-1), further exacerbated by their greater susceptibility to oceanic warming. This complicates attempts to predict the centennial-scale trajectory of outlet glaciers and suggests that modeling the interaction between neighboring catchments and the accurate description of subglacial topography beneath them is a priority for future work.Response to Reviewers: See attached cover letter and response to reviewer comments Powered by Editorial Manager® and ProduXion Manager® from Aries Systems CorporationPublisher: GSA Journal: GEOL: Geology Article ID: G35299 Recent studies have highlighted the dynamic behavior of marine-terminating 11 outlet glaciers over decadal time-scales, linked to both atmospheric and oceanic warming. 12This helps explain episodes of near-synchronous flow acc...

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“…For detailed description of the valley deposits and of the geological evolution of the Målselv valley, see Eilertsen (2002) and Eilertsen et al (2005Eilertsen et al ( , 2006. The area has also been subject to mapping of recent and old slide scars and active erosion (Hansen et al 2002), and the distribution of slide scars is compared to the overall valley fill (Eilertsen and Hansen 2004).…”

Section: Settingmentioning

confidence: 99%

Stratigraphic evaluation of a Holocene clay-slide in Northern Norway

et al. 2007

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An almost 6,000 years old slide in marine clay at Fossmoen, Northern Norway is studied to: characterize the scar, the slide deposits and the slide event; evaluate the role that stratigraphic variations played for failure; and view the slide event within long-term landscape development. A geological model for the area is based on drilling, outcrops and ground-penetrating radar with emphasis on the stratigraphic variations of fjord deposits. The slide's age implies that the deposits were sensitive already shortly after emergence above sea level, and layers are still sensitive. River incision was probably responsible for the initial slide, whereas stratigraphy and groundwater movement controlled the location and shape of the scar. Laminated, inclined and discontinuous bedding are suggested as playing different roles for ground-water flow and pore pressures, adding to existing models on the development of soft and sensitive layers prone to sliding.

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Deglaciation chronology and glaciomarine successions in the Malangen–Målselv area, northern Norway

Cited by 18 publications

References 49 publications

Holocene vegetation and climate dynamics of the boreal alpine ecotone of northwestern Fennoscandia

Holocene vegetation and climate dynamics of the boreal alpine ecotone of northwestern Fennoscandia

Asynchronous response of marine-terminating outlet glaciers during deglaciation of the Fennoscandian Ice Sheet

Stratigraphic evaluation of a Holocene clay-slide in Northern Norway

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