First attempt to combine terrestrial cosmogenic nuclide (10Be) and Schmidt hammer relative-age dating: Strauchon Glacier, Southern Alps, New Zealand

Winkler, Stefan

doi:10.2478/v10085-009-0026-3

Cited by 31 publications

(65 citation statements)

References 53 publications

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“…To obtain numerical age estimates using the technique requires independent dating control to generate R‐value calibration curves (i.e. to convert R‐values to numerical ages) (see Winkler, ; Matthews and Owen, ). Recently, Tomkins et al .…”

Section: Methodsmentioning

confidence: 99%

Younger Dryas glaciers and climate in the Mourne Mountains, Northern Ireland

Barr

Roberson

Flood

et al. 2017

J Quaternary Science

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Here, we present evidence to suggest that the Mourne Mountains, Northern Ireland, were last occupied by glaciers during the Younger Dryas Stadial. The margins of these glaciers are marked by moraines, chronologically constrained to the Younger Dryas by Schmidt hammer exposure dating. Reconstructions indicate that these glaciers had equilibrium‐line altitudes (ELAs) ranging from 356 ± 33 m (a.s.l.) to 570 ± 9 m (a.s.l.), with a mean of 475 ± 36 m (a.s.l.). ELAs rise from west to east, probably reflecting the contribution of windblown snow and ice to the accumulation of Younger Dryas glaciers in the western Mournes. Taking this into consideration, a mean ‘climatic’ ELA of 529 ± 4 m (a.s.l.) is calculated for the mountains as a whole. Assuming a mean annual sea level air temperature of −8 °C, and an annual temperature range of 34 °C, degree‐day modelling suggests that during the Younger Dryas, accumulation at the ‘climatic’ ELA of glaciers in the Mournes was 846–990 mm a−1. This suggests increased aridity, relative to present, and is consistent with other parts of NW Europe, where reduced precipitation alongside notable cooling is thought to reflect increased North Atlantic sea ice extent during the Younger Dryas.

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Section: Methodsmentioning

confidence: 99%

Younger Dryas glaciers and climate in the Mourne Mountains, Northern Ireland

Barr

Roberson

Flood

et al. 2017

J Quaternary Science

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“…The Schmidt hammer has been used frequently since the 1980s (cf. Goudie, ) in chronostratigraphical studies in glacial and peri‐glacial environments for the relative dating of the surface of moraines (Evans et al , ; Shakesby et al , ; Winkler, ), pronival ramparts (Matthews et al , ) and rock glaciers (Frauenfelder et al , ; Kellerer‐Pirklbauer et al , ; Scapozza et al , ). When R ‐values of two or more surfaces of known age are available, the Schmidt hammer exposure‐ages may be calibrated using a linear regression as suggested by Kellerer‐Pirklbauer (), Matthews and Owen () and Shakesby et al () or a curvilinear relationship if the median R ‐values are a power law function of exposure age as suggested by Stahl et al ().…”

Section: Methodsmentioning

confidence: 99%

Assessing the rock glacier kinematics on three different timescales: a case study from the southern Swiss Alps

Scapozza

Lambiel

Bozzini³

et al. 2014

Earth Surf Processes Landf

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Surface temperature increases since the 1990s have often been associated with an increase in the speed of rock glaciers. Evidence of similar links on the centennial to millennial scale are, however, still lacking due to less focus to date on the medium-and long-term kinematics of these landforms. In order to assess (palaeo)climatic variations in rock glacier kinematics, we analysed the movements of the Stabbio di Largario rock glacier in the southern Swiss Alps using three different timescales. The Schmidt hammer exposure-age dating (SHD) was applied to study long-term kinematics in order to extrapolate the minimal age of the formation of the rock glacier, which may have started its development after the Mid-Holocene climate optimum, and to detect possible accelerations of the horizontal surface velocity during the Medieval Warm Period. Georeferentiation and orthorectification of six historical photographs of the rock glacier taken between AD 1910 and today were analysed using monoplotting to detect the rock glacier displacement on the decennial scale from the end of the Little Ice Age. Finally, differential global positioning system (dGPS) monitoring data available since AD 2009 were used to assess annual and seasonal creep rates of the rock glacier at present. Our results show a link between the periods of increase in mean air temperature on different timescales and variations in rock glacier kinematics and provide important new insights into rock glacier development and evolution on the long-term scale.

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“…Such correlations may be possible with the assistance of quantitative Schmidt hammer rebound-hardness comparisons (e.g. Winkler, 2009), and this will be considered for further field visits.…”

Section: Off-set Moraine Ridgesmentioning

confidence: 99%