Topographic controls on glacier sediment–landform associations around the temperate North Patagonian Icefield

Glasser, Neil F.; Harrison, Stephan; Jansson, Krister N.

doi:10.1016/j.quascirev.2009.07.011

Cited by 33 publications

(17 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Identification of glacially associated landforms from remote images is well established Glasser et al , 2009aGlasser et al , 2009b. Remotely sensed structural glaciological mapping followed standard procedures (Hambrey & Dowdeswell 1994, 2000Glasser et al 1998Glasser et al , 2011Hambrey et al 2005).…”

Section: Methodsmentioning

confidence: 99%

“…The fast-flowing temperate glaciers of the Northern Patagonian Icefield (478S) produce large volumes of meltwater, which rapidly rework and remove fines generated subglacially. Subglacial landforms, such as drumlins, flutes, eskers or crevasse-squeeze rides, are rare (Glasser et al 2009a). The large volume of meltwater results in numerous glaciofluvial ice-contact landforms, with abundant kame terraces, glacial lakes and raised lake shorelines, and rapid reworking of subglacially deposited sediments and landforms.…”

Section: Glacial -Paraglacial -Periglacial Interactionsmentioning

confidence: 99%

See 1 more Smart Citation

Landscape evolution and ice-sheet behaviour in a semi-arid polar environment: James Ross Island, NE Antarctic Peninsula

Davies

Glasser

Carrivick

et al. 2013

Self Cite

118

View full text Add to dashboard Cite

Davies, B. J., Glasser, N., Carrivick, J. L., Hambrey, M. J., Smellie, J. S., Nyvlt, D. (2013). Landscape evolution and ice-sheet behaviour in a semi-arid polar environment: James Ross Island, NE Antarctic Peninsula. Geological Society Special Publication.This study of landscape evolution presents both new modern and palaeo process-landform data, and analyses the behaviour of the Antarctic Peninsula Ice Sheet through the Last Glacial Maximum (LGM), the Holocene and to the present day. Six sediment-landform assemblages are described and interpreted for Ulu Peninsula, James Ross Island, NE Antarctic Peninsula: (1) the Glacier Ice and Snow Assemblage; (2) the Glacigenic Assemblage, which relates to LGM sediments and comprises both erratic-poor and erratic-rich drift, deposited by cold-based and wet-based ice and ice streams respectively; (3) the Boulder Train Assemblage, deposited during a Mid-Holocene glacier readvance; (4) the Ice-cored Moraine Assemblage, found in front of small cirque glaciers; (5) the Paraglacial Assemblage including scree, pebble-boulder lags, and littoral and fluvial processes; and (6) the Periglacial Assemblage including rock glaciers, protalus ramparts, blockfields, solifluction lobes and extensive patterned ground. The interplay between glacial, paraglacial and periglacial processes in this semi-arid polar environment is important in understanding polygenetic landforms. Crucially, cold-based ice was capable of sediment and landform genesis and modification. This landsystem model can aid the interpretation of past environments, but also provides new data to aid the reconstruction of the last ice sheet to overrun James Ross Island.Peer reviewe

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Glacial -Paraglacial -Periglacial Interactionsmentioning

confidence: 99%

Landscape evolution and ice-sheet behaviour in a semi-arid polar environment: James Ross Island, NE Antarctic Peninsula

Davies

Glasser

Carrivick

et al. 2013

Self Cite

118

View full text Add to dashboard Cite

show abstract

“…Snow and ice meltwater from the NPI, mainly from the Soler glacier and other smaller outlet glaciers drain into Lago Plomo and transport fluvioglacial sediments into the lake. Glasser et al (2009) reported that the Soler glacier (50 km 2 , visited in ad 2000) is a land-terminating glacier, but currently recedes into a shallow moraine-dammed proglacial lake. The glacier formed a low, cross-valley proglacial moraine, ice scoured bedrock and extensive sandar deposits on the major ice discharge route.…”

Section: Study Areamentioning

confidence: 99%

“…The glacier formed a low, cross-valley proglacial moraine, ice scoured bedrock and extensive sandar deposits on the major ice discharge route. These glaciofluvial outwash plains are composed of rounded sandy gravel or sand present at the valley floor (Glasser et al, 2009). The course of the river Soler is very variable, which is shown by several old courses on the outwash plain.…”

Section: Study Areamentioning

confidence: 99%

Quantitative high-resolution winter (JJA) precipitation reconstruction from varved sediments of Lago Plomo 47°S, Patagonian Andes, ad 1530–2002

et al. 2011

View full text Add to dashboard Cite

High-resolution climate reconstructions from a range of natural archives across the world are fundamental to place current climate change into perspective. Paleoclimate records for the Southern Hemisphere are scarce and only a few quantitative high-resolution reconstructions exist for the past millennium. We present a record of annually laminated sediments of Lago Plomo (46°59'S, 72°52'W,203 m a.s.l.) located east of the Northern Patagonian Ice Field (NPI). Radiometric dating ( 210 Pb, 137 Cs, 14 C AMS) is consistent with counts of millimetre-scale laminae, confirming the annual nature of the laminae couplets with a light summer and a dark winter layer. The varves were analyzed for thickness, mass accumulation rate (MAR), scanning x-ray fluorescence (XRF) and scanning reflectance spectroscopy in the visible range (VIS-RS). MAR data were calibrated against austral winter (JJA) precipitation data (CRU TS 3.0) for the period ad 1930-2002 (r = 0.67, p (aut) < 0.05). Using a linear inverse regression model we reconstructed winter precipitation for Lago Plomo back to ad 1530. The root mean squared error of prediction (RMSEP) is small (13.3 mm/month; 12% of the average precipitation) compared with the pronounced decadal and multidecadal variability, suggesting that most of the reconstructed variability is significant. Wetter phases (reference ad 1930-2002) were observed around ad 1600, ad 1630-1690 and ad 1780-1850, and a prolonged drier period ad 1690-1780 with a multidecadal minimum centered on ad 1770. The spatial correlation for South America suggests that the JJA precipitation record from Lago Plomo is representative for large areas in the southwest between c. 41°S and 51°S.

show abstract

“…Moreover, geomorphological studies, including glacial land-system approaches, have enabled detailed reconstructions of former ice dynamics Darvill, Stokes, Bentley, Evans, & Lovell, 2016;Lovell, Stokes, Bentley, & Benn, 2012). Whilst such methods have been applied in southernmost Patagonia, around central Patagonia and the North Patagonian Icefield (NPI) (∼46-48°S) previous work has focused on constraining the timing of glacial fluctuations, with less attention given to the detailed nature of landform-sediment assemblages (Glasser, Harrison, & Jansson, 2009). Therefore, we aim to produce a comprehensive map of the glacial geomorphology related to two major ice lobes of central Patagonia.…”

Section: Introductionmentioning

confidence: 99%

The glacial geomorphology of the Lago Buenos Aires and Lago Pueyrredón ice lobes of central Patagonia

2017

View full text Add to dashboard Cite

This paper presents a glacial geomorphological map of landforms produced by the Lago General Carrera-Buenos Aires and Lago Cochrane-Pueyrredón ice lobes of the former Patagonian Ice Sheet. Over 35,000 landforms were digitized into a Geographical Information System from high-resolution (<15 m) satellite imagery, supported by field mapping. The map illustrates a rich suite of ice-marginal glacigenic, subglacial, glaciofluvial and glaciolacustrine landforms, many of which have not been mapped previously (e.g. hummocky terrain, till eskers, eskers). The map reveals two principal landform assemblages in the central Patagonian landscape: (i) an assemblage of nested latero-frontal moraine arcs, outwash plains or corridors, and inset hummocky terrain, till eskers and eskers, which formed when major ice lobes occupied positions on the Argentine steppe; and (ii) a lake-terminating system, dominated by the formation of glaciolacustrine landforms (deltas, shorelines) and localized ice-contact glaciofluvial features (e.g. outwash fans), which prevailed during deglaciation. ARTICLE HISTORY

show abstract

Topographic controls on glacier sediment–landform associations around the temperate North Patagonian Icefield

Cited by 33 publications

References 69 publications

Landscape evolution and ice-sheet behaviour in a semi-arid polar environment: James Ross Island, NE Antarctic Peninsula

Landscape evolution and ice-sheet behaviour in a semi-arid polar environment: James Ross Island, NE Antarctic Peninsula

Quantitative high-resolution winter (JJA) precipitation reconstruction from varved sediments of Lago Plomo 47°S, Patagonian Andes, ad 1530–2002

The glacial geomorphology of the Lago Buenos Aires and Lago Pueyrredón ice lobes of central Patagonia

Contact Info

Product

Resources

About