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Statements

Subject Item
n2:RIV%2F00025798%3A_____%2F12%3A00000211%21RIV13-MZP-00025798
rdf:type
n14:Vysledek skos:Concept
dcterms:description
Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change on a centennial timescale. This paper analyses the topography, geomorphology and sedimentology of prominent moraines on James Ross Island, Antarctica, to determine geometric changes and to interpret glacier behaviour. The moraines are very likely due to a late-Holocene phase of advance and featured (1) shearing and thrusting within the snout, (2) shearing and deformation of basal sediment, (3) more supraglacial debris than at present and (4) short distances of sediment transport. Retreat of 100m and thinning of 15–20m has produced a loss of 0.1km3 of ice. The pattern of surface lowering is asymmetric. These geometrical changes are suggested most simply to be due to a net negative mass balance caused by a drier climate. Comparisons of the moraines with the current glaciological surface structure of the glaciers permits speculation of a transition from a polythermal to a cold-based thermal regime. Small land-terminating glaciers in the northern Antarctic Peninsula region could be cooling despite a warming climate. Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change on a centennial timescale. This paper analyses the topography, geomorphology and sedimentology of prominent moraines on James Ross Island, Antarctica, to determine geometric changes and to interpret glacier behaviour. The moraines are very likely due to a late-Holocene phase of advance and featured (1) shearing and thrusting within the snout, (2) shearing and deformation of basal sediment, (3) more supraglacial debris than at present and (4) short distances of sediment transport. Retreat of 100m and thinning of 15–20m has produced a loss of 0.1km3 of ice. The pattern of surface lowering is asymmetric. These geometrical changes are suggested most simply to be due to a net negative mass balance caused by a drier climate. Comparisons of the moraines with the current glaciological surface structure of the glaciers permits speculation of a transition from a polythermal to a cold-based thermal regime. Small land-terminating glaciers in the northern Antarctic Peninsula region could be cooling despite a warming climate.
dcterms:title
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica
skos:prefLabel
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica
skos:notation
RIV/00025798:_____/12:00000211!RIV13-MZP-00025798
n14:predkladatel
n15:ico%3A00025798
n3:aktivita
n18:P
n3:aktivity
P(GA205/09/1876), P(SPII1A9/23/07)
n3:cisloPeriodika
212
n3:dodaniDat
n8:2013
n3:domaciTvurceVysledku
n7:3280314
n3:druhVysledku
n16:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
146524
n3:idVysledku
RIV/00025798:_____/12:00000211
n3:jazykVysledku
n19:eng
n3:klicovaSlova
glacier retreat, rheology, land-terminating glaciers, Late Holocene, James Ross Island, Antarctica
n3:klicoveSlovo
n5:James%20Ross%20Island n5:land-terminating%20glaciers n5:glacier%20retreat n5:rheology n5:Late%20Holocene n5:Antarctica
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[2F6D39B5E72F]
n3:nazevZdroje
Journal of Glaciology
n3:obor
n10:DE
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:projekt
n13:GA205%2F09%2F1876 n13:SPII1A9%2F23%2F07
n3:rokUplatneniVysledku
n8:2012
n3:svazekPeriodika
58
n3:tvurceVysledku
Glasser, Neil Nývlt, Daniel Carrivick, Jonathan Hambrey, Mike Davies, Bethan
n3:wos
000312479400013
s:issn
0022-1430
s:numberOfPages
15
n11:doi
10.3189/2012JoG11J148