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Sökning: onr:"swepub:oai:DiVA.org:su-188102" > Ice surface changes...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003896naa a2200505 4500
001oai:DiVA.org:su-188102
003SwePub
008210111s2020 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1881022 URI
0247 a https://doi.org/10.1016/j.quascirev.2020.1066362 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Andersen, J. L.4 aut
2451 0a Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica
264 1b Elsevier BV,c 2020
338 a print2 rdacarrier
520 a Reconstructing past ice-sheet surface changes is key to testing and improving ice-sheet models. Data constraining the past behaviour of the East Antarctic Ice Sheet are sparse, limiting our understanding of its response to past, present and future climate change. Here, we report the first cosmogenic multinuclide (Be-10, Al-26, Cl-36) data from bedrock and erratics on nunataks along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica. Spanning elevations between 741 and 2394 m above sea level, the samples have apparent exposure ages between 2 ka and 5 Ma. The highest-elevation bedrock sample indicates (near-) continuous minimum exposure since the Pliocene, with a low apparent erosion rate of 0.15 +/- 0.03 m Ma(-1), which is similar to results from eastern Dronning Maud Land. In contrast to studies in eastern Dronning Maud Land, however, our data show clear indications of a thicker-than-present ice sheet within the last glacial cycle, with a thinning of similar to 35-120 m during the Holocene (similar to 2-11 ka). Difficulties in separating suitable amounts of quartz from the often quartz-poor rock-types in the area, and cosmogenic nuclides inherited from exposure prior to the last deglaciation, prevented robust thinning estimates from elevational profiles. Nevertheless, the results clearly demonstrate ice-surface fluctuations of several hundred meters between the current grounding line and the edge of the polar plateau for the last glacial cycle, a constraint that should be considered in future ice-sheet model simulations.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
653 a Antarctica
653 a Glaciation
653 a Quaternary
653 a Cosmogenic isotopes
653 a Dronning Maud Land
7001 a Newall, Jennifer C.u Stockholms universitet,Institutionen för naturgeografi,Purdue University, USA4 aut0 (Swepub:su)jnewa
7001 a Blomdin, Robinu Stockholms universitet,Institutionen för naturgeografi4 aut0 (Swepub:su)robl3954
7001 a Sams, S. E.4 aut
7001 a Fabel, D.4 aut
7001 a Koester, A. J.4 aut
7001 a Lifton, N. A.4 aut
7001 a Fredin, O.4 aut
7001 a Caffee, M. W.4 aut
7001 a Glasser, Neil F.4 aut
7001 a Rogozhina, I.4 aut
7001 a Suganuma, Y.4 aut
7001 a Harbor, Jonathan M.u Stockholms universitet,Institutionen för naturgeografi,Purdue University, USA; Purdue University Global, USA4 aut0 (Swepub:su)jharb
7001 a Stroeven, Arjen P.u Stockholms universitet,Institutionen för naturgeografi4 aut0 (Swepub:su)stroe
7102 a Stockholms universitetb Institutionen för naturgeografi4 org
7730 t Quaternary Science Reviewsd : Elsevier BVg 249q 249x 0277-3791x 1873-457X
8564 u http://manuscript.elsevier.com/S0277379120305989/pdf/S0277379120305989.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-188102
8564 8u https://doi.org/10.1016/j.quascirev.2020.106636

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