Universität zu Köln

Berg, Sonja, Melles, Martin ORCID: 0000-0003-0977-9463, Gore, Damian B., Verkulich, Sergei and Pushina, Zina V. (2020). Postglacial evolution of marine and lacustrine water bodies in Bunger Hills. Antarct. Sci., 32 (2). S. 107 - 130. NEW YORK: CAMBRIDGE UNIV PRESS. ISSN 1365-2079

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Abstract

Unglaciated coastal areas in East Antarctica provide records of past ice sheet and glacier fluctuations and subsequent environmental conditions. In this paper we review lithological, geochemical, diatom and radiocarbon data from sediment records from inland and epishelf lakes in Bunger Hills, East Antarctica. While some hilltops were unglaciated during the Last Glacial Maximum, till deposits in lake basins indicate infilling by glacier ice prior to the Holocene. Proglacial sedimentation occurred in lakes during the early Holocene. Around 9.6 ka bp, deposition of marine sapropel started under relatively warm climate conditions. Inland lakes were affected by high clastic input from meltwater runoff until c. 7.9 ka bp, when deposition became highly organic and biogenic proxies indicate a period of cooler conditions. Epishelf lakes experienced a decrease in water exchange with the ocean and increased freshwater input around 7.7 +/- 0.2 ka bp and after 2.2 ka bp. This probably resulted from grounding line advances of the bounding glaciers, which could be either controlled by relative sea level (RSL) lowering and/or climate-driven glacier dynamics. The absence of marine sediments in the postglacial record of Algae Lake indicates that Holocene RSL probably reached a maximum at or below 10 m above present sea level.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Berg, Sonja UNSPECIFIED UNSPECIFIED UNSPECIFIED Melles, Martin UNSPECIFIED orcid.org/0000-0003-0977-9463 UNSPECIFIED Gore, Damian B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Verkulich, Sergei UNSPECIFIED UNSPECIFIED UNSPECIFIED Pushina, Zina V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-339800
DOI:	10.1017/S0954102019000476
Journal or Publication Title:	Antarct. Sci.
Volume:	32
Number:	2
Page Range:	S. 107 - 130
Date:	2020
Publisher:	CAMBRIDGE UNIV PRESS
Place of Publication:	NEW YORK
ISSN:	1365-2079
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOUTHERN WINDMILL ISLANDS; ANTARCTIC ICE-SHEET; VESTFOLD HILLS; DIATOM ASSEMBLAGES; EAST ANTARCTICA; SALINE LAKES; SEDIMENTS; RADIOCARBON; CALIBRATION; DEGLACIATION Multiple languages Environmental Sciences; Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33980