TY  - JOUR
A1  - Palagushkina, Olga V.
A1  - Wetterich, Sebastian
A1  - Schirrmeister, Lutz
A1  - Nazarova, Larisa B.
T1  - Modern and fossil diatom assemblages from Bol’shoy Lyakhovsky Island (New Siberian Archipelago, Arctic Siberia)
JF  - Contemporary Problems of Ecology
N2  - This article discusses the results of a taxonomic and ecological investigation of diatoms from polygonal ponds and Quaternary permafrost deposits of Bol’shoy Lyakhovsky Island (New Siberian Archipelago) and the reconstruction of climatic changes on the Island during late Pleistocene/Holocene transition using fossil diatom assemblages from the permafrost deposits. The taxonomic list of diatoms includes 159 diatom species. The main ecological factors that determine the distribution of diatoms in the investigated data set are mean July air temperature, рН, electrical conductivity, water depth, and concentrations of Si4+ and Al3+. An increase in water depth and stable lacustrine conditions in the Lateglacial–Holocene in the ancient thermokarst lake relate to Lateglacial warming before 11860 ± 160 years BP and during the early Holocene between 11210 ± 160 and 7095 ± 60 years BP.
KW  - Pleistocene
KW  - Holocene
Y1  - 2017
U6  - https://doi.org/10.1134/S1995425517040060
SN  - 1995-4255
SN  - 1995-4263
VL  - 10
SP  - 380
EP  - 394
PB  - Pleiades Publ.
CY  - New York
ER  - 
TY  - JOUR
A1  - Weber, Michael
A1  - Scholz, Denis
A1  - Schröder-Ritzrau, Andrea
A1  - Deininger, Michael
A1  - Spötl, Christoph
A1  - Lugli, Federico
A1  - Mertz-Kraus, Regina
A1  - Jochum, Klaus Peter
A1  - Fohlmeister, Jens Bernd
A1  - Stumpf, Cintia F.
A1  - Riechelmann, Dana F. C.
T1  - Evidence of warm and humid interstadials in central Europe during early MISSUE 3 revealed by a multi-proxy speleothem record
JF  - Quaternary science reviews : the international multidisciplinary research and review journal
N2  - Marine Isotope Stage 3 (MIS 3, 57-27 ka) was characterised by numerous rapid climate oscillations (i.e., Dansgaard-Oeschger (D/O-) events), which are reflected in various climate archives. So far, MIS 3 speleothem records from central Europe have mainly been restricted to caves located beneath temperate Alpine glaciers or close to the Atlantic Ocean. Thus, MIS 3 seemed to be too cold and dry to enable speleothem growth north of the Alps in central Europe. Here we present a new speleothem record from Bunker Cave, Germany, which shows two distinct growth phases from 52.0 (+0.8, -0.5) to 50.9 (+0.6, -1.3) ka and 473 (+1.0, -0.6) to 42.8 (+/- 0.9) ka, rejecting this hypothesis. These two growth phases potentially correspond to the two warmest and most humid phases in central Europe during MIS 3, which is confirmed by pollen data from the nearby Eifel. The hiatus separating the two phases is associated with Heinrich stadial 5 (HS 5), although the growth stop precedes the onset of HS 5. The first growth phase is characterised by a fast growth rate, and Mg concentrations and Sr isotope data suggest high infiltration and the presence of soil cover above the cave. The second growth phase was characterised by drier, but still favourable conditions for speleothem growth. During this phase, the delta C-13 values show a significant decrease associated with D/O-event 12. The timing of this shift is in agreement with other MIS 3 speleothem data from Europe and Greenland ice core data. (C) 2018 Elsevier Ltd. All rights reserved.
KW  - Speleothems
KW  - Pleistocene
KW  - Palaeoclimatology
KW  - Europe
KW  - Dansgaard-Oeschger event
KW  - Marine isotope stage 3
KW  - Bunker cave
KW  - Multi-proxy approach
KW  - U-Th series
Y1  - 2018
U6  - https://doi.org/10.1016/j.quascirev.2018.09.045
SN  - 0277-3791
VL  - 200
SP  - 276
EP  - 286
PB  - Elsevier
CY  - Oxford
ER  -