TY  - JOUR
A1  - Engels, Stefan
A1  - Brauer, Achim
A1  - Buddelmeijer, Nico
A1  - Martin-Puertas, Celia
A1  - Rach, Oliver
A1  - Sachse, Dirk
A1  - Van Geel, Bas
T1  - Subdecadal-scale vegetation responses to a previously unknown late-Allerod climate fluctuation and Younger Dryas cooling at Lake Meerfelder Maar (Germany)
JF  - Journal of quaternary science
N2  - Lake Meerfelder Maar (MFM) is the northernmost Western European sediment record with annual laminations across the Younger Dryas (YD), and the onset of the YD in the record of MFM has previously been defined as an increase in non-arboreal pollen abundance at ca. 12 680 varve a BP. Here we present a palynological record at unprecedented subdecadal resolution for MFM, covering the Allerod-YD transition. Our results show a fluctuation in pollen accumulation rates (PARs) before the onset of the YD, with lower rates between ca. 12 725 and 12 685 varve a BP. The fluctuation in PARs occurs simultaneous with a previously undescribed short fluctuation in sediment composition and varve thickness, as well as with changes in biogeochemical proxies. The combined evidence indicates signs of climatic instability ca. 45 years before the onset of the YD. The PAR records of Betula and Pinus furthermore show earlier and more abrupt changes at the onset of the YD than the percentage-records do. Finally, heliophilous herbaceous taxa show a delayed increase following the onset of the YD of ca. 145 years. This paper illustrates the potential to identify previously unrecognized climate variability and vegetation change when using subdecadal-resolution analyses. Copyright (C) 2016 John Wiley & Sons, Ltd.
KW  - climate instability
KW  - Lateglacial
KW  - Meerfelder Maar
KW  - pollen accumulation rates
KW  - vegetation change
Y1  - 2016
U6  - https://doi.org/10.1002/jqs.2900
SN  - 0267-8179
SN  - 1099-1417
VL  - 31
SP  - 741
EP  - 752
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -