TY  - JOUR
A1  - Warken, Sophie Friederike
A1  - Fohlmeister, Jens Bernd
A1  - Schröder-Ritzrauh, Andrea
A1  - Constantin, Silviu
A1  - Spötl, Christoph
A1  - Gerdes, Axel
A1  - Esper, Jan
A1  - Frank, Norbert
A1  - Arps, Jennifer
A1  - Terente, Mihai
A1  - Riechelmann, Dana Felicitas Christine
A1  - Mangini, Augusto
A1  - Scholz, Denis
T1  - Reconstruction of late Holocene autumn/winter precipitation variability in SW Romania from a high-resolution speleothem trace element record
JF  - Earth & planetary science letters
N2  - We present the first high-resolution trace element (Mg/Ca, Sr/Ca, Ba/Ca) record from a stalagmite in southwestern Romania covering the last 3.6 ka, which provides the potential for quantitative climate reconstruction. Precise age control is based on three independent dating methods, in particular for the last 250 yr, where chemical lamina counting is combined with the identification of the 20th century radiocarbon bomb peak and Th-230/U dating. Long-term cave monitoring and model simulations of drip water and speleothem elemental variability indicate that precipitation-related processes are the main drivers of speleothem Mg/Ca ratios. Calibration against instrumental climate data shows a significant anti-correlation of speleothem Mg/Ca ratios with autumn/winter (October to March) precipitation (r = -0.61, p < 0.01), which is statistically robust when considering age uncertainties and auto-correlation. This relationship is used to develop a quantitative reconstruction of autumn/winter precipitation. During the late Holocene, our data suggest a heterogeneous pattern of past regional winter hydroclimate in the Carpathian/Balkan realm, along with intermittent weakening of the dominant influence of North Atlantic forcing. In agreement with other regional paleo-hydrological reconstructions, the observed variability reveals periodically occurring strong NW-SE hydro-climate gradients. We hypothesize, that this pattern is caused by shifts of the eastern edge of the area of influence of the NAO across central eastern Europe due to the confluence of North Atlantic forcing, and other climatic features such as the East Atlantic/Western Russia (EAWR) pattern. (C) 2018 Elsevier B.V. All rights reserved.
KW  - speleothem
KW  - trace elements
KW  - proxy calibration
KW  - precipitation reconstruction
KW  - Romania
KW  - North Atlantic forcing
Y1  - 2018
U6  - https://doi.org/10.1016/j.epsl.2018.07.027
SN  - 0012-821X
SN  - 1385-013X
VL  - 499
SP  - 122
EP  - 133
PB  - Elsevier
CY  - Amsterdam
ER  -