TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Zolitschka, Bernd
A1  - Fey, Michael
A1  - Janssen, Stephanie
A1  - Maidana, Nora I
A1  - Mayr, Christoph
A1  - Wulf, Sabine
A1  - Haberzettl, Torsten
A1  - Corbella, Hugo
A1  - Lücke, Andreas
A1  - Ohlendorf, Christian
A1  - Schäbitz, Frank
T1  - Southern Hemispheric Westerlies control sedimentary processes of Laguna Azul (south-eastern Patagonia, Argentina)
JF  - The Holocene
N2  - Multiproxy investigations of lacustrine sediments from Laguna Azul (52 °S) document multi-millennial Holocene influences of Southern Hemispheric Westerlies (SHW) on the hydroclimatic variability of south-eastern Patagonia. During the last 4000 years, this hydroclimatic variability is overprinted by centennial warm/dry periods. A cool/wet period from 11,600 to 10,100 cal. BP is succeeded by an early Holocene dry period (10,100–8300 cal. BP) with a shallow lake, strong anoxia, methanogenesis and high salinity. Between 8300 and 4000 cal. BP the influence of SHW weakened, resulting in a freshwater lake considered to be related to less arid conditions. Since 4000 cal. BP, regional temperature decreased accompanied by re-intensification of SHW reaching full strength since 3000 cal. BP. Centred around 2200, 1000 cal. BP and in the 20th century, Laguna Azul experienced century-long warm/dry spells. Between these dry periods, two pronounced moist periods are suggested to be contemporaneous to the ‘Dark Age Cold Period’ and the ‘Little Ice Age’. Different from millennial SHW variations, centennial fluctuations appear to be synchronous for South America and the Northern Hemisphere. Changes in solar activity, large volcanic eruptions and/or modulations of ocean circulation are potential triggers for this synchronicity.
KW  - -
KW  - Dark Ages Cold Period (DACP)
KW  - ectogenic meromixis
KW  - Holocene climate change
KW  - lake-level fluctuations
KW  - ‘Little Ice Age’ (LIA)
KW  - Medieval Climate Anomaly (MCA)
KW  - Roman Climate Anomaly (RCA)
KW  - salinity changes
KW  - tephra layers
KW  - XRF scanning
Y1  - 2019
UN  - https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-37752
SN  - 0959-6836
SS  - 0959-6836
SN  - 1477-0911
SS  - 1477-0911
U6  - https://doi.org/10.1177/0959683618816446
DO  - https://doi.org/10.1177/0959683618816446
VL  - 29
IS  - 3
SP  - 403
EP  - 420
PB  - SAGE Publications
CY  - Sage UK: London, England
ER  -