Evidence for higher-than-average air temperatures after the 8.2 ka event provided by a Central European δ18O record
PBN-AR
Instytucja
Wydział Biologii (Uniwersytet Gdański)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Quaternary Science Reviews (45pkt w roku publikacji)
ISSN
0277-3791
EISSN
Wydawca
DOI
URL
Rok publikacji
2017
Numer zeszytu
Strony od-do
96-108
Numer tomu
172
Liczba arkuszy
0.6
Autorzy
(liczba autorów: 13)
Pozostali autorzy
+ 12
Słowa kluczowe
en
Holocene
palaeoclimatology
Europe
stable isotopes
8.2 ka event
lake sediments
Streszczenia
Język
en
Treść
The so-called 8.2 ka event represents one of the most prominent cold climate anomalies during the Holocene warm period. Accordingly, several studies have addressed its trigger mechanisms, absolute dating and regional characteristics so far. However, knowledge about subsequent climate recovery is still limited although this might be essential for the understanding of rapid climatic changes. Here we present a new sub-decadally resolved and precisely dated oxygen isotope (δ18O) record for the interval between 7.7 and 8.7 ka BP (103 calendar years before AD 1950), derived from the calcareous valves of benthic ostracods preserved in the varved lake sediments of pre-Alpine Mondsee (Austria). Besides a clear reflection of the 8.2 ka event, showing a good agreement in timing, duration and magnitude with other regional stable isotope records, the high-resolution Mondsee lake sediment record provides evidence for a 75-year-long interval of higher-than-average δ18O values directly after the 8.2 ka event, possibly reflecting increased air temperatures in Central Europe. This observation is consistent with evidence from other proxy records in the North Atlantic realm, thus most probably reflecting a hemispheric-scale climate signal rather than a local phenomenon. As a possible trigger we suggest an enhanced resumption of the Atlantic meridional overturning circulation (AMOC), supporting assumptions from climate model simulations.
Inne
System-identifier
UOG91473ad3983d4043862aa15fbda26082
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