In:
Climate of the Past, Copernicus GmbH, Vol. 16, No. 4 ( 2020-07-03), p. 1145-1157
Abstract:
Abstract. Several climate oscillations have been reported from the
early Holocene superepoch, the best known of which is the Preboreal
oscillation (PBO). It is still unclear how the PBO and the number of climate
oscillations observed in Greenland ice cores and European terrestrial
records are related to one another. This is mainly due to uncertainties in
the chronologies of the records. Here, we present new, high-resolution
10Be concentration data from the varved Meerfelder Maar sediment record
in Germany, spanning the period 11 310–11 000 years BP. These new data allow
us to synchronize this well-studied record, as well as Greenland ice core
records, with the IntCal13 timescale via radionuclide wiggle matching. In
doing so, we show that the climate oscillations identified in Greenland and
Europe between 11 450 and 11 000 years BP were not synchronous but
terminated and began, respectively, with the onset of a grand solar minimum.
A similar spatial anomaly pattern is found in a number of modeling studies
on solar forcing of climate in the North Atlantic region. We further
postulate that freshwater delivery to the North Atlantic would have had the
potential to amplify solar forcing through a slowdown of the Atlantic
meridional overturning circulation (AMOC) reinforcing surface air
temperature anomalies in the region.
Type of Medium:
Online Resource
ISSN:
1814-9332
DOI:
10.5194/cp-16-1145-2020
DOI:
10.5194/cp-16-1145-2020-supplement
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2020
detail.hit.zdb_id:
2217985-9
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