| | Datum: | 12.05.05 | | Titel: | MORE DOUBTS ABOUT THE 8,200 BP ABRUPT CLIMATE EVENT | | Link: | | | Details1: | MORE DOUBTS ABOUT THE 8,200 BP ABRUPT CLIMATE EVENT
Rohling, Eelco J., and Heiko Pälike, 2005. Centennial-scale climate cooling
with a sudden cold event around 8,200 years ago. Nature Vol. 434, No 7036,
pp. 975-979, April 21, 2005
Abstract
The extent of climate variability during the current interglacial period,
the Holocene, is still debated. Temperature records derived from central
Greenland ice cores show one significant temperature anomaly between 8,200
and 8,100 years ago, which is often attributed to a meltwater outflow into
the North Atlantic Ocean and a slowdown of North Atlantic Deep Water
formation-this anomaly provides an opportunity to study such processes with
relevance to present-day freshening of the North Atlantic. Anomalies in
climate proxy records from locations around the globe are often correlated
with this sharp event in Greenland. But the anomalies in many of these
records span 400 to 600 years, start from about 8,600 years ago and form
part of a repeating pattern within the Holocene. More sudden climate changes
around 8,200 years ago appear superimposed on this longer-term cooling. The
compounded nature of the signals implies that far-field climate anomalies
around 8,200 years ago cannot be used in a straightforward manner to assess
the impact of a slowdown of North Atlantic Deep Water formation, and the
geographical extent of the rapid cooling event 8,200 years ago remains to be
determined.
... | | Datei1: | | | Details2: | | | Datei2: | | | Details3: | | | Datei3: | | | Details4: | | | Datei4: | | | Details5: | | | Datei5: | | | Details6: | |
|
|
