Dust concentration in the NGRIP ice core

Corresponding millennial-scale climate changes have been reported from the North Atlantic region and from east Asia for the last glacial period on independent timescales only. To assess their degree of synchrony we suggest interpreting Greenland ice core dust parameters as proxies for the east Asian...

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Bibliographic Details
Main Author: Ruth, Urs
Format: Dataset
Language:English
Published: PANGAEA 2007
Subjects:
Age model
GICC05
optional
SS09sea
Calcium
relative
Calculated
Depth
bottom/max
ice/snow
top/min
Dust concentration
Greenland
ICEDRILL
Ice drill
Laser particle counter
KLOTZ
NGRIP
North Greenland Ice Core Project
NorthGRIP
Sampling/drilling ice
Dansgaard-Oeschger events
Greenland ice core
Greenland Ice core Project
ice core
North Atlantic
North Greenland
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.587836
https://doi.org/10.1594/PANGAEA.587836
Description
Summary:Corresponding millennial-scale climate changes have been reported from the North Atlantic region and from east Asia for the last glacial period on independent timescales only. To assess their degree of synchrony we suggest interpreting Greenland ice core dust parameters as proxies for the east Asian monsoon systems. This allows comparing North Atlantic and east Asian climate on the same timescale in high resolution ice core data without relative dating uncertainties. We find that during Dansgaard-Oeschger events North Atlantic region temperature and east Asian storminess were tightly coupled and changed synchronously within 5-10 years with no systematic lead or lag, thus providing instantaneous climatic feedback. The tight link between North Atlantic and east Asian glacial climate could have amplified changes in the northern polar cell to larger scales. We further find evidence for an early onset of a Younger Dryas-like event in continental Asia, which gives evidence for heterogeneous climate change within east Asia during the last deglaciation.

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