Dust concentration in the NGRIP ice core, supplement to: Ruth, Urs; Bigler, Matthias; Röthlisberger, Regine; Siggaard-Andersen, Marie-Louise; Kipfstuhl, Sepp; Goto-Azuma, Kumiko; Hansson, Margareta E; Johnsen, Sigfús Jóhann; Lu, Huayu; Steffensen, Jørgen Peder (2007): Ice core evidence for a very tight link between North Atlantic and east Asian glacial climate. Geophysical Research Letters, 34, L03706

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 - Data Publisher for Earth & Environmental Science 2007
Subjects:
DEPTH, ice/snow
Depth, top/min
Depth, bottom/max
Age model
Age model, optional
Dust concentration
Calcium, relative
Ice drill
Age model, SS09sea
Age model, GICC05
Laser particle counter, KLOTZ
Calculated
NGRIP
Sampling/drilling ice
North Greenland Ice Core Project NGRIP
Greenland
Dansgaard-Oeschger events
Greenland ice core
Greenland Ice core Project
ice core
North Atlantic
North Greenland
North Greenland Ice Core Project
Online Access:https://dx.doi.org/10.1594/pangaea.587836
https://doi.pangaea.de/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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