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Causes and timing of the 8200 yr BP event inferred from the comparison of the GRIP Be-10 and the tree ring Delta C-14 record

Muscheler, Raimund LU ; Beer, J and Vonmoos, M (2004) In Quaternary Science Reviews 23(20-22). p.2101-2111
Abstract
We analyse the 8200 yr BP cold event by comparing the high-resolution Be-10 record from the GRIP ice core from Central Greenland with the well-known tree ring Delta(14)C record. By transferring the absolute dated tree ring chronology to the ice core time scale, we show that the coldest phase in the GRIP record occurred around 8150 yr BP. Furthermore, this method allows us to disentangle production and climate effects on Be-10 and C-14 with important implications for the reconstruction of past solar activity, and changes in the carbon cycle and Be-10 transport. We show that, in principle, it is possible to infer changes in ocean circulation by comparing Be-10 and C-14 records. However, the duration of the 8200 yr BP event is too short to... (More)
We analyse the 8200 yr BP cold event by comparing the high-resolution Be-10 record from the GRIP ice core from Central Greenland with the well-known tree ring Delta(14)C record. By transferring the absolute dated tree ring chronology to the ice core time scale, we show that the coldest phase in the GRIP record occurred around 8150 yr BP. Furthermore, this method allows us to disentangle production and climate effects on Be-10 and C-14 with important implications for the reconstruction of past solar activity, and changes in the carbon cycle and Be-10 transport. We show that, in principle, it is possible to infer changes in ocean circulation by comparing Be-10 and C-14 records. However, the duration of the 8200 yr BP event is too short to assign unambiguously a significant change in atmospheric C-14 concentration to changes in the global ocean circulation. Based on the comparison of Be-10 with climate records, one could argue that the 8200 yr BP cold event is triggered by a change towards lower solar activity. However, this link is questioned by the fact that around this period there are other similar and even stronger changes in solar activity that have no apparent connection to climate changes. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Quaternary Science Reviews
volume
23
issue
20-22
pages
2101 - 2111
publisher
Elsevier
external identifiers
  • wos:000224648200005
  • scopus:4944258445
ISSN
0277-3791
DOI
10.1016/j.quascirev.2004.08.007
language
English
LU publication?
yes
id
b4a56a07-1eb3-4322-9aab-0aa565b120d0 (old id 262655)
date added to LUP
2007-10-28 16:05:26
date last changed
2017-10-01 03:49:23
@article{b4a56a07-1eb3-4322-9aab-0aa565b120d0,
  abstract     = {We analyse the 8200 yr BP cold event by comparing the high-resolution Be-10 record from the GRIP ice core from Central Greenland with the well-known tree ring Delta(14)C record. By transferring the absolute dated tree ring chronology to the ice core time scale, we show that the coldest phase in the GRIP record occurred around 8150 yr BP. Furthermore, this method allows us to disentangle production and climate effects on Be-10 and C-14 with important implications for the reconstruction of past solar activity, and changes in the carbon cycle and Be-10 transport. We show that, in principle, it is possible to infer changes in ocean circulation by comparing Be-10 and C-14 records. However, the duration of the 8200 yr BP event is too short to assign unambiguously a significant change in atmospheric C-14 concentration to changes in the global ocean circulation. Based on the comparison of Be-10 with climate records, one could argue that the 8200 yr BP cold event is triggered by a change towards lower solar activity. However, this link is questioned by the fact that around this period there are other similar and even stronger changes in solar activity that have no apparent connection to climate changes. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Muscheler, Raimund and Beer, J and Vonmoos, M},
  issn         = {0277-3791},
  language     = {eng},
  number       = {20-22},
  pages        = {2101--2111},
  publisher    = {Elsevier},
  series       = {Quaternary Science Reviews},
  title        = {Causes and timing of the 8200 yr BP event inferred from the comparison of the GRIP Be-10 and the tree ring Delta C-14 record},
  url          = {http://dx.doi.org/10.1016/j.quascirev.2004.08.007},
  volume       = {23},
  year         = {2004},
}