Lagged atmospheric circulation response in the Black Sea region to Greenland Interstadial 10
Czymzik, Markus LU ; Nowaczyk, Norbert R. ; Dellwig, Olaf ; Wegwerth, Antje ; Muscheler, Raimund LU
; Christl, Marcus
and Arz, Helge W.
(2020)
In Proceedings of the National Academy of Sciences of the United States of America
117(46).
p.28649-28654
- Abstract
Northern Hemispheric high-latitude climate variations during the last glacial are expected to propagate globally in a complex way. Investigating the evolution of these variations requires a precise synchronization of the considered environmental archives. Aligning the globally common production rate variations of the cosmogenic radionuclide 10Be in different archives provides a tool for such synchronizations. Here, we present a 10Be record at <40-y resolution along with subdecadal proxy records from one Black Sea sediment core around Greenland Interstadial 10 (GI-10) ∼41 ka BP and the Laschamp geomagnetic excursion. We synchronized our 10Be record to that from Greenland ice cores based on its globally common production rate... (More)
Northern Hemispheric high-latitude climate variations during the last glacial are expected to propagate globally in a complex way. Investigating the evolution of these variations requires a precise synchronization of the considered environmental archives. Aligning the globally common production rate variations of the cosmogenic radionuclide 10Be in different archives provides a tool for such synchronizations. Here, we present a 10Be record at <40-y resolution along with subdecadal proxy records from one Black Sea sediment core around Greenland Interstadial 10 (GI-10) ∼41 ka BP and the Laschamp geomagnetic excursion. We synchronized our 10Be record to that from Greenland ice cores based on its globally common production rate variations. The synchronized environmental proxy records reveal a bipartite climate response in the Black Sea region at the onset of GI-10. First, in phase with Greenland warming, reduced sedimentary coastal ice rafted detritus contents indicate less severe winters. Second, and with a lag of 190 (± 44) y, an increase in the detrital K/Ti ratio and authigenic Ca precipitation point to enhanced regional precipitation and warmer lake surface temperatures. We explain the lagged climatic response by a shift in the dominant mode of atmospheric circulation, likely connected with a time-transgressive adjustment of the regional thermal ocean interior to interstadial conditions.
(Less)
- author
- Czymzik, Markus
LU
; Nowaczyk, Norbert R.
; Dellwig, Olaf
; Wegwerth, Antje
; Muscheler, Raimund
LU
; Christl, Marcus
and Arz, Helge W.
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- archive synchronization, Black Sea sediments, climate, cosmogenic radionuclides, phase relationship
- in
- Proceedings of the National Academy of Sciences of the United States of America
- volume
- 117
- issue
- 46
- pages
- 6 pages
- publisher
- National Academy of Sciences
- external identifiers
-
- pmid:33139546
- scopus:85096359623
- ISSN
- 1091-6490
- DOI
- 10.1073/pnas.2005520117
- language
- English
- LU publication?
- yes
- id
- fbbe6382-dc30-46ea-8ecd-9f1fcff2b6f9
- date added to LUP
- 2020-11-30 14:11:14
- date last changed
- 2024-06-13 02:10:50
@article{fbbe6382-dc30-46ea-8ecd-9f1fcff2b6f9,
abstract = {{<p>Northern Hemispheric high-latitude climate variations during the last glacial are expected to propagate globally in a complex way. Investigating the evolution of these variations requires a precise synchronization of the considered environmental archives. Aligning the globally common production rate variations of the cosmogenic radionuclide 10Be in different archives provides a tool for such synchronizations. Here, we present a 10Be record at <40-y resolution along with subdecadal proxy records from one Black Sea sediment core around Greenland Interstadial 10 (GI-10) ∼41 ka BP and the Laschamp geomagnetic excursion. We synchronized our 10Be record to that from Greenland ice cores based on its globally common production rate variations. The synchronized environmental proxy records reveal a bipartite climate response in the Black Sea region at the onset of GI-10. First, in phase with Greenland warming, reduced sedimentary coastal ice rafted detritus contents indicate less severe winters. Second, and with a lag of 190 (± 44) y, an increase in the detrital K/Ti ratio and authigenic Ca precipitation point to enhanced regional precipitation and warmer lake surface temperatures. We explain the lagged climatic response by a shift in the dominant mode of atmospheric circulation, likely connected with a time-transgressive adjustment of the regional thermal ocean interior to interstadial conditions.</p>}},
author = {{Czymzik, Markus and Nowaczyk, Norbert R. and Dellwig, Olaf and Wegwerth, Antje and Muscheler, Raimund and Christl, Marcus and Arz, Helge W.}},
issn = {{1091-6490}},
keywords = {{archive synchronization; Black Sea sediments; climate; cosmogenic radionuclides; phase relationship}},
language = {{eng}},
number = {{46}},
pages = {{28649--28654}},
publisher = {{National Academy of Sciences}},
series = {{Proceedings of the National Academy of Sciences of the United States of America}},
title = {{Lagged atmospheric circulation response in the Black Sea region to Greenland Interstadial 10}},
url = {{http://dx.doi.org/10.1073/pnas.2005520117}},
doi = {{10.1073/pnas.2005520117}},
volume = {{117}},
year = {{2020}},
}