Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP
In the area of Denmark Strait (~66° N), the two modes of the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) are expressed in changes of the northward flux of Atlantic water and the southward advection of polar water in the East Iceland current. Proxies from marine cores along an enviro...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:1d2b2b966c7b48ce801e286b965f39e0 2023-05-15T14:58:45+02:00 Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP J. T. Andrews A. E. Jennings 2014-02-01 https://doi.org/10.5194/cp-10-325-2014 http://www.clim-past.net/10/325/2014/cp-10-325-2014.pdf https://doaj.org/article/1d2b2b966c7b48ce801e286b965f39e0 en eng Copernicus Publications 1814-9324 1814-9332 doi:10.5194/cp-10-325-2014 http://www.clim-past.net/10/325/2014/cp-10-325-2014.pdf https://doaj.org/article/1d2b2b966c7b48ce801e286b965f39e0 undefined Climate of the Past, Vol 10, Iss 1, Pp 325-343 (2014) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.5194/cp-10-325-2014 2023-01-22T18:55:29Z In the area of Denmark Strait (~66° N), the two modes of the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) are expressed in changes of the northward flux of Atlantic water and the southward advection of polar water in the East Iceland current. Proxies from marine cores along an environmental gradient from extensive to little or no drift ice, capture low frequency variations over the last 2000 cal yr BP. Key proxies are the weight% of calcite, a measure of surface water stratification and nutrient supply, the weight% of quartz, a measure of drift ice transport, and grain size. Records from Nansen and Kangerlussuaq fjords show variable ice-rafted debris (IRD) records but have distinct mineralogy associated with differences in the fjord catchment bedrock. A comparison between cores on either side of the Denmark Strait (MD99-2322 and MD99-2269) show a remarkable millennial-scale similarity in the trends of the weight% of calcite with a trough reached during the Little Ice Age. However, the quartz records from these two sites are quite different. The calcite records from the Denmark Strait parallel the 2000 yr Arctic summer-temperature reconstructions; analysis of the detrended calcite and quartz data reveal significant multi-decadal–century periodicities superimposed on a major environmental shift occurring ca. 1450 AD. Article in Journal/Newspaper Arctic Denmark Strait Iceland Kangerlussuaq North Atlantic North Atlantic oscillation Unknown Arctic Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Climate of the Past 10 1 325 343 |
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geo envir J. T. Andrews A. E. Jennings Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
topic_facet |
geo envir |
description |
In the area of Denmark Strait (~66° N), the two modes of the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) are expressed in changes of the northward flux of Atlantic water and the southward advection of polar water in the East Iceland current. Proxies from marine cores along an environmental gradient from extensive to little or no drift ice, capture low frequency variations over the last 2000 cal yr BP. Key proxies are the weight% of calcite, a measure of surface water stratification and nutrient supply, the weight% of quartz, a measure of drift ice transport, and grain size. Records from Nansen and Kangerlussuaq fjords show variable ice-rafted debris (IRD) records but have distinct mineralogy associated with differences in the fjord catchment bedrock. A comparison between cores on either side of the Denmark Strait (MD99-2322 and MD99-2269) show a remarkable millennial-scale similarity in the trends of the weight% of calcite with a trough reached during the Little Ice Age. However, the quartz records from these two sites are quite different. The calcite records from the Denmark Strait parallel the 2000 yr Arctic summer-temperature reconstructions; analysis of the detrended calcite and quartz data reveal significant multi-decadal–century periodicities superimposed on a major environmental shift occurring ca. 1450 AD. |
format |
Article in Journal/Newspaper |
author |
J. T. Andrews A. E. Jennings |
author_facet |
J. T. Andrews A. E. Jennings |
author_sort |
J. T. Andrews |
title |
Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
title_short |
Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
title_full |
Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
title_fullStr |
Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
title_full_unstemmed |
Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP |
title_sort |
multidecadal to millennial marine climate oscillations across the denmark strait (~ 66° n) over the last 2000 cal yr bp |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-325-2014 http://www.clim-past.net/10/325/2014/cp-10-325-2014.pdf https://doaj.org/article/1d2b2b966c7b48ce801e286b965f39e0 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Kangerlussuaq |
geographic_facet |
Arctic Kangerlussuaq |
genre |
Arctic Denmark Strait Iceland Kangerlussuaq North Atlantic North Atlantic oscillation |
genre_facet |
Arctic Denmark Strait Iceland Kangerlussuaq North Atlantic North Atlantic oscillation |
op_source |
Climate of the Past, Vol 10, Iss 1, Pp 325-343 (2014) |
op_relation |
1814-9324 1814-9332 doi:10.5194/cp-10-325-2014 http://www.clim-past.net/10/325/2014/cp-10-325-2014.pdf https://doaj.org/article/1d2b2b966c7b48ce801e286b965f39e0 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-10-325-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
1 |
container_start_page |
325 |
op_container_end_page |
343 |
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1766330874316455936 |