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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2015
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dataone:doi:10.18739/A21S8F 2024-06-03T18:46:37+00:00 Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP. John T Andrews NORTH AMERICA > GREENLAND ENVELOPE(-35.0,-15.0,70.0,66.0) 2015-10-14T00:00:00Z https://doi.org/10.18739/A21S8F unknown Arctic Data Center EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP oceans Dataset 2015 dataone:urn:node:ARCTIC https://doi.org/10.18739/A21S8F 2024-06-03T18:08:13Z 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. Dataset Arctic Denmark Strait Greenland Iceland Kangerlussuaq North Atlantic North Atlantic oscillation Arctic Data Center (via DataONE) Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-35.0,-15.0,70.0,66.0) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP oceans |
spellingShingle |
EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP oceans John T Andrews Multidecadal to millennial marine climate oscillations across the Denmark Strait (~ 66° N) over the last 2000 cal yr BP. |
topic_facet |
EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP oceans |
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 |
Dataset |
author |
John T Andrews |
author_facet |
John T Andrews |
author_sort |
John 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 |
Arctic Data Center |
publishDate |
2015 |
url |
https://doi.org/10.18739/A21S8F |
op_coverage |
NORTH AMERICA > GREENLAND ENVELOPE(-35.0,-15.0,70.0,66.0) |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-35.0,-15.0,70.0,66.0) |
geographic |
Arctic Greenland Kangerlussuaq |
geographic_facet |
Arctic Greenland Kangerlussuaq |
genre |
Arctic Denmark Strait Greenland Iceland Kangerlussuaq North Atlantic North Atlantic oscillation |
genre_facet |
Arctic Denmark Strait Greenland Iceland Kangerlussuaq North Atlantic North Atlantic oscillation |
op_doi |
https://doi.org/10.18739/A21S8F |
_version_ |
1800868748947619840 |