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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Arctic Data Center
2015
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dataone:urn:uuid:0931983d-fab4-454a-8a4b-1caa12677f98 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 ENVELOPE(-35.0,-15.0,70.0,66.0) 2015-10-14T10:04:02Z https://search.dataone.org/view/urn:uuid:0931983d-fab4-454a-8a4b-1caa12677f98 unknown Arctic Data Center EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP Dataset 2015 dataone:urn:node:ARCTIC 2024-06-03T18:07:37Z 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 Iceland Kangerlussuaq North Atlantic North Atlantic oscillation Arctic Data Center (via DataONE) Arctic Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-35.0,-15.0,70.0,66.0) |
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Open Polar |
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Arctic Data Center (via DataONE) |
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dataone:urn:node:ARCTIC |
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unknown |
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EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP |
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EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS SHIP 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 |
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://search.dataone.org/view/urn:uuid:0931983d-fab4-454a-8a4b-1caa12677f98 |
op_coverage |
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 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 |
_version_ |
1800868745990635520 |