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| Andrews, J. T.; Jennings, A. E.. |
| In the area of Denmark Strait (similar to 66 degrees 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... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00291/40233/38688.pdf |
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| Sundqvist, H. S.; Kaufman, D. S.; Mckay, N. P.; Balascio, N. L.; Briner, J. P.; Cwynar, L. C.; Sejrup, H. P.; Seppa, H.; Subetto, D. A.; Andrews, J. T.; Axford, Y.; Bakke, J.; Birks, H. J. B.; Brooks, S. J.; De Vernal, A.; Jennings, A. E.; Ljungqvist, F. C.; Ruehland, K. M.; Saenger, C.; Smol, J. P.; Viau, A. E.. |
| We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58 degrees N latitude where proxy time series extend back at least to 6 cal ka (all ages in this article are in calendar years before present - BP), are resolved at submillennial scale (at least one value every 400 +/- 200 years) and have age models constrained by at least one age every 3000 years. In addition to conventional meta-data for each proxy record (location, proxy type, reference), we include two novel parameters that add functionality to the database. First, "climate interpretation" is a series of fields that logically describe the specific climate variable(s) represented by the proxy record. It... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00291/40216/38682.pdf |
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| Andrews, J. T.; Barber, D. C.; Jennings, A. E.; Eberl, D. D.; Maclean, B.; Kirby, M. E.; Stoner, J. S.. |
| Core HU97048-007PC was recovered from the continental Labrador Sea slope at a water depth of 945?m, 250?km seaward from the mouth of Cumberland Sound, and 400?km north of Hudson Strait. Cumberland Sound is a structural trough partly floored by Cretaceous mudstones and Paleozoic carbonates. The record extends from similar to 10 to 58?ka. On-board logging revealed a complex series of lithofacies, including buff-colored detrital carbonate-rich sediments [Heinrich (H)-events] frequently bracketed by black facies. We investigate the provenance of these facies using quantitative X-ray diffraction on drill-core samples from Paleozoic and Cretaceous bedrock from the SE Baffin Island Shelf, and on the?<?2-mm sediment fraction in a transect of five cores from... |
| Tipo: Text |
Palavras-chave: Baffin Bay; Detrital carbonate (DC-) events; Heinrich events; Labrador Sea; Laurentide Ice Sheet. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37644/35823.pdf |
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| Sundqvist, H. S.; Kaufman, D. S.; Mckay, N. P.; Balascio, N. L.; Briner, J. P.; Cwynar, L. C.; Sejrup, H. P.; Seppä, H.; Subetto, D. A.; Andrews, J. T.; Axford, Y.; Bakke, J.; Birks, H. J. B.; Brooks, S. J.; De Vernal, A.; Jennings, A. E.; Ljungqvist, F. C.; Rühland, K. M.; Saenger, C.; Smol, J. P.; Viau, A. E.. |
| We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 167 sites from north of 58° N latitude where proxy time-series extend back at least to 6 cal ka, are resolved at sub-millennial scale (at least one value every 400 ± 200 yr) and have age models constrained by at least one age every 3000 yr. In addition to conventional metadata for each proxy record (location, proxy type, reference), we include two novel parameters that add functionality to the database. First, "climate interpretation" is a series of fields that logically describe the specific climate variable(s) represented by the proxy record. It encodes the proxy-climate relation reported by authors of the original studies into a... |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00292/40282/38689.pdf |
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