FN Archimer Export Format PT J TI Multidecadal to millennial marine climate oscillations across the Denmark Strait (similar to 66 degrees N) over the last 2000 cal yr BP BT AF ANDREWS, J. T. JENNINGS, A. E. AS 1:1,2;2:1,2; FF 1:;2:; C1 Univ Colorado, INSTAAR, Boulder, CO 80309 USA. Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA. C2 UNIV COLORADO BOULDER, USA UNIV COLORADO BOULDER, USA IN DOAJ IF 3.382 TC 17 UR https://archimer.ifremer.fr/doc/00291/40233/38688.pdf LA English DT Article CR IMAGES V LEG 1-MD114 IMAGES V LEG 4-MD114 BO Marion Dufresne AB 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 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. PY 2014 PD FEB SO Climate Of The Past SN 1814-9324 PU Copernicus Gesellschaft Mbh VL 10 IS 1 UT 000333837600022 BP 325 EP 343 DI 10.5194/cp-10-325-2014 ID 40233 ER EF