A comparison between multi-proxy and historical data of drift-ice conditions on the East Greenland shelf ...

• Main Author: Andrews, John
• Format: Dataset
• Language: English
• Published: NSF Arctic Data Center 2015
• Subjects: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT; SHIP; oceans; Greenland; Denmark Strait; East Greenland; Ice Sheet; Sea ice
• Online Access: https://dx.doi.org/10.18739/a2wh2df5c; https://arcticdata.io/catalog/view/doi:10.18739/A2WH2DF5C

The reduction in sea ice along the SE Greenland coast during the last century has severely impacted ice-rafting to this area. In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 years, we conducted a multiproxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trough (~300 m water depth). The proxy-based data obtained have been compared with historical and instrumental data to gain a better understanding of the ice sheet-ocean interactions in the area. A robust chronology has been developed based on 210Pb and 137Cs measurements on core PO175GKC#9 (~66.2°N, 32°W) and expanded to the two adjacent cores based on correlations between calcite weight percent records. Our proxy records include sea-ice and phytoplankton biomarkers, and a variety of mineralogical determinations based on the <2 mm sediment fraction, including identification with quantitative x-ray diffraction, ice-rafted debris counts on the 63-150 µm sand ...