Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Kristjánsdóttir, Greta B; Moros, Matthias; Andrews, John T; Jennings, Anne E (2015): Holocene Mg/Ca, alkenones, and light stable isotope measurements on the outer North Iceland shelf, sediment core MD99-2269 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.847657, Supplement to: Kristjánsdóttir, GB et al. (2016): Holocene Mg/Ca, alkenones, and light stable isotope measurements on the outer North Iceland shelf (MD99-2269): A comparison of proxy data. The Holocene, 27(1), 52-62, https://doi.org/10.1177/0959683616652703

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
We present new Holocene century to millennial-scale proxies for the well-dated piston core MD99-2269 from Húnaflóadjúp on the North Iceland Shelf. The core is located in 365 mwd and lies close to the fluctuating boundary between Atlantic and Arctic/Polar waters. The proxies are: alkenone-based SST°C, and Mg/Ca SST°C estimates and stable d13C and d18O values on planktonic and benthic foraminifera. The data were converted to 60 yr equi-spaced time-series. Significant trends in the data were extracted using Singular Spectrum Analysis and these accounted for between 50% and 70% of the variance. A comparison between these data with previously published climate proxies from MD99-2269 was carried out on a data set which consisted of 14-variable data set covering the interval 400-9200 cal yr BP at 100 yr time steps. This analysis indicated that the 1st two PC axes accounted for 57% of the variability with high loadings clustering primarily into "nutrient" and "temperature" proxies. Clustering on the 100 yr time-series indicated major changes in environment at ~6350 and ~3450 cal yr BP, which define early, mid- and late Holocene climatic intervals. We argue that a pervasive freshwater cap during the early Holocene resulted in warm SST°s, a stratified water column, and a depleted nutrient supply. The loss of the freshwater layer in the mid-Holocene resulted in high carbonate production, and the late Holocene/neoglacial interval was marked by significantly more variable sea surface conditions.
Coverage:
Latitude: 66.641333 * Longitude: -20.863167
Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00
Event(s):
MD99-2269 (79US/Fr) * Latitude: 66.641333 * Longitude: -20.863167 * Date/Time: 1999-08-01T00:00:00 * Elevation: -365.0 m * Recovery: 25.44 m * Location: N.Iceland shelf, Reykjafjardarall * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Kristjánsdóttir, GB; Moros, M; Andrews, JT et al. (2015): (Appendix II) Size fraction >125 µm in sediment core MD99-2269. https://doi.org/10.1594/PANGAEA.847656
  2. Kristjánsdóttir, GB; Moros, M; Andrews, JT et al. (2015): (Appendix I) Stable isotope measurements of benthic and planktonic foraminifera in sediment core MD99-2269. https://doi.org/10.1594/PANGAEA.847652
  3. Kristjánsdóttir, GB; Moros, M; Andrews, JT et al. (2015): (Appendix I) Isotope samples with warnings and/or remarks for benthic and planktonic foraminifera in sediment core MD99-2269. https://doi.org/10.1594/PANGAEA.847654
  4. Kristjánsdóttir, GB; Moros, M; Andrews, JT et al. (2015): (Appendix J) Mg/Ca analysis of samples from sediment core MD99-2269. https://doi.org/10.1594/PANGAEA.847650
  5. Kristjánsdóttir, GB; Moros, M; Andrews, JT et al. (2015): (Appendix II) Alkenones and SST reconstruction for sediment core MD99-2269. https://doi.org/10.1594/PANGAEA.847655