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Rodrigo-Gámiz, Marta; Rampen, Sebastiaan W; de Haas, Henk; Baas, Marianne; Schouten, Stefan; Sinninghe Damsté, Jaap S (2015): Organic temperature proxies in the subpolat region around Iceland [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.855761, Supplement to: Rodrigo-Gámiz, M et al. (2015): Constraints on the applicability of the organic temperature proxies UK'37, TEX86 and LDI in the subpolar region around Iceland. Biogeosciences, 12(22), 6573-6590, https://doi.org/10.5194/bg-12-6573-2015

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Published: 2015-12-11 • DOI registered: 2016-01-08

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Abstract:
Subpolar regions are key areas to study natural climate variability, due to their high sensitivity to rapid environmental changes, particularly through sea surface temperature (SST) variations. Here, we have tested three independent organic temperature proxies (UK'37, TEX86 and LDI) on their potential applicability for SST reconstruction in the subpolar region around Iceland. UK'37, TEX86 and TEXL86 temperature estimates from suspended particulate matter showed a substantial discrepancy with instrumental data, while long chain alkyl diols were below detection limit in most of the stations. In the northern Iceland Basin, sedimenting particles revealed a seasonality in lipid fluxes i.e. high fluxes of alkenones and GDGTs were measured during late spring-summer, and high fluxes of long chain alkyl diols during late summer. The flux-weighted average temperature estimates had a significant negative (ca. 2.3°C for UK'37) and positive (up to 5°C for TEX86) offset with satellite-derived SSTs and temperature estimates derived from the underlying surface sediment. UK'37 temperature estimates from surface sediments around Iceland correlate well with summer mean sea surface temperatures, while TEX86 derived temperatures correspond with both annual and winter mean 0-200 m temperatures, suggesting a subsurface temperature signal. Anomalous LDI-SST values in surface sediments, and low mass flux of 1,13- and 1,15-diols compared to 1,14-diols, suggest that Proboscia diatoms are the major sources of long chain alkyl diols in this area rather than eustigmatophyte algae, and therefore the LDI cannot be applied in this region.
Coverage:
Median Latitude: 63.479066 * Median Longitude: -17.603462 * South-bound Latitude: 61.498550 * West-bound Longitude: -24.179900 * North-bound Latitude: 67.501630 * East-bound Longitude: -12.207870
Date/Time Start: 2011-07-11T11:04:04 * Date/Time End: 2012-07-26T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Rodrigo-Gámiz, M; Rampen, SW; de Haas, H et al. (2015): (Table 2) Lipid fluxes derived from sediment trap samples. https://doi.org/10.1594/PANGAEA.855760
  2. Rodrigo-Gámiz, M; Rampen, SW; de Haas, H et al. (2015): (Table S3) Sea surface temperature reconstruction from surface sediments. https://doi.org/10.1594/PANGAEA.855753
  3. Rodrigo-Gámiz, M; Rampen, SW; de Haas, H et al. (2015): (Table S1) Sea surface temperature reconstruction from SPM samples. https://doi.org/10.1594/PANGAEA.855755
  4. Rodrigo-Gámiz, M; Rampen, SW; de Haas, H et al. (2015): (Table S2) Sea surface temperature reconstruction from sediment trap samples. https://doi.org/10.1594/PANGAEA.855757