Biomarker and temperature and sea ice proxy data for TEX86 calibration in sediment core B997-316 ...

• Main Authors: Harning, David J, Andrews, John T, Belt, Simon T, Cabedo-Sanz, Patricia, Geirsdóttir, Áslaug, Dildar, Nadia, Miller, Gifford H, Sepúlveda, Julio
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Sample ID; DEPTH, sediment/rock; AGE; Age; 2,6,10,14-Tetramethyl-7-3-methylpent-4-enylpentadecane per unit sediment mass; Diene II per unit sediment mass; 9Z-2,6,10,14-Tetramethyl-7-3-methylpent-4-enylidenpentadeca-9-ene per unit sediment mass; Tetraether index of 86 carbon atoms, low-temperature region; Temperature, water, winter; Glycerol dialkyl glycerol tetraethers; Acyclic glycerol dialkyl glycerol tetraether; Monocyclic glycerol dialkyl glycerol tetraether; Dicyclic glycerol dialkyl glycerol tetraether; Tricyclic glycerol dialkyl glycerol tetraether; Crenarchaeol; Crenarchaeol regio-isomer; Giant gravity corer; Iceland; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.906098; https://doi.pangaea.de/10.1594/PANGAEA.906098

Holocene paleoceanographic reconstructions along the North Iceland Shelf have employed a variety of sea surface temperature and sea ice proxies. However, these surface proxies tend to have a seasonal bias toward spring/summer and thus only provide a discrete snapshot of surface conditions during one season. Furthermore, sea surface temperature proxies can be influenced by additional confounding variables resulting in markedly different Holocene temperature reconstructions. Here, we expand Iceland's marine paleoclimate toolkit with TEX86 L: a temperature proxy based on the distribution of archaeal glycerol dibiphytanyl glycerol tetraether (GDGT) lipids. We develop a local Icelandic calibration from 21 surface sediment samples covering a wide environmental gradient across Iceland's insular shelves. Locally calibrated GDGT results demonstrate that (1) TEX86 L reflects winter subsurface (0-200 m) temperatures on the North Iceland Shelf and (2) our calibration produces more realistic temperature estimates with ... : Supplement to: Harning, David J; Andrews, John T; Belt, Simon T; Cabedo-Sanz, Patricia; Geirsdóttir, Áslaug; Dildar, Nadia; Miller, Gifford H; Sepúlveda, Julio (2019): Sea Ice Control on Winter Subsurface Temperatures of the North Iceland Shelf During the Little Ice Age: A TEX86 Calibration Case Study. Paleoceanography and Paleoclimatology, 34(6), 1006-1021 ...