Source-specific biomarkers as proxies for Arctic and Antarctic sea ice

ST Belt - Organic geochemistry, 2018 - Elsevier
Over the last decade or so, certain source-specific C 25 highly branched isoprenoid (HBI)
lipid biomarkers have emerged as useful proxies for Arctic and Antarctic sea ice. Thus, IP 25 …

Temporal and geographic extent of the late Holocene dry period in the central Great Basin, USA

S Mensing, W Wang, D Rhode, DJ Kennett… - Quaternary Science …, 2023 - Elsevier
We provide evidence from pollen and radiocarbon dating of wet meadow sediments for the
presence of multi-centennial drought, termed the Late Holocene Dry Period (LHDP), in the …

Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum

TJ Porter, SW Schoenemann, LJ Davies… - Nature …, 2019 - nature.com
Eastern Beringia is one of the few Western Arctic regions where full Holocene climate
reconstructions are possible. However, most full Holocene reconstructions in Eastern …

Enhanced Arctic sea ice melting controlled by larger heat discharge of mid-Holocene rivers

J Dong, X Shi, X Gong, AS Astakhov, L Hu… - Nature …, 2022 - nature.com
Arctic sea ice retreat is linked to extrapolar thermal energy import, while the potential impact
of pan-Arctic river heat discharge on sea-ice loss has been unresolved. We reconstructed …

Polar bear's range dynamics and survival in the Holocene

H Seppä, MS Seidenkrantz, B Caissie… - Quaternary Science …, 2023 - Elsevier
Polar bear (Ursus maritimus) is the apex predator of the Arctic, largely dependent on sea-
ice. The expected disappearance of the ice cover of the Arctic seas by the mid 21st century …

Pacific Decadal Oscillation-like variability at a millennial timescale during the Holocene

C Chen, W Zhao, X Zhang - Global and Planetary Change, 2021 - Elsevier
Sea surface temperatures (SSTs) in the North Pacific exert a great influence on global
climate and ecosystem changes. The Pacific Decadal Oscillation (PDO) is the leading mode …

Reconstructing ice conditions in the southern Chukchi Sea during the last millennium based on chemical composition of sediments and diatom assemblages

AS Astakhov, X Shi, AV Darin, IA Kalugin, L Hu, IB Tsoy… - Marine Geology, 2020 - Elsevier
Using transfer functions, this study reconstructed the ice-free period (IFP) that occurred 4.7
kya in the southern Chukchi Sea, based on the comparison between the observed data and …

The importance of mass accuracy in selected ion monitoring analysis of branched and isoprenoid tetraethers

N Davtian, E Bard, G Ménot, Y Fagault - Organic geochemistry, 2018 - Elsevier
Among the new proxies based on the distribution of glycerol dialkyl glycerol tetraethers
(GDGTs), the BIT index (Branched and Isoprenoid Tetraether index) is one of the most …

An assessment of biomarker-based multivariate classification methods versus the PIP25 index for paleo Arctic sea ice reconstruction

D Köseoğlu, ST Belt, K Husum, J Knies - Organic Geochemistry, 2018 - Elsevier
The development of various combinative methods for Arctic sea ice reconstruction using the
sympagic highly branched isoprenoid (HBI) IP 25 in conjunction with pelagic biomarkers has …

Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community

L Hu, Y Liu, X **ao, X Gong, J Zou, Y Bai… - Marine Geology, 2020 - Elsevier
In this study, organic geochemical analyses of two sediment cores (BL16 and LV63–23)
recovered from the western Bering Sea were carried out to examine the sea-ice variability …