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Guo, Jingjing; Fuchs, Louise; Ziegler, Martin; Sun, Youbin; Peterse, Francien (2024): Branched glycerol dialkyl glycerol tetraethers (brGDGTs) from a loess-paleosol sequence (Yuanbao) located at the western edge of the Chinese Loess Plateau over the past 130,000 years [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971325

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Published: 2024-10-18 • DOI registered: 2024-11-16

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Abstract:
In this dataset, the loess proxies and branched glycerol dialkyl glycerol tetraethers (brGDGTs) from a loess-paleosol sequence (Yuanbao) located on the western edge of the Chinese Loess Plateau are included. In total, 872 loess and paleosol samples were investigated for loess proxies, and 580 samples were extracted for brGDGT records spanning the past 130,000 years. We reported 15 compounds of brGDGTs and three proxies based on the relative abundance of brGDGTs (i.e., methylation of 5-methyl brGDGTs, MBT'5Me; isomer ratio, IR; degree of cyclization, DC). The estimated temperature above freezing months based on MBT'5Me has also been reported using the Bayesian model.
Keyword(s):
brGDGTs; Chinese loess; East Asian monsoon; precipitation; Temperature
References:
Fuchs, Louise; Guo, Jingjing; Schefuß, Enno; Sun, Youbin; Guo, Fei; Ziegler, Martin; Peterse, Francien (2023): Isotopic and magnetic proxies are good indicators of millennial-scale variability of the East Asian monsoon. Communications Earth & Environment, 4(1), 425, https://doi.org/10.1038/s43247-023-01090-z
Funding:
Dutch Research Council (NWO), grant/award no. 192.074: Elucidating monsoon dynamics: deconvolving temperature and precipitation in East Asian climate reconstructions
National Natural Science Foundation of China (NSFC), grant/award no. 42230514
Coverage:
Latitude: 35.630000 * Longitude: 103.170000
Minimum DEPTH, sediment/rock: 0.700000000 m * Maximum DEPTH, sediment/rock: 39.303125000 m
Event(s):
YB19_Yuanbao_section * Latitude: 35.630000 * Longitude: 103.170000 * Elevation: 2180.0 m * Location: China * Comment: Yuanbao section in the western part of the Chinese Loess Plateau, collected in August 2019
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepth sedmGuo, JingjingGeocode
2Age, datedAge datedkaGuo, Jingjing
3Branched glycerol dialkyl glycerol tetraether, IIIa, fractional abundancebrGDGT IIIaGuo, Jingjing
4Branched glycerol dialkyl glycerol tetraether, IIIa', fractional abundancebrGDGT IIIa'Guo, Jingjing
5Branched glycerol dialkyl glycerol tetraether, IIIb, fractional abundancebrGDGT IIIbGuo, Jingjing
6Branched glycerol dialkyl glycerol tetraether, IIIb', fractional abundancebrGDGT IIIb'Guo, Jingjing
7Branched glycerol dialkyl glycerol tetraether, IIIc, fractional abundancebrGDGT IIIcGuo, Jingjing
8Branched glycerol dialkyl glycerol tetraether, IIIc', fractional abundancebrGDGT IIIc'Guo, Jingjing
9Branched glycerol dialkyl glycerol tetraether, IIa, fractional abundancebrGDGT IIaGuo, Jingjing
10Branched glycerol dialkyl glycerol tetraether, IIa', fractional abundancebrGDGT IIa'Guo, Jingjing
11Branched glycerol dialkyl glycerol tetraether, IIb, fractional abundancebrGDGT IIbGuo, Jingjing
12Branched glycerol dialkyl glycerol tetraether, IIb', fractional abundancebrGDGT IIb'Guo, Jingjing
13Branched glycerol dialkyl glycerol tetraether, IIc, fractional abundancebrGDGT IIcGuo, Jingjing
14Branched glycerol dialkyl glycerol tetraether, IIc', fractional abundancebrGDGT IIc'Guo, Jingjing
15Branched glycerol dialkyl glycerol tetraether, Ia, fractional abundancebrGDGT IaGuo, Jingjing
16Branched glycerol dialkyl glycerol tetraether, Ib, fractional abundancebrGDGT IbGuo, Jingjing
17Branched glycerol dialkyl glycerol tetraether, Ic, fractional abundancebrGDGT IcGuo, Jingjing
18Methylation index of 5-methyl branched glycerol dialkyl glycerol tetraetherMBT5MEGuo, Jingjing
19Isomer ratioIRGuo, Jingjing
20Degree of cyclisationDCGuo, Jingjing
21Temperature, airTTT°CGuo, JingjingBayMBT - Bayesian calibration for the branched GDGT MBT5Me proxy
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
11600 data points

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