In recent years, branched chain glycerol dialkyl glycerol tetraethers (brGDGTs) derived from microbial cell membrane lipids are sensitive to environmental parameters (temperature and pH, etc.) and are widely used in the quantitative reconstruction of paleoenvironment. Based on the surface sediments of lakes in the Qinghai Tibet Plateau and brGDGTs in the surface sediments of other lakes published in China, we developed a new brGDGT-air temperature calibration. By collecting the annual suspended particulate matter of Dagze Co and analyzing brGDGTs, the distribution of brGDGTs in different water column layers were reconstructed. Combined with the modern observation results and the new calibration, using the results of brGDGT in the sediments of Xiada Co, the atmospheric temperature changes in the western Qinghai Tibet Plateau in the past 2000 years are reconstructed. This result provides an important theoretical reference for the reconstruction of temperature by brGDGTs in the future.

File naming and required software

The data is stored in table XLS format and named "brgdgts of surface segment at Tibetan lakes, Dagze Co Lake trap, and Xiada co fossil. Xlsx", which contains three sheets, namely Chinese surface segments, Lake trap and Xiada co fossil. Chinese surface segments contains 23 fields, namely No., location, longitude (°), latitude (°), Ia, Ib, Ic, IIa, IIa', IIb, IIb', IIc, IIc', IIIa, IIIa', IIIb, IIIb', IIIc, IIIc', MBT'6me, MAT6me(reconstructed temperature), MAT (° C) (mean annual temperature), Summer (°C) (summer temperature)，MAF (°C) (mean temperature of months above freezing), ref data (references); The lake trap contains 24 fields, which are No. (serial number), location, sample types, longitude (°), latitude (°), Ia, Ib, Ic, IIa, IIa', IIb, IIb', IIc, IIc', IIIa, IIIa', IIIb, IIIb', IIIc, IIIc', MBT'6me, MAT6me(reconstructed temperature), MAT (° C) (observed temperature), ref data (references); Xiada co fossil contains 20 fields, namely sample name, age (CE), Ia, Ib, Ic, IIa, IIa', IIb, IIb', IIc, IIc', IIIa, IIIa', IIIb, IIIb', IIIc, IIIc', MBT'6me, and MAT6me (reconstructed temperature).

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Cite as:

Liang, J. (2021). BrGDGT data sets of lake surface sediments and settling particles from Dagze Co in Qinghai Tibet Plateau. A Big Earth Data Platform for Three Poles, DOI: 10.11888/Paleoenv.tpdc.271728. CSTR: 18406.11.Paleoenv.tpdc.271728. (Download the reference： RIS | Bibtex )

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Support Program

The impact of human activities on the aquatic community structure of lakes in the central Qinghai-Tibet Plateau during the past two hundred years (No:42007409)

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