Discrepancies in lacustrine bacterial lipid temperature reconstructions explained by microbial ecology DOI Creative Commons
Jie Liang, Manuel Chevalier, Keshao Liu

et al.

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Dec. 5, 2024

Abstract Bacterial lipid branched glycerol dialkyl tetraethers (brGDGTs) are a valuable tool for reconstructing past temperatures. However, gap remains regarding the influence of bacterial communities on brGDGT profiles. Here, we identified two distinct patterns brGDGTs from surface sediments 38 Tibetan Plateau lakes using an unsupervised clustering technique. Further investigation revealed that salinity and pH significantly change community composition, affecting profiles causing brGDGT-based temperatures to be overestimated by up 2.7 ± 0.7 °C in haloalkaline environments. We subsequently used trained model examine assemblages global lacustrine dataset, confirming applicability our approach. finally applied approach Holocene records Plateau, showing shifts clusters amplified temperature variations over timescales. Our findings demonstrate microbial ecology can robustly diagnose constrain site-specific discrepancies reconstruction.

Language: Английский

Archaeal Hydroxylated Isoprenoid GDGTs in Asian Lake Sediments: A New Tool for Terrestrial Paleotemperature Reconstructions DOI Creative Commons
Jie Wu, Huan Yang, Caiming Shen

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(6)

Published: March 18, 2024

Abstract Hydroxylated isoprenoid GDGTs (OH‐GDGTs) have emerged as a novel tool for reconstructing sea surface temperatures. However, when using marine OH‐GDGT calibration in lacustrine settings, it leads to significant overestimation of temperatures, emphasizing the necessity thorough examination OH‐GDGTs lakes. Here, we investigated distributions sediments from 65 lakes West China and compiled published Asian lake global data sets. Among all GDGT‐based indices, RI‐OH showed strongest correlation with temperature across The value was higher than sediments, likely due differences composition Group 1.1a thaumarchaeotal species between two settings. first developed addressed issue applied both water column sediment core, highlighting potential new terrestrial paleothermometer.

Language: Английский

Citations

4
New global lacustrine brGDGTs temperature calibrations based on machine learning DOI Creative Commons
Zeyang Zhu, Jing Wu, Guoqiang Chu

et al.

Quaternary Science Reviews, Journal Year: 2025, Volume and Issue: 357, P. 109319 - 109319

Published: March 26, 2025

Language: Английский

Citations

0
The seasonal temperature conundrum for the Holocene DOI Creative Commons
Zhengyu Liu, Jun Cheng, Yukun Zheng

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(17)

Published: April 25, 2025

Temperature is the key variable in study of climate changes past and future. Most previous studies on temperature reconstructions, however, have focused mean annual (MAT). Here, focusing seasonal reconstructions Northern Hemisphere extratropics during Holocene period, we show that change cycle severely underestimated comparison with expectation from present observations. Our highlights current uncertainty Holocene, an implication MAT simulation models may not be much biased.

Language: Английский

Citations

0
A novel method to advance the brGDGTs-based paleoclimate reconstruction applicable to different terrestrial environments DOI

Liping Tian,

Mengyuan Wang, Cong Chen

et al.

Quaternary Science Reviews, Journal Year: 2024, Volume and Issue: 328, P. 108540 - 108540

Published: Feb. 14, 2024

Language: Английский

Citations

3
Millennial changes and cooling trends in land surface warm-season temperatures during the Holocene DOI
Yukun Zheng, Hongyan Liu, Hongya Wang

et al.

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(18), P. 2930 - 2937

Published: May 18, 2024

Language: Английский

Citations

3
Discrepancies in lacustrine bacterial lipid temperature reconstructions explained by microbial ecology DOI Creative Commons
Jie Liang, Manuel Chevalier, Keshao Liu

et al.

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Dec. 5, 2024

Abstract Bacterial lipid branched glycerol dialkyl tetraethers (brGDGTs) are a valuable tool for reconstructing past temperatures. However, gap remains regarding the influence of bacterial communities on brGDGT profiles. Here, we identified two distinct patterns brGDGTs from surface sediments 38 Tibetan Plateau lakes using an unsupervised clustering technique. Further investigation revealed that salinity and pH significantly change community composition, affecting profiles causing brGDGT-based temperatures to be overestimated by up 2.7 ± 0.7 °C in haloalkaline environments. We subsequently used trained model examine assemblages global lacustrine dataset, confirming applicability our approach. finally applied approach Holocene records Plateau, showing shifts clusters amplified temperature variations over timescales. Our findings demonstrate microbial ecology can robustly diagnose constrain site-specific discrepancies reconstruction.

Language: Английский

Citations

1