Evaluating isoprenoidal hydroxylated GDGT-based temperature proxies in surface sediments from the global ocean

Archaeal Hydroxylated Isoprenoid GDGTs in Asian Lake Sediments: A New Tool for Terrestrial Paleotemperature Reconstructions

“…Yujiasan and Erxianyuan peatland were 16.7 ± 3.6°C and 12.3 ± 1.8°C, respectively, consistent with actual MAAT (17°C and 14°C, respectively; Man et al, 2023). This indicates the similar temperature adaptation Kou et al, 2022;Sinninghe Damsté, Weber, et al, 2022;Li et al, 2023;Zheng et al, 2023), against sea surface temperatures (SST) in marine surface sediments (Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), and against MAAT in peat and soils (Man et al, 2023;.…”

“…The lake surface sediments in this study exhibit a higher fractional abundance of GDGT-0 and a higher value of Cren/Cren′ compared to the corresponding regional soils (Figure 2a; 0.63 ± 0.22 vs. 0.37 ± 0.20 and 49 ± 39 vs. 7 ± 14, respectively). (Kou et al, 2022;Li et al, 2023;Sinninghe Damsté, Weber, et al, 2022;Zheng et al, 2023), marine surface sediments (Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), soils and peat sediments (Man et al, 2023;.…”

“…Sinninghe Damsté, Warden, et al (2022) also noted higher RI-OH values in lake sediments than marine sediments in several Baltic Sea sediment cores and attributed them to the effect of salinity. Recently, Xiao et al (2023) and Varma et al (2024) both found an unusually large range of RI-OH values in tropical oceans and attributed it to the effect of water depth. However, salinity and water depth show no influence on the RI-OH value in the Asian lake data set .…”

“…Figure1. World map showing the locations of samples used in this study, including lake surface sediments from this study and other previous studies(Kou et al, 2022;Li et al, 2023;Sinninghe Damsté, Weber, et al, 2022;Zheng et al, 2023), marine surface sediments(Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), soils and peat sediments(Man et al, 2023;.…”

“…(a) Comparison of RI-OH and RI-OH′ against MLWT in lake surface sediments (this study; H Wang et al, 2019;Kou et al, 2022;Sinninghe Damsté, Weber, et al, 2022;Li et al, 2023;Zheng et al, 2023),. against sea surface temperatures (SST) in marine surface sediments(Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), and against MAAT in peat and soils(Man et al, 2023;.…”