Influence of Seasonal Temperature Variation and pH Disparity on bGDGTs Thermometers in Soils 季节温度变化及土壤pH差异对土壤bGDGTs温度指标的影响

Zheng，Fengfeng1; Chen，Yufei1; Wang，Yongli2; Hong，Yiguo3; Liu，Weiguo4; Zhang，Chuanlun5,6

2018-09-01

10.3799/dqkx.2018.950

地球科学   影响因子和分区

1000-2383

To better understand the seasonal variation of bGDGTs in soils, we collected samples time-serially from several Chinese alkaline soils over 1 year. On the seasonal scale, the composition of bGDGTs is the result of a long-time adaption to temperature variation rather than a short-time adjustment. bGDGTs-derived temperatures in soils from cold and high altitude of Tibet Plateau are likely to reflect the temperature of spring/summer transition period. However, in other sites, the distribution and proxies of bGDGTs don't show significant seasonal variation or bias. Furthermore, soil pH appears to be the main reason for discrepancy in slopes of different calibrations, whichcan result in distinct calibration formulas in soils. Combing with thepreviously published datasets, our results demonstrate that the responses of MBT index to temperature are different in alkaline and acidic soils. Here, we propose an MBT-MAAT calibration in neutral to alkaline soils: MAAT = 20.78 × MBT + 5.92 (R = 0.88, p< 0.001) (5°C~25°C). This calibration partially amends the impactofsoil pH on MBT-MAAT relationship, which provides more accurate calibrations for paleotemperature reconstruction in specific regions of China.

bGDGTs Environmental geology MAAT MBT/CBT Seasonal variation Soil pH

EI

中文

通讯

China University of Geosciences

20193307311713

Calibration ; Environmental geology ; Soils ; Temperature distribution

Geology:481.1 ; Soils and Soil Mechanics:483.1 ; Thermodynamics:641.1 ; Chemistry, General:801.1

2-s2.0-85070514103

Scopus

1.State Key Laboratory of Marine Geology, Tongji University, ,Shanghai,200092,China
2.Institute of Geology and Geophysics, Chinese Academy of Sciences, ,Beijing,100029,China
3.School of Environmental Science and Engineer, Guangzhou University, ,Guangzhou,510006,China
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, ,Xi'an,710075,China
5.Department of Ocean Science and Engineering, Southern University of Science and Technology, ,Shenzhen,518055,China
6.Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, ,Qingdao,266061,China

Zheng，Fengfeng,Chen，Yufei,Wang，Yongli,等. Influence of Seasonal Temperature Variation and pH Disparity on bGDGTs Thermometers in Soils 季节温度变化及土壤pH差异对土壤bGDGTs温度指标的影响[J]. 地球科学,2018,43:71-83.

Zheng，Fengfeng,Chen，Yufei,Wang，Yongli,Hong，Yiguo,Liu，Weiguo,&Zhang，Chuanlun.(2018).Influence of Seasonal Temperature Variation and pH Disparity on bGDGTs Thermometers in Soils 季节温度变化及土壤pH差异对土壤bGDGTs温度指标的影响.地球科学,43,71-83.

Zheng，Fengfeng,et al."Influence of Seasonal Temperature Variation and pH Disparity on bGDGTs Thermometers in Soils 季节温度变化及土壤pH差异对土壤bGDGTs温度指标的影响".地球科学 43(2018):71-83.