Vegetation effects on temperature calibrations of branched glycerol dialkyl glycerol tetraether (brGDGTs) in soils
文献类型：期刊论文
| 作者 | Liang, Jie1,2,3; Russell, James M.3; Xie, Haichao3,4; Lupien, Rachel L.3; Si, Guicai1,5; Wang, Jian1,6; Hou, Juzhi1; Zhang, Gengxin1 |
| 刊名 | ORGANIC GEOCHEMISTRY
 |
| 出版日期 | 2019 |
| 卷号 | 127页码:1-11 |
| ISSN号 | 0146-6380 |
| 关键词 | Vegetation cover Vegetation type MBT ' CBT MBT '(5Me ) CBT5Me |
| DOI | 10.1016/j.orggeochem.2018.10.010 |
| 英文摘要 | Distributions of branched glycerol dialkyl glycerol tetraether (brGDGT) lipids are sensitive to environmental parameters, which enables their use in paleoenvironmental studies. In particular, the degree of methylation of brGDGTs (MBT and MBT') and the cyclization ratio of brGDGTs (CBT) are often used to estimate changes in temperature in paleoclimate studies. Application of these proxies requires reliable and precise calibrations to temperature. However, available calibrations of brGDGT proxies to temperature have large calibration errors in arid areas which suggests that other environmental variables influence brGDGT distributions in these areas. Here we analyze brGDGT distributions in soils from the Tibetan Plateau, an arid/semi-arid region with gradients in vegetation cover (forest, grassland, and desert) to examine: (1) the applicability of MBT'/CBT calibrations to reconstruct mean annual air temperature (MAAT); and (2) the effects of vegetation cover on temperature calibrations. We show that temperatures reconstructed using the global soil MBT'/CBT calibrations are warmer than instrumentally observed temperature, and that the calibrations are significantly influenced by the presence or absence of vegetation. Excluding sample sites without vegetation (bare soil) from temperature calibrations substantially improves the correlation between observed and reconstructed temperatures. Within the vegetated soils, we reanalyzed published global soil calibration datasets, including results of analyses that either did or did not separate 5- and 6-methyl brGDGT isomers, and find that the correlation between MBT'(5Me) and MBT' and temperature varies for different vegetation types (grass and forest) and that the error of temperature calibrations is reduced if calibrations are separated by the type of vegetative cover (grass or forest). We test these new calibrations in sequences from the Lantian and Mangshan loess of the Chinese Loess Plateau and find that reconstructed temperatures from both modern and Last Glacial Maximum sediments are more consistent with other reconstructions and climate model simulations when vegetation-specific calibrations are applied to the brGDGT data. The results indicate that changes in vegetation should be taken into consideration when applying brGDGT proxies to reconstruct past changes in climate. (C) 2018 Published by Elsevier Ltd. |
| WOS关键词 | LOESS-PALEOSOL SEQUENCE ; ISO-DIABOLIC ACID ; MEMBRANE-LIPIDS ; MICROBIAL COMMUNITY ; SURFACE SOILS ; EAST-ASIA ; DISTRIBUTIONS ; GDGTS ; PROXIES ; PH |
| 资助项目 | National Natural Science Foundation of China[41471055] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20050101] ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences[Y4BC011001] ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Program of China Scholarship Council[201604910815] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000454881700001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Program of China Scholarship Council ; Program of China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Program of China Scholarship Council ; Program of China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Program of China Scholarship Council ; Program of China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Alpine Ecology and Biodiversity, Chinese Academy of Sciences ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Open Research Fund of Key Laboratory of Tibetan Environment Changes and Land Surface Processes ; Program of China Scholarship Council ; Program of China Scholarship Council |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/90227]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Zhang, Gengxin |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA 4.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab West Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Lanzhou Ctr Oil & Gas Resources, Lanzhou 730000, Gansu, Peoples R China 6.China West Normal Univ, Land & Resource Coll, Nanchong 637002, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Jie,Russell, James M.,Xie, Haichao,et al. Vegetation effects on temperature calibrations of branched glycerol dialkyl glycerol tetraether (brGDGTs) in soils[J]. ORGANIC GEOCHEMISTRY,2019,127:1-11. |
| APA | Liang, Jie.,Russell, James M..,Xie, Haichao.,Lupien, Rachel L..,Si, Guicai.,...&Zhang, Gengxin.(2019).Vegetation effects on temperature calibrations of branched glycerol dialkyl glycerol tetraether (brGDGTs) in soils.ORGANIC GEOCHEMISTRY,127,1-11. |
| MLA | Liang, Jie,et al."Vegetation effects on temperature calibrations of branched glycerol dialkyl glycerol tetraether (brGDGTs) in soils".ORGANIC GEOCHEMISTRY 127(2019):1-11. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。