Climate Change Data Portal
DOI | 10.1016/j.quascirev.2020.106245 |
Deglacial temperature controls on no-analog community establishment in the Great Lakes Region | |
Fastovich D.; Russell J.M.; Jackson S.T.; Williams J.W. | |
发表日期 | 2020 |
ISSN | 0277-3791 |
卷号 | 234 |
英文摘要 | Understanding the drivers of vegetation dynamics and no-analog communities in eastern North America is hampered by a scarcity of independent temperature indicators. We present a new branched glycerol dialkyl glycerol tetraether (brGDGT) temperature record from Bonnet Lake, Ohio (18–8 ka) and report uncertainty estimates based on Bayesian linear regression and bootstrapping. We also reanalyze a previously published brGDGT record from Silver Lake, Ohio, using improved chromatographic methods. All pollen- and brGDGT-based temperature reconstructions showed qualitatively similar deglacial trends but varying magnitudes. Separating 5- and 6- methyl brGDGTs resulted in substantially lower estimates of deglacial temperature variations (6.4 °C) than inferred from earlier brGDGT methods and pollen (11.8 °C, 12.0 °C respectively). Similar trends among proxies suggest good fidelity of brGDGTs to temperature, despite calibration uncertainties. At both sites, the rise and decline of no-analog communities closely track brGDGT-inferred temperatures, with a lag of 0–150 years. The timing of temperature and ecological events varies between Bonnet and Silver Lakes, likely due to age model uncertainties. Climate sensitivity analyses indicate a linear sensitivity of vegetation composition to temperature variations, albeit noisy and significant only with a 500-year bin. The formation of no-analog plant communities in the upper Midwest is closely linked to late-glacial warming, but other factors, such as temperature seasonality or end-Pleistocene megafaunal extinctions, remain viable. © 2020 Elsevier Ltd |
英文关键词 | Biomarkers; brGDGT; Climate sensitivity; Lagoons & swamps; Lakes; No-analog vegetation; North America; Paleoclimatology; Pleistocene; Pollen; Sedimentology; Temperature |
语种 | 英语 |
scopus关键词 | Biomarkers; Chromatographic analysis; Glycerol; Lakes; Sedimentology; Silver; Temperature; Temperature distribution; Uncertainty analysis; Vegetation; brGDGT; Climate sensitivity; North America; Paleoclimatology; Pleistocene; Pollen; Sensitivity analysis; deglaciation; paleoclimate; plant community; Pleistocene; pollen; sedimentology; temperature effect; vegetation dynamics; Great Lakes [North America]; Midwest; Silver Lake; United States |
来源期刊 | Quaternary Science Reviews |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/151528 |
作者单位 | Department of Geography, University of Wisconsin-Madison, Madison, WI 53706, United States; Center for Climatic Research, University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, United States; Southwest Climate Adaptation Science Center, U.S. Geologic Survey, Tucson, AZ 85721, United States; Department of Geosciences, University of Arizona, University of Arizona, Tucson, AZ 85721, United States |
推荐引用方式 GB/T 7714 | Fastovich D.,Russell J.M.,Jackson S.T.,et al. Deglacial temperature controls on no-analog community establishment in the Great Lakes Region[J],2020,234. |
APA | Fastovich D.,Russell J.M.,Jackson S.T.,&Williams J.W..(2020).Deglacial temperature controls on no-analog community establishment in the Great Lakes Region.Quaternary Science Reviews,234. |
MLA | Fastovich D.,et al."Deglacial temperature controls on no-analog community establishment in the Great Lakes Region".Quaternary Science Reviews 234(2020). |
条目包含的文件 | 条目无相关文件。 |
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。