气候变化领域集成服务门户(CCPortal): A proxy for all seasons? A synthesis of clumped isotope data from Holocene soil carbonates

CCPortal

DOI	10.1016/j.quascirev.2020.106259
	A proxy for all seasons? A synthesis of clumped isotope data from Holocene soil carbonates
	Kelson J.R.; Huntington K.W.; Breecker D.O.; Burgener L.K.; Gallagher T.M.; Hoke G.D.; Petersen S.V.
发表日期	2020
ISSN	0277-3791
卷号	234
英文摘要	Soil carbonates are important paleoclimate archives, but interpretations of their isotopic compositions (δ18O, δ13C, and Δ47) are hampered by uncertainty in the annual timing of their accumulation. Several previous studies have inferred the annual timing of soil carbonate formation by comparing modern air/soil temperatures with temperatures estimated from the clumped isotopic composition (TΔ47) of Holocene soil carbonates. Here, we compile the existing Δ47 data to first consider if recent changes in Δ47 standardization methods alters the apparent seasonal biases. Then we explore the importance of various environmental parameters on soil carbonate TΔ47 and discuss implications for associated paleoclimate reconstructions. Most soil carbonates record TΔ47 values higher than mean annual air temperature, but the residual varies from −4 to +24 °C. Δ47 values for most observed soil profiles do not vary with depth. We find that the grain size of the soil matrix, timing of precipitation, and presence of vegetation each explain a portion of the observed variance in seasonal bias and can be used to aid in interpretations of TΔ47 values from paleosols. In some soil carbonates, a warm-season bias in TΔ47 is accompanied with calculated δ18O values of soil water that appear to be biased toward the δ18O of summer rainfall. Most estimated values of δ18O of soil water are within 2‰ of the δ18O values of mean annual rainfall. Where possible, paleoclimate reconstructions should consider precipitation timing, soil texture, and vegetation cover to aid in identifying the seasonal bias of soil carbonate stable isotopic compositions. © 2020
英文关键词	Cenozoic; Global; Holocene; Paleoclimatology; Stable isotopes
语种	英语
scopus关键词	Carbonates; Carbonation; Rain; Soil moisture; Textures; Vegetation; Cenozoic; Global; Holocenes; Paleoclimatology; Stable isotopes; Isotopes; air-soil interaction; carbonate; Cenozoic; grain size; Holocene; isotopic composition; paleoclimate; precipitation (climatology); proxy climate record; reconstruction; soil profile; stable isotope; vegetation cover
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/151532
作者单位	Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Geological Sciences, University of Texas at Austin, Austin, TX, United States; Department of Marine, Earth, and Atmospheric Sciences, NC State University, Raleigh, NC, United States; Department of Earth Sciences, Syracuse University, Syracuse, NY, United States
推荐引用方式 GB/T 7714	Kelson J.R.,Huntington K.W.,Breecker D.O.,et al. A proxy for all seasons? A synthesis of clumped isotope data from Holocene soil carbonates[J],2020,234.
APA	Kelson J.R..,Huntington K.W..,Breecker D.O..,Burgener L.K..,Gallagher T.M..,...&Petersen S.V..(2020).A proxy for all seasons? A synthesis of clumped isotope data from Holocene soil carbonates.Quaternary Science Reviews,234.
MLA	Kelson J.R.,et al."A proxy for all seasons? A synthesis of clumped isotope data from Holocene soil carbonates".Quaternary Science Reviews 234(2020).