气候变化领域集成服务门户(CCPortal): Identifying bias in cold season temperature reconstructions by beetle mutual climatic range methods in the Pliocene Canadian High Arctic

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DOI	10.1016/j.palaeo.2018.11.025
	Identifying bias in cold season temperature reconstructions by beetle mutual climatic range methods in the Pliocene Canadian High Arctic
	Fletcher T.L.; Csank A.Z.; Ballantyne A.P.
发表日期	2019
ISSN	0031-0182
起始页码	672
结束页码	676
卷号	514
英文摘要	Well-preserved beetle elytra from the fossil and subfossil record are used by palaeoclimatologists to estimate past temperatures. Beetle-derived estimates of temperature across the Pliocene Arctic are consistently lower than those derived from other palaeoclimate proxies. Here we test if that pattern is attributable to either the modern dataset or specific mutual climatic range method (MCRM). We used a global dataset of observations (Global Biodiversity Information Facility) for modern beetles as opposed to a North American regional dataset, and a consistent MCRM for comparison to vegetation-derived estimates, termed CRACLE (Climate Reconstruction Analysis using Coexistence Likelihood Estimation), rather than different MCRM methods for each analysis. Beetle-derived estimates from one site, Beaver Pond, are consistently much lower than the vegetation-derived estimates, stable isotope results from flora and fauna, and summer temperatures from bacterial tetraethers. The reanalysis of beetle data produced a small reduction in proxy estimate mismatch overall. We found good agreement among proxy estimates of maximum temperature of the warmest month for two of the three sites in the Canadian Arctic, but increasingly poorer agreement for warmest quarter, coldest quarter and minimum temperature of the coldest month. This pattern may be due to beetles’ avoidance mechanisms and a climate space different from modern calibration sets during the Pliocene. Beetle derived temperature estimates, especially cold season, should be interpreted with caution when reconstructing palaeoclimates. © 2018
英文关键词	Coleoptera; CRACLE; Palaeoproxy; Vegetation; Winter
语种	英语
scopus关键词	air temperature; bacterium; beetle; calibration; fossil record; identification method; paleoclimate; Pliocene; proxy climate record; reconstruction; stable isotope; vegetation dynamics; winter; Canada; Canadian Arctic; North America; Bacteria (microorganisms); Coleoptera
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151128
作者单位	Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT, United States; Department of Geography, University of Nevada, Reno, NV, United States
推荐引用方式 GB/T 7714	Fletcher T.L.,Csank A.Z.,Ballantyne A.P.. Identifying bias in cold season temperature reconstructions by beetle mutual climatic range methods in the Pliocene Canadian High Arctic[J],2019,514.
APA	Fletcher T.L.,Csank A.Z.,&Ballantyne A.P..(2019).Identifying bias in cold season temperature reconstructions by beetle mutual climatic range methods in the Pliocene Canadian High Arctic.Palaeogeography, Palaeoclimatology, Palaeoecology,514.
MLA	Fletcher T.L.,et al."Identifying bias in cold season temperature reconstructions by beetle mutual climatic range methods in the Pliocene Canadian High Arctic".Palaeogeography, Palaeoclimatology, Palaeoecology 514(2019).