气候变化领域集成服务门户(CCPortal): A spectral approach to estimating the timescale-dependent uncertainty of paleoclimate records

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DOI	10.5194/cp-16-1469-2020
	A spectral approach to estimating the timescale-dependent uncertainty of paleoclimate records - Part 1: Theoretical concept
	Kunz T.; Dolman A.M.; Laepple T.
发表日期	2020
ISSN	18149324
起始页码	1469
结束页码	1492
卷号	16 期号:4
英文摘要	Proxy records represent an invaluable source of information for reconstructing past climatic variations, but they are associated with considerable uncertainties. For a systematic quantification of these reconstruction errors, however, knowledge is required not only of their individual sources but also of their auto-correlation structure as this determines the timescale dependence of their magnitude, an issue that has been often ignored until now. Here a spectral approach to uncertainty analysis is provided for paleoclimate reconstructions obtained from single sediment proxy records. The formulation in the spectral domain rather than the time domain allows for an explicit demonstration and quantification of the timescale dependence that is inherent in any proxy-based reconstruction uncertainty. This study is published in two parts. In this first part, the theoretical concept is presented, and analytic expressions are derived for the power spectral density of the reconstruction error of sediment proxy records. The underlying model takes into account the spectral structure of the climate signal, seasonal and orbital variations, bioturbation, sampling of a finite number of signal carriers, and uncorrelated measurement noise, and it includes the effects of spectral aliasing and leakage. The uncertainty estimation method, based upon this model, is illustrated by simple examples. In the second part of this study, published separately, the method is implemented in an application-oriented context, and more detailed examples are presented. © Author(s) 2020.
语种	英语
scopus关键词	conceptual framework; estimation method; paleoclimate; theoretical study; uncertainty analysis
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146683
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Research Unit Potsdam, Telegrafenberg A45, Potsdam, 14473, Germany; MARUM-Center for Marine Environmental Sciences, Faculty of Geosciences, University of Bremen, Bremen, 28334, Germany
推荐引用方式 GB/T 7714	Kunz T.,Dolman A.M.,Laepple T.. A spectral approach to estimating the timescale-dependent uncertainty of paleoclimate records - Part 1: Theoretical concept[J],2020,16(4).
APA	Kunz T.,Dolman A.M.,&Laepple T..(2020).A spectral approach to estimating the timescale-dependent uncertainty of paleoclimate records - Part 1: Theoretical concept.Climate of the Past,16(4).
MLA	Kunz T.,et al."A spectral approach to estimating the timescale-dependent uncertainty of paleoclimate records - Part 1: Theoretical concept".Climate of the Past 16.4(2020).