气候变化领域集成服务门户(CCPortal): Concord and discord among Northern Hemisphere paleotemperature reconstructions from tree rings

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DOI	10.1016/j.quascirev.2018.11.013
	Concord and discord among Northern Hemisphere paleotemperature reconstructions from tree rings
	St. George S.; Esper J.
发表日期	2019
ISSN	0277-3791
起始页码	278
结束页码	281
卷号	203
英文摘要	We review the current generation of large-scale, millennial-length temperature reconstructions derived from tree rings and highlight areas of agreement and disagreement among these state-of-the-art paleotemperature estimates. Although thousands of tree ring-width chronologies are now available from temperate and boreal forest sites across the Northern Hemisphere, only a small fraction of those records are suited as proxies for surface temperature. Maximum latewood density is clearly a superior temperature proxy but is less available, with few densitometric records that are both long and up-to-date. Compared to previous efforts, the newest generation of tree-ring reconstructions correlate more strongly against hemispheric summer temperatures and show better performance in tracking decadal/multi-decadal variability and year-to-year fluctuations. They also fit the observed memory structure of instrumental temperatures more closely than their predecessors. These new estimates still show signs of the so-called ‘divergence problem’ (the apparent loss of temperature sensitivity under recent warming), but do not extend after 2004 and cannot be used to evaluate the impact of the past decade's warming on northern temperature-limited forests. We caution against averaging together the latest hemispheric-scale reconstructions because they have each been constructed to suit different purposes and share much of the same underlying tree-ring data, especially prior to CE 1500. Past temperatures are recorded more clearly in maximum latewood density than total ring-width, so we recommend the Northern Hemisphere densitometry network be modernized through a new round of field collections and observations. © 2018 Elsevier Ltd
英文关键词	Common era; Dendroclimatology; Northern hemisphere; Paleotemperature; Temperature; Tree rings
语种	英语
scopus关键词	Forestry; Repair; Common era; Dendroclimatology; Northern Hemispheres; Paleotemperatures; Tree rings; Temperature; boreal forest; dendrochronology; dendroclimatology; Northern Hemisphere; paleotemperature; reconstruction; temperate forest; tree ring
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/152078
作者单位	Department of Geography, Environment and Society, University of Minnesota, Minneapolis, United States; Department of Geography, Johannes Gutenberg University, Mainz, Germany
推荐引用方式 GB/T 7714	St. George S.,Esper J.. Concord and discord among Northern Hemisphere paleotemperature reconstructions from tree rings[J],2019,203.
APA	St. George S.,&Esper J..(2019).Concord and discord among Northern Hemisphere paleotemperature reconstructions from tree rings.Quaternary Science Reviews,203.
MLA	St. George S.,et al."Concord and discord among Northern Hemisphere paleotemperature reconstructions from tree rings".Quaternary Science Reviews 203(2019).