气候变化领域集成服务门户(CCPortal): Distinct seasonal climate drivers revealed in a network of tree-ring records from Labrador; Canada

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DOI	10.1007/s00382-019-05092-6
	Distinct seasonal climate drivers revealed in a network of tree-ring records from Labrador; Canada
	Parfitt R.; Ummenhofer C.C.; Buckley B.M.; Hansen K.G.; D’Arrigo R.D.
发表日期	2020
ISSN	0930-7575
起始页码	1897
结束页码	1911
卷号	54
英文摘要	Traditionally, high-latitude dendroclimatic studies have focused on measurements of total ring width (RW), with the maximum density of the latewood (MXD) serving as a complementary variable. Whilst MXD has typically improved the strength of the growing season climate connection over that of RW, its measurements are costly and time-consuming. Recently, a less costly and more time-efficient technique to extract density measurements has emerged, based on lignin’s propensity to absorb blue light. This Blue Intensity (BI) methodology is based on image analyses of finely-sanded core samples, and the relative ease with which density measurements can be extracted allows for significant increases in spatio-temporal sample depth. While some studies have attempted to combine RW and MXD as predictors for summer temperature reconstructions, here we evaluate a systematic comparison of the climate signal for RW and latewood BI (LWBI) separately, using a recently updated and expanded tree ring database for Labrador, Canada. We demonstrate that while RW responds primarily to climatic drivers earlier in the growing season (January–April), LWBI is more responsive to climate conditions during late spring and summer (May–August). Furthermore, RW appears to be driven primarily by large-scale atmospheric dynamics associated with the Pacific North American pattern, whilst LWBI is more closely associated with local climate conditions, themselves linked to the behaviour of the Atlantic Multidecadal Oscillation. Lastly, we demonstrate that anomalously wide or narrow growth rings consistently respond to the same climate drivers as average growth years, whereas the sensitivity of LWBI to extreme climate conditions appears to be enhanced. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	Atlantic Multidecadal Oscillation; atmospheric dynamics; climate conditions; dendroclimatology; seasonal variation; tree ring; Canada; Labrador; Newfoundland and Labrador
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145614
作者单位	Department of Earth Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Parfitt R.,Ummenhofer C.C.,Buckley B.M.,et al. Distinct seasonal climate drivers revealed in a network of tree-ring records from Labrador; Canada[J],2020,54.
APA	Parfitt R.,Ummenhofer C.C.,Buckley B.M.,Hansen K.G.,&D’Arrigo R.D..(2020).Distinct seasonal climate drivers revealed in a network of tree-ring records from Labrador; Canada.Climate Dynamics,54.
MLA	Parfitt R.,et al."Distinct seasonal climate drivers revealed in a network of tree-ring records from Labrador; Canada".Climate Dynamics 54(2020).