气候变化领域集成服务门户(CCPortal): Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability

CCPortal

DOI	10.1007/s00382-020-05287-2
	Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability
	Seftigen K.; Fuentes M.; Ljungqvist F.C.; Björklund J.
发表日期	2020
ISSN	0930-7575
起始页码	579
结束页码	594
卷号	55
英文摘要	High-resolution hydroclimate proxy records are essential for distinguishing natural hydroclimate variability from possible anthropogenically-forced changes, since instrumental precipitation observations are too short to represent the whole spectrum of natural variability. In Northern Europe, progress in this field has been hampered by a relative lack of long and truly moisture-sensitive proxy records. In this study, we provide the first assessment of the dendroclimatic potential of Blue Intensity (BI) and partial ring-width measurements (latewood and earlywood width series) from a network of cold and drought-prone Pinus sylvestris L. sites in Sweden. Our results show that all tree-ring parameters and sites share a clear and strong sensitivity to warm-season precipitation. The ΔBI parameter, in particular, shows considerable potential for hydroclimate reconstructions, here permitting a cross-validated precipitation reconstruction capable of explaining 56% (1901–2010 period) of regional-scale warm-season high-frequency precipitation variance. Using ΔBI as an alternative to ring-width improves the predictive skill with nearly a 20 percentage points increase in explained variance, reduces signal instability over time as well as allows a broader seasonal window (May–July) to be reconstructed. Additionally, we found that earlywood BI also reflect a positive late winter through early summer temperature signal. These findings emphasize that tree-rings, and in particular wood density parameters such as from BI, are capable of providing fundamental information to advance our understanding of hydroclimate variability in regions with a cool and rather humid climate regime that traditionally has been overlooked in studies of past droughts. Increasing the spatio-temporal coverage of hydroclimate records in northern Europe, and taking full advantage of the opportunities offered by the wood densitometric properties should be considered a research priority. © 2020, The Author(s).
英文关键词	Blue Intensity; Dendroclimatology; Drought sensitivity; Fennoscandia; Hydroclimate; Scots pine; Tree-ring
语种	英语
scopus关键词	climate change; coniferous tree; dendroclimatology; drought; hydrometeorology; proxy climate record; sensitivity analysis; tree ring; Fennoscandia; Pinus sylvestris
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/145408
作者单位	Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain (UCL), Louvain-la-Neuve, Belgium; Swiss Federal Institute for Forest Snow and Landscape Research WSL, Birmensdorf, Switzerland; Department of History, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Swedish Collegium for Advanced Study, Uppsala, Sweden
推荐引用方式 GB/T 7714	Seftigen K.,Fuentes M.,Ljungqvist F.C.,et al. Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability[J],2020,55.
APA	Seftigen K.,Fuentes M.,Ljungqvist F.C.,&Björklund J..(2020).Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability.Climate Dynamics,55.
MLA	Seftigen K.,et al."Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability".Climate Dynamics 55(2020).