DOI: 10.1111/gcb.12400
论文题名: Unusual forest growth decline in boreal North America covaries with the retreat of Arctic sea ice
作者: Girardin M.P. ; Guo X.J. ; De Jong R. ; Kinnard C. ; Bernier P. ; Raulier F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 3 起始页码: 851
结束页码: 866
语种: 英语
英文关键词: Bayesian
; Canada
; Carbon
; Climate change
; Multivariate adaptive regression splines
; Process-based model 3PG
; Quebec
; Regime shifts
; Satellite imagery
; Wavelet coherency
Scopus关键词: Bayesian analysis
; boreal forest
; carbon
; climate change
; forest ecosystem
; growth rate
; ice retreat
; multivariate analysis
; NDVI
; net primary production
; proxy climate record
; regression analysis
; satellite imagery
; sea ice
; tree ring
; wavelet analysis
; Arctic
; Canada
; Hudson Bay
; Hudson Strait
; Quebec [Canada]
; Bayesian
; carbon
; article
; Canada
; climate change
; growth, development and aging
; ice cover
; multivariate adaptive regression splines
; North America
; process-based model 3PG
; regime shifts
; satellite imagery
; spruce
; tree
; wavelet coherency
; bayesian
; Canada
; carbon
; climate change
; multivariate adaptive regression splines
; process-based model 3PG
; Quebec
; regime shifts
; satellite imagery
; wavelet coherency
; Climate Change
; Ice Cover
; North America
; Picea
; Trees
英文摘要: The 20th century was a pivotal period at high northern latitudes as it marked the onset of rapid climatic warming brought on by major anthropogenic changes in global atmospheric composition. In parallel, Arctic sea ice extent has been decreasing over the period of available satellite data records. Here, we document how these changes influenced vegetation productivity in adjacent eastern boreal North America. To do this, we used normalized difference vegetation index (NDVI) data, model simulations of net primary productivity (NPP) and tree-ring width measurements covering the last 300 years. Climatic and proxy-climatic data sets were used to explore the relationships between vegetation productivity and Arctic sea ice concentration and extent, and temperatures. Results indicate that an unusually large number of black spruce (Picea mariana) trees entered into a period of growth decline during the late-20th century (62% of sampled trees; n = 724 cross sections of age >70 years). This finding is coherent with evidence encoded in NDVI and simulated NPP data. Analyses of climatic and vegetation productivity relationships indicate that the influence of recent climatic changes in the studied forests has been via the enhanced moisture stress (i.e. greater water demands) and autotrophic respiration amplified by the declining sea ice concentration in Hudson Bay and Hudson Strait. The recent decline strongly contrasts with other growth reduction events that occurred during the 19th century, which were associated with cooling and high sea ice severity. The recent decline of vegetation productivity is the first one to occur under circumstances related to excess heat in a 300-year period, and further culminates with an intensifying wildfire regime in the region. Our results concur with observations from other forest ecosystems about intensifying temperature-driven drought stress and tree mortality with ongoing climatic changes. © 2013 John Wiley & Sons Ltd Reproduced with the permission of the Minister of Natural Resources Canada. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61974
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S, P.O. Box 10380, Stn. Sainte-Foy, Quebec, QC, G1V 4C7, Canada; Remote Sensing Laboratories, University of Zurich, Winterthurerstrasse 190, Zurich, CH-8057, Switzerland; Centro de Estudios Avanzados en Zonas Aridas, Casilla 554, Campus Andres Bello, Colina El Pino s/n., La Serena, Chile; Département des sciences de l'environnement, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7, Canada; Faculté de foresterie, de géographie et de géomatique, Université Laval, Quebec, QC G1V 0A6, Canada
Recommended Citation:
Girardin M.P.,Guo X.J.,De Jong R.,et al. Unusual forest growth decline in boreal North America covaries with the retreat of Arctic sea ice[J]. Global Change Biology,2014-01-01,20(3)