期刊
NATURE CLIMATE CHANGE
卷 5, 期 9, 页码 887-+出版社
NATURE PORTFOLIO
DOI: 10.1038/NCLIMATE2697
关键词
-
资金
- International Arctic Science Committee
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig (sTUNDRA working group)
- EnviroNorth CREATE grant
- International Polar Year Programs of the Government of Canada
- Natural Sciences and Engineering Research Council of Canada
- Northern Scientific Training Program
- INTERACT [262693]
- Virtual Institute ICLEA of the Helmholtz Foundation
- Wageningen University
- Research Center, Darwin Center for Biogeosciences, Danish National Research Foundation [CENPERM DNRF100]
- Swedish Polar Secretariat
- Academy of Finland, Nordic Centre of Excellence TUNDRA
- NASA Land Cover/Land-Use Change Program
- Natural Environment Research Council Independent Research Fellowship [NE/L011859/1]
- Research Council of Norway [212897]
- Fonds de recherche du Quebec: Nature et technologies
- Centre d'etudes Nordiques, ArcticNet-a network of centres of excellence
- Polar Continental Shelf Program
- Canada Foundation for Innovation
- WSL Institute for Snow and Avalanche Research SLF
- Knud Hojgaard Charity Foundation
- Northern Worlds initiative of the National Museum of Denmark
- IPY-NWO [851.40.051]
- Polish National Science Centre [N306 009139]
- National Science Foundation [ARC-0806506]
- University of Zurich Research Priority Program 'Global Change and Biodiversity'
- Woods Hole Research Center
- Research Council of Norway
- EU ATANS Grant [FP6506004]
- German Federal Environment Foundation [20008/983]
- Natural Environment Research Council [NE/M016323/1, NE/L011859/1] Funding Source: researchfish
- NERC [NE/L011859/1, NE/M016323/1] Funding Source: UKRI
Rapid climate warming in the tundra biome has been linked to increasing shrub dominance(1-4). Shrub expansion can modify climate by altering surface albedo, energy and water balance, and permafrost(2,5-8), yet the drivers of shrub growth remain poorly understood. Dendroecological data consisting of multi-decadal time series of annual shrub growth provide an underused resource to explore climate-growth relationships. Here, we analyse circumpolar data from 37 Arctic and alpine sites in 9 countries, including 25 species, and similar to 42,000 annual growth records from 1,821 individuals. Our analyses demonstrate that the sensitivity of shrub growth to climate was: (1) heterogeneous, with European sites showing greater summer temperature sensitivity than North American sites, and (2) higher at sites with greater soil moisture and for taller shrubs (for example, alders and willows) growing at their northern or upper elevational range edges. Across latitude, climate sensitivity of growth was greatest at the boundary between the Low and High Arctic, where permafrost is thawing(4) and most of the global permafrost soil carbon pool is stored(9). The observed variation in climate-shrub growth relationships should be incorporated into Earth system models to improve future projections of climate change impacts across the tundra biome.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据