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gcb12400-sup-0001-FigS1-S11-TabS1-S2.docWord document6264KData S1. Soil water balance in the StandLEAP model and parameter values. Figure S1. Comparison of monthly simulated fluxes by StandLEAP with those measured by eddy covariance technique in three black spruce stands. Figure S2. Examples of observed BAI vs. predicted BAI by negative exponential, linear and generalized negative exponential models. Figure S3. Scatterplots of the unfiltered annual simulated NPP vs. annual NDVI, and also for BAI time-series with these two parameters. Figure S4. Scatterplots of the filtered (year-on-year difference) annual simulated NPP vs. annual NDVI, and also for BAI time-series with these two parameters. Figure S5. Mean annual BAI curves of black spruce trees for various size classes. Figure S6. Correlation between monthly mean temperature and annual (a) BAI (period 1980–2007), (b) NDVI (period 1983–2011), (c) multi-proxy vegetation index (period 1980–2008) and (d) simulated NPP (period 1980–2008) data. Figure S7. Correlation between monthly sea ice concentration and non-prewhitened tree growth index and basal area increments. Figure S8. Scatterplots of the annual (a) BAI, (b) NDVI and (c) NPP vs. July mean sea ice concentration (%) of the year preceding ring formation. Figure S9. Spatial correlation maps showing the relationship between mean June to August Arctic sea ice concentration of the year of current growth and annual (a) BAI, (b) NDVI and (c) simulated NPP data. Figure S10. Wavelet coherence analyses conducted between black spruce annual tree growth index chronology and (a) multi-proxy reconstructions of Arctic temperatures, (b) multi-proxy reconstruction of Arctic sea ice extent and (c) documentary evidence for Hudson Strait sea ice severity. Figure S11. Scatterplot of the relationship between the annual proportion of trees entering a phase of growth decline and the annual area burned in the province of Quebec north of latitude 50.5°N. Table S1. Parameters and allometric coefficients used in the bioclimatic model StandLEAP. Table S2. Parameters for soil water calculation used in the bioclimatic model StandLEAP.

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