D'Arrigo et al. 1987

D'Arrigo, R., G.C. Jacoby, and I.Y. Fung, 1987: Boreal forests and atmosphere-biosphere exchange of carbon dioxide. Nature, 329, 321-323, doi:10.1038/329321a0.

The response of vegetation growth to fluctuations in climate or anthropogenic influences is an important consideration in the evaluation of the contribution of land biota to atmospheric CO₂ variations. Here we present two approaches to investigate the role of boreal forests in the global carbon cycle. First, a tracer transport model which incorporates the normalized-difference vegetation index (NDVI) obtained from advanced very high resolution radiometer (AVHRR) radiances was used to simulate the annual cycle of CO₂ in the atmosphere. Results indicate that the seasonal growth of the combined boreal forests of North America and Eurasia accounts for about 50% of the mean seasonal CO₂ amplitude recorded at Pt. Barrow, Alaska (71°N, 157°W) and about 30% of the more globally representative CO₂ signal at Mauna Loa, Hawaii (20°N, œW). Second, tree-ring width data from four boreal treeline sites in northern Canada were postively correlated with Pt. Barrow CO₂ drawdown (that is, a maximum-minimum CO₂ concentration) for the period 1971-1982. These results suggest that large-scale changes in the growth of boreal forests may be contributing to the observed increasing trend in CO₂ amplitude. They further suggest that tree-ring data may be applicable as indices for CO₂ uptake and remote sensing estimates of photosynthetic activity.

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D'Arrigo, R., Jacoby, G.C., and Fung, I.Y.: Boreal forests and atmosphere-biosphere exchange of carbon dioxide, Nature, 329, 321-323, doi:10.1038/329321a0, 1987.

D'Arrigo, R., G.C. Jacoby, and I.Y. Fung (1987), Boreal forests and atmosphere-biosphere exchange of carbon dioxide, Nature, 329, 321-323, doi:10.1038/329321a0.

D'Arrigo, R., G.C. Jacoby, and I.Y. Fung, 1987: Boreal forests and atmosphere-biosphere exchange of carbon dioxide. Nature, 329, 321-323, doi:10.1038/329321a0.

D'Arrigo, R., Jacoby, G.C., & Fung, I.Y. 1987, Nature, 329, 321, doi:10.1038/329321a0.

D'Arrigo R, Jacoby GC, Fung IY. Boreal forests and atmosphere-biosphere exchange of carbon dioxide, Nature 1987;329:321-323. doi:10.1038/329321a0.

R. D'Arrigo, G.C. Jacoby, I.Y. Fung, Nature 329, 321-323, doi:10.1038/329321a0 (1987).