Louis Duchesne

TL;DR: Despite reductions in SO4 and H+ deposition, mass balance estimates indicate that acid deposition continues to acidify soils in many regions with losses of Ca and Mg of primary concern.

TL;DR: In this paper, a trend analysis was conducted on monthly ion concentrations in deposition and runoff when more than 9 years of data were available (14 regions, 17 sites) for 21 forested catchments from 17 regions in Canada, the United States and Europe.

TL;DR: The results showed a significant sugar maple growth rate reduction since 1960 on acid soils, which can be attributed, at least partially, to soil acidification and acid deposition levels.

TL;DR: Drought-induced reductions in tree growth were greatest when the droughts occurred during early- season peaks in radial growth, especially for trees growing in the warmest, driest regions, and it is found that future increases in early-season PET may exacerbate these effects, and potentially offset gains in C uptake and storage in ENA owing to other global change factors.

TL;DR: The results confirm the transitory nature of warming-induced growth benefits in the boreal forest and highlight the vulnerability of the ecosystem to excess warming and drying and predict that growth enhancements may be seen up to 2 °C warming, but would decline if temperatures exceed this.