Research press release


Nature Climate Change

Sinking expectations


今回、T Hudiburgたちは、バイオエネルギー収穫と間伐で「森林火災のリスク低減」と「炭素排出量削減」の2つの目標を達成できるのかどうかを調べるため、米国西海岸の森林地帯の80タイプの森林の資源調査データを分析した。そして、大部分の生態地域では、現在の炭素シンクが十分に強力なため、森林のバイオエネルギーによる化石燃料の代替によって炭素シンクの機能が失われることはないことが判明した。


Fire prevention measures and large-scale bioenergy harvest in US West Coast forests could lead to 2-14% higher emissions over the next 20 years compared with current management practices. These findings, published online this week in Nature Climate Change, could have implications for the role of forest bioenergy in carbon mitigation policy in the US.

To investigate whether bioenergy harvest and forest thinning can meet the twin goals of reducing fire risk and carbon emissions, Tara Hudiburg and co-workers analysed inventory data for 80 forest types from US West Coast forests. They found that for the majority of ecoregions, the current carbon sink is sufficiently strong that it cannot be matched by substitution of fossil fuels by forest bioenergy.

The situation may change, however, if the carbon sink in these regions weakens below the current level owing to insect infestations, fire emissions or reduced primary production, say the authors. These findings emphasize the need to consider current forest carbon balance, local forest conditions and ecosystem sustainability in establishing effective mitigation policy.

doi: 10.1038/nclimate1264


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