Wigley T M L
National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307-3000, USA.
Science. 2006 Oct 20;314(5798):452-4. doi: 10.1126/science.1131728. Epub 2006 Sep 14.
Projected anthropogenic warming and increases in CO2 concentration present a twofold threat, both from climate changes and from CO2 directly through increasing the acidity of the oceans. Future climate change may be reduced through mitigation (reductions in greenhouse gas emissions) or through geoengineering. Most geoengineering approaches, however, do not address the problem of increasing ocean acidity. A combined mitigation/geoengineering strategy could remove this deficiency. Here we consider the deliberate injection of sulfate aerosol precursors into the stratosphere. This action could substantially offset future warming and provide additional time to reduce human dependence on fossil fuels and stabilize CO2 concentrations cost-effectively at an acceptable level.
预计的人为变暖以及二氧化碳浓度上升带来了双重威胁，既源于气候变化，也源于二氧化碳本身，它会直接增加海洋酸度。未来的气候变化可以通过缓解措施（减少温室气体排放）或地球工程来减轻。然而，大多数地球工程方法并未解决海洋酸度上升的问题。缓解措施与地球工程相结合的策略可以消除这一缺陷。在此，我们考虑向平流层有意注入硫酸盐气溶胶前体。这一行动能够大幅抵消未来的变暖，并提供额外时间，以便在以可承受的成本有效降低人类对化石燃料的依赖并将二氧化碳浓度稳定在可接受水平。
