Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft
Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft
复制标题
通过飞机排放可冷凝蒸气有效形成用于气候工程的平流层气溶胶
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
David William Keith
中科院分区：
文献类型：
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作者：
J. Pierce;D. Weisenstein;P. Heckendorn;T. Peter;David William Keith
最近的分析表明，通过排放SO2等不可冷凝蒸汽进行平流层气溶胶气候工程的有效性是有限的，因为向H2SO4的缓慢转化往往会产生过大的气溶胶颗粒；SO2注入的效率可能非常低，以至于很难抵消由于CO2加倍而产生的辐射强迫。在这里，我们描述了一种替代方法，其中气溶胶在从飞机注入H2SO4（一种可冷凝蒸汽）后在羽流中迅速形成。该方法可以更好地控制颗粒大小，并且可以在较低的硫负荷下产生比SO2注入更大的辐射强迫。相对于SO2注入，它可以减少地球工程的一些不利影响，如平流层下部的辐射加热。然而，这种方法并不能改变这样一个事实，即这种地球工程辐射强迫充其量只能部分补偿二氧化碳造成的气候变化。
Recent analysis suggests that the effectiveness of stratospheric aerosol climate engineering through emission of non‐condensable vapors such as SO2 is limited because the slow conversion to H2SO4 tends to produce aerosol particles that are too large; SO2 injection may be so inefficient that it is difficult to counteract the radiative forcing due to a CO2 doubling. Here we describe an alternate method in which aerosol is formed rapidly in the plume following injection of H2SO4, a condensable vapor, from an aircraft. This method gives better control of particle size and can produce larger radiative forcing with lower sulfur loadings than SO2 injection. Relative to SO2 injection, it may reduce some of the adverse effects of geoengineering such as radiative heating of the lower stratosphere. This method does not, however, alter the fact that such a geoengineered radiative forcing can, at best, only partially compensate for the climate changes produced by CO2.