Stratospheric aerosol particles and solar-radiation management
Stratospheric aerosol particles and solar-radiation management
复制标题
DOI：
10.1038/nclimate1528
复制
发表时间：
2012-10-01
影响因子：
30.7
通讯作者：
Cox, R. A.
中科院分区：
文献类型：
--
作者：
Pope, F. D.;Braesicke, P.;Cox, R. A.
有人建议，故意向平流层注入粒子是一种可能的地球工程方案，以缓解气候变化造成的全球变暖问题。注入的粒子将太阳辐射散射回太空，从而降低了地球的辐射平衡。此前对该方案的研究主要集中在模拟火山喷发平流层气溶胶的硫酸颗粒上。然而，火山硫酸颗粒的组成和大小远不是散射太阳辐射的最佳条件。我们表明，含有其他成分的气雾剂，如矿物质，可以显著增加单位质量的光散射量，从而减少注射所需的颗粒质量。关于臭氧层的命运，讨论了将这种粒子注入平流层的化学后果。确定了用于评估此类地球工程方案可行性的研究问题。
The deliberate injection of particles into the stratosphere has been suggested as a possible geoengineering scheme to mitigate the global warming aspect of climate change. Injected particles scatter solar radiation back to space and thus reduce the radiative balance of Earth. Previous studies investigating this scheme have focused primarily on sulphuric acid particles to mimic volcanic injections of stratospheric aerosol. However, the composition and size of volcanic sulphuric acid particles are far from optimal for scattering solar radiation. We show that aerosols with other compositions, such as minerals, could be used to dramatically increase the amount of light scatter achieved on a per mass basis, thereby reducing the particle mass required for injection. The chemical consequences of injecting such particles into the stratosphere are discussed with regard to the fate of the ozone layer. Research questions are identified with which to assess the feasibility of such geoengineering schemes.