Seasonally Modulated Stratospheric Aerosol Geoengineering Alters the Climate Outcomes
Seasonally Modulated Stratospheric Aerosol Geoengineering Alters the Climate Outcomes
复制标题
DOI：
10.1029/2020gl088337
复制
发表时间：
2020-06
影响因子：
5.2
通讯作者：
D. Visioni;D. MacMartin;B. Kravitz;J. Richter;S. Tilmes;M. Mills
中科院分区：
文献类型：
--
作者：
D. Visioni;D. MacMartin;B. Kravitz;J. Richter;S. Tilmes;M. Mills
通过反射一些入射的太阳辐射，利用二氧化硫进行平流层气溶胶干预将降低全球平均温度。以前的研究表明，多个注入纬度不仅可以用来维持全球平均温度，还可以维持半球间和赤道到极点的温度梯度。然而，区域气候响应不仅取决于SO2注入的位置，还取决于何时注入。我们在这里表明，即使有这些相同的目标和相同的纬度选择，只注入一个季节，而不是连续全年在区域气候的显着差异，例如在印度的降水量变化的幅度。不同的结果突出了潜在的权衡，不同的部署选择导致不同的利益或危害分布。在发展治理时应考虑气候工程的这一方面，并强调需要更深入地了解区域应对措施的机制。
By reflecting some incoming solar radiation, stratospheric aerosol intervention using SO2 would reduce global mean temperature. Previous research has shown that multiple injection latitudes can be used to maintain not only global mean temperature, but also interhemispheric and equator‐to‐pole temperature gradients. However, the regional climate response depends not only on where the SO2 is injected, but also on when. We show here that even with these same objectives and same choices of latitudes, injecting in only one season instead of continuously throughout the year results in significant differences in regional climate, for instance in the magnitude of precipitation changes over India. The differential outcomes highlight the potential for underlying trade‐offs, with different choices regarding deployment leading to a different distribution of benefits or harms. This aspect of climate engineering should be considered in developing governance and emphasizes the need for a deeper understanding of the mechanisms underlying the regional responses.