Atmospheric rivers (ARs) impacting western North America are analyzed under climate intervention applying stratospheric aerosol injections (SAI) using simulations produced by the Whole Atmosphere Community Climate Model. Sulfur dioxide injections are strategically placed to maintain present-day global, interhemispheric, and equator-to-pole surface temperatures between 2020 and 2100 using a high forcing climate scenario. Three science questions are addressed: (1) How will western North American ARs change by the end of the century with SAI applied, (2) How is this different from 2020 conditions, and (3) How will the results differ with no future climate intervention. Under SAI, ARs are projected to increase by the end of the 21st century for southern California and decrease in the Pacific Northwest and coastal British Columbia, following changes to the low-level wind. Compared to 2020 conditions, the increase in ARs is not significant. The character of AR precipitation changes under geoengineering results in fewer extreme rainfall events and more moderate ones.

影响北美西部的大气河流 (ARs) 在气候干预下使用全大气社区气候模型产生的模拟应用平流层气溶胶注入 (SAI) 进行分析。二氧化硫注入的战略位置是使用高压气候情景在 2020 年至 2100 年之间维持当今的全球、半球间和赤道到极地表面温度。解决了三个科学问题：（1）在本世纪末应用 SAI 后，北美西部的 AR 将如何变化，（2）这与 2020 年的条件有何不同，以及（3）在没有未来气候的情况下，结果将有何不同干涉。在 SAI 下，预计到 21 世纪末，南加州的 ARs 将增加，而在太平洋西北部和不列颠哥伦比亚省沿海地区，ARs 将减少，随着低层风的变化。与 2020 年的情况相比，AR 的增加并不显着。地球工程下AR降水变化的特征导致极端降雨事件较少，而中等降雨事件较多。