American cities have played an increasingly critical role in advancing US climate change mitigation and adaptation. Subnational government support for these efforts, however, varies across social, political, economic, and biogeophysical contexts. While the influence of politics on US climate mitigation is well established, further research is required to identify barriers to—and discern complex influences on—US subnational climate action. This study examines the influences of power dynamics between public and private interests, political party affiliation within government and the public, and risk of climate impacts, on observed climate mitigation and adaptation efforts within 136 urban US cities and 33 states. The findings of this study shed light on the motivations of subnational governments to take climate action, and identify significant dynamics influencing the likelihood of key state or local government decision-makers to take climate action.

美国城市在促进美国减缓和适应气候变化中发挥着越来越重要的作用。然而，地方政府对这些努力的支持因社会，政治，经济和生物地球物理环境而异。尽管政治对美国减缓气候变化的影响已广为人知，但仍需要进一步研究来确定阻碍和辨别美国次国家气候变化行动的障碍。这项研究研究了美国136个城市和33个州在公共和私人利益之间的权力动态，政府与公众之间的政党隶属关系以及气候影响的风险对气候减缓和适应工作的影响。这项研究的结果揭示了地方政府采取气候行动的动机，