美国气候援助的地缘转向及其路径验证OA

Against the backdrop of global climate governance being severely disrupted by strategic competition between major powers,the United States is experiencing a significant shift in its climate aid from a global public good to a geostrategic tool.How this shift occurs and the mechanisms driving it are urgent questions that require scholarly attention.This study employed a combination of grounded theory coding,spatial visualization and two-layer policy analysis.It systematically examined U.S.climate aid practices across the Obama,Trump,and Biden administrations from three analytical dimensions:discourse narrative,spatiotemporal evolution,and policy instruments.The findings reveal that the geostrategic shift in U.S.climate aid advances synergistically across these three dimensions.In terms of discourse narrative,U.S.climate aid discourse has undergone a phased evolution from a"strategic altruism"narrative to an"America First"narrative and then to a"great-power competition"narrative,progressively constructing China as a"partner"in climate governance and subsequently as a"systemic rival"in the domain of climate aid.In terms of spatiotemporal evolution,the allocation of climate funds follows the logic of"strategic value screening,"with resources shifting from counterterrorism pivot states to Indo-Pacific strategic pivots,whereas regions with high climate vulnerability but limited strategic value are systematically marginalized.In terms of policy instruments,the shift has been institutionally consolidated through a two-tiered linkage of"domestic empowerment-external implementation"and the triple synergy of institutional rules,security alliances,and funding programs.These three dimensions do not operate in isolation but constitute an integrated whole:discourse shapes cognitive legitimacy,spatiotemporal patterns provide orientation for resource allocation,and policy instruments provide institutional support.The external drivers of this shift stem from the disruptive impact of China's Belt and Road Initiative and the rising discursive power of the Global South,while the internal drivers originate from the bipartisan consensus on hegemonic preservation amid political polarization and anticipated economic returns from the green industrial sector.This study demonstrates that the geostrategic shift in U.S.climate aid not only undermines the fairness and effectiveness of climate aid mechanisms but also poses a serious challenge to the global climate governance system.The academic contribution of this study lies in the construction of a comprehensive three-dimensional analytical framework that reveals the logical mechanism underlying the synergistic evolution of the geostrategic shift at the levels of intention,behavior,and institutions and provides a methodological reference for interdisciplinary research on climate politics.