Dynamic Evaluation of Ecosystem Service Value in Longyan City Using a Climate-Adjusted Equivalent Factor Method

Climate change economics plays a critical role in quantifying the economic impacts of climate change and guiding policy decisions. This study evaluates the spatiotemporal dynamics of Ecosystem Service Value (ESV) in Longyan City, China, from 2008 to 2020 using an improved equivalent factor method incorporating climate-sensitive adjustments for temperature, net primary productivity (NPP), and precipitation. The results reveal a significant increase in total ESV from 515.38 billion to 909.16 billion yuan, driven primarily by regulatory services (e.g., climate regulation and hydrological management) and forest ecosystems. Notably, cultural services grew fastest (22.93% annually), reflecting the economic potential of eco-tourism. By integrating temperature-sensitive carbon sequestration models and dynamic tourism income weights, the refined method reduces errors in regulatory and cultural service valuations by 62.3% and 16.7%, respectively, compared to traditional approaches. These findings highlight the economic benefits of forest conservation and climate mitigation policies, providing empirical evidence for optimizing climate adaptation strategies and ecological compensation mechanisms. The study contributes to climate change economics by advancing methodologies for valuing ecosystem resilience under climate variability and informing sustainable development policies.