Supplementary Material for: How nationalist rhetoric drives polarization over climate change in the US

Provides supplementary information on the process and method of analysing speech events for “How nationalist rhetoric drives polarization over climate change in the US,” to be published in Environmental Politics in 2025. This material includes the framework that informed analysis, an outline of the coding process and methodological considerations, and the codebook and related descriptions of the codes used when carrying out coding with NVivo.

本数据集为2025年将发表于《环境政治（Environmental Politics）》的论文《美国民族主义修辞如何推动气候变化议题极化》（How nationalist rhetoric drives polarization over climate change in the US）的演讲事件分析流程与方法提供补充信息。本补充材料包含支撑本次分析的分析框架、编码流程概述与方法论考量要点，以及使用NVivo开展编码时所采用的编码手册及相关编码说明。