Fig. 5: Keyword bar charts for six topics derived from Henan climate adaptation petitions.
From: The 2021 Henan flood increased citizen demand for government-led climate change adaptation in China

Each panel displays the top-ranked keywords for a given topic, identified through BERTopic modeling. The horizontal axis represents the class-based TF-IDF score, which reflects the relative distinctiveness of each term within the corpus. Topics are indexed numerically (0–5) for identification; the numbering does not indicate importance. All keywords are in English translation from Mandarin Chinese petitions. Units are in arbitrary TF-IDF units. TF-IDF Term Frequency-Inverse Document Frequency.