AccScience Publishing / AJWEP / Online First / DOI: 10.36922/AJWEP025160117
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ORIGINAL RESEARCH ARTICLE

Analyzing emission and carbon reduction support policies using latent Dirichlet allocation and a Sankey-bubble chart

Na Li1* ,  Xiaoming Wu1
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1 School of Economics and Management, Southwest Petroleum University, Chengdu, Sichuan, China
AJWEP, 025160117 https://doi.org/10.36922/AJWEP025160117
Received: 14 April 2025 | Revised: 17 June 2025 | Accepted: 27 June 2025 | Published online: 22 July 2025
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

This study presents an in-depth analysis of China’s emission and carbon reduction support policies from 2016 to 2023 using text mining techniques. The main objective is to examine the evolution, thematic focus, and implementation outcomes of these policies across different stages, thereby providing insights into their development patterns and potential future direction. Based on the latent Dirichlet allocation model implemented in Python 3.7, the study identified and refined 14 initial topic terms spanning three policy phases, which were subsequently integrated and interpreted. Through topic clustering and visualization using the Sankey-bubble chart, the research simulated the evolution of policy themes over time. The results reveal a clear shift in policy focus – from market-driven mechanisms to green development and technology-led approaches. In the later stages, policies exhibit more comprehensive and systematic characteristics. In conclusion, the study contributes to a deeper understanding of the development trajectory, orientation, and implementation effectiveness of China’s carbon reduction policies, offering valuable insights for future policy development.

Keywords
Emission and carbon reduction support policies
Evolutionary trends
Latent Dirichlet allocation
Sankey-bubble chart
Funding
This study was financially supported by National Social Science Fund of China Major Project Research on the high-quality development path of natural gas industry driven by the energy revolution’(No.22&ZD105) and the Sichuan Key Research Base of Humanities and Social Sciences (Project Approval No. ZYZX-YB-2411).
Conflict of interest
The authors declare that they have no competing interests.
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Asian Journal of Water, Environment and Pollution, Electronic ISSN: 1875-8568 Print ISSN: 0972-9860, Published by AccScience Publishing
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