Methane emissions from rice paddies in the Yangtze River Delta region of China: synthesis of new estimates

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES International Journal of Environmental Science and Technology Pub Date : 2024-09-18 DOI:10.1007/s13762-024-06050-4

Y. Zhu, H. Li

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Abstract

Agriculture (e.g., rice paddies) emissions have been considered one of the main sources contributing to the revived atmospheric methane (CH₄) increase since 2007 while it remains debated. In this study, we synthesized available paddy field CH₄ emissions from publications in a representative region of China. The results showed that CH₄ emissions exhibited strong variation among the 416 samples. Compared to the period 2000–2009, CH₄ emissions significantly (p < 0.01) increased during 2010–2018 and the average (252.17 kg ha^-1) was 1.52 times higher than that in 2000–2009 (146.02 kg ha^-1), which was consistent with the trend of atmospheric CH₄ concentrations. CH₄ emissions were significantly affected by both air temperature and water saving practices, however, this was not likely the reason for the increase after 2009. This study provides a quantitative estimate of regional CH₄ emissions based on available data, although the connection with the revived atmospheric CH₄ increase since 2007 remains uncertain.

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中国长江三角洲地区稻田甲烷排放量：新估算值综述

自 2007 年以来，农业（如水稻田）排放一直被认为是导致大气中甲烷（CH4）重新增加的主要来源之一，但目前仍存在争议。在这项研究中，我们综合了中国一个代表性地区出版物中现有的稻田甲烷排放量。结果表明，416 个样本的 CH4 排放量差异很大。与 2000-2009 年期间相比，2010-2018 年期间的 CH4 排放量显著增加（p < 0.01），平均值（252.17 kg ha-1）是 2000-2009 年期间（146.02 kg ha-1）的 1.52 倍，这与大气中 CH4 浓度的变化趋势一致。CH4排放量受气温和节水措施的影响很大，但这不可能是2009年后排放量增加的原因。本研究根据现有数据对区域 CH4 排放量进行了定量估算，但与 2007 年以来大气中 CH4 浓度再次上升之间的关系仍不确定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.