PDF(Pubmed)
Abstract：
South Africa faces the urgency to comprehensively understand and manage its methane (CH4) emissions. The primary aim of this study is to compare CH4 concentrations between Eastern Cape and Mpumalanga regions dominated by cattle farming and coal mining industries, respectively. CH4 concentration trends were analyzed for the period 2019 to 2023 using satellite data. Trend analysis revealed significant increasing trends in CH4 concentrations in both provinces, supported by Mann-Kendall tests that rejected the null hypothesis of no trend (Eastern Cape: p-value = 8.9018e-08 and Mpumalanga: p-value = 2.4650e-10). The Eastern Cape, a leading cattle farming province, exhibited cyclical patterns and increasing CH4 concentrations, while Mpumalanga, a major coal mining province, displayed similar increasing trends with sharper concentration points. The results show seasonal variations in CH4 concentrations in the Eastern Cape and Mpumalanga provinces. High CH4 concentrations are observed in the northwestern region during the December-January-February (DJF) season, while lower concentrations are observed in the March-April-May (MAM) and June-July-August (JJA) seasons in the Eastern Cape province. In the Mpumalanga province, there is a dominance of high CH4 concentrations in southwestern regions and moderately low concentrations in the northeastern regions, observed consistently across all seasons. The study also showed an increasing CH4 concentration trend from 2019 to 2023 for both provinces. The study highlights the urgent need to address CH4 emissions from both cattle farming and coal mining activities to mitigate environmental impacts and promote sustainable development. Utilizing geographic information system (GIS) and remote sensing technologies, policymakers and stakeholders can identify and address the sources of CH4 emissions more effectively, thereby contributing to environmental conservation and sustainable resource management.
摘要：
南非面临着全面了解和管理其甲烷（CH4）排放的紧迫性。这项研究的主要目的是比较东开普省和姆普马兰加省以养牛和煤炭开采业为主的CH4浓度，分别。使用卫星数据分析了2019年至2023年期间的CH4浓度趋势。趋势分析显示，两省CH4浓度呈显著上升趋势，由Mann-Kendall测试支持，该测试拒绝了无趋势的零假设（东开普省：p值=8.9018e-08和Mpumalanga：p值=2.4650e-10）。东开普省,一个领先的养牛省，表现出周期性模式和增加的CH4浓度，而Mpumalanga,煤炭开采大省,显示出类似的增长趋势，浓度点更尖锐。结果表明，东开普省和姆普马兰加省CH4浓度的季节性变化。在12月-1月-2月（DJF）季节期间，西北地区观察到高CH4浓度，而在东开普省的3月-4月-5月（MAM）和6月-7月-8月（JJA）季节观察到较低的浓度。在姆普马兰加省,西南地区CH4浓度高，东北地区浓度低，在所有季节都始终如一地观察。该研究还显示，从2019年到2023年，这两个省份的CH4浓度呈增加趋势。该研究强调迫切需要解决养牛和煤炭开采活动中的CH4排放问题，以减轻对环境的影响并促进可持续发展。利用地理信息系统（GIS）和遥感技术，政策制定者和利益相关者可以更有效地确定和解决CH4排放源，从而有助于环境保护和可持续的资源管理。
