Análise de satélite identifica 40% mais metano das minas de carvão australiano | Ember

Satellite analysis identifies 40% more methane from Australian coal mines

A collaborative satellite-comparison of Australia’s coal mine methane emissions reveals higher greenhouse gases than officially reported

16 de abril de 2025
47 minutos lido
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ÍNDICE

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3
Variabilidade contábil de emissões
Leia o capítulo
3.1
Background
LEIA SEÇÃO
3.2
The impact of Method 2 in NSW
Read Section
3.4 || 575
Ongoing Review
Read Section
Conclusion
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Destaques

40%
Estimativas de satélite do carvão preto da Austrália identificou 40% mais metano
2x NSW || coal
Fugitive emissions in NSW were twice as high as official reporting, covering only half the coal
4-6x
Emissions estimates from open-cut mines in NSW reduced by 4-6x following site-specific estimation shift

Executive Summary

Satellite data shows 40% more emissions than national reports

Satellite examination of mines responsible for less than four-fifths of Australia’s coal production found that these mines emit 40% more than Australia’s reported total.

Australia’s coal mine methane emissions reporting remains under a cloud of international scrutiny. Building on a body of nationally reported data, peer-reviewed satellite assessments, and independent estimates from Kayrros, Ember assessed coal mine methane emissions across six key coal mining clusters.

The preliminary results of this study, which cover approximately four-fifths of Australia’s black coal production, indicate fugitive methane levels at least 40% higher than officially reported for the country as a whole. In New South Wales (NSW), which has largely shifted emissions reporting of open-cut mining towards company-led estimates, this study found fugitive emissions levels twice as high as officially reported, whilst only covering two-thirds of total coal production.

Critically, this study’s areas included more than 90% of Australia’s metallurgical coal production, indicating significant potential for emissions uncertainty within the key steelmaking coal supply chains.

01

40% higher fugitive methane

Satellite estimates, covering only 79% of Australia’s black coal production, identified 40% more fugitive methane than officially reported in 2020.

02

Twice NSW fugitive estimate

Estimativas baseadas no Estado de fugitivos de carvão, cobrindo 60 a 64% da produção de carvão do estado, indicou níveis de metano 90% mais altos em 2020 e 106% mais altos em 2021.

03

== Metalurgical Coal Coal

Essas estimativas de satélite incorporam mais de 90% da produção metalúrgica de carvão da Austrália, indicando níveis significativos de incerteza de emissões que podem ser incorporados nas cadeias de suprimentos de aço internacionais. agora iniciou uma revisão departamental do impacto dos relatórios de emissões liderados pela empresa.

These preliminary findings come after a year-long national inquiry into methane measurement approaches, during which the government appointed an Expert Panel to provide advice on atmospheric measurement of fugitive methane emissions in Australia and has now initiated a departmental review of the impact of company-led emissions reporting.

Este estudo destaca a natureza crítica de ambas as revisões. Ele descobre que, sem mudanças significativas no inventário de relatórios de metano de mina de carvão da Austrália, os formuladores de políticas da Austrália e as cadeias de suprimentos internacionais de fabricação de aço permanecerão no escuro sobre a escala total das emissões de metano de mina de carvão da Austrália. Essas descobertas destacam que, se não melhorarmos os relatórios, não apenas nossas próprias emissões poderiam ser imprecisas, mas nossos clientes internacionais não podem saber com certeza qual é a escala de emissões incorporada em suas cadeias de suprimentos. Este relatório, todos apontam para a mesma descoberta: há uma lacuna significativa entre as emissões relatadas e as estimativas baseadas em satélite. É crucial fechar essa lacuna de conhecimento para entender melhor onde as reduções de emissões podem ser feitas. Dado o alto potencial de aquecimento global do metano, melhorar os relatórios é essencial para identificar e implementar estratégias eficazes de mitigação. Conteúdo

Australia’s coal mine methane emissions remain under a cloud of international scrutiny. These findings highlight that if we don’t improve reporting, not only could our own emissions accounting be inaccurate, but our international customers can’t know for certain what the scale of emissions lie embedded in their supply chains.

Satellite estimates, including the one generated for this report, all point to the same finding: there is a significant gap between reported emissions and satellite-based estimates. It is crucial to close this knowledge gap to better understand where emission reductions can be made. Given methane’s high global warming potential, improving reporting is essential for identifying and implementing effective mitigation strategies.

Next Chapter
1: Estimating CMM emissions
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