INVISIBLE METHANE: LEGAL RECOGNITION AND REGULATORY CHOICE FOR EMISSIONS CAUSED BY PERMAFROST DEGRADATION

Climate law addresses methane most readily when there is an identifiable source and a regulated actor. Methane released or accumulated as permafrost degrades often falls outside that model. It may have no operator, its link to a particular site may require specific proof, and aggregate natural emissions are not separately reported in national climate accounts. Yet permafrost feedback affects the remaining carbon budget and, in turn, the scale of mitigation needed. This article asks how legal recognition of permafrost methane can support mitigation: by making the feedback visible and by preventing thaw caused by economic activity.

The study covers terrestrial permafrost in the Arctic States. Russia is the main case study because, among the jurisdictions reviewed, it has the most developed permafrost legislation. Alaska (United States), Canada and Norway (Svalbard) are comparative benchmarks. The sources reviewed reveal no integrated regime in any of the four jurisdictions that links permafrost monitoring, methane assessment and climate reporting. Using applied legal engineering, the article distinguishes three situations: aggregate emissions, which require science-based disclosure; a localized natural flux or gas accumulation, which requires registration, verification and risk assessment; and a flux linked to economic activity, which may trigger operator duties and liability. It explains how a confirmed indicator becomes a legal fact through a recognition procedure with a defined evidentiary threshold. Natural emissions should not automatically be attributed to the State for responsibility or NDC-compliance purposes. Nor should compliance with mandatory operator duties count as an additional mitigation outcome. Recognition also has an economic dimension: thresholds affect the allocation of monitoring and adaptation resources, the cost of uncertainty and the choice of regulatory instrument. Methane is therefore a test case for a broader framework for permafrost degradation under changing physical conditions, uncertain causation and unevenly distributed costs.