ノルド・ストリームの海底パイプラインからのメタン排出量
Stephen J Harris1, Stefan Schwietzke2,3, James L France3,4
1United Nations Environment Programme's International Methane Emissions Observatory (UNEP's IMEO), Paris, France. stephen.harris@un.org.
Nature
|January 15, 2025
まとめ
北流のパイプラインの漏れは 推定46万5千トンのメタンを放出しました この重要な出来事は,よりよいメタン排出量監視と緩和戦略の必要性を強調しています.
科学分野:
- 環境科学
- 大気化学
- 地理学
背景:
- ノルド・ストリームパイプラインの漏れによるメタン排出量は不確実な推定であり,ボトムアップとトップダウンのアプローチの調和を妨げています.
- 大気中の排出量の時間的な変動はよくわかっていなかったため,正確な定量化が困難であった.
研究 の 目的:
- ノルドストリームパイプラインの漏れによる大気中のメタン排出量の進化をモデル化するために
- 新しいシミュレーションアプローチを用いて,ボトムアップとトップダウンによる排出量の見積もりを調整する.
主な方法:
- パイプライン破裂の排出量をシミュレートし,メタンの溶解と海面排出モデルと統合しました.
- 空中,衛星,高塔の測定データと比較して, モデル化された大気排出量を検証した.
主要な成果:
- 大気中に排出されたメタンの量は465 ±20万トンと推定されています.
- モデル化された大気への排出量と上から下への推定量との間の一貫性を達成した.
- このイベントは,最大の単一の一時的な放出であり,2022年の全人類によるメタン排出量の0.1%でした.
結論:
- メタンの排出量を定量化するには,多様で互補的な測定方法が不可欠です.
- この研究は,世界的に他の多くの人為的なメタンの源を緩和することの重要性を強調しています.
- 発見は,排出量定量化方法を改善することによって,グローバルメタンコミットメントのような努力をサポートします.
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