Satellite‐Based Assessment of Methane Emissions From the Darvaza Gas Crater
ダルヴァザガスクレーターからのメタン排出の衛星ベース評価 (AI 翻訳)
Adriana Valverde, Itziar Irakulis‐Loitxate, Javier Gorroño, Zhipeng Pei, Javier Roger, Luis Guanter
🤖 gxceed AI 要約
日本語
本研究は、トルクメニスタンのダルヴァザクレーター（「地獄の門」）からのメタン排出を衛星データで評価。歴史的なLandsat画像で火災開始時期を特定し、ハイパースペクトル衛星で2020～2025年の44プルームを検出。年間数千トンのメタン放出が明らかになり、累計排出量は形成以来90万トン超と推定。火災活動とメタン排出の相関は見られなかった。
English
This study assesses methane emissions from the Darvaza gas crater in Turkmenistan using satellite data. Historical Landsat imagery pinpointed the ignition timing to late 1987/early 1988. Hyperspectral satellites detected 44 plumes from 2020-2025 with emission rates of 1-3 t/h, implying annual emissions of thousands of tonnes. Cumulative emissions since formation are estimated to exceed 900±300 kt. No correlation between flaring intensity and methane release was found.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は天然ガス輸入国であり、上流メタン漏洩はライフサイクル排出に影響。本成果は国際的なメタン排出インベントリ精度向上に寄与し、日本企業のサプライチェーンScope3算定の基礎データとなり得る。
In the global GX context
Methane is a key short-lived climate forcer, and this study provides rare field-validated satellite measurements from a persistent super-emitter site. The methodology supports the Global Methane Pledge and IPCC inventory improvements, relevant for TCFD/ISSB climate risk disclosure and energy company transition planning.
👥 読者別の含意
🔬研究者:Provides long-term satellite data validation for methane emission models and a case study of persistent super-emitter characterization.
🏢実務担当者:Highlights the importance of satellite-based methane monitoring for oil & gas operators to detect and quantify fugitive emissions.
🏛政策担当者:Demonstrates the scale of uncontrolled methane releases from orphan wells and natural seeps, supporting stronger regulatory frameworks.
📄 Abstract（原文）
Abstract Methane is a potent greenhouse gas, and the Darvaza crater in Turkmenistan is a rare, persistent emitter. There are uncertainties regarding its formation date (either 1963 or 1971), fire ignition, and the fire's influence on methane release. Using historical Landsat imagery, we reconstruct the fire history, identifying that combustion began between late 1987 and early 1988. We quantified methane emissions using hyperspectral satellites (EnMAP, PRISMA, EMIT, GF‐5A, and ZY‐1E), detecting 44 plumes between 2020 and 2025, with 1–3 t/h rates. This indicates annual methane emissions of several thousand tonnes, totaling 71 ± 21 kt over 5 years. Extrapolation suggests cumulative emissions exceed 900 ± 300 kt since formation. Additionally, temporal analysis reveals a gradual decline in flaring intensity, although no apparent correlation with methane was identified. This integrated analysis reduces key uncertainties about the crater's origin and contributes to understanding the long‐term natural‐anthropogenic methane emissions and their environmental implications.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1029/2025gl120321first seen 2026-06-13 04:50:07
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