気候変動下における雪氷圏の影響を受けた貯水池からの温室効果ガス排出の最近の増加

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides empirical evidence of increasing GHG emissions from cryosphere-influenced reservoirs, useful for refining global carbon cycle models.

🏢実務担当者:May inform reservoir management and hydropower operators about potential GHG emission liabilities.

🏛政策担当者:Highlights the need to include cryosphere-influenced reservoirs in national GHG reporting and climate policies.

Abstract Global warming leads to cryosphere degradation, transferring large amounts of terrestrial carbon and nitrogen to reservoirs, which may accelerate the release of greenhouse gases (GHGs) to the atmosphere. However, the spatial dynamics and decadal trends of GHG emissions from these reservoirs remain elusive. Here we compile a comprehensive data set of CO2 (1108 measurements), CH4 (661) and N2O (313) concentrations to estimate that cryosphere-influenced reservoirs emit 56.7 ± 9.3 Tg CO2 eq yr–1 of GHGs. Cryosphere-influenced reservoirs account for less than 10% of the global reservoir area, yet they contribute disproportionately high levels of CO2 and N2O emissions. Between 2000 and 2020, total emissions from cryosphere-influenced reservoirs increased significantly by 0.31 ± 0.11 Tg CO2 eq yr–1, which were mainly caused by climate warming and resultant cryosphere melt and thaw. This study highlights that, in contrast to the declining GHG emission trends observed in other reservoirs worldwide with little cryosphere impacts, emissions from cryosphere-influenced reservoirs are on the rise. This represents a growing and critically underappreciated source of anthropogenic GHGs under climate change.

• crossref https://doi.org/10.1021/acs.est.6c08337first seen 2026-08-19 05:52:09 · last seen 2026-08-24 05:48:55