气候变化领域集成服务门户(CCPortal): Large-scale thermal unrest of volcanoes for years prior to eruption

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DOI	10.1038/s41561-021-00705-4
	Large-scale thermal unrest of volcanoes for years prior to eruption
	Girona T.; Realmuto V.; Lundgren P.
发表日期	2021
ISSN	17520894
起始页码	238
结束页码	241
卷号	14 期号:4
英文摘要	Identifying the observables that warn of volcanic eruptions is a major challenge in natural hazard management. A potentially important observable is the release of heat through volcano surfaces, which represents a major energy source at quiescent volcanoes. However, it remains unclear whether surface heat emissions respond to pre-eruptive processes and vary before eruption. Here we show through a statistical analysis of satellite-based long-wavelength (10.780–11.280 μm) infrared data that the last magmatic and phreatic eruptions of five different volcanoes were preceded by subtle but significant long-term (years), large-scale (tens of square kilometres) increases in their radiant heat flux (up to ~1 °C in median radiant temperature). Large-scale thermal unrest is detected even before eruptions that were not anticipated from other volcano monitoring methods, such as the 2014 phreatic eruption of Ontake (Japan) and the 2015 magmatic eruption of Calbuco (Chile). We attribute large-scale thermal unrest to the enhancement of underground hydrothermal activity, and suggest that such analysis of satellite-based infrared observations can improve constraints on the thermal budget of volcanoes, early detection of pre-eruptive conditions and assessments of volcanic alert levels. © 2021, The Author(s), under exclusive licence to Springer Nature Limited part of Springer Nature.
英文关键词	assessment method; hazard management; heat flux; hydrothermal system; natural hazard; observational method; satellite data; statistical analysis; volcanic eruption; volcano; Chile; Chubu; Honshu; Japan; Ontake
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206895
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Girona T.,Realmuto V.,Lundgren P.. Large-scale thermal unrest of volcanoes for years prior to eruption[J],2021,14(4).
APA	Girona T.,Realmuto V.,&Lundgren P..(2021).Large-scale thermal unrest of volcanoes for years prior to eruption.Nature Geoscience,14(4).
MLA	Girona T.,et al."Large-scale thermal unrest of volcanoes for years prior to eruption".Nature Geoscience 14.4(2021).