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First observation of direct methane emission to the atmosphere from the subglacial domain of the Greenland Ice Sheet
During a 2016 field expedition to the West Greenland Ice Sheet, a striking observation of significantly elevated CH(4) concentrations of up to 15 times the background atmospheric concentration were measured directly in the air expelled with meltwater at a subglacial discharge point from the Greenlan...
| Autores principales: | , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Nature Publishing Group UK
2018
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6226494/ https://www.ncbi.nlm.nih.gov/pubmed/30413774 http://dx.doi.org/10.1038/s41598-018-35054-7 |
| Sumario: | During a 2016 field expedition to the West Greenland Ice Sheet, a striking observation of significantly elevated CH(4) concentrations of up to 15 times the background atmospheric concentration were measured directly in the air expelled with meltwater at a subglacial discharge point from the Greenland Ice Sheet. The range of hourly subglacial CH(4) flux rate through the discharge point was estimated to be 3.1 to 134 g CH(4) hr(−1). These measurements are the first observations of direct emissions of CH(4) from the subglacial environment under the Greenlandic Ice Sheet to the atmosphere and indicate a novel emission pathway of CH(4) that is currently a non-quantified component of the Arctic CH(4) budget. |
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