Methane emissions from subglacial meltwater of three alpine glaciers in Yukon, Canada ...
Subglacial meltwater of land-terminating glaciers in Greenland and Iceland are sources of methane (CH 4 ) to the atmosphere, but sparse empirical data exist about the spatial distribution of subglacial CH 4 production and emission from glaciers in other regions of the world. This study presents the...
| Main Authors: | , , , , |
|---|---|
| Format: | Dataset |
| Language: | unknown |
| Published: |
Taylor & Francis
2023
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.6084/m9.figshare.24794179.v1 https://tandf.figshare.com/articles/dataset/Methane_emissions_from_subglacial_meltwater_of_three_alpine_glaciers_in_Yukon_Canada/24794179/1 |
| Summary: | Subglacial meltwater of land-terminating glaciers in Greenland and Iceland are sources of methane (CH 4 ) to the atmosphere, but sparse empirical data exist about the spatial distribution of subglacial CH 4 production and emission from glaciers in other regions of the world. This study presents the first measurements of CH 4 emissions from the subglacial meltwater of three outlet glaciers of the St. Elias Mountains in Yukon, Canada. Dissolved CH 4 concentrations were highly elevated at 45, 135, and 250 times compared to the atmospheric equilibrium concentration in the meltwater of Dusty, Kluane, and Donjek glaciers, respectively. Dissolved CO 2 concentrations were depleted relative to the atmospheric equilibrium. This points to the meltwater being a source of CH 4 and a sink of CO 2 . Stable carbon ( 13 C) and hydrogen ( 2 H) isotopic signatures of the subglacial CH 4 were depleted compared to atmospheric CH 4 at all sites, indicating both biotic and abiotic sources and possible alteration from bacterial CH ... |
|---|