A5087604351- Cryospheric studies and observations
- Polar Research and Ecology
- Winter Sports Injuries and Performance
- Methane Hydrates and Related Phenomena
- Mercury impact and mitigation studies
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Diatoms and Algae Research
- Climate change and permafrost
Charles University
2023-2024
Abstract Subglacial environments provide conditions suitable for the microbial production of methane, an important greenhouse gas, which can be released from beneath ice as a result glacial melting. High gaseous methane emissions have recently been discovered at Russell Glacier, outlet southwestern margin Greenland Ice Sheet, acting not only potential climate amplifier but also substrate consuming microorganisms. Here, we describe composition assemblage exported in meltwater release hotspot...
The basal environments of ice sheets play an important role as places methane (CH4) production, storage, and release. Recent investigations have confirmed the release subglacial microbial origin at western margin Greenland Ice Sheet (GrIS). This may then serve a substrate for methane-consuming microorganisms thus significantly shape community assembly in GrIS environments. We conducted comparative analysis composition exported assemblages from six regions spanning 2,000-km transect along...
Recent studies have shown the release of methane (CH4) from melting Greenland Ice Sheet (GrIS) and identified it as having an additional potential positive climate feedback. This originates mainly acetoclastic methanogenesis in subglacial sediments, accumulates over time, subsequently diffuses into hydrologic network which transports to ice sheet margin. The rates production emission GrIS sediments likely depend on a number factors, including sediment depth distribution, organic matter...
Abstract. The microbial ecosystems that lie beneath ice sheets can impact and contribute to global biogeochemical cycles, yet remain poorly understood given the logistical challenges in directly accessing subglacial environment. Studies instead often rely on indirect sampling of systems via collection meltwaters emerging from margins. However, origin exported material these waters will change over a melt season as glacier hydrology responds changes surface melt. Here, we reveal trends...