Matches in SemOpenAlex for { <https://semopenalex.org/work/W3094530963> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W3094530963 abstract "<p>Subglacial hydrology strongly modulates glacier basal sliding, and thus likely exerts a major control on ice loss and sea-level rise. However, the limited direct and spatialized observations of the subglacial drainage system make difficult to assess the physical processes involved in its development. Recent work shows that detectable seismic noise is generated by subglacial water flow, such that seismic noise analysis may be used to retrieve the physical properties of subglacial channelized water flow. Yet, investigating the spatial organisation of the drainage system (e.g. channels numbers and positions) together with its evolving properties (e.g. pressure conditions) through seismic observations remains to be done. The objective of this study is to bring new insights on the subglacial hydrology spatio-temporal dynamics using dense array seismic observations.</p><p>We use 1-month long ground motion records at a hundred of sensors deployed on the Argenti&#232;re Glacier (French Alps) during the onset of the melt season, when the subglacial drainage system is expected to strongly evolve in response to the rapidly increasing water input. We conduct a multi-method approach based on the analysis of both amplitude and phase maps of seismic signals. We observe characteristic spatial patterns, consistent across those independent approaches, which we attribute to the underlying subglacial drainage system.</p><p>The phase-driven approach shows seismic noise sources that focuses in the along-flow direction as the water input increases. We identify this evolution as the development of the main subglacial channel whose position is coherent with the one expected from hydraulic potential calculations. During periods of rapid changes in water input (5 days over 31) and concomitant glacier acceleration the amplitude-driven approach shows spatial pattern highly consistent with the seismic noise sources location. At this time, we suggest that the spatial variations in the amplitude are representative of the water pressure conditions in subglacial channels and surrounding areas. Our spatialized observations therefore reveal the spatio-temporal evolution of the subglacial drainage system together with its changing pressure conditions. We observe, for instance, that channels develop at the very onset of the melt-season and rapidly capture the water from surrounding areas. Such unique observations may allow to better constrain the physics of subglacial water flow and therefore strengthen our knowledge on the dynamics of subglacial environments.</p>" @default.
- W3094530963 created "2020-10-29" @default.
- W3094530963 creator A5002186840 @default.
- W3094530963 creator A5048096000 @default.
- W3094530963 creator A5066809808 @default.
- W3094530963 creator A5082353711 @default.
- W3094530963 date "2020-03-23" @default.
- W3094530963 modified "2023-09-27" @default.
- W3094530963 title "Investigating Spatio-temporal Changes in Subglacial Hydrology from Dense Array Seismology." @default.
- W3094530963 doi "https://doi.org/10.5194/egusphere-egu2020-10710" @default.
- W3094530963 hasPublicationYear "2020" @default.
- W3094530963 type Work @default.
- W3094530963 sameAs 3094530963 @default.
- W3094530963 citedByCount "0" @default.
- W3094530963 crossrefType "posted-content" @default.
- W3094530963 hasAuthorship W3094530963A5002186840 @default.
- W3094530963 hasAuthorship W3094530963A5048096000 @default.
- W3094530963 hasAuthorship W3094530963A5066809808 @default.
- W3094530963 hasAuthorship W3094530963A5082353711 @default.
- W3094530963 hasConcept C100834320 @default.
- W3094530963 hasConcept C105795698 @default.
- W3094530963 hasConcept C114793014 @default.
- W3094530963 hasConcept C115961682 @default.
- W3094530963 hasConcept C121332964 @default.
- W3094530963 hasConcept C127313418 @default.
- W3094530963 hasConcept C154945302 @default.
- W3094530963 hasConcept C180205008 @default.
- W3094530963 hasConcept C187320778 @default.
- W3094530963 hasConcept C18903297 @default.
- W3094530963 hasConcept C33923547 @default.
- W3094530963 hasConcept C41008148 @default.
- W3094530963 hasConcept C51889082 @default.
- W3094530963 hasConcept C62520636 @default.
- W3094530963 hasConcept C67592535 @default.
- W3094530963 hasConcept C76155785 @default.
- W3094530963 hasConcept C76886044 @default.
- W3094530963 hasConcept C86803240 @default.
- W3094530963 hasConcept C94747663 @default.
- W3094530963 hasConcept C99498987 @default.
- W3094530963 hasConceptScore W3094530963C100834320 @default.
- W3094530963 hasConceptScore W3094530963C105795698 @default.
- W3094530963 hasConceptScore W3094530963C114793014 @default.
- W3094530963 hasConceptScore W3094530963C115961682 @default.
- W3094530963 hasConceptScore W3094530963C121332964 @default.
- W3094530963 hasConceptScore W3094530963C127313418 @default.
- W3094530963 hasConceptScore W3094530963C154945302 @default.
- W3094530963 hasConceptScore W3094530963C180205008 @default.
- W3094530963 hasConceptScore W3094530963C187320778 @default.
- W3094530963 hasConceptScore W3094530963C18903297 @default.
- W3094530963 hasConceptScore W3094530963C33923547 @default.
- W3094530963 hasConceptScore W3094530963C41008148 @default.
- W3094530963 hasConceptScore W3094530963C51889082 @default.
- W3094530963 hasConceptScore W3094530963C62520636 @default.
- W3094530963 hasConceptScore W3094530963C67592535 @default.
- W3094530963 hasConceptScore W3094530963C76155785 @default.
- W3094530963 hasConceptScore W3094530963C76886044 @default.
- W3094530963 hasConceptScore W3094530963C86803240 @default.
- W3094530963 hasConceptScore W3094530963C94747663 @default.
- W3094530963 hasConceptScore W3094530963C99498987 @default.
- W3094530963 hasLocation W30945309631 @default.
- W3094530963 hasOpenAccess W3094530963 @default.
- W3094530963 hasPrimaryLocation W30945309631 @default.
- W3094530963 hasRelatedWork W14700573 @default.
- W3094530963 hasRelatedWork W18386614 @default.
- W3094530963 hasRelatedWork W18465975 @default.
- W3094530963 hasRelatedWork W34069975 @default.
- W3094530963 hasRelatedWork W40108546 @default.
- W3094530963 hasRelatedWork W42559810 @default.
- W3094530963 hasRelatedWork W48302863 @default.
- W3094530963 hasRelatedWork W7133467 @default.
- W3094530963 hasRelatedWork W72449269 @default.
- W3094530963 hasRelatedWork W78651844 @default.
- W3094530963 isParatext "false" @default.
- W3094530963 isRetracted "false" @default.
- W3094530963 magId "3094530963" @default.
- W3094530963 workType "article" @default.