Matches in SemOpenAlex for { <https://semopenalex.org/work/W4253063107> ?p ?o ?g. }
Showing items 1 to 65 of
65
with 100 items per page.
- W4253063107 endingPage "191" @default.
- W4253063107 startingPage "178" @default.
- W4253063107 abstract "Abstract Wire strain meters and seismometers spaced longitudinally along the upper part of Variegated Glacier, Alaska, showed quasi-periodic episodes of increased velocity (mini-surges), which lasted about 1 day and recurred at intervals of a few days to 2 weeks during the early part of the melt seasons of 1979, 1980, and 1981. The zone affected by these mini-surges corresponds to the zone of highest velocity and basal stress increase over the previous decade, and the initiation of the most recent surge in 1982. Mini-surges initiate locally; as a single melt season progresses, the later mini-surges start at higher locations and show a distinct down-glacier propagation of a characteristic strain pattern and associated zone of acoustic emissions at speeds of 0.1–0.6 km h −1 . During mini-surges, extensile and compressive strain-rates exceed 10 × 10 −4 d −1 and 40 × 10 −4 d −1 , respectively; typical strain-rates between mini-surges were less than 2 × 10 −4 d −1 in magnitude. Seismic activity jumped by two orders of magnitude and was distinctly audible during a mini-surge. Maximum strain-rate during mini-surges decreased from year to year. The high time resolution of the strain allows short time-scale structure of velocity variations to be deduced. As a propagating mini-surge passes, the velocity anomaly at a fixed location is characterized by a rapid initial rise over a few hours to two distinct peaks separated by a few hours, followed by a slower return to normal velocity taking up to a day. The double peak in velocity may arise from a single, very sharp, transient peak in the basal slip velocity associated with the initial opening of cavities at the base in response to a sudden rise in basal water pressure (observed by Kamb and Engelhardt). This supports an important role for basal cavitation in the mini-surge mechanism." @default.
- W4253063107 created "2022-05-12" @default.
- W4253063107 creator A5053852346 @default.
- W4253063107 creator A5070251679 @default.
- W4253063107 date "1986-01-01" @default.
- W4253063107 modified "2023-10-14" @default.
- W4253063107 title "Propagating Strain Anomalies during Mini-Surges of Variegated Glacier, Alaska, U.S.A." @default.
- W4253063107 doi "https://doi.org/10.3189/s0022143000015495" @default.
- W4253063107 hasPublicationYear "1986" @default.
- W4253063107 type Work @default.
- W4253063107 citedByCount "2" @default.
- W4253063107 crossrefType "journal-article" @default.
- W4253063107 hasAuthorship W4253063107A5053852346 @default.
- W4253063107 hasAuthorship W4253063107A5070251679 @default.
- W4253063107 hasBestOaLocation W42530631071 @default.
- W4253063107 hasConcept C100834320 @default.
- W4253063107 hasConcept C105702510 @default.
- W4253063107 hasConcept C114793014 @default.
- W4253063107 hasConcept C119217923 @default.
- W4253063107 hasConcept C121332964 @default.
- W4253063107 hasConcept C126691448 @default.
- W4253063107 hasConcept C127313418 @default.
- W4253063107 hasConcept C1276947 @default.
- W4253063107 hasConcept C13280743 @default.
- W4253063107 hasConcept C149342994 @default.
- W4253063107 hasConcept C154108245 @default.
- W4253063107 hasConcept C165205528 @default.
- W4253063107 hasConcept C2778022156 @default.
- W4253063107 hasConcept C71924100 @default.
- W4253063107 hasConcept C97355855 @default.
- W4253063107 hasConceptScore W4253063107C100834320 @default.
- W4253063107 hasConceptScore W4253063107C105702510 @default.
- W4253063107 hasConceptScore W4253063107C114793014 @default.
- W4253063107 hasConceptScore W4253063107C119217923 @default.
- W4253063107 hasConceptScore W4253063107C121332964 @default.
- W4253063107 hasConceptScore W4253063107C126691448 @default.
- W4253063107 hasConceptScore W4253063107C127313418 @default.
- W4253063107 hasConceptScore W4253063107C1276947 @default.
- W4253063107 hasConceptScore W4253063107C13280743 @default.
- W4253063107 hasConceptScore W4253063107C149342994 @default.
- W4253063107 hasConceptScore W4253063107C154108245 @default.
- W4253063107 hasConceptScore W4253063107C165205528 @default.
- W4253063107 hasConceptScore W4253063107C2778022156 @default.
- W4253063107 hasConceptScore W4253063107C71924100 @default.
- W4253063107 hasConceptScore W4253063107C97355855 @default.
- W4253063107 hasIssue "111" @default.
- W4253063107 hasLocation W42530631071 @default.
- W4253063107 hasOpenAccess W4253063107 @default.
- W4253063107 hasPrimaryLocation W42530631071 @default.
- W4253063107 hasRelatedWork W103228039 @default.
- W4253063107 hasRelatedWork W30529489 @default.
- W4253063107 hasRelatedWork W32085391 @default.
- W4253063107 hasRelatedWork W41372630 @default.
- W4253063107 hasRelatedWork W48360905 @default.
- W4253063107 hasRelatedWork W69463568 @default.
- W4253063107 hasRelatedWork W77751872 @default.
- W4253063107 hasRelatedWork W90754164 @default.
- W4253063107 hasRelatedWork W92669891 @default.
- W4253063107 hasRelatedWork W98692450 @default.
- W4253063107 hasVolume "32" @default.
- W4253063107 isParatext "false" @default.
- W4253063107 isRetracted "false" @default.
- W4253063107 workType "article" @default.