Results 81 to 90 of about 83,723 (314)

SO2 emissions from basaltic eruptions, and the excess sulfur issue [PDF]

open access: yes, 2004
Volcanic SO2 can affect the Earth's environment. Where no direct measurements of SO2 in the atmosphere are available, a petrologic method of assessing sulfur release from the magma must be used.
Blake, S.   +3 more
core   +1 more source

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

open access: yesBoreas, EarlyView.
Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells   +4 more
wiley   +1 more source

Ice core evidence for a second volcanic eruption around 1809 in the Northern Hemisphere [PDF]

open access: yes, 2006
A volcanic signal observed in ice cores from both polar regions six years prior to Tambora is attributed to an unknown tropical eruption in 1809. Recovery of dacitic tephra from the 1809 horizon in a Yukon ice core (Eclipse) that is chemically distinct ...
Germani, Mark S   +4 more
core   +3 more sources

FAM20A Deficiency Drives Transcriptomic Dysregulation and Functional Impairment in Gingival Fibroblasts

open access: yesCell Proliferation, EarlyView.
FAM20A variants cause AI1G, marked by enamel defects, gingival overgrowth and ectopic calcifications. RNA sequencing of patient‐derived gingival fibroblasts showed dysregulated genes in adhesion, proliferation and signalling pathways. Functional assays revealed increased cell proliferation, impaired ECM interactions and osteogenesis, suggesting FAM20A ...
Kanokwan Sriwattanapong   +9 more
wiley   +1 more source

Humidity dependence of AE activity in sheared quartz gouges and its implication for the micromechanics of friction

open access: yesEarth, Planets and Space
The micromechanics of friction has been investigated from the viewpoint of the healing of real contacts. In this study, the underlying processes of friction are discussed from the viewpoint of the contact junction deformation and failure by measuring the
Yasuo Yabe
doaj   +1 more source

Climatic impact of the A.D. 1783 Asama (Japan) Eruption was minimal: Evidence from the GISP2 Ice Core [PDF]

open access: yes, 1994
Assessing the climatic impact of the A.D. 1783 eruption of Mt. Asama, Japan, is complicated by the concurrent eruption of Laki, Iceland. Estimates of the stratospheric loading of H2SO4 for the A.D.
Endo, K.   +8 more
core   +2 more sources

Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]

open access: yes, 2015
We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note—we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Palladino, Danilo Mauro   +3 more
core   +1 more source

Initial atmospheric conditions control transport of volcanic volatiles, forcing and impacts [PDF]

open access: yesAtmospheric Chemistry and Physics
Volcanic eruptions impact the climate and environment. The volcanic forcing is determined by eruption source parameters, including the mass and composition of volcanic volatiles, eruption season, eruption latitude, and injection altitude.
Z. Zhuo   +3 more
doaj   +1 more source

Sulfur mass loading of the atmosphere from volcanic eruptions: Calibration of the ice core record on basis of sulfate aerosol deposition in polar regions from the 1982 El Chichon eruption [PDF]

open access: yes
Major volcanic eruptions disperse large quantities of sulfur compound throughout the Earth's atmosphere. The sulfuric acid aerosols resulting from such eruptions are scavenged by snow within the polar regions and appear in polar ice cores as elevated ...
Laj, Paolo, Sigurdsson, Haraldur
core   +1 more source

Arsenic-bearing phases in South Andean volcanic ashes: Implications for As mobility in aquatic environments [PDF]

open access: yes, 2015
Three samples of volcanic ashes collected after eruptions of the volcanos Hudson in 1991, Chaitén in 2008 and Puyehue in 2011 were analyzed in order to define the solid speciation of arsenic and the dynamics of its release to the aqueous phase.
Bia, Gonzalo Luis   +3 more
core   +1 more source

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