Results 71 to 80 of about 25,642 (273)

Large‐Scale Topographic Changes at Erupting Volcanoes Measured by the TanDEM‐X Digital Change Map

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract Volcanic eruptions cause large‐scale topographic changes, through the emplacement of lava flows and lava domes, the formation of craters and calderas, and thick ash and pyroclastic deposits. Here we analyze the TanDEM‐X Digital Change Map (DCM), which compares the DEM produced during 2010–2015 with satellite acquisitions collected in 2016–2022.
Rebecca Edwards, Juliet Biggs
wiley   +1 more source

Maturation of Silicate Weathering Pathways Revealed by Germanium‐Silicon Ratios

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract We document the evolution of fresh basalt subject to roughly a decade of chemical weathering through systematic temporal shifts in aqueous germanium‐silicon ratios (Ge/Si) in a unique set of meso‐scale artificial hillslopes. Elevated dissolved Ge/Si signatures relative to bedrock in this young system are associated with formation of high‐Si ...
Andrew Guertin, Charlie Cunningham, Julien Bouchez, Marine Gelin, Jon Chorover, Louis A. Derry, Jennifer L. Druhan   +6 more
wiley   +1 more source

Estimation of Supraglacial Dust and Debris Geochemical Composition via Satellite Reflectance and Emissivity

Remote Sensing, 2012
We demonstrate spectral estimation of supraglacial dust, debris, ash and tephra geochemical composition from glaciers and ice fields in Iceland, Nepal, New Zealand and Switzerland.
Kimberly Casey, Andreas Kääb
doaj   +1 more source

Tephra hazard assessment at Mt. Etna (Italy) [PDF]

Natural Hazards and Earth System Sciences, 2013
Abstract. In this paper we present a probabilistic hazard assessment for tephra fallout at Mt. Etna (Italy) associated with both short- and long-lived eruptions. We analyzed wind data from the atmospheric soundings of the Italian Air Force at Trapani Birgi (western Sicily), and use the TEPHRA advection-diffusion-sedimentation model to capture the ...
Scollo, S., Coltelli, M., Bonadonna, Costanza, Del Carlo, P.   +3 more
openaire   +5 more sources

Unravelling upbuilding pedogenesis in tephra and loess sequences in New Zealand using tephrochronology [PDF]

, 2010
The genesis of soils developed in either tephra or loess on stable sites differs markedly from that of soils developed on rock because classical topdown processes operate in conjuction with geological processes whereby material is added to the land ...
Lowe, David J., Tonkin, Philip J.
core   +1 more source

Short-range-order minerals and dominant accessory properties controlling P sorption in tropical tephra soils of the Cameroon volcanic line [PDF]

, 2019
A
Enang, Roger Kogge, Kome, Georges Kogge, Van Ranst, Eric, Yerima, Bernard Palmer Kfuban   +3 more
core   +2 more sources

Seismic Evidence for Widespread Active Magmatism in Eastern Marie Byrd Land, Antarctica

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Marie Byrd Land is a volcanically active province that overlaps with the Amundsen Sea Embayment, a region of the West Antarctic Ice Sheet that is experiencing particularly rapid ice mass loss. We locate 34 previously undetected seismic events (ML 1.2–3.2) and identify 251 additional similar events from 2019 to 2024 in eastern Marie Byrd Land ...
Erica M. Lucas, Andrew A. Nyblade, Douglas A. Wiens, Richard C. Aster, Terry J. Wilson   +4 more
wiley   +1 more source

Relation between Central European Climate Change and Eifel Volcanism during the Last 130,000 Years: The ELSA-23-Tephra-Stack

Quaternary
The analysis of tephra layers in maar lake sediments of the Eifel shows 14 well-visible tephra during the last glacial cycle from the Holocene to the Eemian (0–130,000 yr b2k).
Frank Sirocko, Frederik Krebsbach, Johannes Albert, Sarah Britzius, Fiona Schenk, Michael W. Förster   +5 more
doaj   +1 more source

The interpretative value of transformed tephra sequences [PDF]

Journal of Quaternary Science, 2019
ABSTRACTWe explore developments in tephra science that consider more than chronology, using case studies of morphological transformations of tephra deposits. Volcanic processes and prevailing weather conditions determine the distribution of tephra deposits immediately after an eruption, but as these freshly fallen tephra become part of the ...
Andrew J. Dugmore, Polly I. J. Thompson, Richard T. Streeter, Nick A. Cutler, Anthony J. Newton, Martin P. Kirkbride   +5 more
openaire   +5 more sources

Once despised now desired: innovative land use and management of multilayered Pumice Soils in the Taupo and Galatea areas, central North Island, New Zealand [PDF]

, 2014
The tour brings together innovative land use change and management associated with dairy farming, and land-based effluent disposal, on weakly weathered and multi-layered, glass-rich, Pumice Soils (Vitrands) in the Taupo and Galatea areas.
Balks, Megan R., Laubscher, Nadia, Lowe, David J.   +2 more
core   +1 more source