Results 61 to 70 of about 18,565 (272)

The density, construction and drag coefficient of electrostatic volcanic ash aggregates. [PDF]

, 2003
Recent laboratory experiments have demonstrated that electrostatic charges generated during the fragmentation of volcanic pumice cause rapid aggregation of the silicate particles produced.
Lane, Steve J., Gilbert, Jennie S., S. J. Lane, James, Mike R., M. R. James, J. S. Gilbert   +5 more
core  

Underground Lag: Fungal Community and Edaphic Legacies After Disturbance

Land Degradation &Development, EarlyView.
ABSTRACT Páramos are neotropical mountain ecosystems that regulate water and store large amounts of carbon, but are increasingly degraded by agriculture and grazing. Although native vegetation often recolonizes after abandonment, belowground recovery remains poorly understood.
Wilmer Dajhan Navarrete‐López, Arantzazu Molins, María Elena Solarte, Camila Enriquez‐Paz, Joshua Borràs, Josefina Bota, Elena Baraza   +6 more
wiley   +1 more source

Calcium carbide residue modification of natural volcanic ash: Strength enhancement mechanisms and life cycle assessment

Case Studies in Construction Materials
In volcanic regions, volcanic ash cannot be directly used as an engineering material in construction, which necessitates stabilization. This study proposes a method for stabilizing volcanic ash using calcium carbide residue.
Mingmin Zhang, Changming Wang, Hailiang Liu, Di Wu, Baohong Lv   +4 more
doaj   +1 more source

Additions to the Acanthaceae of the Flora of Tropical East Africa: two new species from northern Kenya

Nordic Journal of Botany, EarlyView.
The new species Barleria kulalensis I.Darbysh. & Q.Luke and Dicliptera huriensis I.Darbysh. & Q.Luke are described and illustrated and their extinction risk is assessed provisionally. The former is based on Barleria sp. G of the Flora of Tropical East Africa (FTEA), with recent field observation and collection of this species from the foothills of ...
Iain Darbyshire, Quentin Luke
wiley   +1 more source

Geoarchaeological tsunami deposits at Palaikastro (Crete) and the Late Minoan IA eruption of Santorini [PDF]

, 2008
The explosive eruption at Santorini in the Aegean Sea during the second millennium BCE was the largest Holocene volcanic upheaval in the Eastern Mediterranean region.
Bruins, Hendrik J.,, Synolakis, Costas E.,, Kleugel, Andreas, Kisch, Hanan J., van der Plicht, Johannes, Plicht, Johannes van der, Keller, Jörg, Synolakis, Costas E., Bruins, Hendrik J., Benjamini, Chaim, Kisch, Hanan J.,, MacGillivray, J. Alexander,, MacGillivray, Jeff Alexander, Keller, Joerg, Keller, Jörg,, Klügel, Andreas, Benjamini, Chaim,, MacGillivray, J. Alexander, Klügel, Andreas,, Plicht, Johannes van der,   +19 more
core   +1 more source

Not all Temperature Shocks are Alike: Disentangling Heat and High Temperature Shocks and Their Effects on Inflation in Australia

Economic Record, EarlyView.
We study the effects of heat and high temperature shocks on inflation in Australia using monthly, state‐level temperature anomaly data via two stages. In the first stage, we decompose temperature anomalies into orthogonal components using a structural vector autoregression with long‐run restrictions.
Tan Dat Huynh, Mengheng Li
wiley   +1 more source

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

Integrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu, Qian‐Nan Zhang, Dang‐Peng Xi   +2 more
wiley   +1 more source

Temporal change in rock-magnetic properties of volcanic ashes ejected during a 1-year eruption event: a case study on the Aso Nakadake 2019–2020 eruption

Earth, Planets and Space, 2023
We investigated temporal changes in the rock-magnetic properties of volcanic ash ejected from the Aso Nakadake volcano during a sequence of ash eruptions from 2019 to 2020. For 39 volcanic ash samples, magnetic hysteresis parameters, including saturation
Chisato Anai, Takahiro Ohkura, Shin Yoshikawa, Nobutatsu Mochizuki   +3 more
doaj   +1 more source

Stratigraphy, age, composition, and correlation of late Quaternary tephras interbedded with organic sediments in Waikato lakes, North Island, New Zealand

, 1988
Cores from 14 peaty lakes in the central Waikato region, northern North Island, contain a sequence of 41 well-preserved, mainly macroscopic, occasionally bedded, ash and lapilli layers ranging in thickness from c.
Lowe, David J.
core   +1 more source

Charge structure in volcanic plumes: a comparison of plume properties predicted by an integral plume model to observations of volcanic lightning during the 2010 eruption of Eyjafjallajökull, Iceland [PDF]

, 2014
Observations of volcanic lightning made using a lightning mapping array during the 2010 eruption of Eyjafjallajökull allow the trajectory and growth of the volcanic plume to be determined.
Sonja A. Behnke, Woodhouse, Mark J., Mark J. Woodhouse, Behnke, Sonja A.   +3 more
core   +1 more source