Results 81 to 90 of about 1,251 (191)

The importance of grain size and shape in controlling the dispersion of the Vedde cryptotephra [PDF]

Journal of Quaternary Science, 2019
AbstractVolcanic ash is dispersed in the atmosphere according to meteorology and particle properties, including size and shape. However, the multiple definitions of size and shape for non‐spherical particles affect our ability to use physical particle properties to understand tephra transport.
Jennifer Saxby, Alison Rust, Katharine Cashman, Frances Beckett   +3 more
openaire   +3 more sources

Increasing Tephra Deposition in Northeastern North America Points to Atmospheric Circulation Changes at the Early Mid Holocene Transition

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 1, 16 January 2025.
Abstract The number of cryptotephra (non‐visible volcanic ash) records from northeastern North America is unique in the continent. The resulting tephrostratigraphic framework includes ash deposits sourced from volcanic arcs across the Northern Hemisphere and is an exceptional resource for correlating and dating paleoenvironmental records.
A. J. Monteath, B. J. L. Jensen, L. J. Davies, M. S. M. Bolton, P. D. M. Hughes, H. Mackay, M. E. Edwards, M. Finkenbinder, R. K. Booth, L. C. Cwynar, J. Harvey, S. Pyne‐O’Donnell, C. N. Papp, D. G. Froese, G. Mallon, M. J. Amesbury, R. J. Mayfield   +16 more
wiley   +1 more source

Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200-80ka

, 2015
Core PRAD 1-2, located on the western flank of the Mid-Adriatic Deep, was investigated for tephra content within the part of the sequence assigned on biostratigraphic and sapropel-layer stratigraphy to MIS 5 and 6 (ca. 80–200 ka BP).
Albert, Paul, Asioli, Alessandra, Blockley, Simon, Bourne, Anna, Keller, Jorg, Lowe, John, Matthews, Ian, Trincardi, Fabio, Wulf, Sabine   +8 more
core   +1 more source

Impact of small-scale vegetation structure on tephra layer preservation. [PDF]

, 2016
The factors that influence tephra layer taphonomy are poorly understood, but vegetation cover is likely to play a role in the preservation of terrestrial tephra deposits.
Cutler, Nick A, Dugmore, Andrew J, Shears, Olivia M, Streeter, Richard T   +3 more
core   +3 more sources

Using Simulated Radiances to Understand the Limitations of Satellite‐Retrieved Volcanic Ash Data and the Implications for Volcanic Ash Cloud Forecasting

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 23, 16 December 2024.
Abstract Volcanic Ash Advisory Centers (VAACs) have generated volcanic ash forecasts for the aviation industry since the mid‐1990s. The excellent spatial and temporal coverage of satellite data makes them critical to the validation of ash dispersion model forecasts.
C. Saint, F. M. Beckett, F. Dioguardi, N. Kristiansen, R. N. Tubbs   +4 more
wiley   +1 more source

Stop 2 Kainui silt loam and Naike clay, Gordonton Rd [PDF]

, 2008
At this stop are several remarkable features both stratigraphic and pedological, and a “two-storied” soil, the Kainui silt loam alongside (in just a few places) the Naike clay. Both soils are Ultisols. The sequence of tephra beds and buried soil horizons
Lowe, David J.
core   +3 more sources

Advancing chronologies for Last Interglacial sequences

Journal of Quaternary Science, Volume 39, Issue 7, Page 987-1010, October 2024.
ABSTRACT Studies of the Last Interglacial (ca. 129 to 116 ka BP) provide an opportunity to study the impact of high‐latitude warm temperatures on the Earth system. To build an accurate spatio‐temporal picture of climate and environmental variability during the Last Interglacial, building robust chronologies, through which the patchwork of terrestrial ...
AMY M. MCGUIRE, IRENE M. WAAJEN, NATASHA L.M. BARLOW   +2 more
wiley   +1 more source

High‐Resolution Ice‐Core Analyses Identify the Eldgjá Eruption and a Cluster of Icelandic and Trans‐Continental Tephras Between 936 and 943 CE

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 16, 28 August 2024.
Abstract The Eldgjá eruption is the largest basalt lava flood of the Common Era. It has been linked to a major ice‐core sulfur (S) spike in 939–940 CE and Northern Hemisphere summer cooling in 940 CE. Despite its magnitude and potential climate impacts, uncertainties remain concerning the eruption timeline, atmospheric dispersal of emitted volatiles ...
William Hutchison, Imogen Gabriel, Gill Plunkett, Andrea Burke, Patrick Sugden, Helen Innes, Siwan Davies, William M. Moreland, Kirstin Krüger, Rob Wilson, Bo M. Vinther, Dorthe Dahl‐Jensen, Johannes Freitag, Clive Oppenheimer, Nathan J. Chellman, Michael Sigl, Joseph R. McConnell   +16 more
wiley   +1 more source

Decadal-to-centennial increases of volcanic aerosols from Iceland challenge the concept of a Medieval Quiet Period

Communications Earth & Environment
Existing global volcanic radiative aerosol forcing estimates portray the period 700 to 1000 as volcanically quiescent, void of major volcanic eruptions.
Imogen Gabriel, Gill Plunkett, Peter M. Abbott, Melanie Behrens, Andrea Burke, Nathan Chellman, Eliza Cook, Dominik Fleitmann, Maria Hörhold, William Hutchison, Joseph R. McConnell, Bergrún A. Óladóttir, Johannes Preiser-Kapeller, Jakub T. Sliwinski, Patrick Sugden, Birthe Twarloh, Michael Sigl   +16 more
doaj   +1 more source

Origin of the 1458/59 CE volcanic eruption revealed through analysis of glass shards in the firn core from Antarctic Vostok station

Communications Earth & Environment
The 1458/59 CE volcanic event, among the largest in the last millennium, is primarily attributed to the Kuwae volcano in Vanuatu. However, a recent study suggests the Reclus volcano in southern Patagonia, Chile, as an alternative source.
Seokhyun Ro, Soon Do Hur, Alexey Ekaykin, Yeongcheol Han, Chul-Un Ro, Sang-Bum Hong, Mi Jung Lee, Chaewon Chang, Seungmi Lee, Jangil Moon, Hyejin Jung, Arina Veres, Ahhyung Lee, Sungmin Hong   +13 more
doaj   +1 more source