Results 51 to 60 of about 25,642 (273)

Thermal Influence of Volcanic Tephra on Maximum Soil Temperatures: Geoecological Implications for Germination and Distribution of Argyroxiphium sandwicense (Haleakalā, Maui, Hawai’i)

Geographies
Mid-day maximum soil temperatures were measured at 10 study plots during different hot summer days in Haleakalā Crater, Maui, with thermocouple thermometers on five adjacent microsite types: bare surface soils, soils under black tephra, soils under ...
Francisco Luis Pérez
doaj   +1 more source

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

Boreas, 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, Þorsteinn Sæmundsson, Edwin R. C. Baynes, Timothy Beach, Sheryl Luzzadder‐Beach   +4 more
wiley   +1 more source

Impact of supraglacial deposits of tephra from Grímsvötn volcano, Iceland, on glacier ablation

Journal of Glaciology, 2016
Supraglacial deposits are known for their influence on glacier ablation. The magnitude of this influence depends on the thickness and the type of the deposited material.
REBECCA MÖLLER, MARCO MÖLLER, PETER A. KUKLA, CHRISTOPH SCHNEIDER   +3 more
doaj   +1 more source

recent progress in tephra study

Bulletin of the Volcanological Society of Japan, 1986
Significant progresses in recent studies on tephra are reviewed. In relation to volcanological aspects of tephra, recent works on mechanism of vesiculations and disruption of magma, formation of eruption column, transportation of tephra, recognition of types and magnitude on eruptions, and roles of interaction between external water and magma are ...
Endo, Kunihiko, Fukuoka, Takaaki, Miyaji, Naomichi, Sumita, Mari   +3 more
openaire   +2 more sources

Late‐Holocene evolution of a small Sub‐Arctic glacier, Gljúfurárjökull (Tröllaskagi, northern Iceland)

Boreas, EarlyView.
Gljúfurárjökull, located on the Tröllaskagi Peninsula in northern Iceland, is a small glacier approximately 3.8 km in length. This study analyses the glacier's evolution through a combination of methods including: (i) geomorphological mapping, (ii) Cosmic‐Ray Exposure (CRE) dating, (iii) lichenometry and (iv) palaeoglacier reconstruction (volume ...
Nuria Andrés, José M. Fernández‐Fernández, David Palacios, Irene Schimmelpfennig, Leopoldo G. Sancho, Skafti Brynjólfsson, Þorsteinn Sæmundsson, Wesley R. Farnsworth, Luis M. Tanarro, Mariano Brito, Javier Santos‐González, Rosa B. González‐Gutiérrez, ASTER Team, Georges Aumaître, Karim Keddadouche   +14 more
wiley   +1 more source

PlumeTraP: A New MATLAB-Based Algorithm to Detect and Parametrize Volcanic Plumes from Visible-Wavelength Images

Remote Sensing, 2022
Tephra plumes from explosive volcanic eruptions can be hazardous for the lives and livelihoods of people living in the proximity of volcanoes. Monitoring and forecasting tephra plumes play essential roles in the detection, characterization and hazard ...
Riccardo Simionato, Paul A. Jarvis, Eduardo Rossi, Costanza Bonadonna   +3 more
doaj   +1 more source

Sakurajima-Satsuma (Sz-S) and Noike-Yumugi (N-Ym) tephras: new tephrochronological marker beds for the last deglaciation, southern Kyushu, Japan [PDF]

, 2011
Two prominent tephras, Sakurajima-Satsuma (Sz-S) erupted from Sakurajima volcano and Noike-Yumugi (N-Ym) erupted from Kuchierabujima Island, provide new key marker beds for dating and synchronizing palaeoenvironmental and archaeological records in the ...
Ikehara, Minoru, Lowe, David J., Machida, Hiroshi, Moriwaki, Hiroshi, Murata, Masanori, Suzuki, Takehiko   +5 more
core   +2 more sources

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

Boreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida, Jutta Winsemann, Malte Hoffmann, Tobias Lauer, Utz Böhner, Thomas Terberger   +5 more
wiley   +1 more source

Connecting with tephras: principles, functioning, and applications of tephrochronology in Quaternary science [PDF]

, 2013
Tephrochronology is a unique method for linking and dating geological, palaeoecological, palaeoclimatic, or archaeological sequences or events. The method relies firstly on stratigraphy and the law of superposition, which apply in any study that connects
Lowe, David J.
core   +1 more source

Securing the past for the future – why climate proxy archives should be protected

Boreas, EarlyView.
Glaciers, corals, speleothems, peatlands, trees and other natural proxy archives are essential for global climate change research, but their scarcity and fragility are not equally recognised. Here, we introduce a rapidly disappearing source of palaeoclimatic, environmental and archaeological evidence from some 5000 years ago in the Fenland of eastern ...
Tatiana Bebchuk, Ulf Büntgen
wiley   +1 more source