Results 121 to 130 of about 14,168 (295)

Surface electrical properties experiment. Part 2: Theory of radio-frequency interferometry in geophysical subsurface probing [PDF]

The radiation fields due to a horizontal electric dipole laid on the surface of a stratified medium were calculated using a geometrical optics approximation, a modal approach, and direct numerical integration.
Kong, J. A., Tsang, L.
core   +1 more source

Diversity of Lecidea (Lecideaceae, Ascomycota) species revealed by molecular data and morphological characters [PDF]

, 2002
The diversity of lichens, especially crustose species, in continental Antarctica is still poorly known. To overcome difficulties with the morphology based species delimitations in these groups, we employed molecular data (nuclear ITS and mitochondrial ...
Branson, K, Chakrabarti, Suparno, Chakraverty, Ronjon, Chopra, Ravinder, Craddock, Charles, Gale, G, Geary, J, Goldstone, AH, Hunter, A, Kottaridis, PD, Linch, DC, Mackinnon, S, Mahendra, Premini, Milligan, Donald, Parker, Alan, Peggs, K, Thuraisundaram, D, Verfueth, S, Waldmann, H, Williams, CD, Yong, K   +20 more
core   +2 more sources

A Geophysical Investigation of a Rock Glacier in the Canadian Rockies

, 2016
In this project a geophysical survey was conducted on the rock glacier in the Helen Lake watershed (Ban National Park, Alberta, Canada) to investigate its internal structure. Geophysical methods involved electrical resistivity tomography, seismic refraction and ground penetrating radar.
openaire   +2 more sources

Application of Multi‐Method Dating for Understanding the Gravettian North of Moravia, Central Europe

Archaeometry, EarlyView.
ABSTRACT This article presents the results of integrating three methods to assess the age of the Upper Palaeolithic site of Pietraszyn 11 (SW Poland), close to the Moravian Gate. Sediment chronology determined using optically stimulated luminescence produced promising, yet ambiguous results (51.0 ± 3.7 to 20.3 ± 0.7 ka).
A. Wiśniewski, B. Bujalska, D. Popović, M. Baca, K. Zarzecka‐Szubińska, A. Lemanik, M. Hein, S. Talamo, P. Moska, H. Fewlass, D. Tokarz, Z. Jary, B. Przybylski, D. Bobak, M. Połtowicz‐Bobak, K. Wertz, A. Nadachowski   +16 more
wiley   +1 more source

Identifying Spatial Variability in Greenland's Outlet Glacier Response to Ocean Heat

Frontiers in Earth Science, 2018
Although the Greenland ice sheet is losing mass as a whole, patterns of change on both local and regional scales are complex. Spatial statistics reveal large spatial variability of dynamic thinning rates of Greenland's marine-terminating glaciers between
David F. Porter, Kirsty J. Tinto, Alexandra L. Boghosian, Beata M. Csatho, Robin E. Bell, James R. Cochran   +5 more
doaj   +1 more source

Discussion of “clustering on dissimilarity Representations for detecting mislabelled Seismic signals at Nevado del Ruiz Volcano” by Mauricio Orozco-Alzate, and César Germán Castellanos-Domínguez [PDF]

, 2008
The authors are to be congratulated for a systematic investigationof the accurate and non subjective classifying approach in seismic research. The authors have conducted several clustering algorithms to the seismic event records from Volcanological and ...
Demirel, Mehmet C., Kahya, Ercan, Rivera, Diego   +2 more
core   +1 more source

Helheim 2006: Integrated Geophysical Observations of Glacier Flow

, 2006
During the summer field season, 2006, we undertook a pilot geophysical experiment at Helheim Glacier, East Greenland, in which we deployed a network of GPS instruments on and around the glacier to measure the ice deformation field as a function of time. The experiment was motivated by the discovery of a new class of earthquakes occurring at glaciers in
Nettles, M., Ahlstrøm, A., Elosegui, P., Hamilton, G., Kahn, S., Langer, M., Stearns, L., Stenseng, Lars, Davis, J., Rkström, G., Forsberg, René, Jørgensen, T., Larsen, T.   +12 more
openaire   +1 more source

Glacier thickness modelling and monitoring with geophysical data constraints: A case study on the Indren Glacier (NW Italy)

Earth Surface Processes and Landforms
AbstractThe ongoing global temperature increase has accelerated the mass loss of glaciers worldwide, with Italian alpine glaciers being particularly vulnerable due to their small size, complex geometries and exposition that implies a fast reaction to thermal and hydrological modifications.
Strallo, Valeria, Colombero, Chiara, Troilo, Fabrizio, Mondardini, Luca, Godio, Alberto   +4 more
openaire   +2 more sources

Learning Across the Divide: Understanding Knowledge Sharing Through Petrographic Analysis on Ceramics From the Rhine‐Meuse Delta During the Middle to Late Neolithic Transition (3400–2200 bce)

Archaeometry, EarlyView.
ABSTRACT Vlaardingen (VL) communities on the Dutch West coast (3400–2200 bce) are part of a unique, long‐term continuity in the European Neolithic. Despite large‐scale changes in European populations during the Neolithic, the genomic diversity and cultural practices of VL communities can be retraced to the Mesolithic.
Jisca de Bruin, Erik Kroon, Lasse van den Dikkenberg, Dennis Braekmans   +3 more
wiley   +1 more source

Assessment of glacial-earthquake source parameters

Journal of Glaciology, 2017
Glacial earthquakes are slow earthquakes of magnitude M~5 associated with major calving events at near-grounded marine-terminating glaciers. These globally detectable earthquakes provide information on the grounding state of outlet glaciers and the ...
STEPHEN A. VEITCH, MEREDITH NETTLES
doaj   +1 more source