Results 291 to 300 of about 7,279,413 (322)

Sea-Ice Concentration Derived From GNSS Reflection Measurements in Fram Strait

IEEE Transactions on Geoscience and Remote Sensing, 2019
Reflection power derived from the global navigation satellite system (GNSS) observations and its sensitivity to sea-ice concentration are investigated in this article.
A. M. Semmling, A. Rösel, D. Divine, S. Gerland, G. Stienne, S. Reboul, Marcel Ludwig, J. Wickert, H. Schuh   +8 more
semanticscholar   +1 more source

Multi-year ice concentration from RADARSAT

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
The U.S. National Ice Center requires a robust multiyear ice classification algorithm that can handle variability in backscatter across uncalibrated 500 km RADARSAT scenes. ERS-1 images are used to test a dynamic threshold algorithm. The best results were obtained with a window size of 32, delta of 0.8, Fisher partition criterion and closing.
F. Fetterer, C. Bertoia, null Jing Ping Ye   +2 more
openaire   +1 more source

On the vacancy concentration in ice

Physics Letters A, 1977
Abstract Based on the diffusion constant for self-diffusion in ice, which is believed to take place by a vacancy mechanism, we estimate the relative vacancy concentration near the melting point to be at least ∼ 10 −6 , i.e. much higher than previous estimates of about 10 −10 .
O.E. Mogensen, M. Eldrup
openaire   +1 more source

Ice-age atmospheric concentration of nitrous oxide from an Antarctic ice core

Nature, 1992
INCREASING anthropogenic emissions of greenhouse gases are expected to influence the Earth's climate, but the mechanisms for this are not yet fully understood. One way to determine the effect of such gases on climate is to study their atmospheric concentrations during periods of past climate change, such as glacial to interglacial transitions. Previous
Leuenberger-Lüthy, Markus Christian, Siegenthaler, Ulrich   +1 more
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Fluoride Concentration and pH of Iced Tea Products

Caries Research, 2002
The objective of this study was to determine the fluoride concentration and pH of 44 iced tea samples and hence to assess the possible role of these beverages as systemic fluoride source as well as their potential cariogenic and erosive character. Ten tea samples were available as a granular instant powder, and 34 as ready-to-drink liquid products. The
Annekathrin, Behrendt, Volker, Oberste, Willi Eckhard, Wetzel   +2 more
openaire   +2 more sources

Response of passive microwave sea ice concentration algorithms to thin ice

2014 IEEE Geoscience and Remote Sensing Symposium, 2014
The influence of sea ice thickness brightness temperatures and ice concentrations retrieved from passive microwave observations is quantified, using horizontally homogeneous sea ice thickness retrievals from ESA's SMOS sensor observations at high incidence angles.
Georg Heygster, Marcus Huntemann, Natalia Ivanova, Roberto Saldo, Leif Toudal Pedersen   +4 more
openaire   +1 more source

Multisensor comparison of ice concentration estimates in the marginal ice zone

Journal of Geophysical Research: Oceans, 1987
Aircraft remote sensing data collected during the 1984 summer Marginal Ice Zone Experiment in the Fram Strait are used to compare ice concentration estimates derived from synthetic aperture radar (SAR) imagery, passive microwave imagery at several frequencies, aerial photography, and spectral photometer data.
B. A. Burns, D. J. Cavalieri, M. R. Keller, W. J. Campbell, T. C. Grenfell, G. A. Maykut, P. Gloersen   +6 more
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Simulating Local Concentration Factor Sensitivities for Ice Crystal Icing Using LEWICE3D

SAE Technical Paper Series, 2023
<div class="section abstract"><div class="htmlview paragraph">Determining local ice crystal icing concentration factors in the region of the forward fuselage is critical for setting the Total Water Content levels for air data probe qualification testing.
openaire   +1 more source

Concentrations of Ice Crystals in Clouds

Bulletin of the American Meteorological Society, 1970
Abstract Some cumulus clouds appear to be capable of producing ice crystals in concentrations of 10–100l−1 at temperatures approaching −5C. This has serious implications for cloud seeding with ice nuclei. We discuss various possible mechanisms by which these unexpectedly high concentrations may originate.
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Ice Crystals Agglomerated in Freeze Concentration

1994
Freeze concentration is required to produce large ice crystals in order to reduce the loss of solutes adhering to the surface of the ice crystals removed. We examine here if large agglomerated ice crystals would be produced from a lactose solution in a common batch crystallizer with an inner heat exchanger. Large agglomerated ice crystals (ca.
Yoshihito Shirai, Kazuhiro Nakanishi, Ryuichi Matsuno   +2 more
openaire   +1 more source