Results 261 to 270 of about 1,498,627 (306)
Some of the next articles are maybe not open access.
Atmosphere-Ocean, 2014
AbstractIce concentration data from passive microwave sensors are not reliable during the summer melt season. In this study passive microwave ice concentration estimates are improved upon through the assimilation of ice surface temperature data from the Moderate-Resolution Imaging Spectroradiometer (MODIS).
Wenxia Tan +2 more
openaire +1 more source
AbstractIce concentration data from passive microwave sensors are not reliable during the summer melt season. In this study passive microwave ice concentration estimates are improved upon through the assimilation of ice surface temperature data from the Moderate-Resolution Imaging Spectroradiometer (MODIS).
Wenxia Tan +2 more
openaire +1 more source
Retrieving Ice Concentration From SMOS
IEEE Geoscience and Remote Sensing Letters, 2011The Soil Moisture and Ocean Salinity (SMOS) Ice project explored the potential of retrieving sea-ice information from the SMOS satellite, a polar-orbiting L-band radiometer successfully launched in November 2009. Toward this end, radiance measurements were collected over the Northern Baltic during the Pol-Ice campaign.
Peter Mills, Georg Heygster
openaire +1 more source
Assimilation of Ice Concentration in an Ice–Ocean Model
Journal of Atmospheric and Oceanic Technology, 2006Abstract Ice concentration is a critical parameter of the polar marine environment because of the large effect sea ice has on the surface albedo and heat exchange between the atmosphere and the ocean. Simulations of the energy exchange processes in models would benefit if the ice concentration were represented more accurately. Reanalysis
J. Zhang, R. W. Lindsay
openaire +1 more source
Ice Particle Concentrations in Clouds
Journal of the Atmospheric Sciences, 1985Abstract Measurements and observations have been made on the development of ice in 90 cumulus (cumulus and cumulonimbus) and 72 stratiform (altocumulus, altostratus, nimbostratus, stratocumulus, and stratus) clouds. Ice particle concentrations significantly in excess of those to be expected from ice nucleus measurements (i.e., ice enhancement) were ...
Peter V. Hobbs, Arthur L. Rangno
openaire +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, 2002The 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 +2 more
openaire +1 more source
On the vacancy concentration in ice
Physics Letters A, 1977Abstract 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, 1992INCREASING 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 +1 more
openaire +1 more source
Fluoride Concentration and pH of Iced Tea Products
Caries Research, 2002The 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 +2 more
openaire +2 more sources
Response of passive microwave sea ice concentration algorithms to thin ice
2014 IEEE Geoscience and Remote Sensing Symposium, 2014The 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 +4 more
openaire +1 more source
Multisensor comparison of ice concentration estimates in the marginal ice zone
Journal of Geophysical Research: Oceans, 1987Aircraft 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 +6 more
openaire +1 more source