Microwave emission from polar firn by A. T. C. Chang

Cover of: Microwave emission from polar firn | A. T. C. Chang

Published by National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va., for sale by the National Technical Information Service, 1978. in Washington .

Written in English

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  • Microwaves.,
  • Scattering (Physics),
  • Ice -- Arctic regions.

Edition Notes

Book details

StatementA. T. C. Chang, B. J. Cloudhury.
SeriesNASA technical paper ; 1212, NASA technical paper -- 1212.
ContributionsChoudhury, B. J., United States. National Aeronautics and Space Administration. Scientific and Technical Information Office.
The Physical Object
Paginationiii, 20 p. :
Number of Pages20
ID Numbers
Open LibraryOL17647712M

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Microwave emission from polar firn. Washington: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors.

The microwave emission from a half-space medium, characterized by coordinate dependent scattering and absorbing centers, was calculated by numerically solving the radiative transfer equation by the method of invariant imbedding. Rayleigh scattering phase functions and scattering induced polarization of the radiation were included in the.

Microwave Principles (Princeton, NJ et al.: McGraw-Hill Book Co., c), by Rabindra N. Ghose (page images at HathiTrust) Microwave Processing of Materials, by National Research Council Microwave emission from polar firn book Materials Advisory Board (page images at NAP) Microwave emission from polar firn /.

Chang has written: 'Microwave emission from polar firn' -- subject(s): Microwaves, Scattering (Physics), Ice Asked in Animated TV Series Is it true that Cardcaptor Sakura is real. Field measurements of microwave emission from snow-covered soil were carried out in, and on the Italian Alps using a three-frequency dual polarized microwave system.

Physical Models of Layered Polar Firn Brightness Temperatures from GHz to 2 GHz Article (PDF Available) in IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 8(7. Microwave emission from polar firn / (Washington: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, ), by A.

Chang, B. Choudhury, and United States. National Aeronautics and Space Administration. Tsang, E. Njoku, and J. Kong, "Microwave thermal emission from a stratified medium with nonuniform temperature distribution," Journal of Applied Physics, 46(12),December L. Tsang and J.

Kong, "The brightness temperature of a half-space random medium with nonuniform temperature profile," Radio Science, 10(12), The first description of microwaves use for subsurface sensing is attributed to a German patent by Leimbach and Löwy from (Daniels, ).In this patent, propagation of microwaves between pairs of vertically buried dipole antennas has been used to detect any subsurface objects with higher conductivity than the surrounding medium.

Abstract. Physical fundamentals and constraints of passive micro-wave remote sensing are discussed. Application areas are indicated, the rationale for multi-wavelength operation of passive microwave sensors is reviewed and the state of the art in radiometer systems is by: 2.

Seasonally frozen ground and permafrost contain unfrozen water (Figure 4) and ice in equilibrium at temperatures less than 0 °C as a result of the effects of soil particles and the absence of solutes, temperature, T, and the soil's specific surface area, S, are the primary determinants of the amount of unfrozen water, θ u, and are empirically related by.

The firn correction is defined as the difference between the actual depth of the firn layer and the depth that the firn would be if it was all at the density of meteoric ice.

Van den Broeke, M. R., van de Berg, W. J., and van Meijgaard, E.: Firn depth correction along the Antarctic grounding line, Antarct. Critical porosity of gas enclosure in polar firn independent of climate, Climate of the Past Microstructure in Snow Microwave Radiative Transfer (MICROSNOW) Workshop, University of Reading, 6 August - 8 August The influence of spatial variability of polar firn on microwave emission, EGU General Assembly, 27 April - 2.

A snowpack can be described in many different ways. Microwave emission from polar firn book Although snow depths can be easily measured, the snow water equivalent (S WE in mm) is the more relevant property of a snowpack for most snow hydrological questions since the S WE is the water content in snow that directly contributes to runoff.

The S WE is defined as the amount of liquid water that would be obtained upon complete melting of. Cambridge Core - Environmental Science - Climate Change in the Polar Regions - by John TurnerCited by: A major area as part of the International Polar Year (IPY) involves developing a better understanding of past climates and the impact of anthropogenic activity on the Earth's atmosphere.

Because instrumental records of atmospheric chemistry are limited, natural archives of atmospheric composition must be made, such as polar firn. Research Interests. My research is devoted to the physical understanding of microstructural controls on snow physical properties (heat transfer, mechanics, electromagnetics, crystal growth) in the context of remote sensing, polar climatology and natural hazards.

Konrad Steffen Publications. Peer-Reviewed Publications. Thomson Reuters W., K. Steffen, Accumulation and hoar effects on microwave emission on the Greenland ice sheet dry snow zones, J Investigations of meltwater refreezing and density variations in the snowpack and firn within the percolation zone of the Greenland.

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We have identified and quantified CFC (CFCl2CFCl2), CFCa (CF2ClCCl3), CFCa (CF3CCl3) and HCFCa (CF3CH2Cl) in the atmosphere (Fig. We have reconstructed their past abundances from air extracted from deep polar firn, which can provide a natural archive of atmospheric composition up to about a century back in time5.

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Climatic interpretation from the stable water isotope composition of firn-cores from the northern Emission of Biogenic Hydrocarbons from Antarctic Mosses: Implications for biosphere- ISBN ISBN Mini Symposium: Tropical Antarctic Teleconnections, August Accelerated ice flow near the equilibrium line of west-central Greenland Ice Sheet (GIS) has been attributed to an increase in infiltrated surface melt water as a response to climate warming.

The assessment of surface melting events must be more than the detection of melt onset or extent. Retrieval of surface melt magnitude is necessary to improve understanding of ice sheet flow and surface Cited by: 5.

In this study, we use active microwave scatterometry to assess melt season duration and the relative concentration of refrozen ice lenses in Antarctic ice shelf firn. We demonstrate a physical relationship between melt days and backscatter using scatterometry and field data from Greenland, and apply the observed relationship to derive and map a.

Relocate the emission point of a coal fired power station to a pristine area (offshore, desert, forest) to create an artificial CO2 dome in the air, with higher CO2 concentrations closer to the emission point. The flue gas can be additionally filtered from ash and soot particles, and cooled to the ambient temperatures.

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many scientists. BOX Climate Change and Polar Amplification. The carbon dioxide content of the atmosphere has been steadily increasing from its preindustrial value of ~ parts per million (ppm) (Figure) (IPCC, a), and the rate of increase has significantly intensified in the past 60 years, from ppm per year in (when measurements were started) to nearly 2 ppm per year in Abstract.

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Applications of remote sensing in glaciology 1. WHAT ARE GLACIERS. Dense ice Accumulation of snow exceeds its ablation over many years Form only on land Change landscapes due to their weight when they flow through Distinct from thinner sea ice and lake ice that form on the surface of bodies of water Cover 10% of world’s land 99% of glacial ice contained in the polar regions Largest.

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Full text of "NASA Technical Reports Server (NTRS) Active microwave workshop report" See other formats. Kuczynski and Frenkel developed the first quantitative models for sintering in the s (Kuczynski ).Over the following two decades the basis of a theoretical framework was established (LenelKingery and BergCoble,Kingery ).Reviews of sintering with overviews of these earlier works have been given by Exner and Arzt () and German ().Cited by: Program Guide Book.

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Recent developments in remote sensing techniques, and the acquisition of new data sets, have resulted in significant advances in our understanding of all components of. Humidity; Weather front; Clouds, 5. Cirrus cloud; Cumulonimbus cloud; Cumulus cloud; Precipitations, 8.

Precipitation (meteorology) Black ice; Dew; Frost; Hail.Currently, interpretation of the polar ice core data assumes that diffusion controls the rate at which chemical species are incorporated into the firn. The proposed project will determine the site-specific extent of ventilation in the firn, and will provide a model for multidimensional diffusion and ventilation on grain growth, sublimation.Of the modern technologies in polar-region monitoring, the remote sensing technology that can instantaneously form large-scale images has become much more important in helping acquire parameters such as the freezing and melting of ice as well as the surface temperature, which can be used in the research of global climate change, Antarctic ice sheet responses, and cap formation and Cited by: 1.

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