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  • METEOROLOGY AND CLIMATOLOGY  (11)
  • Geophysics
  • Models, Molecular
  • Polymer and Materials Science
  • ddc:330
  • 1995-1999
  • 1985-1989  (13)
  • 1988  (4)
  • 1986  (9)
Sammlung
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 1995-1999
  • 1985-1989  (13)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    The use of SIMS with a microfocused ion beam to study thick corrosion scales (1986)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 9 (1986), S. 388-388 
    Details
    ISSN: 0142-2421
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/sia.740090612
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    The Rheological Properties of Plasticized Nitrocellulose as a function of nitrocellulose precursor (1988)
    Weinheim : Wiley-Blackwell
    Propellants, Explosives, Pyrotechnics 13 (1988), S. 99-102 
    Details
    ISSN: 0721-3115
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Propellant cords have been manufactured from nitrocellulose/nitroglycerin (50/50) pastes containing different types of nitrocellulose. The cords were manufactured using a solvent wet process involving incorporation and extrusion in the highly instrumented propellants processing facility at Waltham Abbey. It has been shown that the biological source from which the nitrocellulose is manufactured (wood or cotton) has a significant influence upon the dough rheology, cord diameter, shear heating and ultimate tensile strength of the dried cords. Additionally, the influence of extrusion rate upon the above parameters has been highlighted. This work compliments that previously undertaken upon the influence of nitrocellulose molecular weight on the properties of propellant doughs and dried cords.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prep.19880130402
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
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    The analysis sensitivity to tropical winds from the Global Weather Experiment (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-19
    Beschreibung: The global scale divergent and rotational flow components of the Global Weather Experiment (GWE) are diagnosed from three different analyses of the data. The rotational flow shows closer agreement between the analyses than does the divergent flow. Although the major outflow and inflow centers are similarly placed in all analyses, the global kinetic energy of the divergent wind varies by about a factor of 2 between different analyses while the global kinetic energy of the rotational wind varies by only about 10 percent between the analyses. A series of real data assimilation experiments has been performed with the GLA general circulation model using different amounts of tropical wind data during the First Special Observing Period of the Global Weather Experiment. In exeriment 1, all available tropical wind data were used; in the second experiment, tropical wind data were suppressed; while, in the third and fourth experiments, only tropical wind data with westerly and easterly components, respectively, were assimilated. The rotational wind appears to be more sensitive to the presence or absence of tropical wind data than the divergent wind. It appears that the model, given only extratropical observations, generates excessively strong upper tropospheric westerlies. These biases are sufficiently pronounced to amplify the globally integrated rotational flow kinetic energy by about 10 percent and the global divergent flow kinetic energy by about a factor of 2. Including only easterly wind data in the tropics is more effective in controlling the model error than including only westerly wind data. This conclusion is especially noteworthy because approximately twice as many upper tropospheric westerly winds were available in these cases as easterly winds.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: Monthly Weather Review (ISSN 0027-0644); 114; 991-1007
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    Analysis/forecast experiments with a flow-dependent correlation function using FGGE data (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-19
    Beschreibung: The use of a flow-dependent correlation function to improve the accuracy of an optimum interpolation (OI) scheme is examined. The development of the correlation function for the OI analysis scheme used for numerical weather prediction is described. The scheme uses a multivariate surface analysis over the oceans to model the pressure-wind error cross-correlation and it has the ability to use an error correlation function that is flow- and geographically-dependent. A series of four-day data assimilation experiments, conducted from January 5-9, 1979, were used to investigate the effect of the different features of the OI scheme (error correlation) on forecast skill for the barotropic lows and highs. The skill of the OI was compared with that of a successive correlation method (SCM) of analysis. It is observed that the largest difference in the correlation statistics occurred in barotropic and baroclinic lows and highs. The comparison reveals that the OI forecasts were more accurate than the SCM forecasts.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Format: text
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  • 5
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    A study for systematic errors of the GLA forecast model in tropical regions (1988)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: From the sensitivity studies performed with the Goddard Laboratory for Atmospheres (GLA) analysis/forecast system, it was revealed that the forecast errors in the tropics affect the ability to forecast midlatitude weather in some cases. Apparently, the forecast errors occurring in the tropics can propagate to midlatitudes. Therefore, the systematic error analysis of the GLA forecast system becomes a necessary step in improving the model's forecast performance. The major effort of this study is to examine the possible impact of the hydrological-cycle forecast error on dynamical fields in the GLA forecast system.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: NASA-TM-101194 , NAS 1.15:101194
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
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    Meteorological atlas of the Southern Hemisphere lower stratosphere for August and September 1987 (1988)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Southern Hemisphere meteorological data for the months of August and September 1987 in the lower stratosphere are shown. National Meteorological Center (NMC) data, Total Ozone Mapping Spectrometer (TOMS) data, and Goddard Laboratory for Atmospheres (GLA) data are used to display polar stereographic projections of 200 to 100 mb vertical mean temperatures, 100 mb zonal mean geopotential height perturbations, total ozone, Ertel's potential vorticity (Epv), and 50 to 30 mb vertical mean temperatures. In addition, latitude height cross sections at 65 W of potential temperature, Epv, geostrophic isotachs, and temperature are also shown. Finally, a longitude height cross section at 65 S of temperature and geostrophic wind vectors is also shown.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: NASA-TM-4049 , REPT-88B0189 , NAS 1.15:4049
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
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    Research highlights of the global modeling and simulation branch for 1986-1987 (1988)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: This document provides a summary of the research conducted in the Global Modeling and Simulation Branch and highlights the most significant accomplishments in 1986 to 1987. The Branch has been the focal point for global weather and climate prediction research in the Laboratory for Atmospheres through the retrieval and use of satellite data, the development of global models and data assimilation techniques, the simulation of future observing systems, and the performance of atmospheric diagnostic studies.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: NASA-TM-4085 , REPT-88B0279 , NAS 1.15:4085
    Format: application/pdf
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  • 8
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    Diabatic heating fields and the generation of available potential energy during FGGE (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Global diabatic heating is estimated using fields of directly computed heating components, in particular those due to shortwave radiation, longwave radiation, sensible heating, and latent heating produced every 6 hours. The role of average fields of diabatic heating in the generation of available potential energy is examined. It is observed that latent heating is most significant in generating available potential energy.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Format: text
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  • 9
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    Comparative energetics diagnosis of the observed and simulated blockings in the Northern Hemisphere (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The blocking phenomena, in particular winter blocking, are stuided using energetic diagnostics. Sequences of blockings during the FGGE winter and summer in observed and simulated circulations, and energy transformations associated with blockings are examined. It is observed that the simulation of the Northern Hemisphere circulation correlates better with the observed circulation during summer than during winter. It is noted that the observed winter blockings are maintained by the supply of kinetic energy to the ultralong waves from the shorter cyclone scales through nonlinear wave-wave interaction; in the simulated winter blocking, the energy converted at the cyclone scale cascades down to the shorter wave range; and the summer blockings are supported by the baroclinic conversion of long waves in both the observed and simulated circulations.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Format: text
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  • 10
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    Global diabatic heating during FGGE SOP-1 and SOP-2 (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: With the increase in the observational data provided by FGGE and the use of global circulation models with full physics for the data assimilation, it is now becoming feasible to attempt to estimate globally the atmospheric diabatic heating. The thermodynamic equation in isobaric coordinates and the data generated by the FGGE III-b analysis of the Goddard Laboratory for Atmospheres (GLA) are employed to serve this purpose. The results of the present study generally agree with other previous investigations. However, some important differences are also revealed. (1) The diabatic heating obtained in the tropics in the present study is larger than that obtained elsewhere; (2) the relatively large heating over the mountainous areas shown in other studies does not appear; (3) no significant negative values of diabatic heating are found in the polar regions; and (4) unlike other studies, cooling is noted over parts of Eurasia in the summer.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: Monthly Weather Review (ISSN 0027-0644); 114; 2578-258
    Format: text
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