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  • METEOROLOGY AND CLIMATOLOGY  (7)
  • Geophysics
  • Models, Molecular
  • Polymer and Materials Science
  • ddc:330
  • 1995-1999
  • 1985-1989  (8)
  • 1988  (4)
  • 1987  (4)
Collection
Keywords
Publisher
Years
  • 1995-1999
  • 1985-1989  (8)
Year
  • 1
    Electronic Resource
    Electronic Resource
    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
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: 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.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prep.19880130402
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Experiments with a three-dimensional statistical objective analysis scheme using FGGE data (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A three-dimensional (3D), multivariate, statistical objective analysis scheme (referred to as optimum interpolation or OI) has been developed for use in numerical weather prediction studies with the FGGE data. Some novel aspects of the present scheme include: (1) a multivariate surface analysis over the oceans, which employs an Ekman balance instead of the usual geostrophic relationship, to model the pressure-wind error cross correlations, and (2) the capability to use an error correlation function which is geographically dependent. A series of 4-day data assimilation experiments are conducted to examine the importance of some of the key features of the OI in terms of their effects on forecast skill, as well as to compare the forecast skill using the OI with that utilizing a successive correction method (SCM) of analysis developed earlier. For the three cases examined, the forecast skill is found to be rather insensitive to varying the error correlation function geographically. However, significant differences are noted between forecasts from a two-dimensional (2D) version of the OI and those from the 3D OI, with the 3D OI forecasts exhibiting better forecast skill. The 3D OI forecasts are also more accurate than those from the SCM initial conditions. The 3D OI with the multivariate oceanic surface analysis was found to produce forecasts which were slightly more accurate, on the average, than a univariate version.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review (ISSN 0027-0644); 115; 272-296
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Mean state and long term variations of temperature in the winter middle atmosphere above northern Scandinavia (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169); 49; 655-674
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A study for systematic errors of the GLA forecast model in tropical regions (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: 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.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-101194 , NAS 1.15:101194
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Meteorological atlas of the Southern Hemisphere lower stratosphere for August and September 1987 (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: 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.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-4049 , REPT-88B0189 , NAS 1.15:4049
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Research highlights of the global modeling and simulation branch for 1986-1987 (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: 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.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-4085 , REPT-88B0279 , NAS 1.15:4085
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Forecast experiments with the NASA/GLA stratospheric/tropospheric data assimilation system (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: For the first time, a four-dimensional stratospheric/tropospheric data assimilation system with a top analysis level at 0.4 mb has been developed and used to produce physically consistent gridded analyses for the stratosphere as well as the troposphere for a period during the First GARP Global Experiment (FGGE) and Limb Infrared Monitor of the Stratosphere (LIMS) (November 1978-May 1979). The system consists of a two-dimensional optimum interpolation analysis with 18 mandatory pressure levels and a 19-level fourth order stratospheric/tropospheric general circulation model with a horizontal resolution of 4 (latitude) by 5 deg (longitude) and a top at 0.3 mb. The system allows the utilization of stratospheric data including LIMS, Tiros-N retrievals, rocketsondes and vertical temperature profile radiometer soundings in addition to the other FGGE level 2b data. These data are analyzed every six hours. In order to examine the quality of the analyzed data, forecast experiments starting from different analyses are performed for the period of the stratospheric sudden warming of late February 1979. The results indicate that by employing the present four-dimensional assimilation approach, the medium-range forecast skill for this event is improved.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Short- and medium-range numerical weather prediction; Aug 04, 1986 - Aug 08, 1986; Tokyo; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Impact of satellite-based data on FGGE general circulation statistics (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The NASA Goddard Laboratory for Atmospheres (GLA) analysis/forecast system was run in two different parallel modes in order to evaluate the influence that data from satellites and other FGGE observation platforms can have on analyses of large scale circulation; in the first mode, data from all observation systems were used, while in the second only conventional upper air and surface reports were used. The GLA model was also integrated for the same period without insertion of any data; an independent objective analysis based only on rawinsonde and pilot balloon data is also performed. A small decrease in the vigor of the general circulation is noted to follow from the inclusion of satellite observations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Royal Meteorological Society, Quarterly Journal (ISSN 0035-9009); 113; 255-277
    Format: text
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    NASA TECHNICAL REPORTS
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