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  • METEOROLOGY AND CLIMATOLOGY  (3)
  • 90-590B; 90-591A; 90-591B; 90-592; Aluminium; Barium; Calcium; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Epoch; Event label; Glomar Challenger; Latitude of event; Leg90; Longitude of event; Potassium; Sample code/label; South Pacific/Tasman Sea/CONT RISE; Strontium; X-ray fluorescence (XRF)  (1)
  • Geophysics
  • Models, Molecular
  • Polymer and Materials Science
  • ddc:330
  • 1995-1999
  • 1985-1989  (5)
  • 1988  (5)
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 1995-1999
  • 1985-1989  (5)
Jahr
  • 1
    facet.materialart.
    Unbekannt
    PANGAEA
    In:  Supplement to: Baker, Paul A; Bloomer, Sherman H (1988): The origin of celestite in deep-sea carbonate sediments. Geochimica et Cosmochimica Acta, 52(2), 335-339, https://doi.org/10.1016/0016-7037(88)90088-9
    Publikationsdatum: 2024-02-10
    Beschreibung: Several celestite nodules were recovered on DSDP Leg 90 from four drilling sites on the Lord Howe Rise, southwest Pacific Ocean. The sediments at these sites are predominantly very pure calcareous nannofossil oozes and chalks. As a result of a higher-than average accumulation rate, they undergo relatively rapid burial diagenesis, which causes the expulsion of Sr from the biogenic calcite, to the interstitial waters. Another result of the high accumulation rate is the occurrence of microbial sulfate reduction in the interstitial waters. The downcore Sr increase is proportionately greater than the sulfate decrease, and celestite precipitates below about 100 m subbottom at each of these sites. The celestite contains high concentrations of many substituent cations: 4.3-7.8 mole% BaSO4, 1.7-6.4 mole% CaSO4, 1100-2600 ppm Al, and 400-750 ppm K. Ion activity products of Sr and sulfate at each site were calculated from the Pitzer equations and the measured concentrations of porewater constituents, and are in close agreement with the celestite solubility product corrected for in situ temperatures and pressures. Strontium concentrations of the porewaters are nearly at equilibrium with respect to celestite, and are controlled by the extent of microbial sulfate reduction. Celestite solubility increases with increasing water depth, in excellent agreement with values of the standard state partial molal volume change.
    Schlagwort(e): 90-590B; 90-591A; 90-591B; 90-592; Aluminium; Barium; Calcium; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Epoch; Event label; Glomar Challenger; Latitude of event; Leg90; Longitude of event; Potassium; Sample code/label; South Pacific/Tasman Sea/CONT RISE; Strontium; X-ray fluorescence (XRF)
    Materialart: Dataset
    Format: text/tab-separated-values, 49 data points
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Propellants, Explosives, Pyrotechnics 13 (1988), S. 99-102 
    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
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    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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  • 4
    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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  • 5
    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
    Standort Signatur Erwartet Verfügbarkeit
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