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  • 1
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    In:  IEEE Transactions on Geoscience and Remote Sensing, Luxembourg, Conseil de l'Europe, vol. 36, no. 5, pp. 1835, pp. 2501, (ISBN: 0-12-018847-3)
    Publication Date: 1998
    Keywords: InSAR ; Geodesy ; Crustal deformation (cf. Earthquake precursor: deformation or strain)
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  • 2
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    In:  Eos, Trans., Am. Geophys. Un., Warszawa, EGS, vol. 76, no. 24, pp. 241, pp. 1050, (ISSN: 1340-4202)
    Publication Date: 1995
    Keywords: Volcanology ; Earthquake precursor: prediction research ; Project report/description
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  • 3
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    Soc. Professional Well Log Analysts
    In:  Transactions SPWLA Symposium, Lafayette, Louisiana, June 1990, GFZ Potsdam, Germany, Soc. Professional Well Log Analysts, vol. 10, no. paper SPWLA 90-H, pp. 26-33, (ISBN 3-933346-037)
    Publication Date: 1990
    Keywords: Borehole Televiewer ; Instruments ; Borehole geophys.
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  • 4
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    Halliburton Energy Services
    In:  Bull., Open-File Rept., Open Hole Logging, Washington, D. C., Halliburton Energy Services, vol. 5, no. 16, pp. 127-131, (ISBN 1-86239-165-3, vi + 330 pp.)
    Publication Date: 1993
    Keywords: Borehole geophys. ; Instruments ; Borehole Televiewer ; Data analysis / ~ processing
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  • 5
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    Halliburton Logging Services
    In:  Professional Paper, Open-File Rept., Telecast, Berlin, Halliburton Logging Services, vol. 14B, no. 16, pp. 465-469, (ISBN 1-86239-165-3, vi + 330 pp.)
    Publication Date: 1992
    Keywords: Borehole geophys. ; Borehole Televiewer ; Dipmeter, ~analysis
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  • 6
    Publication Date: 2011-08-24
    Description: In 1958, the United Nations (UN) formally recognized a new potential for international cooperation by establishing an ad hoc Committee on the Peaceful Uses of Outer Space (COPUOS). A year later the Committee became a permanent body, and by 1983 membership had expanded to 53 states, with more than half of the members coming from the developing world. In 1970, COPUOS established the UN Program on Space Applications in order to strengthen cooperation in space science and technology between non-industrialized and industrialized countries. In the last few years, the UN and its COPUOS have paid increasing attention to education and research in space science and technology, including basic space science. In 1991 the UN, in cooperation with ESA, initiated the organization of annual Workshops in Basic Space Science for developing countries. These Workshops are designed to be held in one of the following major regions: Asia and the Pacific, Latin America and the Caribbean, Africa, Western Asia, and Europe. Accordingly, Basic Space Science Workshops have already been held in India (1991), Costa Rica andColombia (1992), and Nigeria (1993). The fourth Workshop was held from 27 June to 1 July 1994 at the Cairo University, in Egypt, for Western Asia.
    Keywords: SPACE SCIENCES (GENERAL)
    Type: ESA Bulletin (ISSN 0376-4265); 81ry; p. 18-21
    Format: text
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  • 7
    Publication Date: 2011-08-24
    Description: The development of the springtime (September-November) Antarctic ozone hole was observed by the Meteor 3/total ozone mapping spectromter (TOMS) to result in the lowest ozone value, 85 DU (Dobson units) on October 8, 1993, ever measured by TOMS. During late September and early October the region of extremely low ozone values was centered on the geographical pole between 85 deg S and 90 deg S. The geographical extent of the ozone hole region, the area within the 220-DU contour, reached a maximum during the first week in October at a near-circular area covering 24 x 10(exp 6) sq km reaching to the southern tip of South America. This approximately matched the 1992 area record. After the maximum area was reached in early October, the 1993 ozone hole region was significantly larger than during 1992 throughout the remainder of the month of October. The very low ozone values over the Antarctic continent have been confirmed by independent ground-based data. Unlike 1992, the formation of the 1993 Antarctic ozone hole does not coincide with unusually low ozone values observed over most of the globe for the past 2 years. The most recent ozone data from Meteor 3/TOMS show that there has been a recovery at all latitudes from the extraordinarily low values observed during 1992 and part of 1993 after the June 1991 eruption of Mount Pinatubo. Meteor 3/TOMS is described and compared with Nimbus 7/TOMS during the 1991 to May 1993 overlap period. Observations of the 1992 ozone hole are presented from both instruments and are shown to agree within 5 DU.
    Keywords: ENVIRONMENT POLLUTION
    Type: Journal of Geophysical Research (ISSN 0148-0227); 100; D2; p. 2973-2983
    Format: text
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  • 8
    Publication Date: 2011-08-24
    Description: Total Ozone Mapping Spectrometer (TOMS) measurements of equatorial total ozone following the eruption of Mt. Pinatubo show a decrease of up to 6 percent over climatology. Ozone losses begin approximately a month following the eruption, consistent with the time required for the SO2 to convert to sulfuric acid aerosol. The thick aerosol layer interferes with the TOMS retrieval, but this interference is small and easily accounted for in the retrieval. Ozone values remain below climatology until December, 1991. Ozonesonde data from Natal, Brazil taken before and two months after the eruption support TOMS observations of ozone loss. These sondes show that the ozone loss region is confined to a 2-3 km thick layer between 24 and 28 km.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 1; p. 29-32.
    Format: text
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  • 9
    Publication Date: 2011-08-24
    Description: Results of a simulation study on the effects of optically thick stratospheric sulfate aerosol layers on the backscattered ultraviolet radiation (buv) in the range 256-340 nm are presented. In general, the increased Mie scattering produced by the aerosols results in an enhancement of the buv radiation. The increase is approximately linear with optical depth and strongly depends on solar zenith angle and aerosol layer altitude in relation to the ozone maximum. The effect is greatest at those wavelenghts whose contribution functions peak in the vicinity of the densest part of the aerosol layer. The aerosol induced perturbation of the buv field affects the ozone profile retrieval from space measurements by the Solar Backscatter Ultraviolet Experiment (SBUV) experiment. In the tropical stratosphere, the retrieved ozone between 25 and 45 km is underestimated as a result of increased Mie scattering. On the other hand, an algorithm related effect causes the retrieved ozone below 25 km to be overestimated by an amount similar to the stratospheric deficit.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Geopysical Research Letters (ISSN 0094-8276); 22; 3; p. 235-238
    Format: text
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  • 10
    Publication Date: 2011-08-24
    Description: Small areas of sharply reduced ozone density appear frequently in the maps produced from polar region total ozone mapping spectrometer (TOMS) data. These mini-holes are of the order of 1000 km in extent with a lifetime of a few days. On the basis of measurements from ground-based instruments, balloon-borne ozonesondes, and simultaneous measurements of aerosol and ozone concentrations during aircraft flights in the Arctic and Antarctic regions, the appearance of polar stratospheric clouds (PSCs) are frequently associated with false reductions in ozone derived from the TOMS albedo data. By combining radiative transfer calculations with the observed PSC and ozone data, it is shown that PSCs located near or above the ozone density maximum (with optical thickness greater than 0.1) can explain most of the differences between TOMS ozone data and ground or in situ ozone measurements. Several examples of real and false TOMS mini-hole phenomenon are investigated using data from the 1989 Airborne Arctic Stratospheric Expedition (AASE) and from balloon flights over Norway and Sweden.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 97; D12,; 13
    Format: text
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