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  • Books  (3)
  • Other Sources  (74)
  • 2020-2022  (4)
  • 1985-1989  (73)
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  • 1
    Call number: MOP 47168 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 127 Seiten , Illustrationen , 19 cm
    Edition: Fünfte, durchgesehene Auflage
    ISBN: 3405131014 (kart.)
    Series Statement: BLV-Umweltwissen
    Language: German
    Note: Inhalt: Vorwort Einführung Das Waldsterben - eine Komplexkrankheit Die Fichte läßt aufhorchen Ausdehnung der Krankheit Auch junge Bestände betroffen Kiefer und Laubbäume machen keine Ausnahme Ein ganzes Ökosystem ist in Gefahr Das Ausmaß der Schäden Die Ursachen Wirtschaftsweise ohne Einfluß Klassische Rauchschäden - Waldsterben Die Vielfalt der Symptome Ratschläge für die Schadensfeststellung Tanne Wissenswertes zur Tanne Geschichte der Erkrankung Krankheitssymptome Der Naßkern der Tanne und seine Bedeutung Krankheitsverlauf Vermehrungsfähigkeit Was nicht zum Tannensterben gehört Zusammenfassung der Schadsymptome Fichte Wissenswertes zur Fichte Geschichte der Erkrankung Krankheitssymptome Zusammenfassung der Schadsymptome Kiefer Wissenswertes zur Kiefer Geschichte der Erkrankung Krankheitssymptome Weitere Einflußgrößen Was muß bei der Beurteilung der Schäden an Kiefer beachtet werden? Andere Absterbeerscheinungen an Kiefer Zusammenfassung der Schadsymptome Buche Wissenswertes zur Buche Geschichte der Erkrankung Krankheitssymptome Andere Erkrankungen an Buche Zusammenfassung der Schadsymptome Andere Holzarten Eiche Esche Lärche Sonstige Schäden im Wurzelbereich Tanne Fichte Buche Zusammenfassung Waldsterben weltweit Europa Nordamerika Asien Zwischenbilanz und Ausblick Glossar Register
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Commission of the European Communities
    Call number: M 09.0265/2.Ex. ; M 09.0265/1.Ex.
    Type of Medium: Monograph available for loan
    Pages: 44 S. : Ill., graph. Darst.
    Series Statement: Euratom publications - EUR 12915 EN
    Location: Upper compact magazine
    Location: Upper compact magazine
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 3
    Series available for loan
    Series available for loan
    Göteborg : Geologiska Inst.
    Associated volumes
    Call number: SR 91.0154(66)
    In: Publikationer
    Type of Medium: Series available for loan
    Pages: Getr. Zählung
    Series Statement: Publikationer / Geologiska Institutionen, Chalmers Tekniska Högskola : A 66
    Language: Undetermined
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    facet.materialart.
    Unknown
    Armann u. Pillmeier, Cassel
    In:  SUB Göttingen | KART B 140:4822;KART H 140:Gudensberg
    Publication Date: 2021-06-02
    Description: Geologische Karte 1: 25 000 mit Erläuterungen. Digitalisat des FID GEO (Fachinformationsdienst Geowissenschaften der festen Erde), erstellt durch das GDZ (Göttinger Digitalisierungszentrum), Karte aus dem Bestand der SUB Göttingen. GeoTIFF erstellt durch FID GEO, SUB Göttingen. Koordinaten Vorlage: Nullmeridian Ferro E 027 00 - 027 10 / N 051 12 - 051 06.
    Description: map
    Description: DFG, SUB Göttingen
    Keywords: 912 ; 554.3 ; Geologische Karte ; Gudensberg ; GeoTIFF ; FID-GEO-DE-7
    Language: German
    Type: map_digi
    Format: 114
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  • 5
    Publication Date: 2021-10-13
    Description: Large-scale conversion of natural forest to rubber plantations has taken place for decades in Southeast Asia, help to make it a deforestation hot spot. Besides negative changes in biodiversity, ecosystem water, and carbon budgets, converting forests to plantations often reduced CH4 uptake by soils. The latter process, which might be partly responsible for resumed increase in the growth rate of CH4 atmospheric concentrations since 2006, has not been adequately investigated. We measured soil surface CH4 fluxes during 2014 and 2015 in natural forests and rubber plantations of different age and soil textures in Xishuangbanna, Southwest China—a representative area for this type of land-use change. Natural forest soils were stronger CH4 sinks than rubber soils, with annual CH4 fluxes of −2.41 ± 0.28 and −1.01 ± 0.23 kg C ha−1 yr−1, respectively. Water-filled pore space was the main factor explaining the differences between natural forests and rubber plantations, even reverting rubber soils temporarily from CH4 sink into a methane source during the rainy season in older plantations. Soil nitrate content was often lower under rubber plantations. Added as a model covariate, this factor improved explanation power of the CH4 flux—water-filled pore space regression. Although soils under rubber plantation were more clayey than soils under natural forest, this was not the decisive factor driving higher soil moisture and lower CH4 uptake in rubber soils. Thus, the conversion of forests into rubber plantations exerts a negative impact on the CH4 balance in the tropics and likely contributes to global climate.
    Keywords: 631.4 ; deforestation ; land-use change ; methane ; rubber plantation ; soil moisture ; soil texture ; tropics
    Language: English
    Type: map
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  • 6
    facet.materialart.
    Unknown
    Universität Göttingen,Abteilung Bodenphysik
    In:  Universität Göttingen
    Publication Date: 2024-06-03
    Description: research
    Keywords: Stoffübergang ; Nitrifikation ; Waldboden ; Buchenwald ; Forstlicher Standort ; Waldboden Solling ; Nitrifikation ; Waldboden Buchenwald ; Buchenwald
    Language: German
    Type: doc-type:book
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  • 7
    Publication Date: 2011-08-19
    Description: A model for the brightness temperature of a canopy which is based on the physical characteristics of the vegetation is being developed. This model uses the Peake model to relate the scattering coefficient of the vegetation to its radiometric brightness temperature and a discrete scattering model to computer the scattering coefficient. A distorted Born approximation is used to provide a tractable solution to the scattering problem. To verify the theory a comparison has been made with experiments. Radiometric measurements of brightness temperature were made at L- and C-bands over a crop of mature soybeans, along with ground truth measurements. All model input parameters were measured; there were no free parameters to adjust to obtain agreement with the measurements. Results showed that agreement between theory and measurements was reasonable for horizontal polarization at both L- and C-bands with dry underlying soil.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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  • 8
    Publication Date: 2011-08-19
    Description: Coupled-mode rate equations for coupled-cavity lasers are derived using a novel approach. The method, based on the Mittag-Leffler theorem, is exact. The coupling coefficients are compared to those derived by several different approximations.
    Keywords: LASERS AND MASERS
    Type: IEEE Journal of Quantum Electronics (ISSN 0018-9197); QE-24; 66-72
    Format: text
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  • 9
    Publication Date: 2011-08-19
    Description: A high-power low-threshold graded-index separate confinement heterostructure AlGaAs single quantum well laser on Si substrates has been demonstrated for the first time by a hybrid growth of migration-enhanced molecular beam epitaxy followed by metalorganic vapor phase epitaxy. The quantum well laser showed an output power of more than 400 mW per facet under pulsed conditions. A room-temperature threshold current of 300 mA was obtained with a differential quantum efficiency of 40 percent without facet coating. The threshold current density was 550 A/sq cm for a cavity length of 500 microns. These results show the highest peak power reported to date for low-threshold lasers on Si substrates. The full width at half maximum of the far-field pattern parallel to the junction was 6 deg. Threshold current densities as low as 250 A/sq cm were obtained for lasers on GaAs substrates.
    Keywords: LASERS AND MASERS
    Type: Applied Physics Letters (ISSN 0003-6951); 55; 1492-149
    Format: text
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  • 10
    Publication Date: 2011-08-19
    Description: A high-peak-power low-threshold AlGaAs/GaAs double-heterostructure stripe laser diode on Si substrats, grown by hybrid migration-enhanced molecular beam epitaxy (MEMBE) and metalorganic chemical vapor deposition (MOCVD) has been demonstrated for the first time. These devices showed the highest peak powers of up to 184 mW per facet reported so far for double-heterostructure stripe laser diodes on Si substrates, room-temperature pulsed threshold currents as low as 150 mA, and differential quantum efficiencies as high as 30 percent without mirror facet coating. An intrinsic threshold current density has been estimated to be about 2 kA/sq cm when taking current spreading and lateral diffusion effects into account. Low dislocation density shows that MEMBE can be a useful method to grow high-quality GaAs and AlGaAs/GaAs layers on Si substrates by combining with MOCVD.
    Keywords: LASERS AND MASERS
    Type: Applied Physics Letters (ISSN 0003-6951); 53; 1248-125
    Format: text
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