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  • 1
    Monograph available for loan
    Monograph available for loan
    Hamburg : Selbstverlag
    Call number: PIK N 456-98-0417
    Type of Medium: Monograph available for loan
    Pages: 37 p.
    Series Statement: Technical Report 16
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 2
    Call number: MOP Per 676(25)
    In: Bonner meteorologische Abhandlungen
    Type of Medium: Monograph available for loan
    Pages: IV, 73 S.
    ISBN: 3427758516
    Series Statement: Bonner meteorologische Abhandlungen 25
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 3
    Call number: MOP Per 676(20)
    In: Bonner meteorologische Abhandlungen
    Type of Medium: Monograph available for loan
    Pages: 67 S.
    Series Statement: Bonner meteorologische Abhandlungen 20
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 4
    Call number: MOP Per 676(17)
    In: Bonner meteorologische Abhandlungen
    Type of Medium: Monograph available for loan
    Pages: XIII, 609 S.
    Series Statement: Bonner meteorologische Abhandlungen 17
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 17 (1968), S. 186-206 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Summary The wind field up to an altitude of about 2 km and its kinematic parameters horizontal divergence and relative vorticity are determined as features of the land and lake wind system by means of pilot-balloon observations effectuated at a tropical inland lake (Lake Victoria, 0–3° S). A connection of these entities, which show a diurnal variation, and the general flow near the equator is discussed.
    Abstract: Résumé On détermine le champ de vent et ses grandeurs cinématiques par des observations effectuées par ballons-pilotes jusqu'à 2 km de hauteur; ces grandeurs sont: la divergence horizontale et le tourbillon relatif. Elles servent de caractéristiques à un système de brises de mer et de terre au bord d'un lac tropical (Lac Victoria 0° à 3° S). On discute une relation entre ces grandeurs périodiques de la journée et le courant général au voisinage de l'équateur.
    Notes: Zusammenfassung Das Windfeld bis ca. 2 km Höhe und seine kinematischen Größen: horziontale Divergenz und relative Vorticity werden als Merkmale des Land-Seewindsystems an einem tropischen Binnensee (Victoria-See: 0° bis 3° S) aus Pilotballonbeobachtungen bestimmt. Ein Zusammenhang zwischen diesen tagesperiodischen Größen und der allgemeinen Strömung in Äquatornähe wird diskutiert.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Climate dynamics 8 (1993), S. 161-175 
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Regional anomalies of the surface climate over Europe are defined by a simultanous EOF-analysis of the normalized monthly mean sea level pressure, temperature and precipitation fields of 100 winters (December–February, 1887–1986) at 40 stations. The monthly amplitudes of the first EOF (about 25% of the total variance) are used as an index for the monthly winter climate anomaly. They characterize a high (low) pressure cell over central Europe associated with a positive (negative) temperature and precipitation anomaly over northern (central-southern) Europe as indicated by a northward (southward) shift of the tail end of the cross-Atlantic cyclone track. These patterns resemble the phenomenological anticyclonic (cyclonic) Grosswetter classification and the European blocking (enhanced zonal flow) regime. The second EOF is of similar magnitude and gives latitudinal corrections to these two basic flow regimes. The joint probability distribution of both amplitudes shows a weak bimodality mainly associated with the first EOF. Further insight into the underlying physical processes of the climate anomaly patterns in Europe is obtained from the extended Eliassen-Palm flux diagnostics of the barotropic transient eddy-mean flow interaction (Hoskins et al. 1983) and the stationary wave propagation (Plumb 1985). The diagnostics confined to the barotropic components and applied to the regression and the composite anomaly fields of the transient and stationary eddy flows of the 500 hPa geopotential (1946–87, north of 20°N) leads to the following results: (1) The bandpass filtered transient eddy variances of the 500 hPa geopotential show a shift of the cross-Atlantic storm track: In high (low) pressure situations over Europe the cross-Atlantic storm track intensity is enhanced (reduced) and its tail end is shifted northward (remains zonal); the North Pacific storm track extends further (less) eastward and thus closer to the west coast of North America. (2) The extreme high pressure system over Europe tends to be supported by an anomalous transient eddy forcing of the mean flow stream-function: it enhances the zonal wind to its north and generates anticyclonic vorticity about 10° upstream from its center. In the low pressure composite the anomalous cyclonic vorticity is generated reducing the zonal flow to its north. (3) The occurrence (lack) of a strong eastward stationary wave activity flux over the Atlantic is associated with the high (low) pressure situations over Europe. Finally, a positive feedback is conjectured between the stationary wavetrain modifying the tail end of the cross-Atlantic storm track and the transient eddies intensifying this anomaly.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Boundary layer meteorology 12 (1977), S. 127-139 
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The equation of turbulent diffusion is solved for a vertical area source within the planetary boundary layer. The traditional Gaussian-plume approach is compared with the spectral solution of the diffusion equation used together with the barotropic boundary-layer model of Lettau and Dabberdt (1970). The results of the numerical computations are presented and the differences between the solutions are discussed.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We quantify the maximum possible influence of vegetation on the global climate by conducting two extreme climate model simulations: in a first simulation (‘desert world’), values representative of a desert are used for the land surface parameters for all non glaciated land regions. At the other extreme, a second simulation is performed (‘green planet’) in which values are used which are most beneficial for the biosphere's productivity. Land surface evapotranspiration more than triples in the presence of the ‘green planet’, land precipitation doubles (as a second order effect) and near surface temperatures are lower by as much as 8 K in the seasonal mean resulting from the increase in latent heat flux. The differences can be understood in terms of more absorbed radiation at the surface and increased recycling of water. Most of the increase in net surface radiation originates from less thermal radiative loss and not from increases in solar radiation which would be expected from the albedo change. To illustrate the differences in climatic character and what it would imply for the vegetation type, we use the Köppen climate classification. Both cases lead to similar classifications in the extra tropics and South America indicating that the character of the climate is not substantially altered in these regions. Fundamental changes occur over Africa, South Asia and Australia, where large regions are classified as arid (grassland/desert) climate in the ‘desert world’ simulation while classified as a forest climate in the ‘green planet’ simulation as a result of the strong influence of maximum vegetation on the climate. This implies that these regions are especially sensitive to biosphere-atmosphere interaction.
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 2004-01-21
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 10
    Publication Date: 2011-05-20
    Print ISSN: 0941-2948
    Electronic ISSN: 1610-1227
    Topics: Geography , Physics
    Published by Schweizerbart
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