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  • 1
    Series available for loan
    Series available for loan
    Simulation of the global bio-geophysical interactions during the last glacial maximum (1998)
    Potsdam : PIK
    Associated volumes
    Details Availability
    Call number: ZS-190(34) ; ZSP-625-34
    In: PIK report
    Type of Medium: Series available for loan
    Pages: 27 S. , graph. Darst.
    Series Statement: PIK report 34
    Location: Lower compact magazine
    Location: Lower compact magazine
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Modeling bio-geophysical feedback in the sahel (1995)
    Hamburg : Max-Planck-Institut für Meteorologie
    Associated volumes
    Details Availability
    Call number: ZSP-686-163
    In: Report
    Type of Medium: Monograph available for loan
    Pages: 26 S. : graph. Darst. : 29,5 cm
    ISSN: 0937-1060
    Series Statement: Report / Max-Planck-Institut für Meteorologie 163
    Branch Library: GFZ Library
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  • 3
    Electronic Resource
    Electronic Resource
    On multiple solutions of the atmosphere–vegetation system in present-day climate (1998)
    Oxford, UK : Blackwell Science Ltd
    Global change biology 4 (1998), S. 0 
    Details
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: An asynchronously coupled global atmosphere–biome model is used to assess the stability of the atmosphere–vegetation system under present-day conditions of solar irradiation and sea-surface temperatures. When initialized with different land-surface conditions (1, the continents, except for regions of inland ice, completely covered with forest; 2, with grassland; 3, with (dark) desert; and 4, with (bright) sand desert), the atmosphere–biome model finds two equilibrium solutions: the first solution yields the present-day distribution of subtropical deserts, the second reveals a moister climate in North Africa and Central East Asia and thereby a northward shift of vegetation particularly in the south-western Sahara. The first solution is obtained with initial condition 4, and the second with 1, 2, 3. When comparing these results with an earlier study of biogeophysical feedback in the African and Asian monsoon area, it can be concluded that North Africa is probably the region on Earth which is most sensitive considering bifurcations of the atmosphere–vegetation system at the global scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2486.1998.t01-1-00122.x
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  • 4
    Electronic Resource
    Electronic Resource
    Simulation of modern and glacial climates with a coupled global model of intermediate complexity (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 351-356 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A global coupled ocean–atmosphere model of intermediate complexity is used to simulate the equilibrium climate of both today and the Last Glacial Maximum, around 21,000 years ago. The model successfully predicts the atmospheric and oceanic circulations, temperature distribution, hydrological ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/34839
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  • 5
    Electronic Resource
    Electronic Resource
    Variability of global biome patterns as a function of initial and boundary conditions in a climate model (1996)
    Springer
    Climate dynamics 12 (1996), S. 371-379 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The use of one-way coupling of an equilibrium-response vegetation, or biome, model with atmospheric circulation models is critically assessed. Global biome patterns from various, equally likely numerical realisations of present-day climate are compared. It has been found that the changes in global biome patterns to be expected from interdecadal variability in the atmosphere affect 9–12% of the continental surface (Antarctica excluded). There is no unique difference pattern, although changes are mainly induced by the variability of annual moisture availability and, to a lesser extent, by winter temperatures. This variability of biome patterns reflects the uncertainty in the estimate of equilibrium vegetation patterns from finite time interval climatologies. Changes in biome distributions between present-day climate and anomaly climate, the latter induced by an increase in sea-surface temperatures and atmospheric CO2, are larger than and different in kind from the changes due to interdecadal variability. Roughly 30% of the land surface is affected by these changes. It appears that the strongest and most significant signal is seen for boreal biomes which can be attributed to an increase in near surface temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00211683
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  • 6
    Electronic Resource
    Electronic Resource
    Variability of global biome patterns as a function of initial and boundary conditions in a climate model (1996)
    Springer
    Climate dynamics 12 (1996), S. 371-379 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract. The use of one-way coupling of an equilibrium-response vegetation, or biome, model with atmospheric circulation models is critically assessed. Global biome patterns from various, equally likely numerical realisations of present-day climate are compared. It has been found that the changes in global biome patterns to be expected from interdecadal variability in the atmosphere affect 9–12% of the continental surface (Antarctica excluded). There is no unique difference pattern, although changes are mainly induced by the variability of annual moisture availability and, to a lesser extent, by winter temperatures. This variability of biome patterns reflects the uncertainty in the estimate of equilibrium vegetation patterns from finite time interval climatologies. Changes in biome distributions between present-day climate and anomaly climate, the latter induced by an increase in sea-surface temperatures and atmospheric CO2, are larger than and different in kind from the changes due to inderdecadal variability. Roughly 30% of the land surface is affected by these changes. It appears that the strongest and most significant signal is seen for boreal biomes which can be attributed to an increase in near surface temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003820050114
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  • 7
    Electronic Resource
    Electronic Resource
    The impact of sub-grid scale sea-ice inhomogeneities on the performance of the atmospheric general circulation model ECHAM3 (1996)
    Springer
    Climate dynamics 12 (1996), S. 477-496 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract. Leads and polynyas have a great impact on the energy budget of the polar ocean and atmosphere. Since atmospheric general circulation models are not able to resolve the spatial scales of these inhomogeneities, it is necessary to include the effect of fractional sub-grid scale sea-ice inhomogeneities on climate by a suitable parametrization. In order to do this we have divided each model grid-cell into an ice-covered and an ice-free part. Nevertheless, a numerical model requires effective transports representative for the whole grid-box. A simple procedure would be to use grid averages of the surface parameters for the calculation of the surface fluxes. However, as the surface fluxes are non-linearly dependent on the surface properties, the fluxes over ice and open water should be calculated separately according to the individual surface-layer structure of each surface type. Then these local fluxes should be averaged to obtain representative fluxes. Sensitivity experiments with the Hamburg atmospheric general circulation model ECHAM3 clearly show that a subgrid scale distribution of sea ice is a dominant factor controlling the exchange processes between ocean and atmosphere in the Arctic. The heat and water vapour transports are strongly enhanced leading to a significant warming and moistening of the polar troposphere. This affects the atmospheric circulation in high- and mid-latitudes; e.g. the stationary lows are modified and the transient cyclonic activity over the subpolar oceans is reduced. A pronounced impact of sub-grid scale sea-ice distribution on the model climate can only be obtained when the non-linear behaviour of the surface exchange processes is considered by a proper, physically based, averaging of the surface fluxes. A simple linear averaging of surface parameters is not sufficient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003820050122
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  • 8
    Electronic Resource
    Electronic Resource
    A new model for climate system analysis: Outline of the model and application to palaeoclimate simulations (1999)
    Springer
    Environmental modeling and assessment 4 (1999), S. 209-216 
    Details
    ISSN: 1573-2967
    Keywords: climate modelling ; climate system ; system analysis ; climate system modelling ; Earth system modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We present a new reduced-form model for climate system analysis. This model, called CLIMBER-2 (for CLIMate and BiosphERe, level 2), fills the current gap between simple, highly parameterized climate models and computationally expensive coupled models of global atmospheric and oceanic circulation. We outline the basic assumptions implicit in CLIMBER-2 and we present examples of climate system analysis including a study of atmosphere–ocean interaction during the last glacial maximum, an analysis of synergism between various components of the climate system during the mid-Holocene around 6000 years ago, and a transient simulation of climate change during the last 8000 years. These studies demonstrate the feasibility of a computationally efficient analysis of climate system dynamics which is a prerequisite for future climate impact research and, more generally, Earth system analysis, i.e., the analysis of feedbacks between our environment and human activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019016418068
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  • 9
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    Landscape variability and surface flux parameterization in climate models (1995)
    Elsevier
    Details
    Publication Date: 1995-03-01
    Print ISSN: 0168-1923
    Electronic ISSN: 1873-2240
    Topics: Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Physics
    Published by Elsevier
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  • 10
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    Simulation of modern and glacial climates with a coupled global model of intermediate complexity (1998)
    Springer Nature
    Details
    Publication Date: 1998-01-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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