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Dr. Ralf Kiese
Head of Research Group Excosystem Matter Fluxes

PD Dr. Ralf Kiese

Chamber-based NEE measurements
Light Chamber

robotized chamber-based NEE measurements

TERENO: Terrestrial Environmental Observatories
Robotized chamber system in Rottenbuch

TERENO: Terrestrial Environmental Observatories

Research Group: Ecosystem Matter Fluxes

Research Scope
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The work focuses on the detailed analyses and quantification of C and N matter fluxes in natural, semi-natural and agricultural ecosystems being sensitive to changes in climate, land use and management and their exchange of matter with the adjacent compartments atmosphere and hydrosphere. Special emphasis is given to long-term observation of environmental parameters and cross-compartment fluxes of e.g. trace gases, nitrate, DOC in order to get resilient datasets for documenting and understanding of global change effects on bio-geo-chemical nutrient cycling in the terrestrial biosphere. The activities comprise the establishment and operation of long-term measuring stations and project based field sites as well as laboratory process studies for the determination of C and N turnover processes and associated exchange of environmentally important trace substances between the biosphere-atmosphere (CO2, CH4, N2O, N2, NO, NO2) and -hydrosphere (DOC, DON, DIC, DON) applying state of the art measuring techniques. Datasets are used for further development and testing of bio-geo-chemical models.

Research Group: Ecosystem Matter Fluxes

Research scope
Temperate Forest
Impact of forest management
Boreal Forest
Drained, afforested peatland

THESE PICTURES CAN BE REPLACED

The work focuses on the detailed analyses and quantification of C and N matter fluxes in natural, semi-natural and agricultural ecosystems being sensitive to changes in climate, land use and management and their exchange of matter with the adjacent compartments atmosphere and hydrosphere. Special emphasis is given to long-term observation of environmental parameters and cross-compartment fluxes of e.g. trace gases, nitrate, DOC in order to get resilient datasets for documenting and understanding of global change effects on bio-geo-chemical nutrient cycling in the terrestrial biosphere. The activities comprise the establishment and operation of long-term measuring stations and project based field sites as well as laboratory process studies for the determination of C and N turnover processes and associated exchange of environmentally important trace substances between the biosphere-atmosphere (CO2, CH4, N2O, N2, NO, NO2) and -hydrosphere (DOC, DON, DIC, DON) applying state of the art measuring techniques. Datasets are used for further development and testing of bio-geo-chemical models.  


Biosphere: Process Studies

Process Studies

The work focuses on the microbial and plant biological processes and key populations involved in N and C cycling, exchange and storage, and how they are affected by Global Change. The work includes the formation processes of biogenic volatile organic compounds (BVOC), the microbial N and C transformations, the regulation of these processes in dependence of biotic and abiotic environmental factors, and their role in the interactions between the biosphere and atmosphere.

The work encompasses the molecular and biochemical characterization of C and N metabolic pathways, and the highly complex inter- and intraspecific interactions, e.g. between microorganisms and plants, with respect to their co-action within the C and N cycles and, thus, for ecosystem stability and functioning. For this challenge, state-of-the-art methods in molecular biology (e.g. microarrays, genetically modified organisms), stable isotope techniques and mass spectrometry (e.g., LC-IRMS, PTR-MS) are applied.

 

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Biosphere: Field Studies

Field Studies
Field Studies

The work focuses on the detailed analyses and quantification of C and N matter fluxes in natural ecosystems sensitive to changes in climate, land use and management and their exchange of matter with the adjacent compartments atmosphere and pedosphere. Special emphasis is given to long-term observation of environmental parameters in order to get resilient datasets for evaluating Global Change effects on the terrestrial biosphere.

 

The activities comprise

  • the establishment and operation of longterm measuring stations and satellite sites for the determination of the exchange of environmentally important trace substances (CO2, CH4, VOC, N2O, N2, NO, NO2) between the pedo-, phyllo- and atmosphere with high temporal and spatial resolution applying chamber and micrometeorological techniques and
  • the development/improvement of innovative measuring techniques for the quantification of ecosystem C and N transformations/-fluxes.

 

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Biosphere: Process Modelling

Scheme Process Modelling
Scheme Process Modelling
Modelling N2O emissions
Modelling N2O emission

The activities concentrate on the development and validation of process-oriented numerical models for the simulation of the coupled ecosystem C and N transformations, the C and N storage and of the C and N exchange between terrestrial ecosystems and the atmosphere and hydrosphere on the basis of the results obtained from the process and field studies. By coupling to geographical information systems the models are applied to

  • calculate emission/deposition inventories of environmentally important trace substances, by which the reliability of global and regional climate predictions is improved and a contribution is made to the Kyoto process, and
  • provide decision support for adaptation and prevention strategies with regard to greenhouse gas balances and sustainable use of the biosphere, in particular of ecosystems sensitive to changes in climate and use/management (forests, grasslands, savannas, wetlands).

 

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