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Imprint
Limitation of the CO2 sink strength of forests by ground-level ozone pollution as an intrinsic component of climate change - Validation of an ozone-uptake model and implementation in the physiological tree growth model 'BALANCE' for process-oriented risk assessment (KLIWAFOR)
Project
Project code: 28WC412601
Contract period: 01.04.2018
- 31.12.2020
Budget: 363,454 Euro
Purpose of research: Applied research
Keywords: forestry, climate (climate relevance, climate protection, climate change), forest growth, beech, mixed forest, forest conversion, risk management
The objective of the project is to determine for the first time the restriction of the carbon storage function of forests under elevated O3 regimes in order to present a risk assessment for Germany. For this purpose an ozone module is developed, validated and integrated into the process-oriented forest growth model 'BALANCE'. Modell simulations for different regions and climate scenarios form the basis for the development of forest-preventive adaptation measures. From the beginning the project development is accompanied by representatives from forest practice and administration. The model results are discussed and communicated to the practice to guarantee an effective risk management. Calibration and validation of the ozone module as part of the forest growth model 'BALANCE' are carried out based on the measurements of the site Kranzberger Forst (beech/spruce, Southern Germany). The module will be developed for individual trees in particular for the species beech, with the possibility to upscale on stand level. Synergies result from the use of extensive data material from previous projects as well as data newly generated at the site. Additional measurements are necessary to evaluate the difference of using leaf temperature instead of the air temperature for the determination of the water vapor pressure deficit, which is necessary to estimate the stomatal ozone uptake. To simulate realistic conditions concerning radiation and climate, phytotrons are available. Subsequently, the influence of leaf temperature is validated under canopy conditions and integrated in the ozone module. As a basis for the simulation study of forest growth and carbon sequestration different scenarios concerning stand structure, climate conditions, ozone concentrations and extreme events, representative 'virtually designed' forest sites are generated, exemplifying the most important forest regions of Germany. An important principle within the project is the interaction with representatives from forestry practice from the beginning of the project. Workshops accompany the model development and the modalities for scenario simulations. In this way realistic scenarios are generated and acceptance for the developed 'virtually designed' forest sites, for the model prototype and for the tools for practice can be assured.
Section overview
Subjects
- Silviculture
- Forestry
- Climate Change
