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Water and energy cycling between croplands and the atmosphere: Field studies and integrated climate simulations on the convection-permitting scale
Project
Project code: DFG FOR 1695
Contract period: 01.06.2012
- 30.05.2015
Purpose of research: Basic research
An integrated atmosphere-land surface-crop model (WRF-NOAH-GECROS) system for simulating regional climate and feedback processes on the convection-permitting scale will be developed. For this purpose, the crop growth model GECROS will be integrated in the WRF-NOAH model. The WRF-NOAH model will be optimised with respect to the representation of orographic, atmospheric, and land surface exchange processes. The objective is an improved simulation of water and energy cycling between croplands, atmospheric boundary layer (ABL) and the free atmosphere. The WRF-NOAH-GECROS model system will be verified with respect to observations in the period 1990–2014. Advances in the representation of land surface exchange and crop growth dynamics will be based on extensive field measurements. Particularly, a synergy between eddy covariance stations and novel 3D water-vapour and temperature lidar systems will be operated. Their data will be extensively applied for improving the calibration of parameters and the parameterisation of turbulent fluxes in WRF-NOAH-GECROS as well as for closing the surface energy balance. This will enable us to study the subtle feedback chain between changes of soil moisture and crop properties, atmospheric boundary layer and cloud properties as well as the amount and distribution of precipitation from the field scale to SW-Germany. Not only temperature and precipitation trends but also extreme events such as more frequent summer heat wave periods will be simulated and verified. The model system will also be prepared for coupling with a Multi-Agent land-use model.
Section overview
Subjects
- Agricultural Meteorology
- Climate Change
