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The Model
The LPJmL Dynamic Global Vegetation Model DGVM simulates vegetation composition and distribution as well as stocks and land-atmosphere exchange flows of carbon and water, for both natural and agricultural ecosystems. Using a combination of ecophysiological relations, generalized empirically established functions and plant trait parameters, it computes processes such as vegetation establishment and structure, photosynthesis, plant growth, maintenance and regeneration losses, fire disturbance, soil moisture, runoff, evapotranspiration, and irrigation. The monthly or daily input data are spatially explicit time series (typically 67,420 global 0.5 degree grid cells) of precipitation, air temperature and cloudiness, as well as data on the distribution of agricultural vegetation types, soil parameters, river flow directions, and distribution of lakes and reservoirs. Grid cells may contain mosaics of one or several types of natural or agricultural vegetation. The model also simulates the production of woody and herbaceous short-rotation bio-energy plantations. LPJmL is being jointly developed and maintained by Research Domains 1 and 2 of the Potsdam Institute for Climate Impact Research (PIK).