Study areas are the areas for which there will be data collected and analysed in the project, primarily selected Austrian ICP Forests sites. Ten trees at each location have automatic dendrometers installed. About twice a month, manual measurements of tree diameter are made. Local climate information is accessible at the six ICP-Forests core plots. This covers the stand climate (temperature, relative humidity, wind speed, wind direction, solar radiation, precipitation, and soil temperature and moisture at various depths) as well as the open land climate conditions (temperature, relative humidity, wind speed, wind direction, and other factors) close to the stand weather station. Additionally, data on the Leaf-Area-Index (annually), soil temperature, soil moisture, and chemical soil solution analysis (about every 14 days) are all readily available.