Tereno: A Network of Terrestrial Environmental Observatories and Data Platforms.

In 2008, a network of terrestrial environmental observatories was established in Germany comprising four distinct regions in Germany sensitive to climate changes. The objective of TERENO is to collect long term data of all compartments in the terrestrial system, to study feedbacks between the soil-plant-atmosphere system, to develop and deploy new measurement technologies in combination with remote sensing. The collected data are being made available to the science community through the TERENO data portal (www.tereno.net) and used in data assimilation approaches to predict the hydrologic and biogeochemical states and fluxes of the terrestrial system. With TERENO, a network of 132 fully automated weighable lysimeter systems was installed in 2010 and it became operational in 2011. In 2013, several TERENO locations became part of the ICOS-Germany network focusing on observing greenhouse gas emissions for a period up to 25 years. Within the individual TERENO observatories, different in-situ sensors provide information on various physical parameters like soil moisture, temperatures, ground water levels or gas fluxes. For the Eifel/Lower Rhine observatory this adds up to about 2,500,000 data values being measured per day. A time series management system (TSM 2.2) was developed to process and store the data into a relational database system using a comprehensive observation data model providing all relevant meta information and information concerning data collection, data import and data publication are stored properly. In order to facilitate the acquisition, provision, integration, management and exchange of heterogeneous geospatial resources within a scientific and non-scientific multiuser (distributed) environment the distributed spatial data infrastructure TEODOOR (TEreno Online Data RepOsitORry) has been build-up. Independent local data infrastructures are connected by standardized Web-services, which supply standards and interfaces to search for and access to spatial data. The central TERENO data portal allows to discover and access all data and metadata from the different observatories in a standardized way, brings together the data collected and published via OGC Web-services from the individual observatories and provides access of the data to the public. Services. In this presentation we will present the actual status of TERENO, the availability and accessibility of data based on TERENO data policy and the TEODOOR portal and the procedures established to perform quality assessment and control.