this dataset provides water variables and indicators based on hydrological impact modelling forced by bias adjusted regional climate simulations from the european coordinated regional climate downscaling experiment euro-cordex the dataset contains essential climate variable ecv data in the form of daily mean river discharge and a set of climate impact indicators ciis for both water quantity and quality ecv datasets provide the empirical evidence needed to understand the current climate and predict future changes ciis contain condensed climate information which facilitate relatively quick and efficient subsequent analysis therefore ciis make climate information accessible to application focussed users within a sector the ecvs and ciis provided here were derived within the water management sectoral information service to address questions specific to the water sector however the products are provided in a generic form and are relevant for a range of sectors for example agriculture and energy the data represent the current state-of-the-art in europe for regional climate and hydrological modelling and indicator production eight bias adjusted model simulations from the euro-cordex eur-11 were used to force a multi-model setup of the hydrological model e-hypecatch at a pan-european domain a total of 18 water quality and quantity ciis and 1 water ecv are provided in this dataset at catchment scale and on a 5km x 5km grid the ciis are provided as mean values over a 30-year time period for the reference period 1971-2000 data is provided as absolute values for the future periods the data is provided as absolute values and as the relative or absolute change from the reference period the future periods cover 3 fixed time periods 2011-2040 2041-2070 and 2071-2100 and 3 "degree scenario" periods defined by when global warming exceeds a given threshold 1 5 °c 2 0 °c and 3 0 °c the global warming is calculated from the global climate model gcm used therefore the actual time period of the degree scenarios will be different for each gcm the river discharge ecv data meet the technical specification set by the global climate observing system gcos as such they are provided on a daily time step note these are model output data not observation data as is the general case for ecvs this dataset is produced and quality assured by the swedish meteorological and hydrological institute on behalf of the copernicus climate change service main variables: aridity actual: description: aridity actual is calculated as the monthly mean values of the ratio between actual evapotranspiration and precipitation over a 30 year period actual evapotranspiration is the modelled evapotranspiration computed only with available water for future periods the indicator is given as a relative change against the reference period 1971-2000 units: dimensionless aridity potential: description: aridity potential is calculated as the monthly mean values of the ratio between potential evapotranspiration and precipitation over a 30 year period potential evapotranspiration is the modelled evapotranspiration when there is abundant water for future periods the indicator is given as a relative change against the reference period 1971-2000 units: dimensionless flood recurrence: description: return values of annual maximum river discharge data are provided as the 2 5 10 and 50 year return period of annual daily maximum river discharge estimated using a gumbel distribution for future periods the indicator is given as a relative change against the reference period 1971-2000 units: m³ s^-1 maximum river discharge: description: maximum river discharge is calculated as the mean annual daily maximum discharge over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: m³ s^-1 mean runoff: description: ' runoff is defined as the sum of surface and subsurface runoff to streams for each grid cell or catchment the indicator is calculated as the monthly or annual mean values of daily runoff averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 ' units: mm month^-1 mean soil moisture: description: soil moisture is the water stored in the soil and is affected by precipitation temperature soil characteristics and more the soil moisture is defined slightly differently in different hydrological models and is here generally defined as soil moisture in the root zone as fraction of the field capacity volume data are provided as monthly or annual mean values averaged over a 30 years period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: dimensionless minimum river discharge: description: minimum river discharge is calculated as the mean annual daily minimum discharge over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: m³ s^-1 river discharge: description: ' volume rate of water flow that is transported through a given cross-sectional area it is synonymous to streamflow the essential climate variable ecv data are provided at daily resolution the climate impact indicator cii of river discharge is calculated as the monthly or annual mean values of daily runoff averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 ' units: m³ s^-1 total nitrogen concentration in catchments: description: nitrogen concentration is the mass of nitrogen divided by the volume of water the indicator is calculated as the monthly or annual mean values of total nitrogen concentration from a catchment averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: mg l^-1 total nitrogen concentration in local streams: description: nitrogen concentration is the mass of nitrogen divided by the volume of water the indicator is calculated as the monthly or annual mean values of total nitrogen concentration from a local stream averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: mg l^-1 total nitrogen load in catchments: description: nitrogen load is the product of the river discharge volume and the nitrogen concentrations the indicator is calculated as the annual kg/year or monthly kg/month mean values of total nitrogen load from a catchment averaged over of a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: 'kg year^-1 kg month^-1' total phosphorus concentration in catchments: description: phosphorus concentration is the mass of phosphorus divided by the volume of water the indicator is calculated as the monthly or annual mean values of total phosphorus concentration from a catchment averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: mg l^-1 total phosphorus concentration in local streams: description: phosphorus concentration is the mass of phosphorus divided by the volume of water the indicator is calculated as the monthly or annual mean values of total phosphorus concentration from a local stream averaged over a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: mg l^-1 total phosphorus load in catchments: description: phosphorus load is the product of the river discharge volume and the phosphorus concentrations the indicator is calculated as the annual kg/year or monthly kg/month mean values of total phosphorus load from a catchment averaged over of a 30 year period for future periods the indicator is given as a relative change against the reference period 1971-2000 units: 'kg year^-^1 kg month^-1' water temperature in catchments: description: water temperature is the simulated water temperature in a catchment the indicator is calculated as mean annual values of water temperature for a 30 years period for future periods the indicator is given as an absolute change against the reference period 1971-2000 units: ^oc water temperature in local streams: description: water temperature is the simulated water temperature in local streams the indicator is calculated as mean annual values of water temperature for a 30 years period for future periods the indicator is given as an absolute change against the reference period 1971-2000 units: ^oc wetness actual: description: wetness actual is calculated as the monthly mean values of precipitation minus actual evapotranspiration averaged over a 30 year period for future periods the indicator is given as an absolute change against the reference period 1971-2000 units: mm month^-1 wetness potential: description: wetness potential is calculated as the monthly mean values of precipitation minus potential evapotranspiration averaged over a 30 year period for future periods the indicator is given as an absolute change against the reference period 1971-2000 units: mm month^-1