READING, England, November 3, 2016 /PRNewswire/ -- One year after the Paris Agreement, the European Centre for Medium-Range Weather Forecasts (ECMWF) launches its most powerful global climate monitoring tool to date, ERA5. (Photo: http://photos.prnewswire.com/prnh/20161102/435664 ) (Photo: http://photos.prnewswire.com/prnh/20161102/435665 ) The publication of the first data from ERA5, representing a two-month period, marks a milestone for climate reanalysis at ECMWF. Produced by the EU-funded Copernicus Climate Change Service operated by ECMWF, this latest development in the ERA series improves on its predecessors through:
Offering a much improvedspatial resolution
Providinghourly estimates of atmospheric variables
Providinga consistent representation of uncertainties
Using more satellite observations
Giving access to all input observations
Global climate reanalysis provides critical resources for understanding and monitoring the processes associated with climate change, and for informing scenarios of future climate change. Reanalysis combines information from past and present meteorological observations with modern forecast models, using data assimilation techniques originally developed for numerical weather prediction. ERA5 provides a new numerical description of the recent climate and contains estimates of atmospheric parameters such as air temperature, pressure and wind at different altitudes, and surface parameters such as rainfall, soil moisture content and ocean wave height. The Head of the Copernicus Climate Change Service at ECMWF, Jean-Noël Thépaut, said: " With better use of observations,animproveddescription of physical processesanda considerably higher spatial and temporal resolution, ERA5 creates new global datasets to monitor climate change, for research,education, and for commercial applications. For the first time,users will have access to hourly estimatesof atmospheric variablesat a horizontal resolution of 31 km, and on 137 levels from the surface up to 1 Pa (around 80 km)." Another novelty of ERA5 is that it will produce a 10-member ensemble of climate reconstructions for all parameters and levels. This new feature is based on the Ensemble of Data Assimilations (EDA) system developed at ECMWF, which explicitly accounts for errors in the observations and in the forecast model. Users will be able to access data that will allow them to assess the confidence they can have in the analysis for various parameters, at different times and places.