Within the UERRA project (2014-2017) a surface re-analysis at 5.5km resolution has been produced over Europe for the period 1961-2015 (UERRA D2.8 https://www.uerra.eu) with the so-called MESCAN-SURFEX system. During the Copernicus Climate Change Service C3S_322_lot1 contract (2018-2021), the period 2016-2019 has been produced with exactly the same system.
Since the data are available on the Climate Data Store, several impact studies or local comparisons have been published for different types of applications: precipitation studies (Bezak et al., 2020 and 2021), temperature studies (Chervenkov et al., 2021, Hofer and Horak, 2020) or for snow indicators (Morin et al., 2021). User feedback, depending of the variables and/or the study area, can be very positive or highlight some questions or some weaknesses of the product. In May 2020, a user shows some “curious” trends for the temperature of 3 European cities (Budapest, Riga and Warsaw). After several months of investigation, the problem was fixed and it was decided to re-run the surface analysis MESCAN and the off-line land surface model SURFEX for the period 1961-2019 to produce version 2 of this re-analysis, named UERRA-Land2.
After a brief description of the problem discovered in May 2020, the modification of the surface analysis will be explained and the impact on several variables such as temperature and snow depth will be presented. A comparison with ERA5-Land and the added value of the regional re-analysis UERRA-Land2 will be discussed.
The UERRA-Land2 dataset is now available on demand at Météo-France and hopefully soon on the Climate Data Store.
How to cite: Bazile, E., Verrelle, A., Glinton, M., and Le Moigne, P.: A new version of the European surface reanalysis UERRA-Land2 at 5.5km for the period 1961-2019, EMS Annual Meeting 2022, Bonn, Germany, 5–9 Sep 2022, EMS2022-578, https://doi.org/10.5194/ems2022-578, 2022.
