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Iberia01: A new gridded dataset of daily precipitation and temperatures over Iberia

AuthorsHerrera, S. ; Cardoso, Rita M.; Matos Soares, Pedro; Espírito-Santo, Fátima; Viterbo, Pedro; Gutiérrez, José M.
Issue Date2019
PublisherCopernicus Publications
CitationEarth System Science Data 11: 1947-1956 (2019)
AbstractThe present work presents a new observational gridded dataset (referred to as Iberia01) for daily precipitation and temperatures produced using a dense network (thousands) of stations over the Iberian Peninsula for the period 1971-2015 at 0.1° regular (and 0.11° CORDEX-compliant rotated) resolutions. We analyze mean and extreme indices and compare the results with the E-OBS v17 dataset (using both the standard and ensemble versions, at 0.25 and 0.1° resolutions, respectively), in order to assess observational uncertainty in this region. We show that Iberia01 produces more realistic precipitation patterns than E-OBS for the mean and extreme indices considered, although both are comparable for temperatures. To assess the differences between these datasets, a new probabilistic intercomparison analysis was performed, using the E-OBS ensemble (v17e) to characterize observational uncertainty and testing whether Iberia01 falls within the observational uncertainty range provided by E-OBS. In general, uncertainty values are large in the whole territory, with the exception of a number of kernels where the uncertainty is small, corresponding to the stations used to build the E-OBS grid. For precipitation, significant differences-at the 10% level-between both datasets were found for fewer than 25% of days over the Iberian Peninsula. For temperature, a very inhomogeneous spatial pattern was obtained, with either a small (in most of the regions) or large fraction of significantly different days, thus indicating sensible regions for observational uncertainty.
Publisher version (URL)https://doi.org/10.5194/essd-11-1947-2019
Identifiersdoi: 10.5194/essd-11-1947-2019
e-issn: 1866-3516
issn: 1866-3508
Appears in Collections:(IFCA) Artículos
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