Earth Syst. Sci. Data, 13, 2801–2818, 2021 https://doi.org/10.5194/essd-13-2801-2021 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. A high-resolution gridded dataset of daily temperature and precipitation records (1980–2018) for Trentino-South Tyrol (north-eastern Italian Alps) Alice Crespi1, Michael Matiu1, Giacomo Bertoldi2, Marcello Petitta1,3, and Marc Zebisch1 1Institute for Earth Observation, Eurac Research, Bolzano, 39100, Italy 2Institute for Alpine Environment, Eurac Research, Bolzano, 39100, Italy 3SSPT-MET-CLIM, ENEA, Rome, 00196, Italy Correspondence: Alice Crespi (
[email protected]) Received: 12 November 2020 – Discussion started: 12 January 2021 Revised: 3 May 2021 – Accepted: 12 May 2021 – Published: 16 June 2021 Abstract. A high-resolution gridded dataset of daily mean temperature and precipitation series spanning the pe- riod 1980–2018 was built for Trentino-South Tyrol, a mountainous region in north-eastern Italy, starting from an archive of observation series from more than 200 meteorological stations and covering the regional domain and surrounding countries. The original station data underwent a processing chain including quality and consistency checks, homogeneity tests, with the homogenization of the most relevant breaks in the series, and a filling proce- dure of daily gaps aiming at maximizing the data availability. Using the processed database, an anomaly-based interpolation scheme was applied to project the daily station observations of mean temperature and precipitation onto a regular grid of 250 m × 250 m resolution. The accuracy of the resulting dataset was evaluated by leave- one-out station cross-validation. Averaged over all sites, interpolated daily temperature and precipitation show no bias, with a mean absolute error (MAE) of about 1.5 ◦C and 1.1 mm and a mean correlation of 0.97 and 0.91, respectively.