Index of /MEDSCOPE/downscaling

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	mfS6/	2020-05-20 12:47	-

Downscaled seasonal forecasts at 25 km over the Mediterranean region

Daily surface air temperature and total precipitation

• Format: NetCDF
• Years: Since 1993-2016 (hindcast) 2016-2018 (forecast)
• Original data source: Copernicus Climate Data Store (Documentation)
• Seasonal forecast systems: ECMWF System 5, MeteoFrance System 6
• Original spatial / temporal resolution: 1° x 1° Lonlat / daily
• Output spatial / temporal resolution: 0.25° x 0.25° Lonlat / daily
• Domain: (11°W,40°E; 20°N, 52.5°N)
• Postprocessed by: Silvia Terzago, Giulio Bongiovanni - CNR-ISAC

Available variables and units:

• prlr:
  • daily total precipitation
  • units = "m/s" (ECMWFS5); "m" (MFS6)
• tas:
  • daily near-surface air temperature
  • units = "K"

Methods

• The original forecasts have been bias-adjusted by applying a quantile mapping method (Gudmundsson et al., 2011) on a monthly basis. ERA5 reanalysis at 0.25° upscaled at the same resolution as the seasonal forecast data, i.e. 1°, was employed as a reference dataset.

• The temperature downscaling exploits information from a reference fine-scale temperature climatology (ERA5 at 0.25° resolution). The coarse-scale data are remapped to the target grid and adjusted pixel-by-pixel by an additive constant so that the resulting fine-scale climatology is identical to the reference climatology.

• The precipitation downscaling is performed with the orographic RainFARM method (D'Onofrio et al., 2014, Terzago et al., 2018)

• The data processing has been performed using the CSTools R package (Perez-Zanon et al., 2020)

Documentation

• Methods to generate the dataset:Technical Report
• MEDSCOPE project website