Clima Storico — Precipitazioni Totali

Microclimatevv0

Responsible:Niccolò Calandri

Historical Climate — Total Precipitation

Overview

The Historical Climate — Total Precipitation indicator shows the historical time series of total daily precipitation (rainfall + snowmelt), based on ERA5/ERA5-Land reanalysis data. Precipitation is a primary determinant of soil water availability and plant growth, directly conditioning flowering phenology, nectar production, and pollen quality. Analysis of historical precipitation trends enables the identification of prolonged drought periods and intense rainfall events, critical for assessing soil erosion risk, aquifer recharge dynamics, and ecosystem stability.

Calculation Methodology

Data are sourced from the Open-Meteo Historical Weather API, which provides ERA5/ERA5-Land reanalysis data from 1940 to the present at approximately 10 km resolution. The variable used is precipitation_sum (total daily precipitation in mm). Data are interpolated to the geographic position of the site.

Data Sources

Code	Name	Provider	Type	Coverage	Availability
`WRD_OPNMT_99`	Open-Meteo Historical Weather API	Open-Meteo	db	Global	1940–present

References

Hersbach, H. et al. (2020). "The ERA5 global reanalysis". Quarterly Journal of the Royal Meteorological Society, 146(730), 1999-2049. DOI: 10.1002/qj.3803
Muñoz-Sabater, J. et al. (2021). "ERA5-Land: A state-of-the-art global reanalysis dataset for land applications". Earth System Science Data, 13, 4349-4383.
Open-Meteo Historical Weather API

Data Sources & References

Sources

WRD_OPNMT_99

Methodology

Historical series of total daily precipitation (rain + snow) based on ERA5 reanalysis. Open-Meteo variable: precipitation_sum. Source: Open-Meteo Historical Weather API. Unit: mm.