RoCliHom
RoCliHom overview
RoCliHom is Romania’s long-term homogenized climate dataset curated by the national meteorological service. It assembles monthly mean, maximum, and minimum temperature together with precipitation totals for 156 synoptic and climate stations covering 1901-2023. Homogenization removes discontinuities caused by station moves or instrumentation shifts, delivering consistent trends for every county.
What you can do on this page
- Inspect station-level series to verify local warming signals or precipitation shifts.
- Compare multiple locations, then export CSV snippets for offline modeling.
- Communicate extremes to stakeholders with shareable charts that highlight seasonal anomalies and decadal departures from the historical baseline.
Coverage and maintenance
The underlying collection is updated annually when the Romanian National Meteorological Administration releases refreshed quality-controlled records. Climate Explorer mirrors the official updates so analysts can start exploring shortly after publication. Metadata accompanying each station includes location, elevation, and quality flags to help interpret the context behind outliers.
Data source and code
- Data source: The primary input data consists of daily records extracted from the database of the National Meteorological Administration of Romania.
- Source code: Repository: https://github.com/alexdum/roclihom. Report issues or feature requests in the repository tracker.
Processing overview
Temperature data processing
- 1901-1960: The daily average temperature (Tavg) was calculated as the mean of three climatological observations taken at 06, 12, and 18 UTC. A Koeppen coefficient, determined based on the minimum temperature (Tmin) and the month of the year, was then applied.
- 1961-2023: The daily Tavg was calculated as the arithmetic average of four climatological observations recorded at 00, 06, 12, and 18 UTC.
Precipitation data processing
For the entire analysis period, daily precipitation (PREC) was calculated as the total accumulation from 18 UTC on the previous day to 18 UTC on the current day, with the timestamp marking the end of the 24-hour accumulation period.
Quality control and data homogenization
Quality control procedures, gap-filling, and homogenization were conducted using the methodology implemented in the Climatol software.
Trend analysis
Trends were assessed using the Theil-Sen nonparametric estimator, while significance levels were evaluated using the Mann-Kendall test, both of which were implemented via the EnvStats R package.
Further reading
The detailed methodology for this study is described in the manuscript “Long-term Homogenized Air Temperature and Precipitation Datasets in Romania, 1901-2023” by Dumitrescu et al. (2025), which has been published in the journal Scientific Data: https://www.nature.com/articles/s41597-025-05371-4.
Download references and citation
- Data stewardship: Romanian National Meteorological Administration (Administratia Nationala de Meteorologie).
- Suggested citation: “RoCliHom homogenized monthly station data accessed via Climate Explorer (https://climateexplorer.app/roclihom).”
- Regional context: cross-check anomalies with our GHCNm explorer to relate national and global changes.