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APPLICATION OF ERA5-LAND REANALYSIS DATA FOR THE STUDY OF PRECIPITATION REGIME IN UZBEKISTAN: STATISTICAL CHARACTERISTICS

Field of Science:Environmental Science (miscellaneous)Management, Monitoring, Policy and LawWater Science and TechnologyGeography, Planning and Development
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Hydrometeorology and environmental monitoring

Hydrometeorology and environmental monitoring

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This study presents a statistical assessment of the intra-annual precipitation regime over Uzbekistan using ERA5-Land reanalysis data and observations from 77 meteorological stations for the period 2005-2024. Daily precipitation data were aggregated into monthly totals, and a system of normalized relative coefficients combined with the cumulative distribution function (CDF) was applied to characterize intra-annual distribution features. The results demonstrate that the integral annual index reliably quantifies the degree of precipitation concentration or dispersion within a year. Lower index values correspond to precipitation concentrated within a few months, whereas higher values indicate a more evenly distributed and relatively stable regime. A comparison of CDFs derived from ground observations and ERA5-Land data shows that the reanalysis reproduces the general intra-annual distribution tendencies; however, certain discrepancies remain due to spatial-temporal smoothing effects and the influence of orographic and local convective processes.

AUTHORS

Science ID: DAN-0525-0018

Science ID: FFR-0525-0041

Science ID: MSN-0525-0125

Tags

# precipitation# coefficient# statistical# era5-land# reanalysis# regime# intra-annual# distribution# normalized# relative# cumulative# function# cdf# analysis# ground# observations# uzbekistan

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