Long-term spatiotemporal evaluation of CHIRPS satellite precipitation product over different climatic regions of Iran

Satellite precipitation products are important data sources in different spatial resolutions, time scales, and spatio-temporal coverage. In this study, the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) satellite precipitation product with a high spatial resolution (0.05°) is eva...

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Bibliographic Details
Published in:Theoretical and applied climatology 2021, Vol.143 (1-2), p.211-225
Main Authors: Ghozat, Ali, Sharafati, Ahmad, Hosseini, Seyed Abbas
Format: Article
Language:English
Subjects:
Annual precipitation
Aquatic Pollution
Aquatic resources
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Climate
Climate science
Climatology
Earth and Environmental Science
Earth Sciences
Environmental hazards
Ground stations
Management
Original Paper
Precipitation
Precipitation (Meteorology)
Regions
Satellites
Spatial discrimination
Spatial resolution
Time
Waste Water Technology
Water
Water Management
Water Pollution Control
Water resources
Water resources management
Weather stations
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Summary:Satellite precipitation products are important data sources in different spatial resolutions, time scales, and spatio-temporal coverage. In this study, the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) satellite precipitation product with a high spatial resolution (0.05°) is evaluated in the period of 1987 to 2017 over different climate regions of Iran. The accuracy of the satellite product is compared with the 68 ground-based meteorological stations over different time scales (i.e., daily, monthly, and annual) and precipitation classes. Results show that the performance of CHIRPS depends on the time scale, precipitation depth, and climate type. The best performance of the product (CC = 0.80, FRMSE = 0.57, NSE = 0.63) across the country is observed in the annual time scale, while the monthly product offers the best performance in the regional scale. The product provides inadequate performance (CC = 0.34, FRMSE = 5.72, NSE = − 0.2) in daily time scale across the country and most of the climatic regions. The product is found to be most accurate in the south and southwest of the country, while the lowest performance is observed over the Caspian coast. The CHIRPS satellite provides the best performance in detection of no/tiny precipitation (POD > 0.90) and the worst performance in light and low, moderate precipitation (POD 
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-020-03428-5