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POSSIBILITIES OF USING AIR TEMPERATURE DATA FROM NASA POWER AND ERA5 BASES IN UZBEKISTAN

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Hydrometeorology and environmental monitoring

Hydrometeorology and environmental monitoring

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ARTICLE ANNOTATION

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The article analyzes the results of comparison (verification) of air temperature values obtained from the NASA POWER and ERA5 databases for the period 2000-2022, with eight-time hourly observation data at 77 meteorological stations of Uzbekistan for the same period. To determine the influence of the height of the observation point on the verification results, meteorological stations were divided into 4 groups, depending on their height relative to sea level (h<500 m, 500 m1000 m). As a result of the study, it was found that the ERA5 database data in areas with altitudes h<500 m and h<1000 m are closer to ground-based observation data than NASA POWER data. The relative errors between hourly, daily and monthly air temperature data from the ERA5 base and ground-based observation data in areas below 500 m above sea level are 1.44-4.55%. In areas with an altitude of up to 1000 m for the values of hourly observations they are 4.0-5.0%, and for daily and monthly average, maximum and minimum values they are in the range of 0.47-5.55%. For monthly temperature values, the best agreement (relative error 0.47-1.02%) was found at stations located at altitudes from 500 to 1000 m (2nd group). However, the errors in daily temperature values for stations of this altitude group increase to 10.94-24.73%. At meteorological stations located above 1000 m, both databases have close to each other with large errors compared to ground data. Based on the obtained results, we can recommend the use of ERA5 reanalysis data for altitudes up to 1000 m when studying the air temperature regime in the territory of Uzbekistan. For territories located above 1000 m, reanalysis data reflect general patterns of change, and when using them, it is necessary to make corrections to the obtained analysis results.

AUTHORS

B.Xolmatjanov

Национальный университет Узбекистана имени Мирзо Улугбека

F.Abdikulov

Национальный университет Узбекистана имени Мирзо Улугбека

S.Begmatov

Научно-исследовательский гидрометеорологический институт

E.Rahimov

Национальный научно-исследовательский институт возобновляемых источников энергии

B.Omonov

Национальный научно-исследовательский институт возобновляемых источников энергии

I.Mahmudov

Научно-исследовательский гидрометеорологический институт

Tags

# ҳаво ҳарорати# температура воздуха# метеорологическая станция# air temperature# NASA POWER# meteorological station# реанализ# reanalysis# ERA5# метеорология станцияси# верификация.# verification.

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Article Identifiers

ROI:

https://eroi.uz/11.0191/A0624-0032

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Not Available

References

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Электрон манбалар: National Aeronautics and Space Administration Goddard Institute for Space Studies. URL: https://data.giss.nasa.gov/gistemp/

Disputes about global warming – Global warming controversy. URL: https://ru.abcdef.wiki/wiki/Global_warming_controversy

NASA Prediction of Worldwide Energy Resources. URL: https://power.larc.nasa.gov/

Welcome to the Climate Data Store. URL: https://cds.climate.copernicus.eu/cdsapp#!/home