Comparison of total cloud cover (ERA-Interim) and precipitation (GPCC) over Mongolia and southern part of Eastern Siberia in July

Elena V. Devyatova; Olga Yu. Antokhina; Pavel N. Antokhin; Vladimir I. Mordvinov; Inna V. Latysheva

doi:10.1117/12.2538640

18 December 2019 Comparison of total cloud cover (ERA-Interim) and precipitation (GPCC) over Mongolia and southern part of Eastern Siberia in July

Elena V. Devyatova, Olga Yu. Antokhina, Pavel N. Antokhin, Vladimir I. Mordvinov, Inna V. Latysheva

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Proceedings Volume 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 112086M (2019) https://doi.org/10.1117/12.2538640
Event: XXV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2019, Novosibirsk, Russian Federation

Abstract

We have compared Total Cloud Cover (TCC) data from ECMWF ERA-Interim reanalysis project and precipitation data from the GPCC project in July over 1979 – 2016. The region of our special interest covers Mongolia and southern part of Eastern Siberia. The models predict TCC. It is subject to errors related to physical parameterizations used in the model and needs to be examined. А precipitation from GPCC is a set of observation data interpolated into regular grid points. Although precipitation is indirectly related to cloudiness, we revealed a good agreement in interannual dynamics between two data sets over the region excluding the period 1982 – 1989 with the poor agreement (overestimated TCC data). This fact allows us to use TCC for the study of atmospheric circulation features over Mongolia and southern part of Eastern Siberia in the years with the good agreement of data. We revealed that precipitation intensity in the region depends on East Asian summer monsoon intensity. We also revealed that the atmospheric blocks over Eastern Siberia (90°E – 120°E) were observed for high TCC values and positive precipitation anomalies over the Selenga River basin (1990 and 1993) and there were no blocks over Eastern Siberia for low TCC values and negative precipitation anomalies (1980 and 2007).

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Elena V. Devyatova, Olga Yu. Antokhina, Pavel N. Antokhin, Vladimir I. Mordvinov, and Inna V. Latysheva "Comparison of total cloud cover (ERA-Interim) and precipitation (GPCC) over Mongolia and southern part of Eastern Siberia in July", Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112086M (18 December 2019); https://doi.org/10.1117/12.2538640

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KEYWORDS

Clouds

Climatology

Atmospheric optics

Basic research

Environmental sensing

Observatories

Physics

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