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Atmospheric blockings in Western Siberia. Part 1. Detection features, objective criteria, and their comparison

Based on the NCEP/NCAR and ERA-Interim reanalysis archives, we investigated different methods to detect atmospheric blocking events in Western Siberia. Two criteria were studied that are based on calculating meridional gradients of the 500 hPa height and potential temperature at the dynamic tropopau...

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Bibliographic Details
Published in:Russian meteorology and hydrology 2017-10, Vol.42 (10), p.644-652
Main Authors: Antokhina, O. Yu, Antokhin, P. N., Zorkal’tseva, O. S., Devyatova, E. V.
Format: Article
Language:English
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Summary:Based on the NCEP/NCAR and ERA-Interim reanalysis archives, we investigated different methods to detect atmospheric blocking events in Western Siberia. Two criteria were studied that are based on calculating meridional gradients of the 500 hPa height and potential temperature at the dynamic tropopause. A situation is considered blocking, when it features a gradient inversion of the investigated characteristics. Additionally, we performed a synoptic analysis of individual blocking events.
ISSN:1068-3739
1934-8096
DOI:10.3103/S106837391710003X