Statiatical structure of the fields of geopotential heights of 850 HPA pressure level in the western sector of the southern hemisphere
Journal Title: Український гідрометеорологічний журнал - Year 2017, Vol 19, Issue 19
Abstract
Study of the El Niño-La Niña is a major challenge for the scientific community. In addition to the impact on weather and climate in different regions of the Earth, this phenomenon is associated with the socio-economic impact for many countries. The task of such a large-scale phenomenon prognosis is associated with considerable difficulties, one of the main problems is the infrequency of its occurrence and changes in the characteristics between the events. Therefore, a comprehensive study of its urgent task for the international scientific community. This paper presents the results of a study of the statistical structure of the fields of geopotential heights of 850 hPa pressure level in the western sector of the Southern hemisphere. The study was conducted using a component analysis. Decomposition fields of principal components in different scales are shown. Filtered field anomalies suggest tendencies of formation of the zonal Walker’ cells, characteristic for the warm period of El Niño, La Niña, when the structure of the Walker’ cell is less pronounced. Tendencies offset to the east of the Pacific high in the Southern Hemisphere to split it into two parts, as can be seen from the fields of geopotential height anomalies. The zonal circulation Walker’ cell in the warm and cold phases of ENSO is clearly appeared in the fields of geopotential heights, when is highlight the part caused by the second principal components.
Authors and Affiliations
E. P. Shkolnyy, A. I. Sushchenko
Keywords
Related Articles
- EP ID EP327961
- DOI 10.31481/uhmj.19.2017.04
- Views 70
- Downloads 0
Scientific and methodological base for calculation of rain and spring floods maximum runoff
For more than 40 years estimated characteristics of rivers' maximum runoff for rain and spring floods in Ukraine have been determined using the regulatory document SNiP 2.01.14-83. This regulatory document is based on us...
Influence of long-term donor irrigation on quality of underground water in the south-steppe zone of Ukraine (case of the Baraboy River, Odessa Region)
The article presents the results of in-situ studies of the chemical composition and quality of underground (subsoil and artesian) water within the basin of the Baraboy River where irrigation of agricultural areas using t...
Ukrainian segment of the ENTLN (LIGHTNING FINDING SYSTEM)
The Ukrainian segment of the Earth Networks lightning finding system created in 2016 is dis-cussed in the paper. It consists of 12 sensors located in different parts of Ukraine which allow identifying both types of light...
On the opportunities of diagnosis and forecast of deep convection during operational activity
Introduction. The increase of cyclonic storms intensity is one of the manifestations of widespread climate change. This determines emergence of extreme weather phenomena resulting in human and economic losses. Convective...
Wind-induced sea level fluctuations at Yuzhnyi and Chornomorsk sea ports and evaluation of the possibility of their forecast
The sea level of the Black Sea coastal area is subject to non-periodic wind-induced fluctuations. Such fluctuations affect economic activity of the sea ports, enterprises and businesses located within the coastal area wh...