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Research Article
Tatiana Ermakova
Russian State Hydrometeorological University
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0808-2226
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This work is licensed under a CC BY 4.0 License. Read Full License
The behavior of planetary wave with zonal wave number 1 (PW1) at the heights of middle and upper stratosphere during different El Nino types has been considered. The sets of 5 winters have been chosen for each El Nino type using the table of available extended Multivariate El Nino Southern Oscillation (ENSO) Index values and index for identifying different types of El Nino Modoki events. Comparing planetary wave response and residual circulation under various conditions caused by Modoki I, II, and canonical El Nino, it has been revealed identical features associated with any of this type. The activity of travelling waves has been presented at three latitudes (2.5, 27.5, and 62.5) of Northern Hemisphere to follow the changes in behavior of waves. Travelling waves determined at 2.5°N latitude during every El Nino type have similar wave activity distribution despite the different location of SST anomaly. The standing waves activity at 27.5°N latitude during Modoki II type is similar to this activity during canonical one. This similarity disappears at lower latitudes, where wave amplitudes every canonical winter do not distinguish each other greatly especially standing and westward propagating waves.
Keywords
El Nino type, planetary waves, travelling waves, dynamics of stratosphere
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research Article
Tatiana Ermakova
Russian State Hydrometeorological University
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0808-2226
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 30 Mar, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The behavior of planetary wave with zonal wave number 1 (PW1) at the heights of middle and upper stratosphere during different El Nino types has been considered. The sets of 5 winters have been chosen for each El Nino type using the table of available extended Multivariate El Nino Southern Oscillation (ENSO) Index values and index for identifying different types of El Nino Modoki events. Comparing planetary wave response and residual circulation under various conditions caused by Modoki I, II, and canonical El Nino, it has been revealed identical features associated with any of this type. The activity of travelling waves has been presented at three latitudes (2.5, 27.5, and 62.5) of Northern Hemisphere to follow the changes in behavior of waves. Travelling waves determined at 2.5°N latitude during every El Nino type have similar wave activity distribution despite the different location of SST anomaly. The standing waves activity at 27.5°N latitude during Modoki II type is similar to this activity during canonical one. This similarity disappears at lower latitudes, where wave amplitudes every canonical winter do not distinguish each other greatly especially standing and westward propagating waves.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
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