The tropopause slope as a characteristic of its deformation

Ivanova, A. R.

doi:10.3103/s1068373911020026

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…The presentation of dy namic tropo pause in the form of a ma te rial sur face en ables ob serv ing the STE fea tures in the zones of its de for ma tion [1]. The ar eas of the tropo pause highs are of ten called "domes," and those of the tropo pause lows are called "folds.…”

Section: Quan Ti Ta Tive Es Ti Mates Of Strato Sphere-tro Po Sphere Ementioning

confidence: 99%

Stratosphere-troposphere exchange and its specific features at extratropical latitudes

Ivanova

2016

Russ. Meteorol. Hydrol.

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A review of the papers dealing with various aspects of stratosphere-troposphere exchange (STE) is presented. The development of STE concepts is described and quantitative estimates of STE obtained by different authors are given. Typical time scales and geographic features of STE are described. Special attention is given to the specific features of STE at extratropical latitudes where active vertical air transport is observed in both directions. The air ascent through the tropopause occurs there in the zones of warm conveyor belts, and the air descent takes place in the zones of stratospheric intrusions. Exchange processes in the key region including the upper troposphere and the lowermost stratosphere are described. The mechanisms of large-scale stratospheric intrusions in the systems of tropopause folds or cut-off lows are presented as well as the mechanisms of the mixing of the stratospheric air with the tropospheric one. Specific features of deep stratospheric intrusions are discussed which are based on the analysis of such indicators of stratospheric air as high concentrations of ozone and stratospheric radionuclide 7 Be. Some aspects of stratosphere-troposphere energy exchange are considered. po sphere ex change, tropo pause, strato spheric in tru sions, fil a ments, ozone, strato spheric radionuclides, block ing, sud den strato spheric warm ing, waveguides

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Section: Quan Ti Ta Tive Es Ti Mates Of Strato Sphere-tro Po Sphere Ementioning

confidence: 99%

Stratosphere-troposphere exchange and its specific features at extratropical latitudes

Ivanova

2016

Russ. Meteorol. Hydrol.

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“…The main characteristic is the tropopause height H tr ; also, the tropopause slope values with respect to the Earth's surface were calculated as a measure of deformation of the troposphere-stratosphere interface. The technique of the tropopause slope calculation is described in detail in [1].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of the tropopause for the cases of sharp changes in total ozone at the midlatitudes of the northern hemisphere

Ivanova

2011

Russ. Meteorol. Hydrol.

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Analysis is presented of height changes of the tropopause as approximated by the level of 3.5 pvu of vertical component of Ertel potential vorticity, for the cases of sharp (exceeding 100 DU per day) changes in total ozone (TO) on the basis of a special series of synchronous values of the tropopause characteristics and TO at the 1´1°grid within 30°-70°N latitude belt in 2009. Occurrence frequency of the cases is estimated depending on latitude and longitude. It is shown that sharp increase (decrease) in TO is unambiguously associated with decreasing (increasing) tropopause height, regardless of its oscillations during the day. Separate cases of sharp TO changes are studied, and changes in the tropopause characteristics are quantitatively specified.

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“…Such situations were analyzed on the basis of observational data obtained in 2009 [Ivanova, 2011] and 2009-2011 [Ivanova, 2013]. It was shown that a rapid increase (decrease) in the TOC is unambiguously associated with a descent (ascent) of the tropopause position.…”

Section: Total Contentmentioning

confidence: 99%

“…A method of calculation of the tropopause slope on basis of data about its height presented on regular grid is proposed in (Ivanova, 2011). Based on NCEP2 reanalysis data over 1990-2007, the tilt angles of the tropopause are calculated by approximating it by different isoscalar surfaces of Ertel's potential vorticity in the latitude band 30-70°N.…”

Section: Large-scale Processes and The Weather Forecastmentioning

confidence: 99%