A comparison between effects of solar proton events and of geomagnetic storms on the ozone profiles

Tassev, Yordan; Velinov, P.; Mateev, L. N.; Tomova, Dimitrinka

doi:10.1016/s0273-1177(03)00126-1

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…They apparently did not provide a consistent pattern. More recent results of other authors (e.g., Storini, 2003;Belinskaya et al, 2001;Tassev et al, 2003) confirm this apparent inconsistence. However, our further investigations (Mlch, 1994;Mlch and LagtoviWka, 1995;LagtoviWka and Mlch, 1999) provided a consistent pattern of the geomagnetic storm effect on the total ozone at northern middle latitudes, which occurred as a significant effect only under very limited conditions, while it was negligible or at least much smaller, questionable and statistically insignificant under all other conditions.…”

Section: Introductionmentioning

confidence: 76%

Geomagnetic storms, Forbush decreases of cosmic rays and total ozone at northern higher middle latitudes

Laštovička

Križan

2005

Journal of Atmospheric and Solar-Terrestrial Physics

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Section: Introductionmentioning

confidence: 76%

Geomagnetic storms, Forbush decreases of cosmic rays and total ozone at northern higher middle latitudes

Laštovička

Križan

2005

Journal of Atmospheric and Solar-Terrestrial Physics

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“…According to [37,38], the GCR flux is modulated by the solar wind and the geomagnetic field, whose spatial inhomogeneity focuses or defocuses the charged energetic particles in certain regions of the world. The ionization they create near the tropopause activates ion-molecular reactions that create or destroy ozone near the tropopause [39][40][41]. The strong ability of ozone to absorb electromagnetic radiation with different wavelengths, determines its capability to affect the stratospheric temperature.…”

Section: Mechanism For Gcr Influence On Climatementioning

confidence: 99%

Extra-terrestrial influence on climate variability

Velichkova

Kilifarska

2022

J. Phys.: Conf. Ser.

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This study is focused on the analysis of signatures of extra-terrestrial influence on the centennial variability of some climatic variables, during the period 1900-2010. The applied lagged cross-correlation analysis shows evidence for a synchronisation between intensity of galactic cosmic rays (GCR) and two climate variables – the air surface temperature and the sea level pressure. The time delay of climatic response is not more than 5 years in the regions of stronger correlations. Moreover, the centennial variability of GCR is imprinted on the ozone mixing ratio at 70 hPa, suggesting its role of a mediator of GCR influence on climate. Having in mind the ozone’s capability to control the near tropopause temperature and humidity, we have suggested a mechanism describing the transmission of GCR signal from lower stratosphere, down to the Earth’s surface.

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“…The efficiency of the ozone self-restoration has been estimated by Kilifarska et al [21], which created a chemical model of this effect. Using their formula (6) we have estimated the changes in the O3 profile resulting from a uniform reduction of its optical depth ( 3  ) by 30% above 35 km. Calculations have been made at two latitudes -40 o N and 60 o Nusing the ERA Interim data for 13 January (up to the stratopause) as non-disturbed O3 and T profiles.…”

Section: Mechanism Of O3 Enhancement During and After January'2005 Spementioning

confidence: 99%

“…The middle atmosphere response to the influence of energetic particle (emitted by the solar proton events) is investigated by many authors [1][2][3][4][5][6][7][8][9][10][11][12], with most of them focusing their attention on the ozone depletion at polar latitudes. The possibility for ozone enhancement has been predicted by Jackman et al, [13] using the 2D chemical-transport model of NASA Goddard Space Flight Centre.…”

Section: Introductionmentioning

confidence: 99%

Latitudinal dependence of the stratospheric ozone and temperature response to solar particles’ forcing оn 20 January 2005

Kilifarska¹

2019

ARB

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This study examines the latitudinal-altitudinal variations of the midday O3and temperature response to the forcing of the enhanced flux of energetic particles, during January 2005 Solar Proton Event (SPE). We show that short-term response of the stratospheric O3 depends strongly on the latitude and the energy of precipitating particles. At polar latitudes, where the relativistic electrons and “soft” protons are able to penetrate deeper into the atmosphere, we found a reduction of the peak ozone density in periods of enhanced particles’ fluxes. Such a response is widely explained by the activation of HOx and NOx ozone destructive cycles. At mid-latitudes, however, the stratospheric part of the O3profile remains insensitive to these lower energy particles, because they affect only the thermospheric and mesospheric O3. On the other hand, the “hard” protons, emitted during the third solar flare on 20 January, are able to propagate much deeper, affecting even the stratospheric ozone and reducing its density. As a consequence of the thinning of the ozone optical depth, the solar UV penetrates deeper into the atmosphere, activating the Slanger’s mechanism for ozone production at lower levels –known also as ozone self-restoration. This could be an explanation for the obtained raise of the mid-latitude peak O3density in the period of atmospheric restoration after the SPE’2005. The earlier raise of the polar ozone maximal density –i.e. between 18 and 21 January –could be related to the fact that at the moment of SPE’2005it has been already diminished by the relativistic electrons and “soft” protons, getting ahead of the strongest proton flare. So the further ozone destruction (by particles with mixed energies) triggered the activation of its restoration several days earlier. Consequently, the latitudinal differences in the ozone response –found in ERA Interim data –could be attributed to the different energetic spectrum of solar flares, the depth of the particles’ penetration into the atmosphere and the zenith angle of stratosphere illumination by the solar UV radiation. Enhancement of the lower and middle stratospheric temperature during the SPE’2005 has to be attributed to the increased ozone density and the more solar UV radiation absorbed.

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A comparison between effects of solar proton events and of geomagnetic storms on the ozone profiles

Cited by 7 publications

References 13 publications

Geomagnetic storms, Forbush decreases of cosmic rays and total ozone at northern higher middle latitudes

Geomagnetic storms, Forbush decreases of cosmic rays and total ozone at northern higher middle latitudes

Extra-terrestrial influence on climate variability

Latitudinal dependence of the stratospheric ozone and temperature response to solar particles’ forcing оn 20 January 2005

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