Estimate of the effects of Pinatubo eruption in stratospheric O3 and NO2 contents taking into account the variations in the solar activity
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The SBUV and SBUV-2 satellite observations and ground-based measurements of the total NO2 at the NDACC network are used to estimate the effects of the eruption of the Pinatubo volcano and variations in the level of solar activity on the stratospheric O3 and NO2. The NO2 decrease due to the Pinatubo eruption had been from 19 to 34% at different stations, with the NO2 content, on the whole, found to decrease somewhat more strongly in the Southern Hemisphere (SH) than in the Northern Hemisphere (NH). On the contrary, the O3 concentration decreased much more strongly in the lower stratosphere at HN extratropical latitudes (∼10%) than in the SH. The maximal percentage decrease in ozone concentration (by ∼22%) is found around the 10-hPa (32-km) level at 10–15° S. In general traits, the effect of the 11-year solar cycle on the stratospheric ozone is symmetrical about the equator. The altitudinal maxima of the O3 response to the solar cycle are identified at heights of 50–55, 35–40, and below 25 km. Changes in O3 concentration in these layers are usually within a few percent. Substantial interhemispheric differences are found in the NO2 response to the 11-year solar cycle. At most of the SH stations, the NO2 content in the phase of maximum of solar activity is usually smaller than in the phase of minimum. The NO2 content at NH low and middle latitudes is, more often, larger during the maximum than the minimum of solar activity. The NO2 variations during the solar activity cycle are usually within 5%.
Keywordsozone NO2 Pinatubo volcano solar activity
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- 4.D. J. Hofmann, S. J. Oltmans, W. D. Komhyr, J. M. Harris, J. A. Lathrop, A. O. Langford, T. Deshler, B. J. Johnson, A. Torress, and W. A. Matthews, “Ozone loss in the lower stratosphere over the United States in 1992–1993: Evidence for heterogeneous chemistry on the Pinatubo aerosol,” Geophys. Rev. Lett. 21(1), 65–68 (1994).CrossRefADSGoogle Scholar
- 5.W. B. Grant, E. V. Browell, J. Fishman, V. J. Brackett, R. E. Veiga, D. Nganga, A. Minga, B. Cros, C. F. Butler, M. A. Fenn, C. S. Long, and L. L. Stowe, “Aerosol-associated changes in tropical stratospheric ozone following the eruption of Mount Pinatubo,” J. Geophys. Res., D 99(4), 8197–8211 (1994).CrossRefADSGoogle Scholar
- 7.S. Solomon, R. W. Sanders, R. O. Jakoubek, K. H. Arpag, S. L. Stephens, J. G. Keys, and R. R. Garcia, “Visible and near-Ultraviolet spectroscopy at McMurdo station, Antarctica. 10. Reductions of stratospheric NO2 due to Pinatubo aerosols 1994,” J. Geophys. Res., D 99(2), 3509–3516 (1994).CrossRefADSGoogle Scholar
- 11.L. J. Mickley, J. P. D. Abbatt, J. E. Frederik, and J. M. Russell, III, “Response of summertime odd nitrogen and ozone at 17 Mbar to Mount Pinatubo aerosol over the southern midlatitudes: Observations from the halogen occultation experiment,” J. Geophys. Res., D 102(19), 23573–23582 (1997).CrossRefADSGoogle Scholar
- 12.M. Van Roozendael, M. De Maziere, C. Hermans, P. C. Simon, J.-P. Pommereau, F. Goutail, X. X. Tie, G. Brasseur, and C. Granier, “Ground-based observations of stratospheric NO2 at high and midlatitudes in Europe after the Mount Pinatubo eruption,” J. Geophys. Res., D 102(15), 19171–19176 (1997).CrossRefGoogle Scholar
- 14.M. De Maziere, M. Van Roozendael, C. Hermans, P. C. Simon, P. Demoulin, G. Roland, and R. Zander, “Quantitative evaluation of the post-Mount Pinatubo NO2 reduction and recovery, based on 10 years of Fourier transform Infrared and UV-visible spectroscopic measurements at Jungfraujoch,” J. Geophys. Res., D 103(9), 10849–10858 (1998).CrossRefGoogle Scholar
- 20.A. N. Gruzdev, “Estimate of the effect of 11-year solar cycle on stratospheric ozone,” Geomag. Aeronom. (in press).Google Scholar
- 21.A. S. Elokhov and A. N. Gruzdev, “Nitrogen dioxide column content and vertical profile measurements at the Zvenigorod research station,” Izv. Atmos. Ocean. Phys. 36(6), 763–777 (2000).Google Scholar