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| Titel |
Total ozone decrease in the Arctic after REP events |
| VerfasserIn |
V. C. Roldugin, M. I. Beloglazov, G. F. Remenets |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 18, no. 3 ; Nr. 18, no. 3, S.332-336 |
| Datensatznummer |
250013935
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| Publikation (Nr.) |
 copernicus.org/angeo-18-332-2000.pdf |
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| Zusammenfassung |
Eight periods of relativistic electron
precipitation (REP) with electron energies of more than 300 keV are identified
from VLF data (10-14 kHz) monitored along the Aldra (Norway) - Apatity (Kola
peninsula) radio trace. In these cases, anomalous ionization below 55-50 km
occurred without disturbing the higher layers of the ionosphere. The daily total
ozone values in Murmansk for six days before and six days after the REP events
are compared. In seven of eight events a decrease in the total ozone of about 20
DU is observed. In one event of 25 March, 1986, the mean total ozone value for
six days before the REP is bigger than that for six days after, but this a case
of an extremely high ozone increase (144 DU during the six days). However, on
days 3 and 4 there was a minimum of about 47 DU with regard to REP days, so this
case also confirms the concept of the ozone decrease after REP. The difference
between mean ozone values for periods six days before and six days after the
REPs was found also for 23 points in Arctic on TOMS data. The difference was
negative only in Murmansk longitudinal sector. Along the meridian of the trace
it was negative at high latitudes in both hemispheres and was near zero at low
latitudes.
Key words: Atmospheric composition and structure
(middle atmosphere - composition and chemistry) - Meteorology and atmospheric
dynamics (polar meteorology) |
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