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| Titel |
Estimating vertical fluxes of ozone within the atmospheric boundary layer |
| VerfasserIn |
Boris D. Belan, Pavel N. Antokhin, Olga Yu. Antokhina, Mikhail Yu. Arshinov, Sergey B. Belan, Denis K. Davydov, Oleg A. Krasnov, Alexey V. Penenko, Denis E. Savkin, Tatayna K. Sklyadneva, Gennadii N. Tolmahev |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250147230
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| Publikation (Nr.) |
 EGU/EGU2017-11358.pdf |
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| Zusammenfassung |
| Investigation of the vertical distribution of ozone within the atmospheric boundary layer
(ABL) was carried out by use of AN-2 light aircraft as a research platform. Vertical fluxes of
ozone and their direction from the ground to the free-tropospheric level were calculated based
on the in situ measurement data. Research flights have been performed over the greenhouse
gas monitoring station located in a background area (56.1–56.4 N, 84.2–84.8 E) in the
vicinity of abandoned village of Berezorechka (West Siberia). The schedule of diurnal flights
was as follows: the first one just after the sunrise; the second one at noon; the third
one 2-3 hours after noon, when a well-developed turbulence is observed; and the
last one just before the sunset. A total of 10 diurnal cycles of measurements were
undertaken.
Analysis of the obtained data showed that the rate of ozone influx from upper layers of
the atmosphere is 3-10 times less than the ozone production rate in the ABL. Average rate of
ozone influx from the free troposphere was about 1 μg m−3 h−1, but ozone production rate in
the ABL was about 5 μg m−3 h−1, so the major part of ozone is formed by photochemical
reactions that occur within the ABL and only 20 % of its content is determined by the influx
from the free troposphere. The vertical profiles of the ozone fluxes have shown that their
maximum values are observed at heights from 200 to 600 m AGL. The height of the
maximum depends on the season: in winter it is lower than 200-300 m, and in summer the
maximum is observed at 500-600 m. The value of the ozone flux maximum also
depends on the season and varies from 1 μg m−2 s−1in winter to 4.2 μg m−2 s−1 in
spring.
This work was supported by the Russian Foundation for Basic Research (grant No
17-05-00374). |
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