Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year
We present an analysis of the diurnal ozone cycle from 1 year of continuous ozone measurements from two ground-based microwave radiometers in the Arctic. The instruments GROMOS-C and OZORAM are located at the AWIPEV research base at Ny-Ålesund, Svalbard (79° N, 12° E), and gathered a comprehensi...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2018-03-01
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Series: | Atmospheric Chemistry and Physics |
Online Access: | https://www.atmos-chem-phys.net/18/4113/2018/acp-18-4113-2018.pdf |
Summary: | We present an analysis of the diurnal ozone cycle from 1 year of
continuous ozone measurements from two ground-based microwave
radiometers in the Arctic. The instruments GROMOS-C and OZORAM are located at the AWIPEV research base at Ny-Ålesund, Svalbard
(79° N, 12° E), and gathered a comprehensive time
series of middle-atmospheric ozone profiles with a high time
resolution. An intercomparison was performed with EOS MLS and ozone
sonde measurements and simulations with SD-WACCM. The measured
data sets were used to study the photochemically induced diurnal
cycle of ozone in the stratosphere and mesosphere. Throughout the
year the insolation in the Arctic changes drastically from polar
night to polar day. Accordingly, the seasonal variations in the
diurnal ozone cycle are large. In the stratosphere we found
a diurnal cycle throughout the entire period of polar day with the
largest amplitude in April. In the mesosphere a diurnal cycle was
detected in spring and fall. SD-WACCM has been proven to capture
the diurnal cycle well and was therefore used to analyse the chemical
reaction rates of ozone production and loss at equinox and summer
solstice. Furthermore GROMOS-C proved capable of measuring the
tertiary ozone layer above Ny-Ålesund in winter. |
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ISSN: | 1680-7316 1680-7324 |