Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer
This paper describes the stratospheric and mesospheric ozone profiles retrieved from spectral measurements of the 249.96 GHz O<sub>3</sub> line, using the British Antarctic Survey's ground-based Microwave Radiometer at Troll (BAS-MRT), Antarctica (72°01' S, 02°32' E, 62° M...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-03-01
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| Series: | Earth System Science Data |
| Online Access: | http://www.earth-syst-sci-data.net/6/105/2014/essd-6-105-2014.pdf |
| _version_ | 1819146977931165696 |
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| author | M. Daae C. Straub P. J. Espy D. A. Newnham |
| author_facet | M. Daae C. Straub P. J. Espy D. A. Newnham |
| author_sort | M. Daae |
| collection | DOAJ |
| description | This paper describes the stratospheric and mesospheric ozone profiles
retrieved from spectral measurements of the 249.96 GHz O<sub>3</sub> line, using the
British Antarctic Survey's ground-based Microwave Radiometer at Troll
(BAS-MRT), Antarctica (72°01' S, 02°32' E, 62° Mlat).
The instrument operated at Troll from February 2008 through January 2010, and
hourly averaged spectra were used to retrieve approximately 20 ozone profiles
per day. The ozone profiles cover the pressure range from 3 hPa to 0.02 hPa
(approximately 38 to 72 km) which includes the topside of the stratospheric
ozone layer and the peak of the tertiary maximum. Comparing the retrieved
ozone volume mixing ratio (vmr) values to Aura/MLS and SD-WACCM shows no
significant bias to within the instrumental uncertainties. The long-term
variations (>20 days) between MLS and SD-WACCM agree well with BAS-MRT at
all altitudes with significant correlation coefficients of at least 0.9 (0.7
with SD-WACCM) in the upper stratosphere and middle mesosphere. A weaker
correlation is found for the long-term variations in summer when most of the
vmr values are below the random noise level of Aura/MLS. The correlation of
short-term variations (<20 days) between MLS and BAS-MRT agree well at all
altitudes with significant correlation coefficients of at least 0.7 in the
upper stratosphere and middle mesosphere. The ozone profiles retrieved at
Troll, Antarctica extend the sparse data coverage of middle atmospheric ozone
above Antarctica, where, due to the dynamic nature of the ozone
concentrations, systematic observations with a high temporal resolution are
desirable. The O<sub>3</sub> profiles presented here are stored at the UK's Polar
Data Centre (<a href="http://doi.org/nc3"target="_blank">http://doi.org/nc3</a>)
and are available for public
scientific use. |
| first_indexed | 2024-12-22T13:22:30Z |
| format | Article |
| id | doaj.art-767a496a9f654de78d4f7f187d05c2aa |
| institution | Directory Open Access Journal |
| issn | 1866-3508 1866-3516 |
| language | English |
| last_indexed | 2024-12-22T13:22:30Z |
| publishDate | 2014-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth System Science Data |
| spelling | doaj.art-767a496a9f654de78d4f7f187d05c2aa2022-12-21T18:24:25ZengCopernicus PublicationsEarth System Science Data1866-35081866-35162014-03-016110511510.5194/essd-6-105-2014Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometerM. Daae0C. Straub1P. J. Espy2D. A. Newnham3Norwegian University of Science and Technology, Department of Physics, Trondheim, NorwayNorwegian University of Science and Technology, Department of Physics, Trondheim, NorwayNorwegian University of Science and Technology, Department of Physics, Trondheim, NorwayBritish Antarctic Survey, Cambridge, UKThis paper describes the stratospheric and mesospheric ozone profiles retrieved from spectral measurements of the 249.96 GHz O<sub>3</sub> line, using the British Antarctic Survey's ground-based Microwave Radiometer at Troll (BAS-MRT), Antarctica (72°01' S, 02°32' E, 62° Mlat). The instrument operated at Troll from February 2008 through January 2010, and hourly averaged spectra were used to retrieve approximately 20 ozone profiles per day. The ozone profiles cover the pressure range from 3 hPa to 0.02 hPa (approximately 38 to 72 km) which includes the topside of the stratospheric ozone layer and the peak of the tertiary maximum. Comparing the retrieved ozone volume mixing ratio (vmr) values to Aura/MLS and SD-WACCM shows no significant bias to within the instrumental uncertainties. The long-term variations (>20 days) between MLS and SD-WACCM agree well with BAS-MRT at all altitudes with significant correlation coefficients of at least 0.9 (0.7 with SD-WACCM) in the upper stratosphere and middle mesosphere. A weaker correlation is found for the long-term variations in summer when most of the vmr values are below the random noise level of Aura/MLS. The correlation of short-term variations (<20 days) between MLS and BAS-MRT agree well at all altitudes with significant correlation coefficients of at least 0.7 in the upper stratosphere and middle mesosphere. The ozone profiles retrieved at Troll, Antarctica extend the sparse data coverage of middle atmospheric ozone above Antarctica, where, due to the dynamic nature of the ozone concentrations, systematic observations with a high temporal resolution are desirable. The O<sub>3</sub> profiles presented here are stored at the UK's Polar Data Centre (<a href="http://doi.org/nc3"target="_blank">http://doi.org/nc3</a>) and are available for public scientific use.http://www.earth-syst-sci-data.net/6/105/2014/essd-6-105-2014.pdf |
| spellingShingle | M. Daae C. Straub P. J. Espy D. A. Newnham Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer Earth System Science Data |
| title | Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer |
| title_full | Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer |
| title_fullStr | Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer |
| title_full_unstemmed | Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer |
| title_short | Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer |
| title_sort | atmospheric ozone above troll station antarctica observed by a ground based microwave radiometer |
| url | http://www.earth-syst-sci-data.net/6/105/2014/essd-6-105-2014.pdf |
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