HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments
We present vertical profiles of hydrogen chloride (HCl) and chlorine monoxide (ClO) as observed by the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on the International Space Station (ISS) inside the Antarctic vortex on 19–24 November 2009. The SMILES HCl value reveals 2.8–3.1 p...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2013-11-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/6/3099/2013/amt-6-3099-2013.pdf |
| _version_ | 1819066076760113152 |
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| author | T. Sugita Y. Kasai Y. Terao S. Hayashida G. L. Manney W. H. Daffer H. Sagawa M. Suzuki M. Shiotani K. A. Walker C. D. Boone P. F. Bernath |
| author_facet | T. Sugita Y. Kasai Y. Terao S. Hayashida G. L. Manney W. H. Daffer H. Sagawa M. Suzuki M. Shiotani K. A. Walker C. D. Boone P. F. Bernath |
| author_sort | T. Sugita |
| collection | DOAJ |
| description | We present vertical profiles of hydrogen chloride (HCl) and chlorine monoxide
(ClO) as observed by the Superconducting Submillimeter-Wave Limb-Emission
Sounder (SMILES) on the International Space Station (ISS)
inside the Antarctic vortex on 19–24 November 2009. The SMILES HCl value
reveals 2.8–3.1 ppbv between 450 K and 500 K levels in potential temperature
(PT). The high value of HCl is highlighted since it is suggested that HCl
is a main component of the total inorganic chlorine (Cl<sub>y</sub>),
defined as Cl<sub>y</sub> ≃ HCl + ClO + chlorine nitrate (ClONO<sub>2</sub>), inside the
Antarctic vortex in spring, owing to low ozone values. To confirm the quality
of two SMILES level 2 (L2) data products provided by the Japan Aerospace
Exploration Agency (JAXA) and Japan's National Institute of Information and
Communications Technology (NICT), vis-à-vis the partitioning of
Cl<sub>y</sub>, comparisons are made using other satellite data from the Aura Microwave
Limb Sounder (MLS) and Atmospheric Chemistry Experiment Fourier Transform
Spectrometer (ACE-FTS). HCl values from the SMILES NICT L2 product agree to
within 10% (0.3 ppbv) with the MLS HCl data between
450 and 575 K levels in PT and with the ACE-FTS HCl data
between 425 and 575 K.
The SMILES JAXA L2 product is 10 to 20%
(0.2–0.5 ppbv) lower than that from MLS between 400 and
700 K and from ACE-FTS between 500 and 700 K. For ClO in daytime, the
difference between SMILES (JAXA and NICT) and MLS is less
than ±0.05 ppbv (100 %) between 500 K and 650 K with
the ClO values less than 0.2 ppbv. ClONO<sub>2</sub> values as measured by ACE-FTS
also reveal 0.2 ppbv at 475–500 K level, resulting in the HCl / Cl<sub>y</sub> ratios of
0.91–0.95. The HCl / Cl<sub>y</sub> ratios derived from each retrieval
agree to within −5 to 8 % with regard to their averages. The high HCl values
and HCl / Cl<sub>y</sub> ratios observed by the three instruments in the lower
stratospheric Antarctic vortex are consistent with previous observations in
late Austral spring. |
| first_indexed | 2024-12-21T15:56:37Z |
| format | Article |
| id | doaj.art-e660f8e91e884ff39bae1d6a5e4dd3a2 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-21T15:56:37Z |
| publishDate | 2013-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-e660f8e91e884ff39bae1d6a5e4dd3a22022-12-21T18:58:06ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482013-11-016113099311310.5194/amt-6-3099-2013HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instrumentsT. Sugita0Y. Kasai1Y. Terao2S. Hayashida3G. L. Manney4W. H. Daffer5H. Sagawa6M. Suzuki7M. Shiotani8K. A. Walker9C. D. Boone10P. F. Bernath11National Institute for Environmental Studies, Tsukuba, Ibaraki, JapanNational Institute of Information and Communications Technology (NICT), Koganei, Tokyo, JapanNational Institute for Environmental Studies, Tsukuba, Ibaraki, JapanFaculty of Science, Nara Women's University, Nara, JapanNorthWest Research Associates, Inc., Socorro, New Mexico, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USANational Institute of Information and Communications Technology (NICT), Koganei, Tokyo, JapanInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, JapanResearch Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, JapanDepartment of Physics, University of Toronto, Toronto, Ontario, CanadaDepartment of Chemistry, University of Waterloo, Waterloo, Ontario, CanadaDepartment of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, USAWe present vertical profiles of hydrogen chloride (HCl) and chlorine monoxide (ClO) as observed by the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on the International Space Station (ISS) inside the Antarctic vortex on 19–24 November 2009. The SMILES HCl value reveals 2.8–3.1 ppbv between 450 K and 500 K levels in potential temperature (PT). The high value of HCl is highlighted since it is suggested that HCl is a main component of the total inorganic chlorine (Cl<sub>y</sub>), defined as Cl<sub>y</sub> ≃ HCl + ClO + chlorine nitrate (ClONO<sub>2</sub>), inside the Antarctic vortex in spring, owing to low ozone values. To confirm the quality of two SMILES level 2 (L2) data products provided by the Japan Aerospace Exploration Agency (JAXA) and Japan's National Institute of Information and Communications Technology (NICT), vis-à-vis the partitioning of Cl<sub>y</sub>, comparisons are made using other satellite data from the Aura Microwave Limb Sounder (MLS) and Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS). HCl values from the SMILES NICT L2 product agree to within 10% (0.3 ppbv) with the MLS HCl data between 450 and 575 K levels in PT and with the ACE-FTS HCl data between 425 and 575 K. The SMILES JAXA L2 product is 10 to 20% (0.2–0.5 ppbv) lower than that from MLS between 400 and 700 K and from ACE-FTS between 500 and 700 K. For ClO in daytime, the difference between SMILES (JAXA and NICT) and MLS is less than ±0.05 ppbv (100 %) between 500 K and 650 K with the ClO values less than 0.2 ppbv. ClONO<sub>2</sub> values as measured by ACE-FTS also reveal 0.2 ppbv at 475–500 K level, resulting in the HCl / Cl<sub>y</sub> ratios of 0.91–0.95. The HCl / Cl<sub>y</sub> ratios derived from each retrieval agree to within −5 to 8 % with regard to their averages. The high HCl values and HCl / Cl<sub>y</sub> ratios observed by the three instruments in the lower stratospheric Antarctic vortex are consistent with previous observations in late Austral spring.http://www.atmos-meas-tech.net/6/3099/2013/amt-6-3099-2013.pdf |
| spellingShingle | T. Sugita Y. Kasai Y. Terao S. Hayashida G. L. Manney W. H. Daffer H. Sagawa M. Suzuki M. Shiotani K. A. Walker C. D. Boone P. F. Bernath HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments Atmospheric Measurement Techniques |
| title | HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments |
| title_full | HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments |
| title_fullStr | HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments |
| title_full_unstemmed | HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments |
| title_short | HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments |
| title_sort | hcl and clo profiles inside the antarctic vortex as observed by smiles in november 2009 comparisons with mls and ace fts instruments |
| url | http://www.atmos-meas-tech.net/6/3099/2013/amt-6-3099-2013.pdf |
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