A global tropospheric ozone climatology from trajectory-mapped ozone soundings
A global three-dimensional (i.e. latitude, longitude, altitude) climatology of tropospheric ozone is derived from the ozone sounding record by trajectory mapping. Approximately 52 000 ozonesonde profiles from more than 100 stations worldwide since 1965 are used. The small number of stations results...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2013-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/13/10659/2013/acp-13-10659-2013.pdf |
| _version_ | 1818535514007928832 |
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| author | G. Liu J. Liu D. W. Tarasick V. E. Fioletov J. J. Jin O. Moeini X. Liu C. E. Sioris M. Osman |
| author_facet | G. Liu J. Liu D. W. Tarasick V. E. Fioletov J. J. Jin O. Moeini X. Liu C. E. Sioris M. Osman |
| author_sort | G. Liu |
| collection | DOAJ |
| description | A global three-dimensional (i.e. latitude, longitude, altitude) climatology
of tropospheric ozone is derived from the ozone sounding record by
trajectory mapping. Approximately 52 000 ozonesonde profiles from more than
100 stations worldwide since 1965 are used. The small number of stations
results in a sparse geographical distribution. Here, forward and backward
trajectory calculations are performed for each sounding to map ozone
measurements to a number of other locations, and so to fill in the spatial
domain. This is possible because the lifetime of ozone in the troposphere is
of the order of weeks. This physically based interpolation method offers
obvious advantages over typical statistical interpolation methods. The
trajectory-mapped ozone values show reasonable agreement, where they
overlap, to the actual soundings, and the patterns produced separately by
forward and backward trajectory calculations are similar. Major regional
features of the tropospheric ozone distribution are clearly evident in the
global maps. An interpolation algorithm based on spherical functions is
further used for smoothing and to fill in remaining data gaps. The resulting
three-dimensional global tropospheric ozone climatology facilitates
visualization and comparison of different years, decades, and seasons, and
offers some intriguing insights into the global variation of tropospheric
ozone. It will be useful for climate and air quality model initialization
and validation, and as an a priori climatology for satellite data retrievals.
Further division of the climatology into decadal and annual averages can
provide a global view of tropospheric ozone changes, although uncertainties
with regard to the performance of older sonde types, as well as more recent
variations in operating procedures, need to be taken into account. |
| first_indexed | 2024-12-11T18:25:54Z |
| format | Article |
| id | doaj.art-43194f7e003e4702b2f196e6e3dc17c1 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T18:25:54Z |
| publishDate | 2013-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-43194f7e003e4702b2f196e6e3dc17c12022-12-22T00:55:04ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242013-11-011321106591067510.5194/acp-13-10659-2013A global tropospheric ozone climatology from trajectory-mapped ozone soundingsG. Liu0J. Liu1D. W. Tarasick2V. E. Fioletov3J. J. Jin4O. Moeini5X. Liu6C. E. Sioris7M. Osman8Air Quality Research Division, Environment Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4, CanadaDepartment of Geography and Program in Planning, University of Toronto, 100 St. George Street, Toronto, ON M5S 3G3, CanadaAir Quality Research Division, Environment Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4, CanadaAir Quality Research Division, Environment Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4, CanadaDepartment of Earth and Space Science and Engineering, York University, Toronto, ON M3J 1P3, CanadaDepartment of Earth and Space Science and Engineering, York University, Toronto, ON M3J 1P3, CanadaHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 21250, USAAir Quality Research Division, Environment Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4, CanadaAir Quality Research Division, Environment Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4, CanadaA global three-dimensional (i.e. latitude, longitude, altitude) climatology of tropospheric ozone is derived from the ozone sounding record by trajectory mapping. Approximately 52 000 ozonesonde profiles from more than 100 stations worldwide since 1965 are used. The small number of stations results in a sparse geographical distribution. Here, forward and backward trajectory calculations are performed for each sounding to map ozone measurements to a number of other locations, and so to fill in the spatial domain. This is possible because the lifetime of ozone in the troposphere is of the order of weeks. This physically based interpolation method offers obvious advantages over typical statistical interpolation methods. The trajectory-mapped ozone values show reasonable agreement, where they overlap, to the actual soundings, and the patterns produced separately by forward and backward trajectory calculations are similar. Major regional features of the tropospheric ozone distribution are clearly evident in the global maps. An interpolation algorithm based on spherical functions is further used for smoothing and to fill in remaining data gaps. The resulting three-dimensional global tropospheric ozone climatology facilitates visualization and comparison of different years, decades, and seasons, and offers some intriguing insights into the global variation of tropospheric ozone. It will be useful for climate and air quality model initialization and validation, and as an a priori climatology for satellite data retrievals. Further division of the climatology into decadal and annual averages can provide a global view of tropospheric ozone changes, although uncertainties with regard to the performance of older sonde types, as well as more recent variations in operating procedures, need to be taken into account.http://www.atmos-chem-phys.net/13/10659/2013/acp-13-10659-2013.pdf |
| spellingShingle | G. Liu J. Liu D. W. Tarasick V. E. Fioletov J. J. Jin O. Moeini X. Liu C. E. Sioris M. Osman A global tropospheric ozone climatology from trajectory-mapped ozone soundings Atmospheric Chemistry and Physics |
| title | A global tropospheric ozone climatology from trajectory-mapped ozone soundings |
| title_full | A global tropospheric ozone climatology from trajectory-mapped ozone soundings |
| title_fullStr | A global tropospheric ozone climatology from trajectory-mapped ozone soundings |
| title_full_unstemmed | A global tropospheric ozone climatology from trajectory-mapped ozone soundings |
| title_short | A global tropospheric ozone climatology from trajectory-mapped ozone soundings |
| title_sort | global tropospheric ozone climatology from trajectory mapped ozone soundings |
| url | http://www.atmos-chem-phys.net/13/10659/2013/acp-13-10659-2013.pdf |
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