Simultaneous measurements of OClO, NO<sub>2</sub> and O<sub>3</sub> in the Arctic polar vortex by the GOMOS instrument
We present the first nighttime measurements of OClO from a limb-viewing satellite instrument in the Arctic polar vortex. The relationship between OClO, NO<sub>2</sub> and O<sub>3</sub> slant column densities in the Arctic polar vortex are analyzed from the GOMOS measurements....
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/9/7857/2009/acp-9-7857-2009.pdf |
| Summary: | We present the first nighttime measurements of OClO from a limb-viewing satellite instrument in the Arctic polar vortex. The relationship between OClO, NO<sub>2</sub> and O<sub>3</sub> slant column densities in the Arctic polar vortex are analyzed from the GOMOS measurements. The retrieval process is based on a differential optical absorption spectroscopy (DOAS) method applied on the weighted median GOMOS transmittances. A study of the longitudinal distributions of OClO, NO<sub>2</sub> and O<sub>3</sub> above 65° north in January 2008 is presented. It shows a strong halogen activation in the lower stratosphere and a strong denoxification in the entire stratosphere inside the Arctic polar vortex. Time series of temperatures and OClO, NO<sub>2</sub> and O<sub>3</sub> slant column densities for the winters 2002/2003 to 2007/2008 are also presented. They highlight the correlation between temperature, OClO and NO<sub>2</sub>. The GOMOS instrument appears to be a very suitable instrument for the monitoring of OClO, NO<sub>2</sub> and O<sub>3</sub> in the stratosphere during nighttime. |
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| ISSN: | 1680-7316 1680-7324 |