Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds
Laboratory studies have been carried out with the aim to improve our understanding of physicochemical processes which take place at the water ice/air interface initiated by solar irradiation with a wavelength of 121.6 nm. It was intended to mimic the processes of ice particles characteristic of Noct...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-02-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/11/1729/2011/acp-11-1729-2011.pdf |
| _version_ | 1818386114287763456 |
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| author | M. Yu. Kulikov A. M. Feigin S. K. Ignatov P. G. Sennikov Th. Bluszcz O. Schrems |
| author_facet | M. Yu. Kulikov A. M. Feigin S. K. Ignatov P. G. Sennikov Th. Bluszcz O. Schrems |
| author_sort | M. Yu. Kulikov |
| collection | DOAJ |
| description | Laboratory studies have been carried out with the aim to improve our understanding of physicochemical processes which take place at the water ice/air interface initiated by solar irradiation with a wavelength of 121.6 nm. It was intended to mimic the processes of ice particles characteristic of Noctilucent Clouds (NLCs). The experimental set-up used includes a high-vacuum chamber, a gas handling system, a cryostat with temperature controller, an FTIR spectrometer, a vacuum ultraviolet hydrogen lamp, and a microwave generator. We report the first results of measurements of the absolute photodesorption rate (loss of substance due to the escape of photoproducts into gas phase) from thin (20–100 nm) water ice samples kept in the temperature range of 120–150 K. The obtained results show that a flow of photoproducts into the gas phase is considerably lower than presumed in the recent study by Murray and Plane (2005). The experiments indicate that almost all photoproducts remain in the solid phase, and the principal chemical reaction between them is the recombination reaction H + OH → H<sub>2</sub>O which is evidently very fast. This means that direct photolysis of mesospheric ice particles seems to have no significant impact on the gas phase chemistry of the upper mesosphere. |
| first_indexed | 2024-12-14T03:48:54Z |
| format | Article |
| id | doaj.art-fde722baac5547f8996128212e2b2b53 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-14T03:48:54Z |
| publishDate | 2011-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-fde722baac5547f8996128212e2b2b532022-12-21T23:18:17ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242011-02-011141729173410.5194/acp-11-1729-2011Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent CloudsM. Yu. KulikovA. M. FeiginS. K. IgnatovP. G. SennikovTh. BluszczO. SchremsLaboratory studies have been carried out with the aim to improve our understanding of physicochemical processes which take place at the water ice/air interface initiated by solar irradiation with a wavelength of 121.6 nm. It was intended to mimic the processes of ice particles characteristic of Noctilucent Clouds (NLCs). The experimental set-up used includes a high-vacuum chamber, a gas handling system, a cryostat with temperature controller, an FTIR spectrometer, a vacuum ultraviolet hydrogen lamp, and a microwave generator. We report the first results of measurements of the absolute photodesorption rate (loss of substance due to the escape of photoproducts into gas phase) from thin (20–100 nm) water ice samples kept in the temperature range of 120–150 K. The obtained results show that a flow of photoproducts into the gas phase is considerably lower than presumed in the recent study by Murray and Plane (2005). The experiments indicate that almost all photoproducts remain in the solid phase, and the principal chemical reaction between them is the recombination reaction H + OH → H<sub>2</sub>O which is evidently very fast. This means that direct photolysis of mesospheric ice particles seems to have no significant impact on the gas phase chemistry of the upper mesosphere.http://www.atmos-chem-phys.net/11/1729/2011/acp-11-1729-2011.pdf |
| spellingShingle | M. Yu. Kulikov A. M. Feigin S. K. Ignatov P. G. Sennikov Th. Bluszcz O. Schrems Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds Atmospheric Chemistry and Physics |
| title | Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds |
| title_full | Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds |
| title_fullStr | Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds |
| title_full_unstemmed | Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds |
| title_short | Technical Note: VUV photodesorption rates from water ice in the 120–150 K temperature range – significance for Noctilucent Clouds |
| title_sort | technical note vuv photodesorption rates from water ice in the 120 150 k temperature range significance for noctilucent clouds |
| url | http://www.atmos-chem-phys.net/11/1729/2011/acp-11-1729-2011.pdf |
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