標題: | UV Absorption Cross Sections of ClOOCl Are Consistent with Ozone Degradation Models |
作者: | Chen, Hsueh-Ying Lien, Chien-Yu Lin, Wei-Yen Lee, Yuan T. Lin, Jim J. 應用化學系 Department of Applied Chemistry |
公開日期: | 8-五月-2009 |
摘要: | Recently, discrepancies in laboratory measurements of chlorine peroxide (ClOOCl) absorption cross sections have cast doubt on the validity of current photochemical models for stratospheric ozone degradation. Whereas previous ClOOCl absorption measurements all suffered from uncertainties due to absorption by impurities, we demonstrate here a method that uses mass-selected detection to circumvent such interference. The cross sections of ClOOCl were determined at two critical wavelengths (351 and 308 nanometers). Our results are sufficient to resolve the controversial issue originating from the ClOOCl laboratory cross sections and suggest that the highest laboratory estimates for atmospheric photolysis rates of ClOOCl, which best explain the field measurements via current chemical models, are reasonable. |
URI: | http://dx.doi.org/10.1126/science.1171305 http://hdl.handle.net/11536/7238 |
ISSN: | 0036-8075 |
DOI: | 10.1126/science.1171305 |
期刊: | SCIENCE |
Volume: | 324 |
Issue: | 5928 |
起始頁: | 781 |
結束頁: | 784 |
顯示於類別: | 期刊論文 |