| DOI: | 10.1002/2015GL066219
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| 论文题名: | Wavelength-dependent isotope fractionation in visible light O3 photolysis and atmospheric implications |
| 作者: | Früchtl M.; Janssen C.; Taraborrelli D.; Gromov S.; Röckmann T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9174
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| EISSN: | 1944-8905
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| 出版年: | 2015
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| 卷: | 42, 期:20 | | 起始页码: | 8711
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| 结束页码: | 8718
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| 语种: | 英语
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| 英文关键词: | isotope effects in visible O3 photolysis
; wavelength dependence of isotope effects
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| Scopus关键词: | Carrier mobility
; Fractionation
; Isotopes
; Light sources
; Photolysis
; Absorption cross sections
; Atmospheric implications
; Broadband Light Sources
; Fractionation patterns
; Isotope effect
; Isotope fractionation
; Theoretical calculations
; Wavelength dependence
; Light
; absorption
; atmospheric modeling
; isotopic fractionation
; light availability
; numerical model
; oxygen
; ozone
; photolysis
; troposphere
; visible spectrum
; wavelength
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| 英文摘要: | The 17O and 18O isotope fractionation associated with photolysis of O3 in the Chappuis band was determined using a broadband light source with cutoff filters at 455, 550, and 620 nm and narrowband light sources at 530, 617, and 660 nm. The isotope effects follow a mass-dependent fractionation pattern (δ17O/δ18O = 0.53). Contrary to theoretical predictions, fractionations are negative for all wavelength ranges investigated and do not change signs at the absorption cross-section maximum. Our measurements differ from theoretical calculations by as much as 34‰ in εO3+hν18 = (18J/16J - 1). The wavelength dependence is also weaker than predicted. Photo-induced fractionation is strongest when using a low-wavelength cutoff at 620 nm with εO3+hν18 = -26.9(±1.4)‰. With decreasing wavelength, fractionation values diminish to εO3+hν18 = -12.9(±1.3)‰ at 530 nm. Results from an atmospheric model demonstrate that visible light photolysis is the most important tropospheric sink of O3, which thus contributes about one sixth to the ozone enrichment. Key Points Visible light photolysis of O3 leads to isotope enrichment of the remaining O3 Fractionation in visible light photolysis of O3 is wavelength dependent The wavelength dependence is weaker than predicted by theory © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946606824&doi=10.1002%2f2015GL066219&partnerID=40&md5=d1f217c9aab5f472de3a770d130b597f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8790
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands
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| Recommended Citation: | |
Früchtl M.,Janssen C.,Taraborrelli D.,et al. Wavelength-dependent isotope fractionation in visible light O3 photolysis and atmospheric implications[J]. Geophysical Research Letters,2015-01-01,42(20).
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