Changes in the levels and variability of halocarbons and the compliance with the Montreal Protocol from an urban view
Ou-Yang, CF; Chang, CC; Chen, SPo; Chew, C; Lee, B; Chang, CY; Montzka, SA; Dutton, GS; Butler, JH; Elkins, JW; Wang, J
HERO ID
3077618
Reference Type
Journal Article
Year
2015
Language
English
PMID
| HERO ID | 3077618 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Changes in the levels and variability of halocarbons and the compliance with the Montreal Protocol from an urban view |
| Authors | Ou-Yang, CF; Chang, CC; Chen, SPo; Chew, C; Lee, B; Chang, CY; Montzka, SA; Dutton, GS; Butler, JH; Elkins, JW; Wang, J |
| Journal | Chemosphere |
| Volume | 138 |
| Page Numbers | 438-446 |
| Abstract | Ambient levels and variability of major atmospheric halocarbons, i.e. CFC-12, CFC-11, CFC-113, CCl4, CH3CCl3, C2HCl3, and C2Cl4 in a major metropolis (Taipei, Taiwan) were re-investigated after fourteen years by flask sampling in 2012. Our data indicates that the variability expressed as standard deviations (SD) of CFC-113 and CCl4 remained small (2.0 ppt and 1.9 ppt, respectively) for the 10th-90th percentile range in both sampling periods; whereas the variability of CFC-12, CFC-11, C2HCl3, and C2Cl4 measured in 2012 became noticeably smaller than observed in 1998, suggesting their emissions were reduced over time. By comparing with the background data of a global network (NOAA/ESRL/GMD baseline observatories), the ambient levels and distribution of these major halocarbons in Taipei approximated those at a background site (Mauna Loa) in 2012, suggesting that the fingerprint of the major halocarbons in a used-to-be prominent source area has gradually approached to that of the background atmosphere. |
| Doi | 10.1016/j.chemosphere.2015.06.070 |
| Pmid | 26160300 |
| Wosid | WOS:000361772800060 |
| Url | https://www.proquest.com/scholarly-journals/changes-levels-variability-halocarbons-compliance/docview/1711544855/se-2?accountid=171501 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN:Scopus URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940929797&doi=10.1016%2fj.chemosphere.2015.06.070&partnerID=40&md5=6a6199345ec6dd6ed3688884a7b37a56 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Montreal Protocol; Halocarbons; Ozone-depleting substances (ODS); Variability |