Projects per year
Abstract
High-frequency, in situ global observations of HCFC-22 (CHClF2), HCFC-141b (CH3CCl2F), HCFC-142b (CH3CClF2) and HCFC-124 (CHClFCF3) and their main HFC replacements, HFC-134a (CH2FCF3), HFC-125 (CHF2CF3), HFC-143a (CH3CF3) and HFC-32 (CH2F2), have been used to determine their changing global growth rates and emissions in response to the Montreal Protocol and its recent amendments. Global mean mole fractions of HCFC-22, -141b, and -142b have increased throughout the observation period, reaching 234, 24.3 and 22.4 pmol mol−1, respectively, in 2015. HCFC-124 reached a maximum global mean mole fraction of 1.48 pmol mol−1 in 2007 and has since declined by 23 % to 1.14 pmol mol−1 in 2015. The HFCs all show increasing global mean mole fractions. In 2015 the global mean mole fractions (pmol mol−1) were 83.3 (HFC-134a), 18.4 (HFC-125), 17.7 (HFC-143a) and 10.5 (HFC-32).
Original language | English |
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Pages (from-to) | 4641-4655 |
Number of pages | 15 |
Journal | Atmospheric Chemistry and Physics |
Volume | 17 |
Issue number | 7 |
DOIs | |
Publication status | Published - 10 Apr 2017 |
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Dive into the research topics of 'Changing trends and emissions of hydrochlorofluorocarbons (HCFCs) and their hydrofluorocarbon (HFCs) replacements'. Together they form a unique fingerprint.Projects
- 3 Finished
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Advanced computing architecture to support the estimation and reporting of UK GHG emissions
13/11/13 → 13/10/15
Project: Research
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Towards treaty verification of all non-CO2 greenhouse gasses - Dr Matthew Rigby
1/01/12 → 31/12/16
Project: Research