Recent increases in global HFC‐23 emissions

  title={Recent increases in global HFC‐23 emissions},
  author={Stephen A. Montzka and Lambert J. M. Kuijpers and Mark Owen Battle and Murat Aydin and Kristal R. Verhulst and E. S. Saltzman and David W. Fahey},
  journal={Geophysical Research Letters},
Firn‐air and ambient air measurements of CHF3 (HFC‐23) from three excursions to Antarctica between 2001 and 2009 are used to construct a consistent Southern Hemisphere (SH) atmospheric history. The results show atmospheric mixing ratios of HFC‐23 continuing to increase through 2008. Mean global emissions derived from this data for 2006–2008 are 13.5 ± 2 Gg/yr (200 ± 30 × 1012 gCO2‐equivalent/yr, or MtCO2‐eq./yr), ∼50% higher than the 8.7 ± 1 Gg/yr (130 ± 15 MtCO2‐eq./yr) derived for the 1990s… 

Evidence for under‐reported western European emissions of the potent greenhouse gas HFC‐23

Western European emission inventories of the potent greenhouse gas trifluoromethane (HFC‐23) are validated at a country level by combining 2‐hourly atmospheric in‐situ measurements at Jungfraujoch

Recent increases in the atmospheric growth rate and emissions of HFC-23 (CHF 3 ) and the link to HCFC-22 (CHClF 2 ) production

Abstract. High frequency measurements of trifluoromethane (HFC-23, CHF3), a potent hydrofluorocarbon greenhouse gas, largely emitted to the atmosphere as a by-product of the production of the

First remote sensing observations of trifluoromethane (HFC-23) in the upper troposphere and lower stratosphere

[1] This work reports the first remote sensing measurements of atmospheric HFC-23 (CHF3) using solar occultation measurements made by the Atmospheric Chemistry Experiment Fourier transform

Global emissions of HFC-143a (CH3CF3) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations

Abstract. High-frequency, in situ observations from the Advanced Global Atmospheric Gases Experiment (AGAGE), for the period 2003 to 2012, combined with archive flask measurements dating back to

Recent trends in global emissions of hydrochlorofluorocarbons and hydrofluorocarbons: reflecting on the 2007 adjustments to the Montreal Protocol.

Global-scale atmospheric measurements are used to investigate the effectiveness of recent adjustments to production and consumption controls on hydrochlorofluorocarbons (HCFCs) under the Montreal Protocol and to assess recent projections of large increases in hydrofluorocarbon (HFC) production and emission.

Global Annual Mean Atmospheric Histories, Growth Rates and Seawater Solubility Estimations of the Halogenated Compounds HCFC-22, HCFC-141b, HCFC-142b, HFC-134a, HFC-125, HFC-23, PFC-14 and PFC-116

Abstract. We present consistent annual mean atmospheric histories and growth rates for the mainly anthropogenic halogenated compounds HCFC-22, HCFC-141b, HCFC-142b, HFC-134a, HFC-125, HFC-23, PFC-14

Regional atmospheric emissions determined from measurements at Jeju Island, Korea: Halogenated compounds from China

High‐frequency in‐situ measurements of a wide range of halogenated compounds including chlorofluorocarbons (CFCs), halons, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), perfluorinated

Inverse modelling of CF4 and NF3 emissions in East Asia

Abstract. Decadal trends in the atmospheric abundances of carbon tetrafluoride (CF4) and nitrogen trifluoride (NF3) have been well characterised and have provided a time series of global total

Historical greenhouse gas concentrations for climate modelling (CMIP6)

Abstract. Atmospheric greenhouse gas (GHG) concentrations are at unprecedented, record-high levels compared to the last 800 000 years. Those elevated GHG concentrations warm the planet and –

Interactive comment on “Global emissions of HFC-143a ( CH 3 CF 3 ) and HFC-32 ( CH 2 F 2 ) from in situ and air archive atmospheric observations” by O’Doherty et al.

On conclusions to be reconsidered: p. 6481-6482. The authors interpret changes in the ratio of mole fractions at Mace Head (56N) vs Cape Grim (40S) over time as suggesting that "the pattern of



Accelerated increases observed for hydrochlorofluorocarbons since 2004 in the global atmosphere

Tropospheric accumulation rates of the three most abundant hydrochlorofluorocarbons (HCFCs) were up to two times faster during 2007 than measured in 2003–2004. Tropospheric chlorine from HCFCs

Global tropospheric distribution and calibration scale of HCFC‐22

Measurements of atmospheric chlorodifluoro-methane (HCFC-22), based upon a new calibration scale developed in this laboratory, suggest a global tropospheric mean that is ∼28% lower than determined

Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn

A record of atmospheric CO2 mixing ratios from 1006 A.D. to 1978 A.D. has been produced by analysing the air enclosed in three ice cores from Law Dome, Antarctica. The enclosed air has unparalleled

Atmospheric trend and lifetime of chlorodifluoromethane (HCFC‐22) and the global tropospheric OH concentration

Concentrations of CHClF2 (HCFC-22) in clean background air collected at Cape Grim, Tasmania, over the period 1978–1996, and at La Jolla, California, over the period 1992–1997, have been measured by

Global emissions of HFC-23 estimated to year 2015

Atmospheric variability of methyl chloride during the last 300 years from an Antarctic ice core and firn air

Measurements of methyl chloride (CH3Cl) in Antarctic polar ice and firn air are used to describe the variability of atmospheric CH3Cl during the past 300 years. Firn air results from South Pole and

New observational constraints for atmospheric hydroxyl on global and hemispheric scales

These results set firm upper limits on the global and Southern Hemispheric lifetimes of methyl chloroform and confirm the predominance of hydroxyl in the tropics.

A history of chemically and radiatively important gases in air deduced from ALE/GAGE/AGAGE

We describe in detail the instrumentation and calibrations used in the Atmospheric Lifetime Experiment (ALE), the Global Atmospheric Gases Experiment (GAGE), and the Advanced Global Atmospheric Gases

Atmospheric gas concentrations over the past century measured in air from firn at the South Pole

The extraction and analysis of air from the snowpack (firn) at the South Pole provides atmospheric concentration histories of biogenic greenhouse gases since the beginning of the present century

Carbon and hydrogen isotopic composition of methane over the last 1000 years

New measurements of the carbon and hydrogen isotopic ratios of methane (δ13C of CH4 and δD of CH4) over the last millennium are presented from the WAIS Divide, Antarctica, ice core (WDC05A), showing