TY  - JOUR
A1  - Manning, Alistair J.
A1  - Redington, Alison L.
A1  - Say, Daniel
A1  - O'Doherty, Simon
A1  - Young, Dickon
A1  - Simonsen, Peter G.
A1  - Vollmer, Martin K.
A1  - Mühle, Jens
A1  - Arduini, Jgor
A1  - Spain, Gerard
A1  - Wisher, Adam
A1  - Maione, Michela
A1  - Schuck, Tanja J.
A1  - Stanley, Kieran
A1  - Reimann, Stefan
A1  - Engel, Andreas
A1  - Krummel, Paul B.
A1  - Fraser, Paul J.
A1  - Harth, Christina M.
A1  - Salameh, Peter K.
A1  - Weiss, Ray F.
A1  - Gluckman, Ray
A1  - Brown, Peter N.
A1  - Watterson, John D.
A1  - Arnold, Tim
T1  - Evidence of a recent decline in UK emissions of hydrofluorocarbons determined by the InTEM inverse model and atmospheric measurements
T2  - Atmospheric chemistry and physics discussions
N2  - National Greenhouse Gas Inventories (GHGI) are submitted annually to the United Nations Framework Convention on Climate Change (UNFCCC). They are estimated in compliance with Intergovernmental Panel on Climate Change (IPCC) methodological guidance using activity data, emission factors and facility-level measurements. For some sources, the outputs from these calculations are very uncertain. Inverse modelling techniques that use high-quality, long-term measurements of atmospheric gases have been developed to provide independent verification of national GHGI. This is considered good practice by the IPCC as it helps national inventory compilers to verify reported emissions and to reduce emission uncertainty. Emission estimates from the InTEM (Inversion Technique for Emissions Modelling) model are presented for the UK for the hydrofluorocarbons (HFCs) reported to the UNFCCC (HFC-125, HFC-134a, HFC-143a, HFC-152a, HFC-23, HFC-32, HFC-227ea, HFC-245fa, HFC-43-10mee and HFC-365mfc). These HFCs have high Global Warming Potentials (GWPs) and the global background mole fractions of all but two are increasing, thus highlighting their relevance to the climate and a need for increasing the accuracy of emission estimation for regulatory purposes. This study presents evidence that the long-term annual increase in growth of HFC-134a has stopped and is now decreasing. For HFC-32 there is an early indication its rapid global growth period has ended, and there is evidence that the annual increase in global growth for HFC-125 has slowed from 2018. The inverse modelling results indicate that the UK implementation of European Union regulation of HFC emissions has been successful in initiating a decline in UK emissions in the since 2018. Comparison of the total InTEM UK HFC emissions in 2020 with the average from 2009–2012 shows a drop of 35%, indicating progress toward the target of a 79% decrease in sales by 2030. The total InTEM HFC emission estimates (2008–2018) are on average 73 (62–83)% of, or 4.3 (2.7–5.9) Tg CO2-eq yr−1 lower than, the total HFC emission estimates from the UK GHGI inventory. There are also significant discrepancies between the two estimates for the individual HFCs.
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62744
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-627449
SN  - 1680-7375
N1  - UK Department of Business, Energy and Industrial Strategy (BEIS) (Contract number: TRN 1537/06/2018). Science, Technology, Research & Innovation for the Environment (STRIVE) Programme 2007 – 2013 Climate Change Research Programme (CCRP 2006–2013), Irish EPA (Project Number 07-CCRP-1.1.5a). The Commonwealth Scientific and Industrial Research Organisation (CSIRO, Australia) and Bureau of Meteorology (Australia) are thanked for their ongoing long-term support and funding of the Cape Grim station and the Cape Grim science programme. The operation and calibration of the global AGAGE measurement network are supported by NASA’s Upper Atmosphere Research Program through grants NAG5-12669, NNX07AE89G, NNX11AF17G, and NNX16AC98G (to MIT) and NNX07AE87G, NNX07AF09G, NNX11AF15G, and NNX11AF16G (to SIO). Additional support for operation of the station at Ragged Point, Barbados was provided by National Oceanic and Atmospheric Administration (NOAA) Contracts RA-133-R15-CN-0008 and 1305M319CNRMJ0028 (to the University of Bristol). Financial support for the Jungfraujoch measurements is acknowledged from the Swiss national program CLIMGAS-CH (Swiss Federal Office for the Environment, FOEN) and from ICOS-CH (Integrated Carbon Observation System Research Infrastructure). Support for the Jungfraujoch station was provided by International Foundation High Altitude Research Stations Jungfraujoch and Gornergrat (HFSJG).
N1  - Begutachteter Artikel erschienen in: Atmospheric chemistry and physics, Nr. 21. 2021, S. 12739–12755, doi: 10.5194/acp-21-12739-2021
VL  - 21
SP  - 1
EP  - 26
PB  - EGU
CY  - Katlenburg-Lindau
ER  -