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Akademický článek

Estimation of the atmospheric hydroxyl radical oxidative capacity using multiple hydrofluorocarbons (HFCs)

Autor: R. L. Thompson, S. A. Montzka, M. K. Vollmer, J. Arduini, M. Crotwell, P. B. Krummel, C. Lunder, J. Mühle, S. O'Doherty, R. G. Prinn, S. Reimann, I. Vimont, H. Wang, R. F. Weiss, D. Young

Publikováno v: Atmospheric Chemistry and Physics, Vol 24, Pp 1415-1427 (2024)

The hydroxyl radical (OH) largely determines the atmosphere's oxidative capacity and, thus, the lifetimes of numerous trace gases, including methane (CH4). Hitherto, observation-based approaches for estimating the atmospheric oxidative capacity have

Externí odkaz: https://doaj.org/article/0467fd6daab0449680c82033f964adfd

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Akademický článek

A rise in HFC-23 emissions from eastern Asia since 2015

Autor: H. Park, J. Kim, H. Choi, S. Geum, Y. Kim, R. L. Thompson, J. Mühle, P. K. Salameh, C. M. Harth, K. M. Stanley, S. O'Doherty, P. J. Fraser, P. G. Simmonds, P. B. Krummel, R. F. Weiss, R. G. Prinn, S. Park

Publikováno v: Atmospheric Chemistry and Physics, Vol 23, Pp 9401-9411 (2023)

Trifluoromethane (CHF3, HFC-23), one of the most potent greenhouse gases among hydrofluorocarbons (HFCs), is mainly emitted to the atmosphere as a by-product in the production of the ozone-depleting legacy refrigerant and chemical feedstock chlorodif

Externí odkaz: https://doaj.org/article/e4d1d5230ba84f958c338a7c1f6bd8b3

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Akademický článek

Modelling the growth of atmospheric nitrous oxide using a global hierarchical inversion

Autor: A. C. Stell, M. Bertolacci, A. Zammit-Mangion, M. Rigby, P. J. Fraser, C. M. Harth, P. B. Krummel, X. Lan, M. Manizza, J. Mühle, S. O'Doherty, R. G. Prinn, R. F. Weiss, D. Young, A. L. Ganesan

Publikováno v: Atmospheric Chemistry and Physics, Vol 22, Pp 12945-12960 (2022)

Nitrous oxide is a potent greenhouse gas (GHG) and ozone-depleting substance, whose atmospheric abundance has risen throughout the contemporary record. In this work, we carry out the first global hierarchical Bayesian inversion to solve for nitrous o

Externí odkaz: https://doaj.org/article/9045fc03616741c6842265fc38399ea1

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Akademický článek

A renewed rise in global HCFC-141b emissions between 2017–2021

Publikováno v: Atmospheric Chemistry and Physics, Vol 22, Pp 9601-9616 (2022)

Global emissions of the ozone-depleting gas HCFC-141b (1,1-dichloro-1-fluoroethane, CH3CCl2F) derived from measurements of atmospheric mole fractions increased between 2017 and 2021 despite a fall in reported production and consumption of HCFC-141b f

Externí odkaz: https://doaj.org/article/e50fa04da87b464688ba8f00d7a5fd19

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Akademický článek

Projections of hydrofluorocarbon (HFC) emissions and the resulting global warming based on recent trends in observed abundances and current policies

Autor: G. J. M. Velders, J. S. Daniel, S. A. Montzka, I. Vimont, M. Rigby, P. B. Krummel, J. Muhle, S. O'Doherty, R. G. Prinn, R. F. Weiss, D. Young

Publikováno v: Atmospheric Chemistry and Physics, Vol 22, Pp 6087-6101 (2022)

The emissions of hydrofluorocarbons (HFCs) have increased significantly in the past 2 decades, primarily as a result of the phaseout of ozone-depleting substances under the Montreal Protocol and the use of HFCs as their replacements. In 2015, large i

Externí odkaz: https://doaj.org/article/b8fe94db8ead47e0a24994ff7102e3f1

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Akademický článek

Global emissions of perfluorocyclobutane (PFC-318, c-C4F8) resulting from the use of hydrochlorofluorocarbon-22 (HCFC-22) feedstock to produce polytetrafluoroethylene (PTFE) and related fluorochemicals

Autor: J. Mühle, L. J. M. Kuijpers, K. M. Stanley, M. Rigby, L. M. Western, J. Kim, S. Park, C. M. Harth, P. B. Krummel, P. J. Fraser, S. O'Doherty, P. K. Salameh, R. Schmidt, D. Young, R. G. Prinn, R. H. J. Wang, R. F. Weiss

Publikováno v: Atmospheric Chemistry and Physics, Vol 22, Pp 3371-3378 (2022)

Emissions of the potent greenhouse gas perfluorocyclobutane (c-C4F8, PFC-318, octafluorocyclobutane) into the global atmosphere inferred from atmospheric measurements have been increasing sharply since the early 2000s. We find that these inferred emi

Externí odkaz: https://doaj.org/article/d916abea870245438ca54c0e4fe36eba

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Akademický článek

Global trends and European emissions of tetrafluoromethane (CF4), hexafluoroethane (C2F6) and octafluoropropane (C3F8)

Autor: D. Say, A. J. Manning, L. M. Western, D. Young, A. Wisher, M. Rigby, S. Reimann, M. K. Vollmer, M. Maione, J. Arduini, P. B. Krummel, J. Mühle, C. M. Harth, B. Evans, R. F. Weiss, R. G. Prinn, S. O'Doherty

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 2149-2164 (2021)

Perfluorocarbons (PFCs) are amongst the most potent greenhouse gases listed under the United Nations Framework Convention on Climate Change (UNFCCC). With atmospheric lifetimes on the order of thousands to tens of thousands of years, PFC emissions re

Externí odkaz: https://doaj.org/article/ca04a0f69cf94c6aa55fe7d0273d5fe5

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Akademický článek

The increasing atmospheric burden of the greenhouse gas sulfur hexafluoride (SF6)

Publikováno v: Atmospheric Chemistry and Physics, Vol 20, Pp 7271-7290 (2020)

We report a 40-year history of SF6 atmospheric mole fractions measured at the Advanced Global Atmospheric Gases Experiment (AGAGE) monitoring sites, combined with archived air samples, to determine emission estimates from 1978 to 2018. Previously we

Externí odkaz: https://doaj.org/article/840c637d99514a90b52c384dc9185c16

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Akademický článek

Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory

Autor: A. Andersson, E. N. Kirillova, S. Decesari, L. DeWitt, J. Gasore, K. E. Potter, R. G. Prinn, M. Rupakheti, J. de Dieu Ndikubwimana, J. Nkusi, B. Safari

Publikováno v: Atmospheric Chemistry and Physics, Vol 20, Pp 4561-4573 (2020)

Sub-Saharan Africa (SSA) is a global hot spot for aerosol emissions, which affect the regional climate and air quality. In this paper, we use ground-based observations to address the large uncertainties in the source-resolved emission estimation of c

Externí odkaz: https://doaj.org/article/2337aaeb56c74a53b5e163ab130e4c92

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Akademický článek

Increase in global emissions of HFC-23 despite near-total expected reductions

Autor: K. M. Stanley, D. Say, J. Mühle, C. M. Harth, P. B. Krummel, D. Young, S. J. O’Doherty, P. K. Salameh, P. G. Simmonds, R. F. Weiss, R. G. Prinn, P. J. Fraser, M. Rigby

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-6 (2020)

International agreements have been implemented to reduce emissions of hydrofluorocarbons (HFCs) to reduce their radiative forcing. Even though reported HFC-23 emissions are at a historical low, observations indicate that emissions have actually incre

Externí odkaz: https://doaj.org/article/f9a0846291814291bd518aaaf5bed105

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