Zobrazeno 1 - 10
of 84
pro vyhledávání: '"R. G. Derwent"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 13613-13623 (2023)
Elevated tropospheric ozone concentrations driven by anthropogenic precursor emissions are an environmental hazard scientifically similar to the depletion of the stratospheric ozone layer and global climate change; however, the tropospheric ozone iss
Externí odkaz:
https://doaj.org/article/4ec67feb749f4e2b9f24e79899bbb738
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 14243-14252 (2022)
Compared with 2019, measurements of the global growth rate of background (marine air) atmospheric methane rose by 5.3 ppb yr−1 in 2020, reaching 15.0 ppb yr−1. Global atmospheric chemistry models have previously shown that reductions in nitrogen
Externí odkaz:
https://doaj.org/article/9492f0c334d04fd193ccbc9cdfaa12ce
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 13423-13430 (2022)
A nonlinear change in baseline ozone concentrations at northern midlatitudes has been quantified over preceding decades. During the past few years, several studies, using linear trend analyses, report relatively small trends over selected time period
Externí odkaz:
https://doaj.org/article/fc4b8fb17c9b4788ab1f10f306dc8917
Autor:
D. D. Parrish, R. G. Derwent, S. T. Turnock, F. M. O'Connor, J. Staehelin, S. E. Bauer, M. Deushi, N. Oshima, K. Tsigaridis, T. Wu, J. Zhang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 9669-9679 (2021)
Our quantitative understanding of natural tropospheric ozone concentrations is limited by the paucity of reliable measurements before the 1980s. We utilize the existing measurements to compare the long-term ozone changes that occurred within the mari
Externí odkaz:
https://doaj.org/article/e954614c4d244a29a36131e7d27b3e3f
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 3383-3394 (2019)
We present an approach for deriving a systematic mathematical representation of the statistically significant features of the average long-term changes and seasonal cycle of concentrations of trace tropospheric species. The results for two illustrati
Externí odkaz:
https://doaj.org/article/aab491baa8f54667bf8c97574d13df29
Autor:
K. M. Stanley, A. Grant, S. O'Doherty, D. Young, A. J. Manning, A. R. Stavert, T. G. Spain, P. K. Salameh, C. M. Harth, P. G. Simmonds, W. T. Sturges, D. E. Oram, R. G. Derwent
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 1437-1458 (2018)
A network of three tall tower measurement stations was set up in 2012 across the United Kingdom to expand measurements made at the long-term background northern hemispheric site, Mace Head, Ireland. Reliable and precise in situ greenhouse gas (GHG
Externí odkaz:
https://doaj.org/article/6d800998060140668d925b4d71fa1cda
Autor:
K. E. Leather, M. R. McGillen, M. C. Cooke, S. R. Utembe, A. T. Archibald, M. E. Jenkin, R. G. Derwent, D. E. Shallcross, C. J. Percival
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 1, Pp 469-479 (2012)
Gas-phase ethene ozonolysis experiments were conducted at room temperature to determine formic acid yields as a function of relative humidity (RH) using the integrated EXTreme RAnge chamber-Chemical Ionisation Mass Spectrometry technique, employing a
Externí odkaz:
https://doaj.org/article/18a2f40981f44474805ee29d1ce306d0
Autor:
A. Grant, E. L. Yates, P. G. Simmonds, R. G. Derwent, A. J. Manning, D. Young, D. E. Shallcross, S. O'Doherty
Publikováno v:
Atmospheric Measurement Techniques, Vol 4, Iss 5, Pp 955-964 (2011)
Continuous high-frequency in situ measurements of a range of non-methane hydrocarbons have been made at Mace Head since January 2005. Mace Head is a background Northern Hemispheric site situated on the eastern edge of the Atlantic. Five year measurem
Externí odkaz:
https://doaj.org/article/e6e7e0c3144341d7a405b741dd374294
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 17, Pp 8097-8118 (2010)
Recently reported model-measurement discrepancies for the concentrations of the HOx radical species (OH and HO2) in locations characterized by high emission rates of isoprene have indicated possible deficiencies in the representation of OH recycling
Externí odkaz:
https://doaj.org/article/9c4b17a7fb0b43f185071868da30ede6
Autor:
D. Johnson, S. R. Utembe, M. E. Jenkin, R. G. Derwent, G. D. Hayman, M. R. Alfarra, H. Coe, G. McFiggans
Publikováno v:
Atmospheric Chemistry and Physics, Vol 6, Iss 2, Pp 403-418 (2006)
A photochemical trajectory model has been used to simulate the chemical evolution of air masses arriving at the TORCH field campaign site in the southern UK during late July and August 2003, a period which included a widespread and prolonged photoche
Externí odkaz:
https://doaj.org/article/e3dea363568e4dbbb190c40677712fc2