Zobrazeno 1 - 10
of 206
pro vyhledávání: '"C Zellweger"'
Autor:
L. Kirago, Ö. Gustafsson, S. M. Gaita, S. L. Haslett, M. J. Gatari, M. E. Popa, T. Röckmann, C. Zellweger, M. Steinbacher, J. Klausen, C. Félix, D. Njiru, A. Andersson
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 14349-14357 (2023)
Carbon monoxide (CO) concentrations in the troposphere are decreasing globally, with Africa as an exception. Yet, the region is understudied, with a deficit of ground-based observations and highly uncertain CO emission inventories. This paper reports
Externí odkaz:
https://doaj.org/article/cbbde4f044c14e4490a2dafd50665d95
Autor:
R. E. Hill-Pearce, A. Hillier, E. Mussell Webber, K. Charoenpornpukdee, S. O'Doherty, J. Mohn, C. Zellweger, D. R. Worton, P. J. Brewer
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5447-5458 (2021)
The precise measurement of the amount fraction of atmospheric nitrous oxide (N2O) is required to understand global emission trends. Analysis of the site-specific stable isotopic composition of N2O provides a means to differentiate emission sources. T
Externí odkaz:
https://doaj.org/article/01b0bb776c3f4f319d54601a8a3b081d
Autor:
L. Yu, E. Harris, S. Henne, S. Eggleston, M. Steinbacher, L. Emmenegger, C. Zellweger, J. Mohn
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 6495-6519 (2020)
Atmospheric nitrous oxide (N2O) levels have been continuously growing since preindustrial times. Mitigation requires information about sources and sinks on the regional and global scales. Isotopic composition of N2O in the atmosphere could contribute
Externí odkaz:
https://doaj.org/article/68870b41840b43b5b4395d736aeb7bd1
Autor:
C. Zellweger, R. Steinbrecher, O. Laurent, H. Lee, S. Kim, L. Emmenegger, M. Steinbacher, B. Buchmann
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 5863-5878 (2019)
Carbon monoxide (CO) and nitrous oxide (N2O) are two key parameters in the observation of the atmosphere, relevant to air quality and climate change, respectively. For CO, various analytical techniques have been in use over the last few decades. In c
Externí odkaz:
https://doaj.org/article/35613a3c5d2f4fee9c3c2ac6e00189c4
Autor:
A. M. Fiore, E. V. Fischer, G. P. Milly, S. Pandey Deolal, O. Wild, D. A. Jaffe, J. Staehelin, O. E. Clifton, D. Bergmann, W. Collins, F. Dentener, R. M. Doherty, B. N. Duncan, B. Fischer, S. Gilge, P. G. Hess, L. W. Horowitz, A. Lupu, I. A. MacKenzie, R. Park, L. Ries, M. G. Sanderson, M. G. Schultz, D. T. Shindell, M. Steinbacher, D. S. Stevenson, S. Szopa, C. Zellweger, G. Zeng
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 15345-15361 (2018)
Abundance-based model evaluations with observations provide critical tests for the simulated mean state in models of intercontinental pollution transport, and under certain conditions may also offer constraints on model responses to emission chang
Externí odkaz:
https://doaj.org/article/3789fd17bc664749b89b3e59cd751f26
Autor:
C. Zellweger, L. Emmenegger, M. Firdaus, J. Hatakka, M. Heimann, E. Kozlova, T. G. Spain, M. Steinbacher, M. V. van der Schoot, B. Buchmann
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 9, Pp 4737-4757 (2016)
Until recently, atmospheric carbon dioxide (CO2) and methane (CH4) measurements were made almost exclusively using nondispersive infrared (NDIR) absorption and gas chromatography with flame ionisation detection (GC/FID) techniques, respectively. Rece
Externí odkaz:
https://doaj.org/article/bd3a14c157dd49d69c67c43712436e38
Autor:
S. Eyer, B. Tuzson, M. E. Popa, C. van der Veen, T. Röckmann, M. Rothe, W. A. Brand, R. Fisher, D. Lowry, E. G. Nisbet, M. S. Brennwald, E. Harris, C. Zellweger, L. Emmenegger, H. Fischer, J. Mohn
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 1, Pp 263-280 (2016)
In situ and simultaneous measurement of the three most abundant isotopologues of methane using mid-infrared laser absorption spectroscopy is demonstrated. A field-deployable, autonomous platform is realized by coupling a compact quantum cascade laser
Externí odkaz:
https://doaj.org/article/10b1bb08679347d19c4e78e401debbdf
Autor:
L M Jungblut, J E Walter, C Zellweger, M Patella, D Franzen, D Schneiter, A Matter, T Frauenfelder, I Opitz
Publikováno v:
British Journal of Surgery. 109
Objective Low-dose computed tomography (LDCT) lung cancer screening is endorsed by US guidelines and has recently been shown effective in a large European randomized controlled trial. Nevertheless, actual realization of a lung cancer screening progra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6847880761eeef5859463e52daecf5ff
https://doi.org/10.1093/bjs/znac185.002
https://doi.org/10.1093/bjs/znac185.002
Autor:
C. W. Rella, H. Chen, A. E. Andrews, A. Filges, C. Gerbig, J. Hatakka, A. Karion, N. L. Miles, S. J. Richardson, M. Steinbacher, C. Sweeney, B. Wastine, C. Zellweger
Publikováno v:
Atmospheric Measurement Techniques, Vol 6, Iss 3, Pp 837-860 (2013)
Traditional techniques for measuring the mole fractions of greenhouse gases in the well-mixed atmosphere have required dry sample gas streams (dew point < −25 °C) to achieve the inter-laboratory compatibility goals set forth by the Global Atmosphe
Externí odkaz:
https://doaj.org/article/34cb99a452f94a46b640d03619080a45
Publikováno v:
Atmospheric Measurement Techniques, Vol 5, Iss 10, Pp 2555-2567 (2012)
Long-term time series of the atmospheric composition are essential for environmental research and thus require compatible, multi-decadal monitoring activities. The current data quality objectives of the World Meteorological Organization (WMO) for car
Externí odkaz:
https://doaj.org/article/b78f7b7f35f24b05bb76417fd7d2d9d5