Zobrazeno 1 - 10
of 202
pro vyhledávání: '"G. C. Toon"'
Autor:
J. L. Laughner, G. C. Toon, J. Mendonca, C. Petri, S. Roche, D. Wunch, J.-F. Blavier, D. W. T. Griffith, P. Heikkinen, R. F. Keeling, M. Kiel, R. Kivi, C. M. Roehl, B. B. Stephens, B. C. Baier, H. Chen, Y. Choi, N. M. Deutscher, J. P. DiGangi, J. Gross, B. Herkommer, P. Jeseck, T. Laemmel, X. Lan, E. McGee, K. McKain, J. Miller, I. Morino, J. Notholt, H. Ohyama, D. F. Pollard, M. Rettinger, H. Riris, C. Rousogenous, M. K. Sha, K. Shiomi, K. Strong, R. Sussmann, Y. Té, V. A. Velazco, S. C. Wofsy, M. Zhou, P. O. Wennberg
Publikováno v:
Earth System Science Data, Vol 16, Pp 2197-2260 (2024)
The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs), beginning in 2004, from over 30 current or past measurement sites around the world using solar absorption spectroscopy in the
Externí odkaz:
https://doaj.org/article/f7c8ac9c19f04402af11e5fe7712405c
Autor:
F. Kolonjari, P. E. Sheese, K. A. Walker, C. D. Boone, D. A. Plummer, A. Engel, S. A. Montzka, D. E. Oram, T. Schuck, G. P. Stiller, G. C. Toon
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 2429-2449 (2024)
The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) is currently providing the only measurements of vertically resolved chlorodifluoromethane (HCFC-22) from space. This study assesses the ACE-FTS HCFC-22 v5.2 product in the
Externí odkaz:
https://doaj.org/article/3e5af882ecc844c6b217d69314f1bb1a
Autor:
H. A. Parker, J. L. Laughner, G. C. Toon, D. Wunch, C. M. Roehl, L. T. Iraci, J. R. Podolske, K. McKain, B. C. Baier, P. O. Wennberg
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 2601-2625 (2023)
We describe an approach for determining limited information about the vertical distribution of carbon monoxide (CO) and carbon dioxide (CO2) from total column ground-based Total Carbon Column Observation Network (TCCON) observations. For CO and CO2,
Externí odkaz:
https://doaj.org/article/ff2c84bd197a474baaad0b62ce43e9f4
Autor:
J. L. Laughner, S. Roche, M. Kiel, G. C. Toon, D. Wunch, B. C. Baier, S. Biraud, H. Chen, R. Kivi, T. Laemmel, K. McKain, P.-Y. Quéhé, C. Rousogenous, B. B. Stephens, K. Walker, P. O. Wennberg
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 1121-1146 (2023)
Optimal estimation retrievals of trace gas total columns require prior vertical profiles of the gases retrieved to drive the forward model and ensure the retrieval problem is mathematically well posed. For well-mixed gases, it is possible to derive a
Externí odkaz:
https://doaj.org/article/72250042be7741918eb2d1787b51066d
Autor:
M. Takeda, H. Nakajima, I. Murata, T. Nagahama, I. Morino, G. C. Toon, R. F. Weiss, J. Mühle, P. B. Krummel, P. J. Fraser, H.-J. Wang
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5955-5976 (2021)
We have developed a procedure for retrieving atmospheric abundances of HFC-23 (CHF3) with a ground-based Fourier transform infrared (FTIR) spectrometer and analyzed the spectra observed at Rikubetsu, Japan (43.5∘ N, 143.8∘ E), and at Syowa Statio
Externí odkaz:
https://doaj.org/article/a15e89d2ed9d4d71bdfc3f8506c9409b
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 10727-10743 (2021)
We report measurements of atmospheric C3H8 from analysis of ground-based solar absorption spectra from the Jet Propulsion Laboratory (JPL) MkIV interferometer. Using the strong Q-branch absorption feature at 2967 cm−1, we can measure C3H8 in locati
Externí odkaz:
https://doaj.org/article/11ba08d93da24064b9e6b1a4b45d93ea
Autor:
S. Roche, K. Strong, D. Wunch, J. Mendonca, C. Sweeney, B. Baier, S. C. Biraud, J. L. Laughner, G. C. Toon, B. J. Connor
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 3087-3118 (2021)
We evaluate vertical profile retrievals of CO2 from 0.02 cm−1 resolution ground-based near-infrared solar absorption spectra with the GFIT2 algorithm, using improved spectroscopic line lists and line shapes. With these improvements, CO2 profiles we
Externí odkaz:
https://doaj.org/article/5721fd4c9cfb4c0882a8be450bcd5fa2
Autor:
M. Prignon, S. Chabrillat, D. Minganti, S. O'Doherty, C. Servais, G. Stiller, G. C. Toon, M. K. Vollmer, E. Mahieu
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 12309-12324 (2019)
Hydrochlorofluorocarbons (HCFCs) are the first, but temporary, substitution products for the strong ozone-depleting chlorofluorocarbons (CFCs). HCFC consumption and production are currently regulated under the Montreal Protocol on Substances that Dep
Externí odkaz:
https://doaj.org/article/293503d1015b47a9b62de2089f594b34
Autor:
D. Wunch, D. B. A. Jones, G. C. Toon, N. M. Deutscher, F. Hase, J. Notholt, R. Sussmann, T. Warneke, J. Kuenen, H. Denier van der Gon, J. A. Fisher, J. D. Maasakkers
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 3963-3980 (2019)
Using five long-running ground-based atmospheric observatories in Europe, we demonstrate the utility of long-term, stationary, ground-based measurements of atmospheric total columns for verifying annual methane emission inventories. Our results indic
Externí odkaz:
https://doaj.org/article/a4e71b0302374b329048e60690db9102
Autor:
J. Mendonca, K. Strong, D. Wunch, G. C. Toon, D. A. Long, J. T. Hodges, V. T. Sironneau, J. E. Franklin
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 35-50 (2019)
High-resolution, laboratory, absorption spectra of the a1Δg←X3Σg- oxygen (O2) band measured using cavity ring-down spectroscopy were fitted using the Voigt and speed-dependent Voigt line shapes. We found that the speed-dependent Voigt line shape
Externí odkaz:
https://doaj.org/article/95db25398d784e62a501248d5ee0a035