Zobrazeno 1 - 10
of 22
pro vyhledávání: '"T. J. Griffis"'
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 21, Pp n/a-n/a (2024)
Abstract Agriculture is the dominant source of anthropogenic nitrous oxide (N2O) –a greenhouse gas and a stratospheric ozone depleting substance. The US Corn Belt is a large global N2O source, but there remain large uncertainties regarding its sour
Externí odkaz:
https://doaj.org/article/b2aa9952a12b42b7b5092c403ae1d199
Autor:
L. Liu, S. Xu, J. Tang, K. Guan, T. J. Griffis, M. D. Erickson, A. L. Frie, X. Jia, T. Kim, L. T. Miller, B. Peng, S. Wu, Y. Yang, W. Zhou, V. Kumar, Z. Jin
Publikováno v:
Geoscientific Model Development, Vol 15, Pp 2839-2858 (2022)
Agricultural nitrous oxide (N2O) emission accounts for a non-trivial fraction of global greenhouse gas (GHG) budget. To date, estimating N2O fluxes from cropland remains a challenging task because the related microbial processes (e.g., nitrification
Externí odkaz:
https://doaj.org/article/1470695bda4346ceb7193157b0d60eae
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 10015-10037 (2021)
The atmospheric carbon dioxide (CO2) mixing ratio and its carbon isotope (δ13C-CO2) composition contain important CO2 sink and source information spanning from ecosystem to global scales. The observation and simulation for both CO2 and δ13C-CO2 can
Externí odkaz:
https://doaj.org/article/71a6532c98174870b8ba599b845b34c6
Autor:
X. Yu, D. B. Millet, K. C. Wells, D. K. Henze, H. Cao, T. J. Griffis, E. A. Kort, G. Plant, M. J. Deventer, R. K. Kolka, D. T. Roman, K. J. Davis, A. R. Desai, B. C. Baier, K. McKain, A. C. Czarnetzki, A. A. Bloom
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 951-971 (2021)
We apply airborne measurements across three seasons (summer, winter and spring 2017–2018) in a multi-inversion framework to quantify methane emissions from the US Corn Belt and Upper Midwest, a key agricultural and wetland source region. Combing ou
Externí odkaz:
https://doaj.org/article/67f17a2566a44508b2c116929890ee52
Autor:
K. C. Wells, D. B. Millet, N. Bousserez, D. K. Henze, T. J. Griffis, S. Chaliyakunnel, E. J. Dlugokencky, E. Saikawa, G. Xiang, R. G. Prinn, S. O'Doherty, D. Young, R. F. Weiss, G. S. Dutton, J. W. Elkins, P. B. Krummel, R. Langenfelds, L. P. Steele
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 735-756 (2018)
We present top-down constraints on global monthly N2O emissions for 2011 from a multi-inversion approach and an ensemble of surface observations. The inversions employ the GEOS-Chem adjoint and an array of aggregation strategies to test how well c
Externí odkaz:
https://doaj.org/article/7b6df3c886924a1fa82ae76d06187e99
Autor:
T. J. Griffis, J. D. Wood, J. M. Baker, X. Lee, K. Xiao, Z. Chen, L. R. Welp, N. M. Schultz, G. Gorski, M. Chen, J. Nieber
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 5139-5157 (2016)
Increasing atmospheric humidity and convective precipitation over land provide evidence of intensification of the hydrologic cycle – an expected response to surface warming. The extent to which terrestrial ecosystems modulate these hydrologic f
Externí odkaz:
https://doaj.org/article/7b8d237d2ebe49b096ca9cd41555fdb7
Autor:
K. C. Wells, D. B. Millet, N. Bousserez, D. K. Henze, S. Chaliyakunnel, T. J. Griffis, Y. Luan, E. J. Dlugokencky, R. G. Prinn, S. O'Doherty, R. F. Weiss, G. S. Dutton, J. W. Elkins, P. B. Krummel, R. Langenfelds, L. P. Steele, E. A. Kort, S. C. Wofsy, T. Umezawa
Publikováno v:
Geoscientific Model Development, Vol 8, Iss 10, Pp 3179-3198 (2015)
We describe a new 4D-Var inversion framework for nitrous oxide (N2O) based on the GEOS-Chem chemical transport model and its adjoint, and apply it in a series of observing system simulation experiments to assess how well N2O sources and sinks can be
Externí odkaz:
https://doaj.org/article/1854a77753d444308dfee58167c2288b
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 19, Pp 10705-10719 (2014)
Quantification of regional greenhouse gas (GHG) fluxes is essential for establishing mitigation strategies and evaluating their effectiveness. Here, we used multiple top-down approaches and multiple trace gas observations at a tall tower to estimate
Externí odkaz:
https://doaj.org/article/761594b8256846aa95315da3570650a2
Autor:
L. Hu, D. B. Millet, S. Y. Kim, K. C. Wells, T. J. Griffis, E. V. Fischer, D. Helmig, J. Hueber, A. J. Curtis
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 6, Pp 3379-3392 (2013)
We apply a full year of continuous atmospheric acetone measurements from the University of Minnesota tall tower Trace Gas Observatory (KCMP tall tower; 244 m a.g.l.), with a 0.5° × 0.667° GEOS-Chem nested grid simulation to develop quantitative ne
Externí odkaz:
https://doaj.org/article/db5f05758472491bb5c43ca4e7bf222f
Publikováno v:
Atmospheric Chemistry and Physics, Vol 11, Iss 21, Pp 11145-11156 (2011)
We present over one year (January 2010–February 2011) of continuous atmospheric methanol measurements from the University of Minnesota tall tower Trace Gas Observatory (KCMP tall tower; 244 m a.g.l.), and interpret the dataset in terms of constrain
Externí odkaz:
https://doaj.org/article/b549b33d2f624cb89bae1fdbdef505d5