Articles | Volume 17, issue 13
Atmos. Chem. Phys., 17, 8313–8341, 2017
https://doi.org/10.5194/acp-17-8313-2017
Atmos. Chem. Phys., 17, 8313–8341, 2017
https://doi.org/10.5194/acp-17-8313-2017
Research article
07 Jul 2017
Research article | 07 Jul 2017

Carbon dioxide and methane measurements from the Los Angeles Megacity Carbon Project – Part 1: calibration, urban enhancements, and uncertainty estimates

Kristal R. Verhulst et al.

Related authors

Greenhouse gas observations from the Northeast Corridor tower network
Anna Karion, William Callahan, Michael Stock, Steve Prinzivalli, Kristal R. Verhulst, Jooil Kim, Peter K. Salameh, Israel Lopez-Coto, and James Whetstone
Earth Syst. Sci. Data, 12, 699–717, https://doi.org/10.5194/essd-12-699-2020,https://doi.org/10.5194/essd-12-699-2020, 2020
Short summary
Vista-LA: Mapping methane-emitting infrastructure in the Los Angeles megacity
Valerie Carranza, Talha Rafiq, Isis Frausto-Vicencio, Francesca M. Hopkins, Kristal R. Verhulst, Preeti Rao, Riley M. Duren, and Charles E. Miller
Earth Syst. Sci. Data, 10, 653–676, https://doi.org/10.5194/essd-10-653-2018,https://doi.org/10.5194/essd-10-653-2018, 2018
Short summary
Methane emissions from dairies in the Los Angeles Basin
Camille Viatte, Thomas Lauvaux, Jacob K. Hedelius, Harrison Parker, Jia Chen, Taylor Jones, Jonathan E. Franklin, Aijun J. Deng, Brian Gaudet, Kristal Verhulst, Riley Duren, Debra Wunch, Coleen Roehl, Manvendra K. Dubey, Steve Wofsy, and Paul O. Wennberg
Atmos. Chem. Phys., 17, 7509–7528, https://doi.org/10.5194/acp-17-7509-2017,https://doi.org/10.5194/acp-17-7509-2017, 2017
Short summary

Related subject area

Subject: Gases | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Tropical peat fire emissions: 2019 field measurements in Sumatra and Borneo and synthesis with previous studies
Robert J. Yokelson, Bambang H. Saharjo, Chelsea E. Stockwell, Erianto I. Putra, Thilina Jayarathne, Acep Akbar, Israr Albar, Donald R. Blake, Laura L. B. Graham, Agus Kurniawan, Simone Meinardi, Diah Ningrum, Ati D. Nurhayati, Asmadi Saad, Niken Sakuntaladewi, Eko Setianto, Isobel J. Simpson, Elizabeth A. Stone, Sigit Sutikno, Andri Thomas, Kevin C. Ryan, and Mark A. Cochrane
Atmos. Chem. Phys., 22, 10173–10194, https://doi.org/10.5194/acp-22-10173-2022,https://doi.org/10.5194/acp-22-10173-2022, 2022
Short summary
Sulfuric acid in the Amazon basin: measurements and evaluation of existing sulfuric acid proxies
Deanna C. Myers, Saewung Kim, Steven Sjostedt, Alex B. Guenther, Roger Seco, Oscar Vega Bustillos, Julio Tota, Rodrigo A. F. Souza, and James N. Smith
Atmos. Chem. Phys., 22, 10061–10076, https://doi.org/10.5194/acp-22-10061-2022,https://doi.org/10.5194/acp-22-10061-2022, 2022
Short summary
Seasonal variation in oxygenated organic molecules in urban Beijing and their contribution to secondary organic aerosol
Yishuo Guo, Chao Yan, Yuliang Liu, Xiaohui Qiao, Feixue Zheng, Ying Zhang, Ying Zhou, Chang Li, Xiaolong Fan, Zhuohui Lin, Zemin Feng, Yusheng Zhang, Penggang Zheng, Linhui Tian, Wei Nie, Zhe Wang, Dandan Huang, Kaspar R. Daellenbach, Lei Yao, Lubna Dada, Federico Bianchi, Jingkun Jiang, Yongchun Liu, Veli-Matti Kerminen, and Markku Kulmala
Atmos. Chem. Phys., 22, 10077–10097, https://doi.org/10.5194/acp-22-10077-2022,https://doi.org/10.5194/acp-22-10077-2022, 2022
Short summary
Oxygenated volatile organic compounds (VOCs) as significant but varied contributors to VOC emissions from vehicles
Sihang Wang, Bin Yuan, Caihong Wu, Chaomin Wang, Tiange Li, Xianjun He, Yibo Huangfu, Jipeng Qi, Xiao-Bing Li, Qing'e Sha, Manni Zhu, Shengrong Lou, Hongli Wang, Thomas Karl, Martin Graus, Zibing Yuan, and Min Shao
Atmos. Chem. Phys., 22, 9703–9720, https://doi.org/10.5194/acp-22-9703-2022,https://doi.org/10.5194/acp-22-9703-2022, 2022
Short summary
The impacts of wildfires on ozone production and boundary layer dynamics in California's Central Valley
Keming Pan and Ian C. Faloona
Atmos. Chem. Phys., 22, 9681–9702, https://doi.org/10.5194/acp-22-9681-2022,https://doi.org/10.5194/acp-22-9681-2022, 2022
Short summary

Cited articles

Allan, D. W.: Statistics of Atomic Frequency Standards, Proc. IEEE, 54, 221–230, https://doi.org/10.1109/PROC.1966.4634, 1966.
Allan, D. W.: Time and frequency (time-domain) characterization estimation and prediction of precision clocks and oscillators, IEEE Trans. Ultrason. Ferr., 34, 647–654, 1987.
Andrews, A. E., Kofler, J. D., Trudeau, M. E., Williams, J. C., Neff, D. H., Masarie, K. A., Chao, D. Y., Kitzis, D. R., Novelli, P. C., Zhao, C. L., Dlugokencky, E. J., Lang, P. M., Crotwell, M. J., Fischer, M. L., Parker, M. J., Lee, J. T., Baumann, D. D., Desai, A. R., Stanier, C. O., De Wekker, S. F. J., Wolfe, D. E., Munger, J. W., and Tans, P. P.: CO2, CO, and CH4 measurements from tall towers in the NOAA Earth System Research Laboratory's Global Greenhouse Gas Reference Network: instrumentation, uncertainty analysis, and recommendations for future high-accuracy greenhouse gas monitoring efforts, Atmos. Meas. Tech., 7, 647–687, https://doi.org/10.5194/amt-7-647-2014, 2014.
Angevine, W. M., Eddington, L., Durkee, K., Fairall, C., Bianco, L., and Brioude, J.: Meteorological model evaluation for CalNex 2010, Mon. Weather Rev., 140, 3885–3906, https://doi.org/10.1175/MWR-D-12-00042.1, 2012.
Download
Short summary
We present the first carbon dioxide (CO2) and methane (CH4) measurements from an extensive surface network as part of the Los Angeles Megacity Carbon Project. We describe methods that are essential for understanding carbon fluxes from complex urban environments. CO2 and CH4 levels are spatially and temporally variable, with urban sites showing significant enhancements relative to background. In 2015, the median afternoon enhancement near downtown Los Angeles was ~15 ppm CO2 and ~80 ppb CH4.
Altmetrics
Final-revised paper
Preprint