Search Results - "LaFranchi, B. W"

Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009 by Beaver, M. R, Clair, J. M. St, Paulot, F, Spencer, K. M, Crounse, J. D, LaFranchi, B. W, Min, K. E, Pusede, S. E, Wooldridge, P. J, Schade, G. W, Park, C, Cohen, R. C, Wennberg, P. O

“…Alkyl and multifunctional organic nitrates, molecules of the chemical form RONO2, are products of chain terminating reactions in the tropospheric HOx and NOx…”
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Assessing fossil fuel CO2 emissions in California using atmospheric observations and models by Graven, H, Fischer, M L, Lueker, T, Jeong, S, Guilderson, T P, Keeling, R F, Bambha, R, Brophy, K, Callahan, W, Cui, X, Frankenberg, C, Gurney, K R, LaFranchi, B W, Lehman, S J, Michelsen, H, Miller, J B, Newman, S, Paplawsky, W, Parazoo, N C, Sloop, C, Walker, S J

“…Analysis systems incorporating atmospheric observations could provide a powerful tool for validating fossil fuel CO2 (ffCO2) emissions reported for individual…”
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Eddy covariance fluxes and vertical concentration gradient measurements of NO and NO2 over a ponderosa pine ecosystem: observational evidence for within-canopy chemical removal of NOx by Min, K.-E, Pusede, S E, Browne, E C, LaFranchi, B W, Cohen, R C

“…Exchange of NOx (NO+NO2 ) between the atmosphere and biosphere is important for air quality, climate change, and ecosystem nutrient dynamics. There are few…”
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Observations of the temperature dependent response of ozone to NOx reductions in the Sacramento, CA urban plume by LaFranchi, B W, Goldstein, A H, Cohen, R C

“…Observations of NOx in the Sacramento, CA region show that mixing ratios decreased by 30 % between 2001 and 2008. Here we use an observation-based method to…”
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Closing the peroxy acetyl nitrate budget: observations of acyl peroxy nitrates (PAN, PPN, and MPAN) during BEARPEX 2007 by LaFranchi, B. W., Wolfe, G. M., Thornton, J. A., Harrold, S. A., Browne, E. C., Min, K. E., Wooldridge, P. J., Gilman, J. B., Kuster, W. C., Goldan, P. D., de Gouw, J. A., McKay, M., Goldstein, A. H., Ren, X., Mao, J., Cohen, R. C.

“…Acyl peroxy nitrates (APNs, also known as PANs) are formed from the oxidation of aldehydes and other oxygenated VOC (oVOC) in the presence of NO2. There are…”
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The Chemistry of Atmosphere-Forest Exchange (CAFE) Model – Part 2: Application to BEARPEX-2007 observations by Wolfe, G. M., Thornton, J. A., Bouvier-Brown, N. C., Goldstein, A. H., Park, J.-H., McKay, M., Matross, D. M., Mao, J., Brune, W. H., LaFranchi, B. W., Browne, E. C., Min, K.-E., Wooldridge, P. J., Cohen, R. C., Crounse, J. D., Faloona, I. C., Gilman, J. B., Kuster, W. C., de Gouw, J. A., Huisman, A., Keutsch, F. N.

“…In a companion paper, we introduced the Chemistry of Atmosphere-Forest Exchange (CAFE) model, a vertically-resolved 1-D chemical transport model designed to…”
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Observations of atmosphere-biosphere exchange of total and speciated peroxynitrates: nitrogen fluxes and biogenic sources of peroxynitrates by Min, K.-E, Pusede, S. E, Browne, E. C, LaFranchi, B. W, Wooldridge, P. J, Wolfe, G. M, Harrold, S. A, Thornton, J. A, Cohen, R. C

“…Peroxynitrates are responsible for global scale transport of reactive nitrogen. Recent laboratory observations suggest that they may also play an important…”
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Measurement of atmospheric nitrous acid at Bodgett Forest during BEARPEX2007 by Ren, X., Gao, H., Zhou, X., Crounse, J. D., Wennberg, P. O., Browne, E. C., LaFranchi, B. W., Cohen, R. C., McKay, M., Goldstein, A. H., Mao, J.

“…Nitrous acid (HONO) is an important precursor of the hydroxyl radical (OH) in the lower troposphere. Understanding HONO chemistry, particularly its sources and…”
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Observations of elevated formaldehyde over a forest canopy suggest missing sources from rapid oxidation of arboreal hydrocarbons by Choi, W., Faloona, I. C., Bouvier-Brown, N. C., McKay, M., Goldstein, A. H., Mao, J., Brune, W. H., LaFranchi, B. W., Cohen, R. C., Wolfe, G. M., Thornton, J. A., Sonnenfroh, D. M., Millet, D. B.

“…To better understand the processing of biogenic VOCs (BVOCs) in the pine forests of the US Sierra Nevada, we measured HCHO at Blodgett Research Station using…”
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Total Peroxy Nitrates (ΣPNs) in the atmosphere: the Thermal Dissociation-Laser Induced Fluorescence (TD-LIF) technique and comparisons to speciated PAN measurements by Wooldridge, P. J., Perring, A. E., Bertram, T. H., Flocke, F. M., Roberts, J. M., Singh, H. B., Huey, L. G., Thornton, J. A., Wolfe, G. M., Murphy, J. G., Fry, J. L., Rollins, A. W., LaFranchi, B. W., Cohen, R. C.

“…Peroxyacetyl nitrate (PAN) and its chemical analogues are increasingly being quantified in the ambient atmosphere by thermal dissociation (TD) followed by…”
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Photochemical modeling of glyoxal at a rural site: observations and analysis from BEARPEX 2007 by Huisman, A. J., Hottle, J. R., Galloway, M. M., DiGangi, J. P., Coens, K. L., Choi, W., Faloona, I. C., Gilman, J. B., Kuster, W. C., de Gouw, J., Bouvier-Brown, N. C., Goldstein, A. H., LaFranchi, B. W., Cohen, R. C., Wolfe, G. M., Thornton, J. A., Docherty, K. S., Farmer, D. K., Cubison, M. J., Jimenez, J. L., Mao, J., Brune, W. H., Keutsch, F. N.

“…We present roughly one month of high time-resolution, direct, in situ measurements of gas-phase glyoxal acquired during the BEARPEX 2007 field campaign. The…”
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Corrigendum to "Measurement of atmospheric nitrous acid at Blodgett Forest during BEARPEX2007" published in Atmos. Chem. Phys., 10, 6283-6294, 2010 by Ren, X., Gao, H., Zhou, X., Crounse, J. D., Wennberg, P. O., Browne, E. C., LaFranchi, B. W., Cohen, R. C., McKay, M., Goldstein, A. H., Mao, J.

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Constraints on emissions of carbon monoxide, methane, and a suite of hydrocarbons in the Colorado Front Range using observations of 14CO2 by B. W. LaFranchi, G. Pétron, J. B. Miller, S. J. Lehman, A. E. Andrews, E. J. Dlugokencky, B. Hall, B. R. Miller, S. A. Montzka, W. Neff, P. C. Novelli, C. Sweeney, J. C. Turnbull, D. E. Wolfe, P. P. Tans, K. R. Gurney, T. P. Guilderson

“…Atmospheric radiocarbon (14C) represents an important observational constraint on emissions of fossil-fuel derived carbon into the atmosphere due to the…”
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Strong regional atmospheric 14C signature of respired CO2 observed from a tall tower over the midwestern United States by LaFranchi, B. W., McFarlane, K. J., Miller, J. B., Lehman, S. J., Phillips, C. L., Andrews, A. E., Tans, P. P., Chen, H., Liu, Z., Turnbull, J. C., Xu, X., Guilderson, T. P.

“…Radiocarbon in CO2 (14CO2) measurements can aid in discriminating between fast (<1 year) and slower (>5–10 years) cycling of C between the atmosphere and the…”
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Observations of the temperature dependent response of ozone to NO x reductions in the Sacramento, CA urban plume by LaFranchi, B. W., Goldstein, A. H., Cohen, R. C.

“…Observations of NOx in the Sacramento, CA region show that mixing ratios decreased by 30 % between 2001 and 2008. Here we use an observation-based method to…”
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Eddy covariance fluxes and vertical concentration gradient measurements of NO and NO.sub.2 over a ponderosa pine ecosystem: observational evidence for within-canopy chemical removal of NO.sub.x by Min, K.-E, Pusede, S. E, Browne, E. C, LaFranchi, B. W, Cohen, R. C

“…Exchange of NO.sub.x (NO+NO.sub.2) between the atmosphere and biosphere is important for air quality, climate change, and ecosystem nutrient dynamics. There…”
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Eddy covariance fluxes and vertical concentration gradient measurements of NO and NO 2 over a ponderosa pine ecosystem: observational evidence for within-canopy chemical removal of NO x by Min, K.-E., Pusede, S. E., Browne, E. C., LaFranchi, B. W., Cohen, R. C.

“…Exchange of NOx (NO+NO2) between the atmosphere and biosphere is important for air quality, climate change, and ecosystem nutrient dynamics. There are few…”
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Observations of the temperature dependent response of ozone to NO sub(x) reductions in the Sacramento, CA urban plume by LaFranchi, B W, Goldstein, AH, Cohen, R C

“…Observations of NO sub(x) in the Sacramento, CA region show that mixing ratios decreased by 30 % between 2001 and 2008. Here we use an observation-based method…”
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Assessing fossil fuel CO 2 emissions in California using atmospheric observations and models by Graven, H, Fischer, M L, Lueker, T, Jeong, S, Guilderson, T P, Keeling, R F, Bambha, R, Brophy, K, Callahan, W, Cui, X, Frankenberg, C, Gurney, K R, LaFranchi, B W, Lehman, S J, Michelsen, H, Miller, J B, Newman, S, Paplawsky, W, Parazoo, N C, Sloop, C, Walker, S J

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Constraints on emissions of carbon monoxide, methane, and a suite of hydrocarbons in the Colorado Front Range using observations of .sup.14CO.sub.2 by LaFranchi, B. W, Pétron, G, Miller, J. B, Lehman, S. J, Andrews, A. E, Dlugokencky, E. J, Hall, B, Miller, B. R, Montzka, S. A, Neff, W, Novelli, P. C, Sweeney, C, Turnbull, J. C, Wolfe, D. E, Tans, P. P, Gurney, K. R, Guilderson, T. P

“…Atmospheric radiocarbon (.sup.14 C) represents an important observational constraint on emissions of fossil-fuel derived carbon into the atmosphere due to the…”
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