World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Combining Bayesian Methods and Aircraft Observations to Constrain the Ho. + No2 Reaction Rate : Volume 11, Issue 8 (29/08/2011)

By Henderson, B. H.

Click here to view

Book Id: WPLBN0003995577
Format Type: PDF Article :
File Size: Pages 41
Reproduction Date: 2015

Title: Combining Bayesian Methods and Aircraft Observations to Constrain the Ho. + No2 Reaction Rate : Volume 11, Issue 8 (29/08/2011)  
Author: Henderson, B. H.
Volume: Vol. 11, Issue 8
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

T. Py, H. O., Cohen, R. C., Crooks, J., Pinder, R. W., Vizuete, W., Carlton, A. G., & Henderson, B. H. (2011). Combining Bayesian Methods and Aircraft Observations to Constrain the Ho. + No2 Reaction Rate : Volume 11, Issue 8 (29/08/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Environmental Science and Engineering, University of North Carolina, Chapel Hill, NC, USA. Tropospheric ozone is the third strongest greenhouse gas, and has the highest uncertainty in radiative forcing of the top five greenhouse gases. Throughout the troposphere, ozone is produced by radical oxidation of nitrogen oxides (NOx = NO + NO2). In the upper troposphere (8–10 km), current chemical transport models under-estimate nitrogen dioxide (NO2) observations. Improvements to simulated NOx emissions from lightning have increased NO2 predictions, but the predictions in the upper troposphere remain biased low. The upper troposphere has low temperatures (T < 250 K) that increase the uncertainty of many important chemical reaction rates. This study constrains uncertain reaction rates by combining model predictions with measurements from the Intercontinental Chemical Transport Experiment-North America observational campaign. The results show that the nitric acid formation rate, which is the dominant sink of NO2 and radicals, is currently over-estimated by 22 % in the upper troposphere. The results from this study suggest that the temperature sensitivity of nitric acid formation is lower than currently recommended. Since the formation of nitric acid removes nitrogen dioxide and radicals that drive the production of ozone, the revised reaction rate will affect ozone concentrations in upper troposphere impacting climate and air quality in the lower troposphere.

Summary
Combining Bayesian methods and aircraft observations to constrain the HO. + NO2 reaction rate

Excerpt
Allen, D. J., Pickering, K. E., Pinder, R. W., Henderson, B. H., Appel, K. W., and Prados, A.: Impact of lightning-NO on Eastern United States photochemistry during the summer of 2006 as determined using the CMAQ model, Atmos. Chem. Phys. Discuss., 11, 17699–17757, doi:10.5194/acpd-11-17699-2011, 2011.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., and Troe, J.: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I – gas phase reactions of Ox, HOx, NOx and SOx species, Atmos. Chem. Phys., 4, 1461–1738, doi:10.5194/acp-4-1461-2004, 2004.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., Troe, J., and IUPAC Subcommittee: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume II -� gas phase reactions of organic species, Atmos. Chem. Phys., 6, 3625–4055, doi:10.5194/acp-6-3625-2006, 2006.; Bergin, M. and Milford, J.: Application of Bayesian Monte Carlo analysis to a Lagrangian photochemical air quality model, Atmos. Environ., 34, 781–792, 2000.; Bertram, T. H., Perring, A. E., Wooldridge, P. J., Crounse, J. D., Kwan, A. J., Wennberg, P. O., Scheuer, E., Dibb, J., Avery, M. A., Sachse, G. W., Vay, S. A., Crawford, J. H., McNaughton, C. S., Clarke, A., Pickering, K. E., Fuelberg, H., Huey, G., Blake, D. R., Singh, H. B., Hall, S. R., Shetter, R. E., Fried, A., Heikes, B. G., and Cohen, R. C.: Direct Measurements of the Convective Recycling of the Upper Troposphere, Science, 315, 816–820, doi:10.1126/science.1134548, 2007.; Browne, E. C., Perring, A. E., Wooldridge, P. J., Apel, E., Hall, S. R., Huey, L. G., Mao, J., Spencer, K. M., Clair, J. M. St., Weinheimer, A. J., Wisthaler, A., and Cohen, R. C.: Global and regional effects of the photochemistry of CH3O2NO2: evidence from ARCTAS, Atmos. Chem. Phys., 11, 4209–4219, doi:10.5194/acp-11-4209-2011, 2011.; Chen, S. and Brune, W.: Sensitivity Analysis of the RACM Chemical Mechanism Based on TRAMP-2006 Field Data, UC Davis Atmospheric Chemical Mechanisms, 2010.; Dilks, D., Canale, R., and Meier, P.: Development of Bayesian Monte Carlo techniques for water quality model uncertainty, Ecol. Modell., 62, 149–162, 1992.; Donahue, N.: Atmospheric chemistry: The reaction that wouldn't quit, Nat. Chem., 3, 98–99, 2011.; Fountoukis, C. and Nenes, A.: ISORROPIA II: a computationally efficient thermodynamic equilibrium model for K+�Ca2+�Mg2+�NH4+�Na+�SO$_4^2$-�NO3-�Cl-�H2O aerosols, Atmos. Chem. Phys., 7, 4639–4659, doi:10.5194/acp-7-4639-2007, 2007.; Frigyik, B. A., Kapila, A., and Gupta, M. R.: Introduction to the Dirichlet Distribution and Related Processes, Tech. Rep. UWEETR-2010-0006, Department of Electrical Engineering, University of Washington, 2010.; Fuelberg, H. E., Porter, M. J., Kiley, C. M., Halland, J. J., and Morse, D.: Meteorological conditions and anomalies during the Intercontinental Chemical Transport Experiment – North America, J. Geo

 

Click To View

Additional Books


  • Atmospheric Chemistry of Nitrogenous Aer... (by )
  • Corrigendum to Spectro-microscopic Measu... (by )
  • Observing Three Dimensional Water Vapour... (by )
  • Ccn Activation Experiments with Adipic A... (by )
  • Lightning Activity in Brazilian Thunders... (by )
  • Comparison of Co2 Fluxes Estimated Using... (by )
  • Improving Cloud Information Over Deserts... (by )
  • Revisiting Twomey's Approximation for Pe... (by )
  • Enhanced Tropospheric Bro Over Antarctic... (by )
  • The Carbon Emissions of Chinese Cities :... (by )
  • Co-located Column and in Situ Measuremen... (by )
  • Ultraviolet and Visible Complex Refracti... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.