Research Publications

Publications by James Walega

Profile >     Email >

Tzompa-Sosa, Z. A., Mahieu, E., Franco, B., Keller, C. A., Turner, A. J., Detlev HelmigAlan FriedDirk RichterPetter WeibringJames Walega, Yacovitch, T. I., Herndon, S. C., Blake, D. R., Hase, F., Hannigan, J. W., Conway, S., Strong, K., Schneider, M., Fischer, E. V. 2017: Revisiting global fossil fuel and biofuel emissions of ethane. Journal of Geophysical Research—Atmospheres, 122(4): 2493-2512. DOI: 10.1002/2016JD025767

Dingle, J. H., Vu, K., Bahreini, R., Apel, E. C., Campos, T. L., Flocke, F., Alan Fried, Herndon, S., Hills, A. J., Hornbrook, R. S., Huey, G., Kaser, L., Montzka, D. D., Nowak, J. B., Reeves, M., Dirk Richter, Roscioli, J. R., Shertz, S., Stell, M., Tanner, D., Tyndall, G., James WalegaPetter Weibring, Weinheimer, A. 2016: Aerosol optical extinction during the Front Range Air Pollution and Photochemistry Experiment (FRAPP) 2014 summertime field campaign, Colorado, USA. Atmospheric Chemistry and Physics, 16: 11207-11217. DOI: 10.5194/acp-16-11207-2016

Zhu, L., Jacob, D. J., Kim, P. S., Fisher, J. A., Yu, K., Travis, K. R., Mickley, L. J., Yantosca, R. M., Sulprizio, M. P., De Smedt, I., Abad, G. G., Chance, K., Li, C., Ferrare, R., Alan Fried, Hair, J. W., Hanisco, T. F., Dirk Richter, Scarino, A. J., James WalegaPetter Weibring, Wolfe, G. M. 2016: Observing atmospheric formaldehyde (HCHO) from space: Validation and intercomparison of six retrievals from four satellites (OMI, GOME2A, GOME2B, OMPS) with SEAC(4)RS aircraft observations over the southeast US. Atmospheric Chemistry and Physics, 16(21): 13477-13490. DOI: 10.5194/acp-16-13477-2016

Alan Fried, Barth, M. C., Bela, M., Petter WeibringDirk RichterJames Walega, Li, Y., Pickering, K., Apel, E., Hornbrook, R., Hills, A., Riemer, D. D., Blake, N., Blake, D. R., Schroeder, J. R., Luo, Z. J., Crawford, J. H., Olson, J., Rutledge, S., Betten, D., Biggerstaff, M. I., Diskin, G. S., Sachse, G., Campos, T., Flocke, F., Weinheimer, A., Cantrell, C., Pollack, I., Peischl, J., Froyd, K., Wisthaler, A., Mikoviny, T., Woods, S. 2016: Convective transport of formaldehyde to the upper troposphere and lower stratosphere and associated scavenging in thunderstorms over the central United States during the 2012 DC3 study. Journal of Geophysical Research—Atmospheres, 121(12): 7430-7460. DOI: 10.1002/2015JD024477

Pusede, S. E., Duffey, K. C., Shusterman, A. A., Saleh, A., Laughner, J. L., Wooldridge, P. J., Zhang, Q., Parworth, C. L., Kim, H., Capps, S. L., Valin, L. C., Cappa, C. D., Alan FriedJames Walega, Nowak, J. B., Weinheimer, A. J., Hoff, R. M., Berkoff, T. A., Beyersdorf, A. J., Olson, J., Crawford, J. H., Cohen, R. C. 2016: On the effectiveness of nitrogen oxide reductions as a control over ammonium nitrate aerosol. Atmospheric Chemistry and Physics, 16(4): 2575-2596. DOI: 10.5194/acp-16-2575-2016

Müller, M., Anderson, B. E., Beyersdorf, A. J., Crawford, J. H., Diskin, G. S., Eichler, P., Alan Fried, Keutsch, F. N., Mikoviny, T., Thornhill, K. L., James Walega, Weinheimer, A. J., Yang, M., Yokelson, R. J., Wisthaler, A. 2016: In situ measurements and modeling of reactive trace gases in a small biomass burning plume. Atmospheric Chemistry and Physics, 16(6): 3813-3824. DOI: 10.5194/acp-16-3813-2016

Parrish, D. D., Ryerson, T. B., Mellqvist, J., Johansson, J., Alan FriedDirk RichterJames Walega, Washenfelder, R. A., de Gouw, J. A., Peischl, J., Aikin, K. C., McKeen, S. A., Frost, G. J., Fehsenfeld, F. C., Herndon, S. C. 2012: Primary and secondary sources of formaldehyde in urban atmospheres: Houston Texas region. Atmospheric Chemistry and Physics, 12(7): 3273-3288. DOI: 10.5194/acp-12-3273-2012

Liao, J., Huey, L. G., Tanner, D. J., Flocke, F. M., Orlando, J. J., Neuman, J. A., Nowak, J. B., Weinheimer, A. J., Hall, S. R., Smith, J. N., Alan Fried, Staebler, R. M., Wang, Y., Koo, J.-H., Cantrell, C. A., Petter WeibringJames Walega, Knapp, D. J., Shepson, P. B., Stephens, C. R. 2012: Observations of inorganic bromine (HOBr, BrO, and Br-2) speciation at Barrow, Alaska, in spring 2009. Journal of Geophysical Research—Atmospheres, 117: D00R16. DOI: 10.1029/2011JD016641

Olson, J. R., Crawford, J. H., Brune, W., Mao, J., Ren, X. A., Alan Fried, B. Anderson, B., Apel, E., Beaver, M., Blake, D., Chen, G., Crounse, J., Dibb, J., Diskin, G., Hall, S. R., Huey, L. G., Knapp, D., Dirk Richter, Riemer, D., St. Clair, J., Ullmann, K., James WalegaPetter Weibring, Weinheimer, A., Wennberg, P., Wisthaler, A. 2012: An analysis of fast photochemistry over high northern latitudes during spring and summer using in-situ observations from ARCTAS and TOPSE. Atmospheric Chemistry and Physics, 12: 6799-6825. DOI: 10.5194/acp-12-6799-2012

Alan Fried, Cantrell, C., Olson, J., Crawford, J. H., Petter WeibringJames WalegaDirk Richter, Junkermann, W., Volkamer, R., Sinreich, R., Heikes, B. G., O'Sullivan, D., Blake, D. R., Blake, N., Meinardi, S., Apel, E., Weinheimer, A., Knapp, D., Perring, A., Cohen, R. C., Fuelberg, H., Shetter, R. E., Hall, S. R., Ullmann, K., Brune, W. H., Mao, J., Ren, X., Huey, L. G., Singh, H. B., Hair, J. W., Riemer, D., Diskin, G., Sachse, G. 2011: Detailed comparisons of airborne formaldehyde measurements with box models during the 2006 INTEX-B and MILAGRO campaigns: Potential evidence for significant impacts of unmeasured and multi-generation volatile organic carbon compounds. Atmospheric Chemistry and Physics, 11(22): 11867-11894. DOI: 10.5194/acp-11-11867-2011

Kim, S.-W., McKeen, S. A., Frost, G. J., Lee, S.-H., Trainer, M., Richter, A., Angevine, W. M., Atlas, E., Bianco, L., Boersma, K. F., Brioude, J., Burrows, J. P., de Gouw, J., Alan Fried, Gleason, J., Hilboll, A., Mellqvist, J., Peischl, J., Dirk Richter, Rivera, C., Ryerson, T., Hekkert, S. T. L., James Walega, Warneke, C., Petter Weibring, Williams, E. 2011: Evaluations of NOx and highly reactive VOC emission inventories in Texas and their implications for ozone plume simulations during the Texas Air Quality Study 2006. Atmospheric Chemistry and Physics, 11(22): 11361-11386. DOI: 10.5194/acp-11-11361-2011

Hornbrook, R. S., Blake, D. R., Diskin, G. S., Alan Fried, Fuelberg, H. E., Meinardi, S., Mikoviny, T., Dirk Richter, Sachse, G. W., Vay, S. A., James WalegaPetter Weibring, Weinheimer, A. J., Wiedinmyer, C., Wisthaler, A., Hills, A., Riemer, D. D., Apel, E. C. 2011: Observations of nonmethane organic compounds during ARCTAS - Part 1: Biomass burning emissions and plume enhancements. Atmospheric Chemistry and Physics, 11(21): 11103-11130. DOI: 10.5194/acp-11-11103-2011

Villena, G., Wiesen, P., Cantrell, C. A., Flocke, F., Alan Fried, Hall, S. R., Hornbrook, R. S., Knapp, D., Kosciuch, E., Mauldin, R. L., III, McGrath, J. A., Montzka, D., Dirk Richter, Ullmann, K., James WalegaPetter Weibring, Weinheimer, A., Staebler, R. M., Liao, J., Huey, L. G., Kleffmann, J. 2011: Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of OH radicals?. Journal of Geophysical Research—Atmospheres, 116: D00R07. DOI: 10.1029/2011JD016643

Boeke, N. L., Marshall, J. D., Alvarez, S., Chance, K. V., Alan Fried, Kurosu, T. P., Rappengluck, B., Dirk RichterJames WalegaPetter Weibring, Millet, D. B. 2011: Formaldehyde columns from the Ozone Monitoring Instrument: Urban versus background levels and evaluation using aircraft data and a global model. Journal of Geophysical Research-Atmospheres, 116: D05303. DOI: 10.1029/2010JD014870

Mao, J., Jacob, D. J., Evans, M. J., Olson, J. R., Ren, X., Brune, W. H., St Clair, J. M., Crounse, J. D., Spencer, K. M., Beaver, M. R., Wennberg, P. O., Cubison, M. J., Jimenez, J. L., Alan FriedPetter WeibringJames Walega, Hall, S. R., Weinheimer, A. J., Cohen, R. C., Chen, G., Crawford, J. H., McNaughton, C., Clarke, A. D., Jaegle, L., Fisher, J. A., Yantosca, R. M., Le Sager, P., Carouge, C. 2010: Chemistry of hydrogen oxide radicals (HOx) in the Arctic troposphere in spring. Atmospheric Chemistry and Physics, 10(13): 5823-5838. DOI: 10.5194/acp-10-5823-2010

Apel, E. C., Emmons, L. K., Karl, T., Flocke, F., Hills, A. J., Madronich, S., Lee-Taylor, J., Alan FriedPetter WeibringJames WalegaDirk Richter, Tie, X., Mauldin, L., Campos, T., Weinheimer, A., Knapp, D., Sive, B., Kleinman, L., Springston, S., Zaveri, R., Ortega, J., Voss, P., Blake, D., Baker, A., Warneke, C., Welsh-Bon, D., de Gouw, J., Zheng, J., Zhang, R., Rudolph, J., Junkermann, W., Riemer, D. D. 2010: Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area. Atmospheric Chemistry and Physics, 10(5): 2353-2375.

Washenfelder, R. A., Trainer, M., Frost, G. J., Ryerson, T. B., Atlas, E. L., de Gouw, J. A., Flocke, F. M., Alan Fried, Holloway, J. S., Parrish, D. D., Peischl, J., Dirk Richter, Schauffler, S. M., James Walega, Warneke, C., Petter Weibring, Zheng, W. 2010: Characterization of NOx, SO2, ethene, and propene from industrial emission sources in Houston, Texas. Journal of Geophysical Research—Atmospheres, 115: D16311. DOI: 10.1029/2009JD013645

Emmons, L. K., Apel, E. C., Lamarque, J.-F., Hess, P. G., Avery, M., Blake, D., Brune, W., Campos, T., Crawford, J., DeCarlo, P. F., Hall, S., Heikes, B., Holloway, J., Jimenez, J. L., Knapp, D. J., Kok, G., Mena-Carrasco, M., Olson, J., O'Sullivan, D., Sachse, G., James WalegaPetter Weibring, Weinheimer, A., Wiedinmyer, C. 2010: Impact of Mexico City emissions on regional air quality from MOZART-4 simulations. Atmospheric Chemistry and Physics, 10(13): 6195-6212. DOI: 10.5194/acp-10-6195-2010

Yokelson, R. J., Crounse, J. D., DeCarlo, P. F., Karl, T., Urbanski, S., Atlas, E., Campos, T., Shinozuka, Y., Kapustin, V., Clarke, A. D., Weinheimer, A., Knapp, D. J., Montzka, D. D., Holloway, J., Petter Weibring, Flocke, F., Zheng, W., Toohey, D., Wennberg, P. O., Wiedinmyer, C., Mauldin, L., Alan FriedDirk RichterJames Walega, Jimenez, J. L., Adachi, K., Buseck, P. R., Hall, S. R., Shetter, R. 2009: Emissions from biomass burning in the Yucatan. Atmospheric Chemistry and Physics, 9(15): 5785-5812.

De Gouw, J. A., Hekkert, S. T. L., Mellqvist, J., Warneke, C., Atlas, E. L., Fehsenfeld, F. C., Alan Fried, Frost, G. J., Harren, F. J. M., Holloway, J. S., Lefer, B., Lueb, R., Meagher, J. F., Parrish, D. D., Patel, M., Pope, L., Dirk Richter, Rivera, C., Ryerson, T. B., Samuelsson, J., James Walega, Washenfelder, R. A., Petter Weibring, Zhu, X. 2009: Airborne measurements of ethene from industrial sources using laser photo-acoustic spectroscopy. Environmental Science & Technology, 43(7): 2437-2442. DOI: 10.1021/es802701a

Bahreini, R., Ervens, B., Middlebrook, A. M., Warneke, C., de Gouw, J. A., DeCarlo, P. F., Jimenez, J. L., Brock, C. A., Neuman, J. A., Ryerson, T. B., Stark, H., Atlas, E., Brioude, J., Alan Fried, Holloway, J. S., Peischl, J., Dirk RichterJames WalegaPetter Weibring, Wollny, A. G., Fehsenfeld, F. C. 2009: Organic aerosol formation in urban and industrial plumes near Houston and Dallas, Texas. Journal of Geophysical Research—Atmospheres, 114: D00F16. DOI: 10.1029/2008JD011493

Alan Fried, Olson, J. R., James Walega, Crawford, J. H., Chen, G., Petter WeibringDirk Richter, Roller, C., Tittel, F. K., Porter, M., Fuelberg, H., Halland, J., Bertram, T. H., Cohen, R. C., Pickering, K., Heikes, B. G., Snow, J. A., Shen, H., O'Sullivan, D. W., Brune, W. H., Ren, X., Blake, D. R., Blake, N., Sachse, G., Diskin, G. S., Podolske, J., Vay, S. A., Shetter, R. E., Hall, S. R., Anderson, B. E., Thornhill, L., Clarke, A. D., McNaughton, C. S., Singh, H. B., Avery, M. A., Huey, G., Kim, S., Millet, D. B. 2008: Role of convection in redistributing formaldehyde to the upper troposphere over North America and the North Atlantic during the summer 2004 INTEX Campaign. Journal of Geophysical Research—Atmospheres 113: D17306. DOI: 10.1029/2007JD009760

Alan FriedJames Walega, Olson, J. R., Crawford, J. H., Chen, G., Petter WeibringDirk Richter, Roller, C., Tittel, F., Heikes, B., Snow, J., Shen, H., O'Sullivan, D., Porter, M., Fuelberg, H., Halland, J., Millet, D. 2008: Formaldehyde over North America and the North Atlantic during the summer 2004 INTEX Campaign: Methods, observed distributions, and measurement-model comparisons. Journal of Geophysical Research—Atmospheres, 113: D10302. DOI: 10.1029/2007JD009185

Snow, J. A., Heikes, B. G., Shen, H., O’Sullivan, D., Alan FriedJames Walega 2007: Hydrogen peroxide, methyl hydroperoxide, and formaldehyde over North America and the North Atlantic. Journal of Geophysical Research—Atmospheres, 112: D12S07. DOI: 10.1029/2006JD007746

Millet, D. B., Jacob, D. J., Turquety, S., Hudman, R. C., Wu, S., Alan FriedJames Walega, Heikes, B. G., Blake, D. R., Singh, H. B., Anderson, B., Clarke, A. D. 2006: Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde columns and isoprene emission. Journal of Geophysical Research—Atmospheres, 111(D4). DOI: 10.1029/2005JD006853

Singh, H. B., Salas, L. J., Chatfield, R. B., Czech, E., Alan FriedJames Walega, Evans, M., Fields, B., Jacob, D. J., Blake, D., Heikes, B., Talbot, R., Sachse, G., Crawford, J., Avery, M., Sandholm, S., Fuelberg, H. 2004: Analysis of the atmospheric distribution, sources, and sinks of oxygenated organic chemicals based on measurements over the Pacific during TRACE-P. Journal of Geophysical Research—Atmospheres, 109: D15S07. DOI: 10.1029/2003JD003883

Eisele, F. L., Mauldin, L., Cantrell, C., Zondlo, M., Apel, E., Alan FriedJames Walega, Shetter, R., Lefer, B., Flocke, F., Weinheimer, A., Avery, M., Vay, S., Sachse, G., Singh, H. B., Brune, W., Harder, H., Martinez, M., Bandy, A., Thornton, D., Heikes, B., Kondo, Y., Riemer, D., Sandholm, S., Tan, D., Talbot, R., Dibb, J. 2003: Summary of measurement intercomparisons during TRACE-P. Journal of Geophysical Research—Atmospheres, 108(D20): 8791. DOI: 10.1029/2002JD003167

Alan Fried, Crawford, J., Olson, J., James Walega, Potter, W., Wert, B. P., Jordon, C., Anderson, B., Shetter, R., Lefer, B., Blake, D., Blake, N., Meinardi, S., Heikes, B., O'Sullivan, D., Snow, J., Fuelberg, H., Kiley, C. M., Sandholm, S., Tan, D., Sachse, G., Singh, H., Faloona, I., Harward, C. N., Carmichael, G. R. 2003: Airborne tunable diode laser measurements of formaldehyde during TRACE-P: Distributions and box-model comparisons. Journal of Geophysical Research—Atmospheres, 108(D20): 8798. DOI: 1029/2003JD003451

Wert, B. P., Alan Fried, Rauenbuehler, S., James Walega, Henry, B. 2003: Design and performance of a tunable diode laser absorption spectrometer for airborne formaldehyde measurements. Journal of Geophysical Research—Atmospheres, 108(D12): 4350. DOI: 10.1029/2002JD002872

Wang, Y., Ridley, B. A., Alan Fried, Cantrell, C., Davis, D., Chen, G., Snow, J., Heikes, B., Talbot, R., Dibb, J., Flocke, F., Weinheimer, A., Blake, N., Blake, D., Shetter, R., Lefer, B., Atlas, E. L., Coffey, M., James Walega, Wert, B. P. 2003: Springtime photochemistry at northern mid and high latitudes. Journal of Geophysical Research—Atmospheres, 108(D4). DOI: 10.1029/2002JD002227

Cantrell, C. A., Mauldin, L., Zondlo, M., Eisele, F., Kosciuch, E., Shetter, R., Lefer, B., Hall, S. R., Campos, T., Ridley, B. A., James WalegaAlan Fried, Wert, B. P., Flocke, F., Weinheimer, A., Hannigan, J., Coffey, M., Atlas, E. L., Stephens, S., Heikes, B., Snow, J., Blake, D., Blake, N., Katzenstein, A., Lopez, J., Browell, E. V., Cohen, R. C., Thorton, J. A., Rosen, R., Wooldridge, P. J., Day, D., Dibb, J., Scheuer, E., Seid, G., Talbot, R. 2003: Steady state free radical budgets and ozone photochemistry during TOPSE. Journal of Geophysical Research—Atmospheres, 108(D4): 8361. DOI: 10.1029/2002JD002198

Alan FriedJames Walega, Wang, Y., Cantrell, C., Wert, B. P., Ridley, B. A., Atlas, E. L., Shetter, R., Lefer, B., Coffey, M. T., Hannigan, J., Blake, D., Blake, N., Meinardi, S., Talbot, R., Dibb, J., Scheuer, E., Wingenter, O., Snow, J., Heikes, B., Ehhalt, D. 2003: Tunable diode laser measurements of formaldehyde during the TOPSE 2000 study: Distributions, trends, and model comparisons. Journal of Geophysical Research—Atmospheres, 108(D4): 8365. DOI: 10.1029/2002JD002208

Alan FriedJames Walega, Ridley, B. A., Atlas, E. L., Montzka, D., Browell, E. V., Cantrell, C., Blake, D., Blake, N., Coffey, M., Cohen, R. C., DeYoung, R. J., Dibb, J., Eisele, F., Flocke, F., Grahek, F., Grant, W. B., Hair, J. W., Hannigan, J., Heikes, B., Lefer, B., Mauldin, L., Shetter, R., Snow, J., Talbot, R., Thornton, J. A., Weinheimmer, A. 2003: Ozone depletion events observed in the high latitude surface layer during the TOPSE Aircraft Program. Journal of Geophysical Research—Atmospheres, 108(D4): 8356. DOI: 10.1029/2001JD001507

Dirk RichterAlan Fried, Wert, B. P., James Walega, Tittel, F. K. 2002: Development of tunable mid-IR difference-frequency laser sources for highly sensitive airborne trace gas detection. Applied Physics B, 75: 281-288.

Popp, P. J., Ridley, B. A., Neuman, J. A., Avallone, L. M., Toohey, D. W., Zittel, P. F., Schmid, O., Herman, R. L., Gao, R. S., Northway, M. J., Holecek, J. C., Fahey, D. W., Thompson, T. L., Kelly, K. K., James Walega, Grahek, F. E., Wilson, J. C., Ross, M. N., Danilin, M. Y. 2002: The emission and chemistry of reactive nitrogen species in the plume of an Athena II solid-fuel rocket motor. Geophysical Research Letters, 29(18): article 1887. DOI: 10.1029/2002GL015197

Neuman, J. A., Gao, R. S., Fahey, D. W., Holecek, J. C., Ridley, B. A., James Walega, Grahek, F. E., Richard, E. C., McElroy, C. T., Thompson, T. L., Elkins, J. W., Moore, F. L., Ray, E. A. 2001: In situ measurements of HNO3, NOy, NO, and O3 in the lower stratosphere and upper troposphere. Atmospheric Environment, 35(33): 5789-5797. DOI: 10.1016/S1352-2310(01)00354-5

Weinheimer, A. J., Montzka, D. D., Campos, T. L., James Walega, Ridley, B. A., Donnelly, S. G., Keim, E. R., Del Negro, L. A., Proffitt, M. H., Margitan, J. J., Boering, K. A., Andrews, A. E., Daube, B. C, Wofsy, S. C., Anderson, B. E., Collins, J. E., Sachse, G. W., Vay, S. A., Elkins, J. W., Wamsley, P. R., Atlas, E. L., Flocke, F., Schauffler, S., Webster, C. R., May, R. D., Loewenstein, M., Podolske, J. R., Bui, T. P., Chan, K. R., Bowen, S. W., Schoeberl, M. R., Lait, L. R., Newman, P. A. 1998: Comparison between DC-8 and ER-2 species measurements in the tropical middle troposphere: NO, NOy, O-3, CO2, CH4, and N2O. Journal of Geophysical Research—Atmospheres, 103(D17): 22087-22096. DOI: 10.1029/98JD01421