Search Results - "Middlebrook, Ann M"

Evaluation of Composition-Dependent Collection Efficiencies for the Aerodyne Aerosol Mass Spectrometer using Field Data by Middlebrook, Ann M., Bahreini, Roya, Jimenez, Jose L., Canagaratna, Manjula R.

“…In recent years, Aerodyne aerosol mass spectrometers (AMS) have been used in many locations around the world to study the size-resolved, nonrefractory chemical…”
Get full text

Brown carbon and internal mixing in biomass burning particles by Lack, Daniel A, Langridge, Justin M, Bahreini, Roya, Cappa, Christopher D, Middlebrook, Ann M, Schwarz, Joshua P

“…Biomass burning (BB) contributes large amounts of black carbon (BC) and particulate organic matter (POM) to the atmosphere and contributes significantly to the…”
Get full text

An evaluation of global organic aerosol schemes using airborne observations by Pai, Sidhant J, Heald, Colette L, Pierce, Jeffrey R, Farina, Salvatore C, Marais, Eloise A, Jimenez, Jose L, Campuzano-Jost, Pedro, Nault, Benjamin A, Middlebrook, Ann M, Coe, Hugh, Shilling, John E, Bahreini, Roya, Dingle, Justin H, Vu, Kennedy

“…Chemical transport models have historically struggled to accurately simulate the magnitude and variability of observed organic aerosol (OA), with previous…”
Get full text

A large atomic chlorine source inferred from mid-continental reactive nitrogen chemistry by Quinn, Patricia K, Wagner, Nicholas L, Middlebrook, Ann M, Dubé, William P, Cozic, Julie, Brown, Steven S, Wolfe, Glenn M, Kercher, James P, Alexander, Becky, Riedel, Theran P, Thornton, Joel A, Holloway, John S

“…Halogen atoms and oxides are highly reactive and can profoundly affect atmospheric composition. Chlorine atoms can decrease the lifetimes of gaseous elemental…”
Get full text

Collection Efficiencies in an Aerodyne Aerosol Mass Spectrometer as a Function of Particle Phase for Laboratory Generated Aerosols by Matthew, Brendan M., Middlebrook, Ann M., Onasch, Timothy B.

“…The Aerodyne Aerosol Mass Spectrometer (AMS) is a useful tool to study ambient particles. To be quantitative, the mass or (number) of particles detected by the…”
Get full text

A new method to quantify mineral dust and other aerosol species from aircraft platforms using single-particle mass spectrometry by Froyd, Karl D, Murphy, Daniel M, Brock, Charles A, Campuzano-Jost, Pedro, Dibb, Jack E, Jimenez, Jose-Luis, Kupc, Agnieszka, Middlebrook, Ann M, Schill, Gregory P, Thornhill, Kenneth L, Williamson, Christina J, Wilson, James C, Ziemba, Luke D

“…Single-particle mass spectrometry (SPMS) instruments characterize the composition of individual aerosol particles in real time. Their fundamental ability to…”
Get full text

Complex refractive indices in the ultraviolet and visible spectral region for highly absorbing non-spherical biomass burning aerosol by Womack, Caroline C, Manfred, Katherine M, Wagner, Nicholas L, Adler, Gabriela, Franchin, Alessandro, Lamb, Kara D, Middlebrook, Ann M, Schwarz, Joshua P, Brock, Charles A, Brown, Steven S, Washenfelder, Rebecca A

“…Biomass burning aerosol is a major source of PM2.5, and significantly affects Earth's radiative budget. The magnitude of its radiative effect is poorly…”
Get full text

Airborne and ground-based observations of ammonium-nitrate-dominated aerosols in a shallow boundary layer during intense winter pollution episodes in northern Utah by Franchin, Alessandro, Fibiger, Dorothy L, Goldberger, Lexie, McDuffie, Erin E, Moravek, Alexander, Womack, Caroline C, Crosman, Erik T, Docherty, Kenneth S, Dube, William P, Hoch, Sebastian W, Lee, Ben H, Long, Russell, Murphy, Jennifer G, Thornton, Joel A, Brown, Steven S, Baasandorj, Munkhbayar, Middlebrook, Ann M

“…Airborne and ground-based measurements of aerosol concentrations, chemical composition, and gas-phase precursors were obtained in three valleys in northern…”
Get full text

Direct observations of N2O5 reactivity on ambient aerosol particles by Bertram, Timothy H., Thornton, Joel A., Riedel, Theran P., Middlebrook, Ann M., Bahreini, Roya, Bates, Timothy S., Quinn, Patricia K., Coffman, Derek J.

“…N2O5 reactivity has been measured directly for the first time on ambient aerosol particles using an entrained aerosol flow reactor coupled to a custom‐built…”
Get full text

Observational constraints on glyoxal production from isoprene oxidation and its contribution to organic aerosol over the Southeast United States by Li, Jingyi, Mao, Jingqiu, Min, Kyung‐Eun, Washenfelder, Rebecca A., Brown, Steven S., Kaiser, Jennifer, Keutsch, Frank N., Volkamer, Rainer, Wolfe, Glenn M., Hanisco, Thomas F., Pollack, Ilana B., Ryerson, Thomas B., Graus, Martin, Gilman, Jessica B., Lerner, Brian M., Warneke, Carsten, Gouw, Joost A., Middlebrook, Ann M., Liao, Jin, Welti, André, Henderson, Barron H., McNeill, V. Faye, Hall, Samuel R., Ullmann, Kirk, Donner, Leo J., Paulot, Fabien, Horowitz, Larry W.

“…We use a 0‐D photochemical box model and a 3‐D global chemistry‐climate model, combined with observations from the NOAA Southeast Nexus (SENEX) aircraft…”
Get full text

Impact of Fuel Quality Regulation and Speed Reductions on Shipping Emissions: Implications for Climate and Air Quality by Lack, Daniel A, Cappa, Christopher D, Langridge, Justin, Bahreini, Roya, Buffaloe, Gina, Brock, Charles, Cerully, Kate, Coffman, Derek, Hayden, Katherine, Holloway, John, Lerner, Brian, Massoli, Paola, Li, Shao-Meng, McLaren, Robert, Middlebrook, Ann M, Moore, Richard, Nenes, Athanasios, Nuaaman, Ibraheem, Onasch, Timothy B, Peischl, Jeff, Perring, Anne, Quinn, Patricia K, Ryerson, Tom, Schwartz, Joshua P, Spackman, Ryan, Wofsy, Steven C, Worsnop, Doug, Xiang, Bin, Williams, Eric

“…Atmospheric emissions of gas and particulate matter from a large ocean-going container vessel were sampled as it slowed and switched from high-sulfur to…”
Get full text

Comment on "The effects of molecular weight and thermal decomposition on the sensitivity of a thermal desorption aerosol mass spectrometer" by Jimenez, Jose L., Canagaratna, Manjula R., Drewnick, Frank, Allan, James D., Alfarra, M. Rami, Middlebrook, Ann M., Slowik, Jay G., Zhang, Qi, Coe, Hugh, Jayne, John T., Worsnop, Douglas R.

“…Copyright © American Association for Aerosol Research…”
Get full text

Air quality implications of the Deepwater Horizon oil spill by Middlebrook, Ann M, Murphy, Daniel M, Ahmadov, Ravan, Atlas, Elliot L, Bahreini, Roya, Blake, Donald R, Brioude, Jerome, de Gouw, Joost A, Fehsenfeld, Fred C, Frost, Gregory J, Holloway, John S, Lack, Daniel A, Langridge, Justin M, Lueb, Rich A, McKeen, Stuart A, Meagher, James F, Meinardi, Simone, Neuman, J. Andrew, Nowak, John B, Parrish, David D, Peischl, Jeff, Perring, Anne E, Pollack, Ilana B, Roberts, James M, Ryerson, Thomas B, Schwarz, Joshua P, Spackman, J. Ryan, Warneke, Carsten, Ravishankara, A. R

“…During the Deepwater Horizon (DWH) oil spill, a wide range of gas and aerosol species were measured from an aircraft around, downwind, and away from the DWH…”
Get full text

Characterization of a catalyst-based conversion technique to measure total particulate nitrogen and organic carbon and comparison to a particle mass measurement instrument by Stockwell, Chelsea E, Kupc, Agnieszka, Witkowski, Bartłomiej, Talukdar, Ranajit K, Liu, Yong, Selimovic, Vanessa, Zarzana, Kyle J, Sekimoto, Kanako, Warneke, Carsten, Washenfelder, Rebecca A, Yokelson, Robert J, Middlebrook, Ann M, Roberts, James M

“…The chemical composition of aerosol particles is a key aspect in determining their impact on the environment. For example, nitrogen-containing particles impact…”
Get full text

Understanding the role of the ground surface in HONO vertical structure: High resolution vertical profiles during NACHTT-11 by VandenBoer, Trevor C., Brown, Steven S., Murphy, Jennifer G., Keene, William C., Young, Cora J., Pszenny, A. A. P., Kim, S., Warneke, Carsten, de Gouw, Joost A., Maben, John R., Wagner, Nicholas L., Riedel, Theran P., Thornton, Joel A., Wolfe, Daniel E., Dubé, William P., Öztürk, Fatma, Brock, Charles A., Grossberg, Nicole, Lefer, Barry, Lerner, Brian, Middlebrook, Ann M., Roberts, James M.

“…A negative‐ion proton‐transfer chemical ionization mass spectrometer was deployed on a mobile tower‐mounted platform during Nitrogen, Aerosol Composition, and…”
Get full text

Role of Criegee Intermediates in Secondary Sulfate Aerosol Formation in Nocturnal Power Plant Plumes in the Southeast US by Meidan, Daphne, Holloway, John S, Edwards, Pete M, Dubé, William P, Middlebrook, Ann M, Liao, Jin, Welti, André, Graus, Martin, Warneke, Carsten, Ryerson, Thomas B, Pollack, Ilana B, Brown, Steven S, Rudich, Yinon

“…Criegee intermediates (CI) from ozonolysis of biogenic volatile organic compounds (BVOC) have been suggested to be important atmospheric oxidants. However, due…”
Get full text

Nitrogen, Aerosol Composition, and Halogens on a Tall Tower (NACHTT): Overview of a wintertime air chemistry field study in the front range urban corridor of Colorado by Brown, Steven S., Thornton, Joel A., Keene, William C., Pszenny, Alexander A. P., Sive, Barkley C., Dubé, William P., Wagner, Nicholas L., Young, Cora J., Riedel, Theran P., Roberts, James M., VandenBoer, Trevor C., Bahreini, Roya, Öztürk, Fatma, Middlebrook, Ann M., Kim, Saewung, Hübler, Gerhard, Wolfe, Daniel E.

“…The Nitrogen, Aerosol Composition, and Halogens on a Tall Tower (NACHTT) field experiment took place during late winter, 2011, at a site 33 km north of Denver,…”
Get full text

Observations of organic material in individual marine particles at Cape Grim during the First Aerosol Characterization Experiment (ACE 1) by Middlebrook, Ann M., Murphy, Daniel M., Thomson, David S.

“…During the First Aerosol Characterization Experiment (ACE 1) field campaign in November and December 1995, the particle analysis by laser mass spectrometry…”
Get full text

Anthropogenic enhancements to production of highly oxygenated molecules from autoxidation by Pye, Havala O. T., D’Ambro, Emma L., Lee, Ben H., Schobesberger, Siegfried, Takeuchi, Masayuki, Zhao, Yue, Lopez-Hilfiker, Felipe, Liu, Jiumeng, Shilling, John E., Xing, Jia, Mathur, Rohit, Middlebrook, Ann M., Liao, Jin, Welti, André, Graus, Martin, Warneke, Carsten, de Gouw, Joost A., Holloway, John S., Ryerson, Thomas B., Pollack, Ilana B., Thornton, Joel A.

“…Atmospheric oxidation of natural and anthropogenic volatile organic compounds (VOCs) leads to secondary organic aerosol (SOA), which constitutes a major and…”
Get full text

Transport of Asian ozone pollution into surface air over the western United States in spring by Lin, Meiyun, Fiore, Arlene M., Horowitz, Larry W., Cooper, Owen R., Naik, Vaishali, Holloway, John, Johnson, Bryan J., Middlebrook, Ann M., Oltmans, Samuel J., Pollack, Ilana B., Ryerson, Tomas B., Warner, Juying X., Wiedinmyer, Christine, Wilson, John, Wyman, Bruce

“…Many prior studies clearly document episodic Asian pollution in the western U.S. free troposphere. Here, we examine the mechanisms involved in the transport of…”
Get full text