Journal of Geophysical Research: Atmospheres

Nitrogen, Aerosol Composition and Halogens Over a Tall Tower
  1. Regular Articles

    1. Top of page
    2. Regular Articles
    3. Research Articles
    1. Composition and Chemistry

      Vertically resolved chemical characteristics and sources of submicron aerosols measured on a Tall Tower in a suburban area near Denver, Colorado in winter (pages 13,591–13,605)

      F. Öztürk, R. Bahreini, N. L. Wagner, W. P. Dubé, C. J. Young, S. S. Brown, C. A. Brock, I. M. Ulbrich, J. L. Jimenez, O. R. Cooper and A. M. Middlebrook

      Article first published online: 18 DEC 2013 | DOI: 10.1002/2013JD019923

      Key Points

      • Aerosol concentrations were low above 120 m of tower height
      • Regional transport (local pollution) influenced aerosol at 40–120 m (40 m)
      • On average organic aerosol was dominated by the highly oxygenated fraction
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      Volatile organic compound distributions during the NACHTT campaign at the Boulder Atmospheric Observatory: Influence of urban and natural gas sources (pages 10,614–10,637)

      Robert F. Swarthout, Rachel S. Russo, Yong Zhou, Andrew H. Hart and Barkley C. Sive

      Article first published online: 23 SEP 2013 | DOI: 10.1002/jgrd.50722

      Key Points

      • A comprehensive suite of VOCs was measured near active natural gas production
      • Natural gas production resulted in elevated mixing ratios of C2-C8 alkanes.
      • Regional emission fluxes and hydroxyl radical reactivity were estimated
    3. Understanding the role of the ground surface in HONO vertical structure: High resolution vertical profiles during NACHTT-11 (pages 10,155–10,171)

      Trevor C. VandenBoer, Steven S. Brown, Jennifer G. Murphy, William C. Keene, Cora J. Young, A. A. P. Pszenny, S. Kim, Carsten Warneke, Joost A. de Gouw, John R. Maben, Nicholas L. Wagner, Theran P. Riedel, Joel A. Thornton, Daniel E. Wolfe, William P. Dubé, Fatma Öztürk, Charles A. Brock, Nicole Grossberg, Barry Lefer, Brian Lerner, Ann M. Middlebrook and James M. Roberts

      Article first published online: 5 SEP 2013 | DOI: 10.1002/jgrd.50721

      Key Points

      • HONO vertical gradients form on nights with stable nocturnal boundary layers
      • Nocturnal HONO production consistent with ground surface area dominance
      • Surface deposition of HONO may be a reservoir for the unknown daytime source
    4. Phase partitioning of soluble trace gases with size-resolved aerosols in near-surface continental air over northern Colorado, USA, during winter (pages 9414–9427)

      Andrew H. Young, William C. Keene, Alexander A. P. Pszenny, Rolf Sander, Joel A. Thornton, Theran P. Riedel and John R. Maben

      Article first published online: 26 AUG 2013 | DOI: 10.1002/jgrd.50655

      Key Points

      • Cl was primarily associated with supermicrometer aerosol particles
      • Aerosols were acidic across sampled size fractions and time period
      • Total Cl exceeded ClNO2, suggesting that Cl did not limit ClNO2 formation
    5. N2O5 uptake coefficients and nocturnal NO2 removal rates determined from ambient wintertime measurements (pages 9331–9350)

      N. L. Wagner, T. P. Riedel, C. J. Young, R. Bahreini, C. A. Brock, W. P. Dubé, S. Kim, A. M. Middlebrook, F. Öztürk, J. M. Roberts, R. Russo, B. Sive, R. Swarthout, J. A. Thornton, T. C. VandenBoer, Y. Zhou and S. S. Brown

      Article first published online: 20 AUG 2013 | DOI: 10.1002/jgrd.50653

      Key Points

      • The N2O5 uptake coefficient is suppressed in ambient aerosol by nitrate.
      • Uptake coefficients are not suppressed enough to limit the rate of NOx loss.
      • The N2O5 hydrolysis consumes 80% of the nitrate radical production (O3 + NO2).
    6. Chlorine activation within urban or power plant plumes: Vertically resolved ClNO2 and Cl2 measurements from a tall tower in a polluted continental setting (pages 8702–8715)

      Theran P. Riedel, Nicholas L. Wagner, William P. Dubé, Ann M. Middlebrook, Cora J. Young, Fatma Öztürk, Roya Bahreini, Trevor C. VandenBoer, Daniel E. Wolfe, Eric J. Williams, James M. Roberts, Steven S. Brown and Joel A. Thornton

      Article first published online: 15 AUG 2013 | DOI: 10.1002/jgrd.50637

      Key Points

      • Vertical measurements of ClNO2 and Cl2 show large variability with height.
      • ClNO2 is enhanced in air only from polluted sectors.
      • Evidence for ClNO2 and Cl2 production/emission from local combustion sources.
    7. 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 (pages 8067–8085)

      Steven S. Brown, Joel A. Thornton, William C. Keene, Alexander A. P. Pszenny, Barkley C. Sive, William P. Dubé, Nicholas L. Wagner, Cora J. Young, Theran P. Riedel, James M. Roberts, Trevor C. VandenBoer, Roya Bahreini, Fatma Öztürk, Ann M. Middlebrook, Saewung Kim, Gerhard Hübler and Daniel E. Wolfe

      Article first published online: 30 JUL 2013 | DOI: 10.1002/jgrd.50537

      Key Points

      • NACHTT was a winter atmospheric chemistry study near Denver, Colorado
      • Vertically resolved measurements of nitrogen oxides, aerosols and halogens
  2. Research Articles

    1. Top of page
    2. Regular Articles
    3. Research Articles
    1. Composition and Chemistry

      New insights into atmospheric sources and sinks of isocyanic acid, HNCO, from recent urban and regional observations (pages 1060–1072)

      James M. Roberts, Patrick R. Veres, Trevor C. VandenBoer, Carsten Warneke, Martin Graus, Eric J. Williams, Barry Lefer, Charles A. Brock, Roya Bahreini, Fatma Öztürk, Ann M. Middlebrook, Nicholas L. Wagner, William P. Dubé and Joost A. de Gouw

      Article first published online: 17 JAN 2014 | DOI: 10.1002/2013JD019931

      Key Points

      • Atmospheric HNCO has both primary and photochemical sources
      • Agricultural burning can be a significant HNCO source
      • Deposition and heterogeneous reaction are the major sinks of HNCO