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1. The air we breathe: Past, present, and future: general discussion

Author

Paul Young, Mathew J. Evans, Olajide Olawoyin, Christopher J. Kampf, A. R. Ravishankara, Forrest Lacey, Andreas Wahner, Stephen Arnold, Thorsten Bartels-Rausch, Timothy J. Wallington, Jesse H. Kroll, Scott Archer-Nicholls, Nadine Unger, Jonathan P. Reid, Yinon Rudich, Colette L. Heald, Jennifer G. Murphy, Alla Zelenyuk, Jos Lelieveld, Ruth M. Doherty, Steven S. Brown, Dwayne E. Heard, Markus Kalberer, Morgan R. Edwards, Jacqueline F. Hamilton, Luke Conibear, William J. Collins, Jacinta Edebeli, Rachel Dunmore, Meredith G. Hastings, Drew Shindell, Eloise A. Marais, Daniel A. Knopf, Lucy J. Carpenter, Astrid Kiendler-Scharr, Barbara J. Finlayson-Pitts, Jonathan Williams, and Alexander T. Archibald

Subjects
05 social sciences, 050501 criminology, Environmental science, Physical and Theoretical Chemistry, Data science, 0505 law
Published
2017

2. Ambient and laboratory observations of organic ammonium salts in PM1

Author

Astrid Kiendler-Scharr, Marcel M. Moerman, Thomas F. Mentel, Patrick Schlag, David Reimer, Francesco Canonaco, André S. H. Prévôt, René Otjes, J. S. Henzing, Franz Rohrer, Florian Rubach, Ralf Tillmann, Ernest Weingartner, and Bernadette Rosati

Subjects
010504 meteorology & atmospheric sciences, Planetary boundary layer, Inorganic chemistry, Aerosol chemical composition, 010501 environmental sciences, Particulates, 01 natural sciences, Mass spectrometric, Atmospheric research, Aerosol, Organic fraction, chemistry.chemical_compound, chemistry, Environmental chemistry, Ammonium, Physical and Theoretical Chemistry, 0105 earth and related environmental sciences
Abstract

Ambient measurements of PM1aerosol chemical composition at Cabauw, the Netherlands, implicate higher ammonium concentrations than explained by the formation of inorganic ammonium salts. This additional particulate ammonium is called excess ammonium (eNH4). Height profiles over the Cabauw Experimental Site for Atmospheric Research (CESAR) tower, of combined ground based and airborne aerosol mass spectrometric (AMS) measurements on a Zeppelin airship show higher concentrations ofeNH4at higher altitudes compared to the ground. Through flights across the Netherlands, the Zeppelin based measurements furthermore substantiateeNH4as a regional phenomenon in the planetary boundary layer. The excess ammonium correlates with mass spectral signatures of (di-)carboxylic acids, making a heterogeneous acid–base reaction the likely process of NH3uptake. We show that this excess ammonium was neutralized by the organic fraction forming particulate organic ammonium salts. We discuss the significance of such organic ammonium salts for atmospheric aerosols and suggest that NH3emission control will have benefits for particulate matter control beyond the reduction of inorganic ammonium salts.

Published
2017

3. Chemical complexity of the urban atmosphere and its consequences: general discussion

Author

Timothy J. Wallington, Paul S. Monks, Dwayne E. Heard, M. S. Alam, Matthew Hort, William H. Brune, Roy M. Harrison, Franz M. Geiger, André S. H. Prévôt, Spyros N. Pandis, Alastair C. Lewis, Nicolas Moussiopoulos, Brian C. McDonald, Gordon McFiggans, C. N. Hewitt, Urs Baltensperger, Jacqueline F. Hamilton, Astrid Kiendler-Scharr, Eben S. Cross, Francis D. Pope, Athanasia Vlachou, Neil M. Donahue, Albert A. Presto, Gary Fuller, Lisa K. Whalley, Andreas Wahner, Markus Kalberer, Rachel Dunmore, Xavier Querol, Roberto Sommariva, Alison S. Tomlin, Nivedita K. Kumar, Saewung Kim, Andreas N. Skouloudis, Jose L. Jimenez, William J. Bloss, Rob MacKenzie, Simone M. Pieber, John C. Wenger, and Dominik van Pinxteren

Subjects
Aerosols, Atmosphere, Volatile Organic Compounds, Air Pollution, Earth science, Environmental science, Polycyclic Aromatic Hydrocarbons, Physical and Theoretical Chemistry, Mass Spectrometry
Published
2016

4. Atmospheric chemistry and the biosphere: general discussion

Author

Dwayne E. Heard, Astrid Kiendler-Scharr, Andreas Wahner, Steven S. Brown, Drew Shindell, Frank N. Keutsch, Timothy J. Wallington, Stephen Arnold, William J. Collins, Alla Zelenyuk, Andreas Petzold, Meredith G. Hastings, Paul Young, Nadine Unger, Gabriel Isaacman-VanWertz, Tomás Sherwen, Daniel A. Knopf, Lucy J. Carpenter, C. N. Hewitt, Jonathan P. Reid, Mathew J. Evans, Markus Kalberer, Catherine E. Scott, A. R. Ravishankara, Eloise A. Marais, Barbara J. Finlayson-Pitts, Lustinian Bejan, Grazia Rovelli, Christian George, Jos Lelieveld, Liselotte Tinel, Martin Brüggemann, Jonathan Williams, and Alexander T. Archibald

Subjects
Atmospheric chemistry, Biosphere, Environmental science, 010501 environmental sciences, Physical and Theoretical Chemistry, Atmospheric sciences, 01 natural sciences, 0105 earth and related environmental sciences
Published
2017

5. New tools for atmospheric chemistry: general discussion

Author

Steven S. Brown, Roderic L. Jones, A. R. Ravishankara, Peter A. Alpert, Craig A. Taatjes, Gabriel Isaacman-VanWertz, Timothy J. Wallington, Jing Dou, Andreas Wahner, Stephen Arnold, Jonathan P. Reid, Aleksandra Marsh, Andrew R. Rickard, Yinon Rudich, Andreas Petzold, Meredith G. Hastings, Andrew Grantham, Jos Lelieveld, Alla Zelenyuk, Jacinta Edebeli, Adam R. Vaughan, Grazia Rovelli, Paul Young, Hugh Coe, William C. Porter, Markus Kalberer, Barbara J. Finlayson-Pitts, Steven C. Campbell, Sarah Moller, Dwayne E. Heard, Astrid Kiendler-Scharr, Alastair C. Lewis, Kirsti Ashworth, Jacqueline F. Hamilton, Jonathan Williams, Alexander T. Archibald, Daniel A. Knopf, Lucy J. Carpenter, Eloise A. Marais, and Jesse H. Kroll

Subjects
Atmospheric chemistry, Environmental science, Physical and Theoretical Chemistry, Atmospheric sciences
Published
2017

7. Numerical modelling strategies for the urban atmosphere: general discussion

Author

Dwayne E. Heard, Markus Kalberer, Sasha Madronich, C. N. Hewitt, James D. Lee, Lisa K. Whalley, Roberto Sommariva, John C. Wenger, Rachel Dunmore, M. S. Alam, Brian C. McDonald, Neil M. Donahue, Jörg Kleffmann, Matthew Hort, Karine Sartelet, Irina Nikolova, Andreas Wahner, Thomas Karl, Sarah Moller, Gordon McFiggans, Ruth M. Doherty, Shupeng Zhu, Albert A. Presto, Andreas N. Skouloudis, Roy M. Harrison, Spyros N. Pandis, I. Kilbane-Dawe, Urs Baltensperger, Jose L. Jimenez, Rob MacKenzie, Astrid Kiendler-Scharr, and Alison S. Tomlin

Subjects
Atmosphere, Aerosols, Air Pollution, Environmental science, Particulate Matter, Physical and Theoretical Chemistry, Cities, Models, Theoretical, Atmospheric sciences, Oxidation-Reduction
Published
2016

8. Atmospheric chemistry and the biosphere: general discussion

Author

Archibald, Alexander, primary, Arnold, Stephen, additional, Bejan, Lustinian, additional, Brown, Steven, additional, Brüggemann, Martin, additional, Carpenter, Lucy J., additional, Collins, William, additional, Evans, Mathew, additional, Finlayson-Pitts, Barbara, additional, George, Christian, additional, Hastings, Meredith, additional, Heard, Dwayne, additional, Hewitt, C. N., additional, Isaacman-VanWertz, Gabriel, additional, Kalberer, Markus, additional, Keutsch, Frank, additional, Kiendler-Scharr, Astrid, additional, Knopf, Daniel, additional, Lelieveld, Jos, additional, Marais, Eloise, additional, Petzold, Andreas, additional, Ravishankara, A., additional, Reid, Jonathan, additional, Rovelli, Grazia, additional, Scott, Catherine, additional, Sherwen, Tomás, additional, Shindell, Drew, additional, Tinel, Liselotte, additional, Unger, Nadine, additional, Wahner, Andreas, additional, Wallington, Timothy J., additional, Williams, Jonathan, additional, Young, Paul, additional, and Zelenyuk, Alla, additional

Published
2017
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9. The air we breathe: Past, present, and future: general discussion

Author

Archer-Nicholls, Scott, primary, Archibald, Alexander, additional, Arnold, Stephen, additional, Bartels-Rausch, Thorsten, additional, Brown, Steven, additional, Carpenter, Lucy J., additional, Collins, William, additional, Conibear, Luke, additional, Doherty, Ruth, additional, Dunmore, Rachel, additional, Edebeli, Jacinta, additional, Edwards, Morgan, additional, Evans, Mathew, additional, Finlayson-Pitts, Barbara, additional, Hamilton, Jacqueline, additional, Hastings, Meredith, additional, Heald, Colette, additional, Heard, Dwayne, additional, Kalberer, Markus, additional, Kampf, Christopher, additional, Kiendler-Scharr, Astrid, additional, Knopf, Daniel, additional, Kroll, Jesse, additional, Lacey, Forrest, additional, Lelieveld, Jos, additional, Marais, Eloise, additional, Murphy, Jennifer, additional, Olawoyin, Olajide, additional, Ravishankara, A., additional, Reid, Jonathan, additional, Rudich, Yinon, additional, Shindell, Drew, additional, Unger, Nadine, additional, Wahner, Andreas, additional, Wallington, Timothy J., additional, Williams, Jonathan, additional, Young, Paul, additional, and Zelenyuk, Alla, additional

Published
2017
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10. Atmospheric chemistry processes: general discussion

Author

Archibald, Alexander, primary, Arnold, Stephen, additional, Bartels-Rausch, Thorsten, additional, Brown, Steven, additional, Caravan, Rebecca, additional, Carpenter, Lucy J., additional, Chhantyal-Pun, Rabi, additional, Coe, Hugh, additional, Dou, Jing, additional, Edebeli, Jacinta, additional, Evans, Mathew, additional, Finlayson-Pitts, Barbara, additional, George, Christian, additional, Hamilton, Jacqueline, additional, Heald, Colette, additional, Heard, Dwayne, additional, Hewitt, C. N., additional, Isaacman-VanWertz, Gabriel, additional, Jones, Roderic, additional, Kalberer, Markus, additional, Kampf, Christopher, additional, Kerminen, Veli-Matti, additional, Kiendler-Scharr, Astrid, additional, Knopf, Daniel, additional, Kroll, Jesse, additional, Lelieveld, Jos, additional, Marais, Eloise, additional, McGillen, Max, additional, Mellouki, Abdelwahid, additional, Petzold, Andreas, additional, Ravishankara, A., additional, Rickard, Andrew, additional, Rudich, Y., additional, Taatjes, Craig, additional, Wahner, Andreas, additional, Williams, Jonathan, additional, and Zelenyuk, Alla, additional

Published
2017
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11. Ambient and laboratory observations of organic ammonium salts in PM1

Author

Schlag, P., primary, Rubach, F., additional, Mentel, T. F., additional, Reimer, D., additional, Canonaco, F., additional, Henzing, J. S., additional, Moerman, M., additional, Otjes, R., additional, Prévôt, A. S. H., additional, Rohrer, F., additional, Rosati, B., additional, Tillmann, R., additional, Weingartner, E., additional, and Kiendler-Scharr, A., additional

Published
2017
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12. New tools for atmospheric chemistry: general discussion

Author

Alpert, Peter, primary, Archibald, Alexander, additional, Arnold, Stephen, additional, Ashworth, Kirsti, additional, Brown, Steven, additional, Campbell, Steven, additional, Carpenter, Lucy J., additional, Coe, Hugh, additional, Dou, Jing, additional, Edebeli, Jacinta, additional, Finlayson-Pitts, Barbara, additional, Grantham, Andrew, additional, Hamilton, Jacqueline, additional, Hastings, Meredith, additional, Heard, Dwayne, additional, Isaacman-VanWertz, Gabriel, additional, Jones, Roderic, additional, Kalberer, Markus, additional, Kiendler-Scharr, Astrid, additional, Knopf, Daniel, additional, Kroll, Jesse, additional, Lelieveld, Jos, additional, Lewis, Alastair, additional, Marais, Eloise, additional, Marsh, Aleksandra, additional, Moller, Sarah, additional, Petzold, Andreas, additional, Porter, William, additional, Ravishankara, A., additional, Reid, Jonathan, additional, Rickard, Andrew, additional, Rovelli, Grazia, additional, Rudich, Yinon, additional, Taatjes, Craig, additional, Vaughan, Adam, additional, Wahner, Andreas, additional, Wallington, Timothy J., additional, Williams, Jonathan, additional, Young, Paul, additional, and Zelenyuk, Alla, additional

Published
2017
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13. Numerical modelling strategies for the urban atmosphere: general discussion

Author

MacKenzie, Rob, primary, Tomlin, Alison, additional, Kleffmann, Jörg, additional, Karl, Thomas, additional, Hewitt, C. N., additional, Heard, Dwayne, additional, Sartelet, Karine, additional, Sommariva, Roberto, additional, Baltensperger, Urs, additional, Harrison, Roy, additional, Madronich, Sasha, additional, McFiggans, Gordon, additional, Pandis, Spyros, additional, Wenger, John, additional, Kiendler-Scharr, Astrid, additional, Donahue, Neil M., additional, Dunmore, Rachel, additional, Doherty, Ruth, additional, Moller, Sarah, additional, Kilbane-Dawe, Iarla, additional, McDonald, Brian, additional, Wahner, Andreas, additional, Zhu, Shupeng, additional, Presto, Albert, additional, Kalberer, Markus, additional, Hort, Matthew, additional, Lee, James, additional, Nikolova, Irina, additional, Jimenez, Jose L., additional, Whalley, Lisa, additional, Alam, Mohammed Salim, additional, and Skouloudis, Andreas, additional

Published
2016
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14. Urban case studies: general discussion

Author

Brune, William, primary, Bloss, William, additional, Shi, Zongbo, additional, Pope, Francis, additional, Fuller, Gary, additional, Monks, Paul S., additional, Tomlin, Alison, additional, Karl, Thomas, additional, Hort, Matthew, additional, Mohr, Claudia, additional, MacKenzie, Rob, additional, Vlachou, Athanasia, additional, Tian, Zhe, additional, Kramer, Louisa J., additional, Heard, Dwayne, additional, Purvis, Ruth, additional, Querol, Xavier, additional, Baltensperger, Urs, additional, Dunmore, Rachel, additional, Harrison, Roy, additional, Murrells, Tim, additional, Jimenez, Jose L., additional, Cross, Eben, additional, McFiggans, Gordon, additional, Kiendler-Scharr, Astrid, additional, Ho, Tzer-Ren, additional, Charron, Aurélie, additional, Wallington, Timothy, additional, Krishna Kumar, Nivedita, additional, Pieber, Simone, additional, Geiger, Franz, additional, Wahner, Andreas, additional, Mitchell, Edward, additional, Prévôt, André, additional, Skouloudis, Andreas, additional, Kalberer, Markus, additional, McDonald, Brian, additional, Hewitt, C. N., additional, Sioutas, Costas, additional, Donahue, Neil. M., additional, Lee, James, additional, van Pinxteren, Dominik, additional, Moller, Sarah, additional, Minguillón, María Cruz, additional, Shafer, Martin, additional, Carslaw, David, additional, Ehlers, Christian, additional, and Pandis, Spyros, additional

Published
2016
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16. Chemical complexity of the urban atmosphere and its consequences: general discussion

Author

Geiger, Franz, primary, Pope, Francis, additional, MacKenzie, Rob, additional, Brune, William, additional, Monks, Paul S., additional, Bloss, William, additional, Fuller, Gary, additional, Moussiopoulos, Nicolas, additional, Hort, Matthew, additional, Tomlin, Alison, additional, Presto, Albert, additional, van Pinxteren, Dominik, additional, Vlachou, Athanasia, additional, Heard, Dwayne, additional, Hewitt, C. N., additional, Baltensperger, Urs, additional, Lewis, Alastair, additional, Querol, Xavier, additional, Kim, Saewung, additional, Hamilton, Jacqueline, additional, Sommariva, Roberto, additional, McFiggans, Gordon, additional, Harrison, Roy, additional, Jimenez, Jose L., additional, Cross, Eben, additional, Wenger, John, additional, Pandis, Spyros, additional, Kiendler-Scharr, Astrid, additional, Donahue, Neil M., additional, Whalley, Lisa, additional, McDonald, Brian, additional, Pieber, Simone, additional, Prévôt, André, additional, Alam, Mohammed Salim, additional, Krishna Kumar, Nivedita, additional, Wahner, Andreas, additional, Skouloudis, Andreas, additional, Kalberer, Markus, additional, Wallington, Timothy, additional, and Dunmore, Rachel, additional

Published
2016
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17. Ambient and laboratory observations of organic ammonium salts in PM1.

Author

Schlag, P., Rubach, F., Mentel, T. F., Reimer, D., Canonaco, F., Henzing, J. S., Moerman, M., Otjes, R., Prévôt, A. S. H., Rohrer, F., Rosati, B., Tillmann, R., Weingartner, E., and Kiendler-Scharr, A.

Abstract

Ambient measurements of PM1 aerosol chemical composition at Cabauw, the Netherlands, implicate higher ammonium concentrations than explained by the formation of inorganic ammonium salts. This additional particulate ammonium is called excess ammonium (eNH4). Height profiles over the Cabauw Experimental Site for Atmospheric Research (CESAR) tower, of combined ground based and airborne aerosol mass spectrometric (AMS) measurements on a Zeppelin airship show higher concentrations of eNH4 at higher altitudes compared to the ground. Through flights across the Netherlands, the Zeppelin based measurements furthermore substantiate eNH4 as a regional phenomenon in the planetary boundary layer. The excess ammonium correlates with mass spectral signatures of (di-)carboxylic acids, making a heterogeneous acid–base reaction the likely process of NH3 uptake. We show that this excess ammonium was neutralized by the organic fraction forming particulate organic ammonium salts. We discuss the significance of such organic ammonium salts for atmospheric aerosols and suggest that NH3 emission control will have benefits for particulate matter control beyond the reduction of inorganic ammonium salts. [ABSTRACT FROM AUTHOR]

Published
2017
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18. General discussion

Author

Jesse H. Kroll, J. Abbatt, Neil M. Donahue, J. Abbat, Rainer Volkamer, M. Jacobson, A. Held, Andreas Wahner, D. Knopf, Yinon Rudich, A. Lewis, D. Heard, Hanna Vehkamäki, T. Cox, M. Freedman, B. Aumont, Tinja Olenius, B. Noziere, I. K. Colomer Ortega, E. Villenave, David Michele Cappelletti, H. Herrmann, R. Harrison, Spyros N. Pandis, Kenneth S. Carslaw, A. Kiendler Scharr, M. Johnston, James Allan, G. Mc Figgans, V. F. Mcneill, U. Krieger, C. Percival, S. Nizkorodov, and A. Colussi

Subjects
Tropospheric aerosol, Environmental science, Physical and Theoretical Chemistry, Atmospheric sciences
Published
2013

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