Evolution of aerosol properties impacting visibility and direct climate forcing in an ammonia-rich urban environment
Airborne measurements of sub‐micron aerosol and trace gases downwind of Los Angeles are used to investigate the influence of aging on aerosol properties relevant to climate forcing and visibility. The analysis focuses on the Los Angeles plume, which in addition to strong urban emissions is influence...
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| Veröffentlicht in: | Journal of Geophysical Research: Atmospheres 2012-11, Vol.117 (D21), p.n/a |
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| creator | Langridge, Justin M. Lack, Daniel Brock, Charles A. Bahreini, Roya Middlebrook, Ann M. Neuman, J. Andrew Nowak, John B. Perring, Anne E. Schwarz, Joshua P. Spackman, J. Ryan Holloway, John S. Pollack, Ilana B. Ryerson, Thomas B. Roberts, James M. Warneke, Carsten de Gouw, Joost A. Trainer, Michael K. Murphy, Daniel M. |
| description | Airborne measurements of sub‐micron aerosol and trace gases downwind of Los Angeles are used to investigate the influence of aging on aerosol properties relevant to climate forcing and visibility. The analysis focuses on the Los Angeles plume, which in addition to strong urban emissions is influenced by local agricultural emissions. Secondary organic aerosol formation and repartitioning of semi‐volatile ammonium nitrate were identified as key factors controlling the optical behavior observed. For one case study, ammonium nitrate contributed up to 50% of total dry extinction. At 85% relative humidity, extinction in the fresh plume was enhanced by a factor of ∼1.7, and 60–80% of this was from water associated with ammonium nitrate. On this day, loss of ammonium nitrate resulted in decreasing aerosol hygroscopicity with aging. Failing to account for loss of ammonium nitrate led to overestimation of the radiative cooling exerted by the most aged aerosol by ∼35% under dry conditions. These results show that changes to aerosol behavior with aging can impact visibility and climate forcing significantly. The importance of ammonium nitrate and water also highlight the need to improve the current representation of semi‐volatile aerosol species in large‐scale climate models.
Key Points
The visibility and climate impacts of aerosol change with aging
Ammonium nitrate formation/partitioning is important in the Los Angeles region |
| doi_str_mv | 10.1029/2011JD017116 |
| format | Article |
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Key Points
The visibility and climate impacts of aerosol change with aging
Ammonium nitrate formation/partitioning is important in the Los Angeles region</description><identifier>ISSN: 0148-0227</identifier><identifier>ISSN: 2169-897X</identifier><identifier>EISSN: 2156-2202</identifier><identifier>EISSN: 2169-8996</identifier><identifier>DOI: 10.1029/2011JD017116</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>aerosol aging ; aerosol optical properties ; Aerosols ; Aging ; Air pollution ; Ammonium ; Ammonium nitrate ; Applied sciences ; Atmospheric aerosols ; Atmospheric pollution ; Atmospheric sciences ; Climate models ; direct climate forcing ; Emissions ; Exact sciences and technology ; Geophysics ; Nitrates ; Pollutants physicochemistry study: properties, effects, reactions, transport and distribution ; Pollution ; Relative humidity ; Troposphere ; Urban environments ; Visibility</subject><ispartof>Journal of Geophysical Research: Atmospheres, 2012-11, Vol.117 (D21), p.n/a</ispartof><rights>Copyright 2012 by the American Geophysical Union</rights><rights>2014 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4790-92c120d8e77d45333c015ac6ef24e3e1d7898ef79e5743ba8c8b000778ad30373</citedby><cites>FETCH-LOGICAL-c4790-92c120d8e77d45333c015ac6ef24e3e1d7898ef79e5743ba8c8b000778ad30373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2011JD017116$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2011JD017116$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,11493,27901,27902,45550,45551,46384,46443,46808,46867</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26838353$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Langridge, Justin M.</creatorcontrib><creatorcontrib>Lack, Daniel</creatorcontrib><creatorcontrib>Brock, Charles A.</creatorcontrib><creatorcontrib>Bahreini, Roya</creatorcontrib><creatorcontrib>Middlebrook, Ann M.</creatorcontrib><creatorcontrib>Neuman, J. Andrew</creatorcontrib><creatorcontrib>Nowak, John B.</creatorcontrib><creatorcontrib>Perring, Anne E.</creatorcontrib><creatorcontrib>Schwarz, Joshua P.</creatorcontrib><creatorcontrib>Spackman, J. Ryan</creatorcontrib><creatorcontrib>Holloway, John S.</creatorcontrib><creatorcontrib>Pollack, Ilana B.</creatorcontrib><creatorcontrib>Ryerson, Thomas B.</creatorcontrib><creatorcontrib>Roberts, James M.</creatorcontrib><creatorcontrib>Warneke, Carsten</creatorcontrib><creatorcontrib>de Gouw, Joost A.</creatorcontrib><creatorcontrib>Trainer, Michael K.</creatorcontrib><creatorcontrib>Murphy, Daniel M.</creatorcontrib><title>Evolution of aerosol properties impacting visibility and direct climate forcing in an ammonia-rich urban environment</title><title>Journal of Geophysical Research: Atmospheres</title><addtitle>J. Geophys. Res</addtitle><description>Airborne measurements of sub‐micron aerosol and trace gases downwind of Los Angeles are used to investigate the influence of aging on aerosol properties relevant to climate forcing and visibility. The analysis focuses on the Los Angeles plume, which in addition to strong urban emissions is influenced by local agricultural emissions. Secondary organic aerosol formation and repartitioning of semi‐volatile ammonium nitrate were identified as key factors controlling the optical behavior observed. For one case study, ammonium nitrate contributed up to 50% of total dry extinction. At 85% relative humidity, extinction in the fresh plume was enhanced by a factor of ∼1.7, and 60–80% of this was from water associated with ammonium nitrate. On this day, loss of ammonium nitrate resulted in decreasing aerosol hygroscopicity with aging. Failing to account for loss of ammonium nitrate led to overestimation of the radiative cooling exerted by the most aged aerosol by ∼35% under dry conditions. These results show that changes to aerosol behavior with aging can impact visibility and climate forcing significantly. The importance of ammonium nitrate and water also highlight the need to improve the current representation of semi‐volatile aerosol species in large‐scale climate models.
Key Points
The visibility and climate impacts of aerosol change with aging
Ammonium nitrate formation/partitioning is important in the Los Angeles region</description><subject>aerosol aging</subject><subject>aerosol optical properties</subject><subject>Aerosols</subject><subject>Aging</subject><subject>Air pollution</subject><subject>Ammonium</subject><subject>Ammonium nitrate</subject><subject>Applied sciences</subject><subject>Atmospheric aerosols</subject><subject>Atmospheric pollution</subject><subject>Atmospheric sciences</subject><subject>Climate models</subject><subject>direct climate forcing</subject><subject>Emissions</subject><subject>Exact sciences and technology</subject><subject>Geophysics</subject><subject>Nitrates</subject><subject>Pollutants physicochemistry study: properties, effects, reactions, transport and distribution</subject><subject>Pollution</subject><subject>Relative humidity</subject><subject>Troposphere</subject><subject>Urban environments</subject><subject>Visibility</subject><issn>0148-0227</issn><issn>2169-897X</issn><issn>2156-2202</issn><issn>2169-8996</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqNkVtrFDEYhoMouLS96w8IiOCFU3OYHOZS27q6VAXxdBeymW80dSZZk8zq_vtm3VLECzE3geT5HvK-QeiUkjNKWPeMEUpXF4QqSuU9tGBUyIYxwu6jBaGtbghj6iE6yfma1NUK2RK6QOVyG8e5-BhwHLCFFHMc8SbFDaTiIWM_bawrPnzFW5_92o--7LANPe59AlewG_1kC-AhJrenfKi32E5TDN42ybtveE7regRh61MME4RyjB4MdsxwcrsfoY8vLz-cv2qu3i1fnz-_alyrOtJ0zFFGeg1K9a3gnDtChXUSBtYCB9or3WkYVAdCtXxttdPrGk0pbXtOuOJH6MnBW_P8mCEXM_nsYBxtgDhnU3trpWw15f-HCsYFqeijv9DrOKdQgxhKqeik0GIvfHqgXK00JxjMJtWm0q6q9rbO_PlhFX98K7XZ2XFINjif72aY1Fzz31p-4H76EXb_dJrV8v0FVZrsn9wcpnwu8OtuyqbvRiquhPn8dmn0l-WbFyvNzCd-A5bpsiM</recordid><startdate>20121116</startdate><enddate>20121116</enddate><creator>Langridge, Justin M.</creator><creator>Lack, Daniel</creator><creator>Brock, Charles A.</creator><creator>Bahreini, Roya</creator><creator>Middlebrook, Ann M.</creator><creator>Neuman, J. Andrew</creator><creator>Nowak, John B.</creator><creator>Perring, Anne E.</creator><creator>Schwarz, Joshua P.</creator><creator>Spackman, J. Ryan</creator><creator>Holloway, John S.</creator><creator>Pollack, Ilana B.</creator><creator>Ryerson, Thomas B.</creator><creator>Roberts, James M.</creator><creator>Warneke, Carsten</creator><creator>de Gouw, Joost A.</creator><creator>Trainer, Michael K.</creator><creator>Murphy, Daniel M.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7UA</scope><scope>7XB</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M2O</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>20121116</creationdate><title>Evolution of aerosol properties impacting visibility and direct climate forcing in an ammonia-rich urban environment</title><author>Langridge, Justin M. ; Lack, Daniel ; Brock, Charles A. ; Bahreini, Roya ; Middlebrook, Ann M. ; Neuman, J. Andrew ; Nowak, John B. ; Perring, Anne E. ; Schwarz, Joshua P. ; Spackman, J. 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Andrew</au><au>Nowak, John B.</au><au>Perring, Anne E.</au><au>Schwarz, Joshua P.</au><au>Spackman, J. Ryan</au><au>Holloway, John S.</au><au>Pollack, Ilana B.</au><au>Ryerson, Thomas B.</au><au>Roberts, James M.</au><au>Warneke, Carsten</au><au>de Gouw, Joost A.</au><au>Trainer, Michael K.</au><au>Murphy, Daniel M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evolution of aerosol properties impacting visibility and direct climate forcing in an ammonia-rich urban environment</atitle><jtitle>Journal of Geophysical Research: Atmospheres</jtitle><addtitle>J. Geophys. Res</addtitle><date>2012-11-16</date><risdate>2012</risdate><volume>117</volume><issue>D21</issue><epage>n/a</epage><issn>0148-0227</issn><issn>2169-897X</issn><eissn>2156-2202</eissn><eissn>2169-8996</eissn><abstract>Airborne measurements of sub‐micron aerosol and trace gases downwind of Los Angeles are used to investigate the influence of aging on aerosol properties relevant to climate forcing and visibility. The analysis focuses on the Los Angeles plume, which in addition to strong urban emissions is influenced by local agricultural emissions. Secondary organic aerosol formation and repartitioning of semi‐volatile ammonium nitrate were identified as key factors controlling the optical behavior observed. For one case study, ammonium nitrate contributed up to 50% of total dry extinction. At 85% relative humidity, extinction in the fresh plume was enhanced by a factor of ∼1.7, and 60–80% of this was from water associated with ammonium nitrate. On this day, loss of ammonium nitrate resulted in decreasing aerosol hygroscopicity with aging. Failing to account for loss of ammonium nitrate led to overestimation of the radiative cooling exerted by the most aged aerosol by ∼35% under dry conditions. These results show that changes to aerosol behavior with aging can impact visibility and climate forcing significantly. The importance of ammonium nitrate and water also highlight the need to improve the current representation of semi‐volatile aerosol species in large‐scale climate models.
Key Points
The visibility and climate impacts of aerosol change with aging
Ammonium nitrate formation/partitioning is important in the Los Angeles region</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2011JD017116</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of Geophysical Research: Atmospheres, 2012-11, Vol.117 (D21), p.n/a |
| issn | 0148-0227 2169-897X 2156-2202 2169-8996 |
| language | eng |
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| source | Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Alma/SFX Local Collection |
| subjects | aerosol aging aerosol optical properties Aerosols Aging Air pollution Ammonium Ammonium nitrate Applied sciences Atmospheric aerosols Atmospheric pollution Atmospheric sciences Climate models direct climate forcing Emissions Exact sciences and technology Geophysics Nitrates Pollutants physicochemistry study: properties, effects, reactions, transport and distribution Pollution Relative humidity Troposphere Urban environments Visibility |
| title | Evolution of aerosol properties impacting visibility and direct climate forcing in an ammonia-rich urban environment |
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