A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai
A multi-year (2004–2008) study of horizontal visibility and factors controlling its variations was conducted in Shanghai. The seasonal average visibility in spring, summer, autumn, and winter was 7.7 km, 8.4 km, 8.1 km, and 6.5 km, respectively, significantly exceeding the haze criteria of 10 km thr...
Gespeichert in:
| Veröffentlicht in: | Atmospheric environment (1994) 2014-08, Vol.92, p.76-86 |
|---|---|
| Hauptverfasser: | , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 86 |
|---|---|
| container_issue | |
| container_start_page | 76 |
| container_title | Atmospheric environment (1994) |
| container_volume | 92 |
| creator | Lin, Yanfen Huang, Kan Zhuang, Guoshun Fu, Joshua S. Wang, Qiongzhen Liu, Tingna Deng, Congrui Fu, Qingyan |
| description | A multi-year (2004–2008) study of horizontal visibility and factors controlling its variations was conducted in Shanghai. The seasonal average visibility in spring, summer, autumn, and winter was 7.7 km, 8.4 km, 8.1 km, and 6.5 km, respectively, significantly exceeding the haze criteria of 10 km throughout all four seasons. Although SO2 and NO2 concentrations gradually shifted to lower levels on an annual basis, no distinct improvement of the annual mean visibility was noticed. Via a grouping method, it was found that the water soluble ions and black carbon were the major contributors to haze formation while the role of mineral aerosol was negligible. Of the ions, SO42−, NO3−, NH4+, K+, and C2O42− were most associated with the formation of heavy haze. SO42− and NO3− were both found to have significant decreasing trends with annual decreasing rates of 0.96 and 0.56 μg/m3/yr, respectively. Conversely, NH4+ showed a significant increasing trend with the annual increasing rate of 0.52 μg/m3/yr. Based on a quantitative correlation analysis, the roles of NH4+ and Ca2+ on the acids neutralization were almost equivalent in the earlier years of 2004–2005. While the role of Ca2+ had tremendously dropped to less than 23% in the later years of 2006–2008. Intense control measures on the emissions of construction works and roadside dust were the main driving force for the evident decreasing trend of annual Ca2+ concentrations. This study found that the gradual replacement of CaSO4 and Ca(NO3)2 by (NH4)2SO4 and NH4NO3 in aerosol was the major cause of no improvement of the visibility impairment in Shanghai during recent years.
•Visibility and haze frequency were not improved in Shanghai during 2004–2008.•Haze caused by secondary inorganic pollution induced the lowest visibility.•CaSO4 and Ca(NO3)2 in aerosol were gradually replaced by (NH4)2SO4 and NH4NO3.•Evolution of aerosol chemical species caused negligible improvement of visibility. |
| doi_str_mv | 10.1016/j.atmosenv.2014.04.007 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1919953706</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S1352231014002799</els_id><sourcerecordid>1919953706</sourcerecordid><originalsourceid>FETCH-LOGICAL-c408t-e7df6166507b7e10ac8e1246eec5ac364c3cec08a5156b1b1fefd3cfabfc84f93</originalsourceid><addsrcrecordid>eNqFkU2L3DAMhkNpodtt_0LxpdBDM7XjxE5uHZbtByz00PZsFEWe8ZDYU9sTmO2fr5fZ9rogkBDPKyG9VfVW8I3gQn08bCAvIZFfNw0X7YaX4PpZdSV6Leumb9vnpZZdUzdS8JfVq5QOnHOpB31V_dmy5TRnV58JIqM1zKfsgmfBMqAYUpgZ7mlxKcczc8sRMDu_Y6tLbnSzy2cGfmJ7uCdmQ1zgIl4plj67hZQperZNDthCO8Ai-MB-7MHv9uBeVy8szInePObr6tfn2583X-u771--3Wzvamx5n2vSk1VCqY7rUZPggD2JplVE2AFK1aJEQt5DJzo1ilFYspNEC6PFvrWDvK7eX-YeY_h9opRNuQdpnsFTOCUjBjEMndRcPY2qRg9dy1tRUHVBsbwpRbLmGN0C8WwENw_GmIP5Z4x5MMbwElwX4bvHHZAQZhvBo0v_1U3f9VI2XeE-XTgqv1kdRZPQkUeaXCTMZgruqVV_ATSqqmg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1627954041</pqid></control><display><type>article</type><title>A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Lin, Yanfen ; Huang, Kan ; Zhuang, Guoshun ; Fu, Joshua S. ; Wang, Qiongzhen ; Liu, Tingna ; Deng, Congrui ; Fu, Qingyan</creator><creatorcontrib>Lin, Yanfen ; Huang, Kan ; Zhuang, Guoshun ; Fu, Joshua S. ; Wang, Qiongzhen ; Liu, Tingna ; Deng, Congrui ; Fu, Qingyan</creatorcontrib><description>A multi-year (2004–2008) study of horizontal visibility and factors controlling its variations was conducted in Shanghai. The seasonal average visibility in spring, summer, autumn, and winter was 7.7 km, 8.4 km, 8.1 km, and 6.5 km, respectively, significantly exceeding the haze criteria of 10 km throughout all four seasons. Although SO2 and NO2 concentrations gradually shifted to lower levels on an annual basis, no distinct improvement of the annual mean visibility was noticed. Via a grouping method, it was found that the water soluble ions and black carbon were the major contributors to haze formation while the role of mineral aerosol was negligible. Of the ions, SO42−, NO3−, NH4+, K+, and C2O42− were most associated with the formation of heavy haze. SO42− and NO3− were both found to have significant decreasing trends with annual decreasing rates of 0.96 and 0.56 μg/m3/yr, respectively. Conversely, NH4+ showed a significant increasing trend with the annual increasing rate of 0.52 μg/m3/yr. Based on a quantitative correlation analysis, the roles of NH4+ and Ca2+ on the acids neutralization were almost equivalent in the earlier years of 2004–2005. While the role of Ca2+ had tremendously dropped to less than 23% in the later years of 2006–2008. Intense control measures on the emissions of construction works and roadside dust were the main driving force for the evident decreasing trend of annual Ca2+ concentrations. This study found that the gradual replacement of CaSO4 and Ca(NO3)2 by (NH4)2SO4 and NH4NO3 in aerosol was the major cause of no improvement of the visibility impairment in Shanghai during recent years.
•Visibility and haze frequency were not improved in Shanghai during 2004–2008.•Haze caused by secondary inorganic pollution induced the lowest visibility.•CaSO4 and Ca(NO3)2 in aerosol were gradually replaced by (NH4)2SO4 and NH4NO3.•Evolution of aerosol chemical species caused negligible improvement of visibility.</description><identifier>ISSN: 1352-2310</identifier><identifier>EISSN: 1873-2844</identifier><identifier>DOI: 10.1016/j.atmosenv.2014.04.007</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Aerosol evolution ; Ammonium salts ; Applied sciences ; Atmospheric pollution ; Chemical species ; Exact sciences and technology ; Haze ; Pollutants physicochemistry study: properties, effects, reactions, transport and distribution ; Pollution ; Visibility trend</subject><ispartof>Atmospheric environment (1994), 2014-08, Vol.92, p.76-86</ispartof><rights>2014 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c408t-e7df6166507b7e10ac8e1246eec5ac364c3cec08a5156b1b1fefd3cfabfc84f93</citedby><cites>FETCH-LOGICAL-c408t-e7df6166507b7e10ac8e1246eec5ac364c3cec08a5156b1b1fefd3cfabfc84f93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.atmosenv.2014.04.007$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28583325$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, Yanfen</creatorcontrib><creatorcontrib>Huang, Kan</creatorcontrib><creatorcontrib>Zhuang, Guoshun</creatorcontrib><creatorcontrib>Fu, Joshua S.</creatorcontrib><creatorcontrib>Wang, Qiongzhen</creatorcontrib><creatorcontrib>Liu, Tingna</creatorcontrib><creatorcontrib>Deng, Congrui</creatorcontrib><creatorcontrib>Fu, Qingyan</creatorcontrib><title>A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai</title><title>Atmospheric environment (1994)</title><description>A multi-year (2004–2008) study of horizontal visibility and factors controlling its variations was conducted in Shanghai. The seasonal average visibility in spring, summer, autumn, and winter was 7.7 km, 8.4 km, 8.1 km, and 6.5 km, respectively, significantly exceeding the haze criteria of 10 km throughout all four seasons. Although SO2 and NO2 concentrations gradually shifted to lower levels on an annual basis, no distinct improvement of the annual mean visibility was noticed. Via a grouping method, it was found that the water soluble ions and black carbon were the major contributors to haze formation while the role of mineral aerosol was negligible. Of the ions, SO42−, NO3−, NH4+, K+, and C2O42− were most associated with the formation of heavy haze. SO42− and NO3− were both found to have significant decreasing trends with annual decreasing rates of 0.96 and 0.56 μg/m3/yr, respectively. Conversely, NH4+ showed a significant increasing trend with the annual increasing rate of 0.52 μg/m3/yr. Based on a quantitative correlation analysis, the roles of NH4+ and Ca2+ on the acids neutralization were almost equivalent in the earlier years of 2004–2005. While the role of Ca2+ had tremendously dropped to less than 23% in the later years of 2006–2008. Intense control measures on the emissions of construction works and roadside dust were the main driving force for the evident decreasing trend of annual Ca2+ concentrations. This study found that the gradual replacement of CaSO4 and Ca(NO3)2 by (NH4)2SO4 and NH4NO3 in aerosol was the major cause of no improvement of the visibility impairment in Shanghai during recent years.
•Visibility and haze frequency were not improved in Shanghai during 2004–2008.•Haze caused by secondary inorganic pollution induced the lowest visibility.•CaSO4 and Ca(NO3)2 in aerosol were gradually replaced by (NH4)2SO4 and NH4NO3.•Evolution of aerosol chemical species caused negligible improvement of visibility.</description><subject>Aerosol evolution</subject><subject>Ammonium salts</subject><subject>Applied sciences</subject><subject>Atmospheric pollution</subject><subject>Chemical species</subject><subject>Exact sciences and technology</subject><subject>Haze</subject><subject>Pollutants physicochemistry study: properties, effects, reactions, transport and distribution</subject><subject>Pollution</subject><subject>Visibility trend</subject><issn>1352-2310</issn><issn>1873-2844</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkU2L3DAMhkNpodtt_0LxpdBDM7XjxE5uHZbtByz00PZsFEWe8ZDYU9sTmO2fr5fZ9rogkBDPKyG9VfVW8I3gQn08bCAvIZFfNw0X7YaX4PpZdSV6Leumb9vnpZZdUzdS8JfVq5QOnHOpB31V_dmy5TRnV58JIqM1zKfsgmfBMqAYUpgZ7mlxKcczc8sRMDu_Y6tLbnSzy2cGfmJ7uCdmQ1zgIl4plj67hZQperZNDthCO8Ai-MB-7MHv9uBeVy8szInePObr6tfn2583X-u771--3Wzvamx5n2vSk1VCqY7rUZPggD2JplVE2AFK1aJEQt5DJzo1ilFYspNEC6PFvrWDvK7eX-YeY_h9opRNuQdpnsFTOCUjBjEMndRcPY2qRg9dy1tRUHVBsbwpRbLmGN0C8WwENw_GmIP5Z4x5MMbwElwX4bvHHZAQZhvBo0v_1U3f9VI2XeE-XTgqv1kdRZPQkUeaXCTMZgruqVV_ATSqqmg</recordid><startdate>20140801</startdate><enddate>20140801</enddate><creator>Lin, Yanfen</creator><creator>Huang, Kan</creator><creator>Zhuang, Guoshun</creator><creator>Fu, Joshua S.</creator><creator>Wang, Qiongzhen</creator><creator>Liu, Tingna</creator><creator>Deng, Congrui</creator><creator>Fu, Qingyan</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>C1K</scope><scope>KL.</scope><scope>SOI</scope><scope>7QH</scope><scope>7TN</scope><scope>7UA</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20140801</creationdate><title>A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai</title><author>Lin, Yanfen ; Huang, Kan ; Zhuang, Guoshun ; Fu, Joshua S. ; Wang, Qiongzhen ; Liu, Tingna ; Deng, Congrui ; Fu, Qingyan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c408t-e7df6166507b7e10ac8e1246eec5ac364c3cec08a5156b1b1fefd3cfabfc84f93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Aerosol evolution</topic><topic>Ammonium salts</topic><topic>Applied sciences</topic><topic>Atmospheric pollution</topic><topic>Chemical species</topic><topic>Exact sciences and technology</topic><topic>Haze</topic><topic>Pollutants physicochemistry study: properties, effects, reactions, transport and distribution</topic><topic>Pollution</topic><topic>Visibility trend</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, Yanfen</creatorcontrib><creatorcontrib>Huang, Kan</creatorcontrib><creatorcontrib>Zhuang, Guoshun</creatorcontrib><creatorcontrib>Fu, Joshua S.</creatorcontrib><creatorcontrib>Wang, Qiongzhen</creatorcontrib><creatorcontrib>Liu, Tingna</creatorcontrib><creatorcontrib>Deng, Congrui</creatorcontrib><creatorcontrib>Fu, Qingyan</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Environment Abstracts</collection><collection>Aqualine</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Atmospheric environment (1994)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, Yanfen</au><au>Huang, Kan</au><au>Zhuang, Guoshun</au><au>Fu, Joshua S.</au><au>Wang, Qiongzhen</au><au>Liu, Tingna</au><au>Deng, Congrui</au><au>Fu, Qingyan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai</atitle><jtitle>Atmospheric environment (1994)</jtitle><date>2014-08-01</date><risdate>2014</risdate><volume>92</volume><spage>76</spage><epage>86</epage><pages>76-86</pages><issn>1352-2310</issn><eissn>1873-2844</eissn><abstract>A multi-year (2004–2008) study of horizontal visibility and factors controlling its variations was conducted in Shanghai. The seasonal average visibility in spring, summer, autumn, and winter was 7.7 km, 8.4 km, 8.1 km, and 6.5 km, respectively, significantly exceeding the haze criteria of 10 km throughout all four seasons. Although SO2 and NO2 concentrations gradually shifted to lower levels on an annual basis, no distinct improvement of the annual mean visibility was noticed. Via a grouping method, it was found that the water soluble ions and black carbon were the major contributors to haze formation while the role of mineral aerosol was negligible. Of the ions, SO42−, NO3−, NH4+, K+, and C2O42− were most associated with the formation of heavy haze. SO42− and NO3− were both found to have significant decreasing trends with annual decreasing rates of 0.96 and 0.56 μg/m3/yr, respectively. Conversely, NH4+ showed a significant increasing trend with the annual increasing rate of 0.52 μg/m3/yr. Based on a quantitative correlation analysis, the roles of NH4+ and Ca2+ on the acids neutralization were almost equivalent in the earlier years of 2004–2005. While the role of Ca2+ had tremendously dropped to less than 23% in the later years of 2006–2008. Intense control measures on the emissions of construction works and roadside dust were the main driving force for the evident decreasing trend of annual Ca2+ concentrations. This study found that the gradual replacement of CaSO4 and Ca(NO3)2 by (NH4)2SO4 and NH4NO3 in aerosol was the major cause of no improvement of the visibility impairment in Shanghai during recent years.
•Visibility and haze frequency were not improved in Shanghai during 2004–2008.•Haze caused by secondary inorganic pollution induced the lowest visibility.•CaSO4 and Ca(NO3)2 in aerosol were gradually replaced by (NH4)2SO4 and NH4NO3.•Evolution of aerosol chemical species caused negligible improvement of visibility.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.atmosenv.2014.04.007</doi><tpages>11</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1352-2310 |
| ispartof | Atmospheric environment (1994), 2014-08, Vol.92, p.76-86 |
| issn | 1352-2310 1873-2844 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1919953706 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Aerosol evolution Ammonium salts Applied sciences Atmospheric pollution Chemical species Exact sciences and technology Haze Pollutants physicochemistry study: properties, effects, reactions, transport and distribution Pollution Visibility trend |
| title | A multi-year evolution of aerosol chemistry impacting visibility and haze formation over an Eastern Asia megacity, Shanghai |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-05T17%3A21%3A57IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20multi-year%20evolution%20of%20aerosol%20chemistry%20impacting%20visibility%20and%20haze%20formation%20over%20an%20Eastern%20Asia%20megacity,%20Shanghai&rft.jtitle=Atmospheric%20environment%20(1994)&rft.au=Lin,%20Yanfen&rft.date=2014-08-01&rft.volume=92&rft.spage=76&rft.epage=86&rft.pages=76-86&rft.issn=1352-2310&rft.eissn=1873-2844&rft_id=info:doi/10.1016/j.atmosenv.2014.04.007&rft_dat=%3Cproquest_cross%3E1919953706%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1627954041&rft_id=info:pmid/&rft_els_id=S1352231014002799&rfr_iscdi=true |