SO 2 depletion in tropospheric volcanic plumes
Ground based remote sensing techniques are used to measure volcanic SO 2 fluxes in efforts to characterise volcanic activity. As these measurements are made several km from source there is the potential for in‐plume chemical transformation of SO 2 to sulphate aerosol (conversion rates are dependent...
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| Veröffentlicht in: | Geophysical research letters 2004-07, Vol.31 (13) |
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| container_title | Geophysical research letters |
| container_volume | 31 |
| creator | McGonigle, A. J. S. Delmelle, P. Oppenheimer, C. Tsanev, V. I. Delfosse, T. Williams‐Jones, G. Horton, K. Mather, T. A. |
| description | Ground based remote sensing techniques are used to measure volcanic SO
2
fluxes in efforts to characterise volcanic activity. As these measurements are made several km from source there is the potential for in‐plume chemical transformation of SO
2
to sulphate aerosol (conversion rates are dependent on meteorological conditions), complicating interpretation of observed SO
2
flux trends. In contrast to anthropogenic plumes, SO
2
lifetimes are poorly constrained for tropospheric volcanic plumes, where the few previous loss rate estimates vary widely (from ≪1 to >99% per hour). We report experiments conducted on the boundary layer plume of Masaya volcano, Nicaragua during the dry season. We found that SO
2
fluxes showed negligible variation with plume age or diurnal variations in temperature, relative humidity and insolation, providing confirmation that remote SO
2
flux measurements (typically of ≈500–2000 s old plumes) are reliable proxies for source emissions for ash free tropospheric plumes not emitted into cloud or fog. |
| doi_str_mv | 10.1029/2004GL019990 |
| format | Article |
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2
fluxes in efforts to characterise volcanic activity. As these measurements are made several km from source there is the potential for in‐plume chemical transformation of SO
2
to sulphate aerosol (conversion rates are dependent on meteorological conditions), complicating interpretation of observed SO
2
flux trends. In contrast to anthropogenic plumes, SO
2
lifetimes are poorly constrained for tropospheric volcanic plumes, where the few previous loss rate estimates vary widely (from ≪1 to >99% per hour). We report experiments conducted on the boundary layer plume of Masaya volcano, Nicaragua during the dry season. We found that SO
2
fluxes showed negligible variation with plume age or diurnal variations in temperature, relative humidity and insolation, providing confirmation that remote SO
2
flux measurements (typically of ≈500–2000 s old plumes) are reliable proxies for source emissions for ash free tropospheric plumes not emitted into cloud or fog.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2004GL019990</identifier><language>eng</language><ispartof>Geophysical research letters, 2004-07, Vol.31 (13)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c800-4bda36df67f90d20a2a9a86fea76369fa5764382d3c2508303b97c7a96acd5a73</citedby><cites>FETCH-LOGICAL-c800-4bda36df67f90d20a2a9a86fea76369fa5764382d3c2508303b97c7a96acd5a73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,27905,27906</link.rule.ids></links><search><creatorcontrib>McGonigle, A. J. S.</creatorcontrib><creatorcontrib>Delmelle, P.</creatorcontrib><creatorcontrib>Oppenheimer, C.</creatorcontrib><creatorcontrib>Tsanev, V. I.</creatorcontrib><creatorcontrib>Delfosse, T.</creatorcontrib><creatorcontrib>Williams‐Jones, G.</creatorcontrib><creatorcontrib>Horton, K.</creatorcontrib><creatorcontrib>Mather, T. A.</creatorcontrib><title>SO 2 depletion in tropospheric volcanic plumes</title><title>Geophysical research letters</title><description>Ground based remote sensing techniques are used to measure volcanic SO
2
fluxes in efforts to characterise volcanic activity. As these measurements are made several km from source there is the potential for in‐plume chemical transformation of SO
2
to sulphate aerosol (conversion rates are dependent on meteorological conditions), complicating interpretation of observed SO
2
flux trends. In contrast to anthropogenic plumes, SO
2
lifetimes are poorly constrained for tropospheric volcanic plumes, where the few previous loss rate estimates vary widely (from ≪1 to >99% per hour). We report experiments conducted on the boundary layer plume of Masaya volcano, Nicaragua during the dry season. We found that SO
2
fluxes showed negligible variation with plume age or diurnal variations in temperature, relative humidity and insolation, providing confirmation that remote SO
2
flux measurements (typically of ≈500–2000 s old plumes) are reliable proxies for source emissions for ash free tropospheric plumes not emitted into cloud or fog.</description><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNpNj8tOwzAURC0EEqGw4wP8AaRcP2LnLlEFBSlSF3Qf3fohgtLEsgsSf08QLFjNWc3MYexWwFqAxHsJoLcdCESEM1YJ1LpuAew5qwBwYWnNJbsq5R0AFChRsfXrjkvuQxrDaZgnPkz8lOc0l_QW8uD45zw6mhZI48cxlGt2EWks4eYvV2z_9LjfPNfdbvuyeehqt-zV-uBJGR-NjQheAklCak0MZI0yGKmxRqtWeuVkA-3y5IDWWUJDzjdk1Yrd_da6PJeSQ-xTHo6Uv3oB_Y9q_19VfQMJ5ET-</recordid><startdate>200407</startdate><enddate>200407</enddate><creator>McGonigle, A. J. S.</creator><creator>Delmelle, P.</creator><creator>Oppenheimer, C.</creator><creator>Tsanev, V. I.</creator><creator>Delfosse, T.</creator><creator>Williams‐Jones, G.</creator><creator>Horton, K.</creator><creator>Mather, T. A.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200407</creationdate><title>SO 2 depletion in tropospheric volcanic plumes</title><author>McGonigle, A. J. S. ; Delmelle, P. ; Oppenheimer, C. ; Tsanev, V. I. ; Delfosse, T. ; Williams‐Jones, G. ; Horton, K. ; Mather, T. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c800-4bda36df67f90d20a2a9a86fea76369fa5764382d3c2508303b97c7a96acd5a73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>McGonigle, A. J. S.</creatorcontrib><creatorcontrib>Delmelle, P.</creatorcontrib><creatorcontrib>Oppenheimer, C.</creatorcontrib><creatorcontrib>Tsanev, V. I.</creatorcontrib><creatorcontrib>Delfosse, T.</creatorcontrib><creatorcontrib>Williams‐Jones, G.</creatorcontrib><creatorcontrib>Horton, K.</creatorcontrib><creatorcontrib>Mather, T. A.</creatorcontrib><collection>CrossRef</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>McGonigle, A. J. S.</au><au>Delmelle, P.</au><au>Oppenheimer, C.</au><au>Tsanev, V. I.</au><au>Delfosse, T.</au><au>Williams‐Jones, G.</au><au>Horton, K.</au><au>Mather, T. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SO 2 depletion in tropospheric volcanic plumes</atitle><jtitle>Geophysical research letters</jtitle><date>2004-07</date><risdate>2004</risdate><volume>31</volume><issue>13</issue><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>Ground based remote sensing techniques are used to measure volcanic SO
2
fluxes in efforts to characterise volcanic activity. As these measurements are made several km from source there is the potential for in‐plume chemical transformation of SO
2
to sulphate aerosol (conversion rates are dependent on meteorological conditions), complicating interpretation of observed SO
2
flux trends. In contrast to anthropogenic plumes, SO
2
lifetimes are poorly constrained for tropospheric volcanic plumes, where the few previous loss rate estimates vary widely (from ≪1 to >99% per hour). We report experiments conducted on the boundary layer plume of Masaya volcano, Nicaragua during the dry season. We found that SO
2
fluxes showed negligible variation with plume age or diurnal variations in temperature, relative humidity and insolation, providing confirmation that remote SO
2
flux measurements (typically of ≈500–2000 s old plumes) are reliable proxies for source emissions for ash free tropospheric plumes not emitted into cloud or fog.</abstract><doi>10.1029/2004GL019990</doi></addata></record> |
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| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2004-07, Vol.31 (13) |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_crossref_primary_10_1029_2004GL019990 |
| source | Wiley Online Library Free Content; Wiley-Blackwell AGU Digital Archive; Wiley Online Library All Journals; EZB Electronic Journals Library |
| title | SO 2 depletion in tropospheric volcanic plumes |
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