Coupled infrared extinction and size distribution measurements for several clay components of mineral dust aerosol
Simultaneous size distributions and Fourier transform infrared extinction spectra have been measured for several clay components of mineral dust aerosol (illite, kaolinite, and montmorillonite) in the fine particle–sized mode (D = 0.1–1 μm). Published optical constants have been used in combination...
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| Veröffentlicht in: | Journal of Geophysical Research: Atmospheres 2008-01, Vol.113 (D1), p.n/a |
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| creator | Hudson, Paula K. Gibson, Elizabeth R. Young, Mark A. Kleiber, Paul D. Grassian, Vicki H. |
| description | Simultaneous size distributions and Fourier transform infrared extinction spectra have been measured for several clay components of mineral dust aerosol (illite, kaolinite, and montmorillonite) in the fine particle–sized mode (D = 0.1–1 μm). Published optical constants have been used in combination with the measured size distributions in spectral simulations for comparison to the measured extinction spectrum. In general, the Mie theory simulation does not accurately reproduce the peak position or band shape for the prominent Si—O stretch resonance near 9.5 μm (ca. 1050 cm−1) for any of the clays. The resonance peak in the Mie simulation is consistently blue shifted (27–44 cm−1) relative to the experimental spectrum. Additionally, the integrated absorbance in the resonance band is underpredicted for all three clay compounds. Spectral simulations based on various distributions of ellipsoid‐shaped particles better reproduce the experimental spectrum including the peak position, band shape, and integrated absorbance for these fine clay aerosols. |
| doi_str_mv | 10.1029/2007JD008791 |
| format | Article |
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Published optical constants have been used in combination with the measured size distributions in spectral simulations for comparison to the measured extinction spectrum. In general, the Mie theory simulation does not accurately reproduce the peak position or band shape for the prominent Si—O stretch resonance near 9.5 μm (ca. 1050 cm−1) for any of the clays. The resonance peak in the Mie simulation is consistently blue shifted (27–44 cm−1) relative to the experimental spectrum. Additionally, the integrated absorbance in the resonance band is underpredicted for all three clay compounds. 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Geophys. Res</addtitle><description>Simultaneous size distributions and Fourier transform infrared extinction spectra have been measured for several clay components of mineral dust aerosol (illite, kaolinite, and montmorillonite) in the fine particle–sized mode (D = 0.1–1 μm). Published optical constants have been used in combination with the measured size distributions in spectral simulations for comparison to the measured extinction spectrum. In general, the Mie theory simulation does not accurately reproduce the peak position or band shape for the prominent Si—O stretch resonance near 9.5 μm (ca. 1050 cm−1) for any of the clays. The resonance peak in the Mie simulation is consistently blue shifted (27–44 cm−1) relative to the experimental spectrum. Additionally, the integrated absorbance in the resonance band is underpredicted for all three clay compounds. Spectral simulations based on various distributions of ellipsoid‐shaped particles better reproduce the experimental spectrum including the peak position, band shape, and integrated absorbance for these fine clay aerosols.</description><subject>Absorbance</subject><subject>Aerosols</subject><subject>Clay (material)</subject><subject>Dust</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Extinction</subject><subject>infrared extinction</subject><subject>mineral dust aerosol</subject><subject>Particle size distribution</subject><subject>remote sensing</subject><subject>Simulation</subject><subject>Spectra</subject><issn>0148-0227</issn><issn>2169-897X</issn><issn>2156-2202</issn><issn>2169-8996</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNqNks1uEzEUhUcIJKK2Ox7AGxALBu71jO3xEqUQiCoQf-rScjzXkmF-gj0DDU9fJ6kqVlW8sC37O9_i6hTFM4TXCFy_4QBqfQnQKI2PigVHIUvOgT8uFoB1UwLn6mlxkdJPyKsWsgZcFHE5ztuOWhYGH23MF7qZwuCmMA7MDi1L4R-xNqQphs18eO3JpjlST8OUmB8jS_SHou2Y6-yOubHfjsPhb_SsD8Phq53TxCzFMY3defHE2y7Rxd15Vvx4_-778kN59Xn1cfn2qnSyrkSptHZOk5Dka3Ia89b6xltEUiCFaltBSFa0G_C-3qi2EbiRlfOIuvEeqrPixdG7jePvmdJk-pAcdZ0daJyT4SC0bjieBOaJnWSUqMTe-PJBEFUFoJUGeRraNKDhNFQAoM7oqyPq8shTJG-2MfQ27gyC2dfF_F-XjD-_M9vkbJebMLiQ7jOZlULLvbY6cn9DR7sHnWa9-nqJNXCRU-UxlVtEN_cpG38ZqSolzPWnlblG9eVb3axNXd0CxSvdbQ</recordid><startdate>20080116</startdate><enddate>20080116</enddate><creator>Hudson, Paula K.</creator><creator>Gibson, Elizabeth R.</creator><creator>Young, Mark A.</creator><creator>Kleiber, Paul D.</creator><creator>Grassian, Vicki H.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>7TG</scope><scope>7TV</scope><scope>C1K</scope><scope>KL.</scope></search><sort><creationdate>20080116</creationdate><title>Coupled infrared extinction and size distribution measurements for several clay components of mineral dust aerosol</title><author>Hudson, Paula K. ; Gibson, Elizabeth R. ; Young, Mark A. ; Kleiber, Paul D. ; Grassian, Vicki H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c6435-799cc9e56ef4ec914ecdf8fa11e70657dd5e1ea5db0ff4b7d851b63cf1198ff03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Absorbance</topic><topic>Aerosols</topic><topic>Clay (material)</topic><topic>Dust</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Extinction</topic><topic>infrared extinction</topic><topic>mineral dust aerosol</topic><topic>Particle size distribution</topic><topic>remote sensing</topic><topic>Simulation</topic><topic>Spectra</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hudson, Paula K.</creatorcontrib><creatorcontrib>Gibson, Elizabeth R.</creatorcontrib><creatorcontrib>Young, Mark A.</creatorcontrib><creatorcontrib>Kleiber, Paul D.</creatorcontrib><creatorcontrib>Grassian, Vicki H.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Pollution Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Journal of Geophysical Research: Atmospheres</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hudson, Paula K.</au><au>Gibson, Elizabeth R.</au><au>Young, Mark A.</au><au>Kleiber, Paul D.</au><au>Grassian, Vicki H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Coupled infrared extinction and size distribution measurements for several clay components of mineral dust aerosol</atitle><jtitle>Journal of Geophysical Research: Atmospheres</jtitle><addtitle>J. Geophys. Res</addtitle><date>2008-01-16</date><risdate>2008</risdate><volume>113</volume><issue>D1</issue><epage>n/a</epage><issn>0148-0227</issn><issn>2169-897X</issn><eissn>2156-2202</eissn><eissn>2169-8996</eissn><abstract>Simultaneous size distributions and Fourier transform infrared extinction spectra have been measured for several clay components of mineral dust aerosol (illite, kaolinite, and montmorillonite) in the fine particle–sized mode (D = 0.1–1 μm). Published optical constants have been used in combination with the measured size distributions in spectral simulations for comparison to the measured extinction spectrum. In general, the Mie theory simulation does not accurately reproduce the peak position or band shape for the prominent Si—O stretch resonance near 9.5 μm (ca. 1050 cm−1) for any of the clays. The resonance peak in the Mie simulation is consistently blue shifted (27–44 cm−1) relative to the experimental spectrum. Additionally, the integrated absorbance in the resonance band is underpredicted for all three clay compounds. Spectral simulations based on various distributions of ellipsoid‐shaped particles better reproduce the experimental spectrum including the peak position, band shape, and integrated absorbance for these fine clay aerosols.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2007JD008791</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Free Content; Wiley-Blackwell AGU Digital Library; Alma/SFX Local Collection |
| subjects | Absorbance Aerosols Clay (material) Dust Earth sciences Earth, ocean, space Exact sciences and technology Extinction infrared extinction mineral dust aerosol Particle size distribution remote sensing Simulation Spectra |
| title | Coupled infrared extinction and size distribution measurements for several clay components of mineral dust aerosol |
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