MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols
The 16-year MISR monthly radiances are analyzed in this study, showing significant enhancements of anisotropic scattering at high latitudes after several major volcanic eruptions with injection heights greater than 14 km. The anomaly of deseasonalized radiance anisotropy between MISR’s DF and DA vie...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-11-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/10/12/1875 |
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| author | Dong L. Wu Tao Wang Tamás Várnai James A. Limbacher Ralph A. Kahn Ghassan Taha Jae N. Lee Jie Gong Tianle Yuan |
| author_facet | Dong L. Wu Tao Wang Tamás Várnai James A. Limbacher Ralph A. Kahn Ghassan Taha Jae N. Lee Jie Gong Tianle Yuan |
| author_sort | Dong L. Wu |
| collection | DOAJ |
| description | The 16-year MISR monthly radiances are analyzed in this study, showing significant enhancements of anisotropic scattering at high latitudes after several major volcanic eruptions with injection heights greater than 14 km. The anomaly of deseasonalized radiance anisotropy between MISR’s DF and DA views (70.5° forward and aft) is largest in the blue band with amplitudes amounting to 5–15% of the mean radiance. The anomalous radiance anisotropy is a manifestation of the stronger forward scattering of reflected sunlight due to the direct and indirect effects of stratospheric volcanic aerosols (SVAs). The perturbations of MISR radiance anisotropy from the Kasatochi (August 2008), Sarychev (June 2009), Nabro (June 2011) and Calbuco (April 2015) eruptions are consistent with the poleward transported SVAs observed by CALIOP and OMPS-LP. In a particular scene over the Arctic Ocean, the stratospheric aerosol mid-visible optical depth can reach as high as 0.2–0.5. The enhanced global forward scattering by SVAs has important implications for the shortwave radiation budget. |
| first_indexed | 2024-12-20T11:54:37Z |
| format | Article |
| id | doaj.art-f60af0d508064a5080edb3e69860b1d7 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-20T11:54:37Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-f60af0d508064a5080edb3e69860b1d72022-12-21T19:41:41ZengMDPI AGRemote Sensing2072-42922018-11-011012187510.3390/rs10121875rs10121875MISR Radiance Anomalies Induced by Stratospheric Volcanic AerosolsDong L. Wu0Tao Wang1Tamás Várnai2James A. Limbacher3Ralph A. Kahn4Ghassan Taha5Jae N. Lee6Jie Gong7Tianle Yuan8NASA Goddard Space Flight Center, Greenbelt, MD 20771, USAEarth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, USAJoint Center for Earth Systems Technology, University of Maryland, Baltimore County, MD 21250, USAScience Systems and Applications, Inc., Lanham, MD 20706, USANASA Goddard Space Flight Center, Greenbelt, MD 20771, USAUniversities Space Research Association, Columbia, MD 21046, USAJoint Center for Earth Systems Technology, University of Maryland, Baltimore County, MD 21250, USAUniversities Space Research Association, Columbia, MD 21046, USAEarth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, USAThe 16-year MISR monthly radiances are analyzed in this study, showing significant enhancements of anisotropic scattering at high latitudes after several major volcanic eruptions with injection heights greater than 14 km. The anomaly of deseasonalized radiance anisotropy between MISR’s DF and DA views (70.5° forward and aft) is largest in the blue band with amplitudes amounting to 5–15% of the mean radiance. The anomalous radiance anisotropy is a manifestation of the stronger forward scattering of reflected sunlight due to the direct and indirect effects of stratospheric volcanic aerosols (SVAs). The perturbations of MISR radiance anisotropy from the Kasatochi (August 2008), Sarychev (June 2009), Nabro (June 2011) and Calbuco (April 2015) eruptions are consistent with the poleward transported SVAs observed by CALIOP and OMPS-LP. In a particular scene over the Arctic Ocean, the stratospheric aerosol mid-visible optical depth can reach as high as 0.2–0.5. The enhanced global forward scattering by SVAs has important implications for the shortwave radiation budget.https://www.mdpi.com/2072-4292/10/12/1875radiance anisotropyvolcanic aerosol direct and indirect effectsshortwave radiation |
| spellingShingle | Dong L. Wu Tao Wang Tamás Várnai James A. Limbacher Ralph A. Kahn Ghassan Taha Jae N. Lee Jie Gong Tianle Yuan MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols Remote Sensing radiance anisotropy volcanic aerosol direct and indirect effects shortwave radiation |
| title | MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols |
| title_full | MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols |
| title_fullStr | MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols |
| title_full_unstemmed | MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols |
| title_short | MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols |
| title_sort | misr radiance anomalies induced by stratospheric volcanic aerosols |
| topic | radiance anisotropy volcanic aerosol direct and indirect effects shortwave radiation |
| url | https://www.mdpi.com/2072-4292/10/12/1875 |
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