Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06
The 2006 NASA-African Monsoon Multidisciplinary Analyses (NAMMA-06) field campaign examined a compact, low-level vortex embedded in the trough of an AEW between 9–12 September. The vortex triggered a squall line (SL) in southeastern Senegal in the early morning of 11 September and became Tropical De...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Geophysics |
| Online Access: | http://dx.doi.org/10.1155/2012/153256 |
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| _version_ | 1849703573454061568 |
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| author | J. W. Smith A. E. Reynolds A. S. Pratt S. Salack B. Klotz T. L. Battle D. Grant A. Diop T. Fall A. Gaye D. Robertson M. S. DeLonge S. Chan |
| author_facet | J. W. Smith A. E. Reynolds A. S. Pratt S. Salack B. Klotz T. L. Battle D. Grant A. Diop T. Fall A. Gaye D. Robertson M. S. DeLonge S. Chan |
| author_sort | J. W. Smith |
| collection | DOAJ |
| description | The 2006 NASA-African Monsoon Multidisciplinary Analyses (NAMMA-06) field campaign examined a compact, low-level vortex embedded in the trough of an AEW between 9–12 September. The vortex triggered a squall line (SL) in southeastern Senegal in the early morning of 11 September and became Tropical Depression 8 on 12 September. During this period, there was a Saharan Air Layer (SAL) outbreak in northwestern Senegal and adjacent Atlantic Ocean waters in the proximity of the SL. Increases in aerosol optical thicknesses in Mbour, Senegal, high dewpoint depressions observed in the Kawsara and Dakar rawinsondes, and model back-trajectories suggest the SAL exists. The close proximity of this and SL suggests interaction through dust entrainment and precipitation invigoration. |
| format | Article |
| id | doaj-art-1809ef04082e4c22981a114ea689edbf |
| institution | DOAJ |
| issn | 1687-885X 1687-8868 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Geophysics |
| spelling | doaj-art-1809ef04082e4c22981a114ea689edbf2025-08-20T03:17:13ZengWileyInternational Journal of Geophysics1687-885X1687-88682012-01-01201210.1155/2012/153256153256Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06J. W. Smith0A. E. Reynolds1A. S. Pratt2S. Salack3B. Klotz4T. L. Battle5D. Grant6A. Diop7T. Fall8A. Gaye9D. Robertson10M. S. DeLonge11S. Chan12Program in Atmospheric Sciences, Howard University, Washington, DC 20059, USANASA Goddard Space Flight Center, Greenbelt, MD 20771, USAEarth Resources Technology, Inc., Laurel, MD 20707, USALaboratory of Atmospheric Physics—Simeon Fongong, Cheikh Anta Diop University, Dakar, SenegalRosenstiel School of Marine and Atmospheric Science, Cooperative Institute for Marine and Atmospheric Science Studies, University of Miami, Miami, FL 33149, USAProgram in Atmospheric Sciences, Howard University, Washington, DC 20059, USAEnvironmental Protection Agency, Region 4, Atlanta, GA 30303, USALaboratory of Atmospheric Physics—Simeon Fongong, Cheikh Anta Diop University, Dakar, SenegalLaboratory of Atmospheric Physics—Simeon Fongong, Cheikh Anta Diop University, Dakar, SenegalLaboratory of Atmospheric Physics—Simeon Fongong, Cheikh Anta Diop University, Dakar, SenegalDepartment of Mechanical Engineering, Howard University, Washington, DC 20059, USADepartment of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, CA 94720, USADepartment of Environmental Sciences, University of Virginia, Charlottesville, VA 22903, USAThe 2006 NASA-African Monsoon Multidisciplinary Analyses (NAMMA-06) field campaign examined a compact, low-level vortex embedded in the trough of an AEW between 9–12 September. The vortex triggered a squall line (SL) in southeastern Senegal in the early morning of 11 September and became Tropical Depression 8 on 12 September. During this period, there was a Saharan Air Layer (SAL) outbreak in northwestern Senegal and adjacent Atlantic Ocean waters in the proximity of the SL. Increases in aerosol optical thicknesses in Mbour, Senegal, high dewpoint depressions observed in the Kawsara and Dakar rawinsondes, and model back-trajectories suggest the SAL exists. The close proximity of this and SL suggests interaction through dust entrainment and precipitation invigoration.http://dx.doi.org/10.1155/2012/153256 |
| spellingShingle | J. W. Smith A. E. Reynolds A. S. Pratt S. Salack B. Klotz T. L. Battle D. Grant A. Diop T. Fall A. Gaye D. Robertson M. S. DeLonge S. Chan Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 International Journal of Geophysics |
| title | Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 |
| title_full | Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 |
| title_fullStr | Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 |
| title_full_unstemmed | Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 |
| title_short | Observations of an 11 September Sahelian Squall Line and Saharan Air Layer Outbreak during NAMMA-06 |
| title_sort | observations of an 11 september sahelian squall line and saharan air layer outbreak during namma 06 |
| url | http://dx.doi.org/10.1155/2012/153256 |
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