Revisiting trough interactions and tropical cyclone intensity change
Abstract An updated climatology of Atlantic basin tropical cyclone (TC) intensity change in the presence of upper tropospheric trough forcing is presented. To control for changes in the background thermodynamic environment, a methodology that normalizes intensity change by the potential intensity of...
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069040 |
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| author | C. M. Peirano K. L. Corbosiero B. H. Tang |
| author_facet | C. M. Peirano K. L. Corbosiero B. H. Tang |
| author_sort | C. M. Peirano |
| collection | DOAJ |
| description | Abstract An updated climatology of Atlantic basin tropical cyclone (TC) intensity change in the presence of upper tropospheric trough forcing is presented. To control for changes in the background thermodynamic environment, a methodology that normalizes intensity change by the potential intensity of the TC is used to more narrowly focus on the effect of troughs compared to previous studies. Relative to the full sample of Atlantic TCs, troughs are a negative influence on intensification: trough interaction cases are 4% less likely to intensify and 5% more likely to weaken. Troughs are especially detrimental compared to TCs without trough forcing: trough interaction cases are 14% less likely to intensify and 13% more likely to weaken. Additionally, eddy flux convergence of angular momentum, previously shown to positively affect TC intensity change, is shown to be a weak predictor of intensity change compared to vertical wind shear, which is enhanced during a trough interaction. |
| format | Article |
| id | doaj-art-10a6a7d4a71248eeaff25c5a0e92a893 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-10a6a7d4a71248eeaff25c5a0e92a8932025-08-20T02:31:41ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143105509551510.1002/2016GL069040Revisiting trough interactions and tropical cyclone intensity changeC. M. Peirano0K. L. Corbosiero1B. H. Tang2Department of Atmospheric and Environmental Sciences SUNY‐University at Albany Albany New York USADepartment of Atmospheric and Environmental Sciences SUNY‐University at Albany Albany New York USADepartment of Atmospheric and Environmental Sciences SUNY‐University at Albany Albany New York USAAbstract An updated climatology of Atlantic basin tropical cyclone (TC) intensity change in the presence of upper tropospheric trough forcing is presented. To control for changes in the background thermodynamic environment, a methodology that normalizes intensity change by the potential intensity of the TC is used to more narrowly focus on the effect of troughs compared to previous studies. Relative to the full sample of Atlantic TCs, troughs are a negative influence on intensification: trough interaction cases are 4% less likely to intensify and 5% more likely to weaken. Troughs are especially detrimental compared to TCs without trough forcing: trough interaction cases are 14% less likely to intensify and 13% more likely to weaken. Additionally, eddy flux convergence of angular momentum, previously shown to positively affect TC intensity change, is shown to be a weak predictor of intensity change compared to vertical wind shear, which is enhanced during a trough interaction.https://doi.org/10.1002/2016GL069040tropical cyclonehurricanetroughintensityinteraction |
| spellingShingle | C. M. Peirano K. L. Corbosiero B. H. Tang Revisiting trough interactions and tropical cyclone intensity change Geophysical Research Letters tropical cyclone hurricane trough intensity interaction |
| title | Revisiting trough interactions and tropical cyclone intensity change |
| title_full | Revisiting trough interactions and tropical cyclone intensity change |
| title_fullStr | Revisiting trough interactions and tropical cyclone intensity change |
| title_full_unstemmed | Revisiting trough interactions and tropical cyclone intensity change |
| title_short | Revisiting trough interactions and tropical cyclone intensity change |
| title_sort | revisiting trough interactions and tropical cyclone intensity change |
| topic | tropical cyclone hurricane trough intensity interaction |
| url | https://doi.org/10.1002/2016GL069040 |
| work_keys_str_mv | AT cmpeirano revisitingtroughinteractionsandtropicalcycloneintensitychange AT klcorbosiero revisitingtroughinteractionsandtropicalcycloneintensitychange AT bhtang revisitingtroughinteractionsandtropicalcycloneintensitychange |