Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws
Cloud flare-ups along the inner eye wall of a hurricane lead to enhancement of cloud scale divergence, which in turn leads to a large local enhancement of the departure from balance laws and can lead to local supergradient winds. This scenario is tested using the results from a mesoscale microphysic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Stockholm University Press
2012-05-01
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| Series: | Tellus: Series A, Dynamic Meteorology and Oceanography |
| Subjects: | |
| Online Access: | http://www.tellusa.net/index.php/tellusa/article/view/18399/pdf_2 |
| _version_ | 1818038418320392192 |
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| author | T. N. Krishnamurti Anu Simon Mrinal Kanti Biswas Christopher Davis |
| author_facet | T. N. Krishnamurti Anu Simon Mrinal Kanti Biswas Christopher Davis |
| author_sort | T. N. Krishnamurti |
| collection | DOAJ |
| description | Cloud flare-ups along the inner eye wall of a hurricane lead to enhancement of cloud scale divergence, which in turn leads to a large local enhancement of the departure from balance laws and can lead to local supergradient winds. This scenario is tested using the results from a mesoscale microphysical model at horizontal resolution of 1.33 km for the simulation of hurricane Katrina. Rainwater mixing ratio tags growing cloud elements. The departure from balance laws includes terms such as the local, horizontal and vertical advections of divergence, divergence square and a term invoking the gradient of vertical velocity. It is noted that these terms collectively contribute to a substantial local enhancement of the departure from balance laws. Departures from balance laws are related to the radial gradient wind imbalances in a storm-centred coordinate. In this study, several examples, from the hurricane Katrina simulations, that display this scenario of rapid intensification are illustrated. Organisation of convection in the azimuthal direction seems important for the hurricane scale; cloud flare-ups away from such regions of azimuthal organisation fail to contribute to this scenario for the overall intensification of the hurricane. |
| first_indexed | 2024-12-10T07:42:25Z |
| format | Article |
| id | doaj.art-850a8d0d45bd41948f70be16dba62b99 |
| institution | Directory Open Access Journal |
| issn | 0280-6495 1600-0870 |
| language | English |
| last_indexed | 2024-12-10T07:42:25Z |
| publishDate | 2012-05-01 |
| publisher | Stockholm University Press |
| record_format | Article |
| series | Tellus: Series A, Dynamic Meteorology and Oceanography |
| spelling | doaj.art-850a8d0d45bd41948f70be16dba62b992022-12-22T01:57:16ZengStockholm University PressTellus: Series A, Dynamic Meteorology and Oceanography0280-64951600-08702012-05-0164012410.3402/tellusa.v64i0.18399Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance lawsT. N. KrishnamurtiAnu SimonMrinal Kanti BiswasChristopher DavisCloud flare-ups along the inner eye wall of a hurricane lead to enhancement of cloud scale divergence, which in turn leads to a large local enhancement of the departure from balance laws and can lead to local supergradient winds. This scenario is tested using the results from a mesoscale microphysical model at horizontal resolution of 1.33 km for the simulation of hurricane Katrina. Rainwater mixing ratio tags growing cloud elements. The departure from balance laws includes terms such as the local, horizontal and vertical advections of divergence, divergence square and a term invoking the gradient of vertical velocity. It is noted that these terms collectively contribute to a substantial local enhancement of the departure from balance laws. Departures from balance laws are related to the radial gradient wind imbalances in a storm-centred coordinate. In this study, several examples, from the hurricane Katrina simulations, that display this scenario of rapid intensification are illustrated. Organisation of convection in the azimuthal direction seems important for the hurricane scale; cloud flare-ups away from such regions of azimuthal organisation fail to contribute to this scenario for the overall intensification of the hurricane.http://www.tellusa.net/index.php/tellusa/article/view/18399/pdf_2hurricane intensityhurricane modellingclouds within hurricanesflights in hurricaneshurricane dynamicsinner core hurricane |
| spellingShingle | T. N. Krishnamurti Anu Simon Mrinal Kanti Biswas Christopher Davis Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws Tellus: Series A, Dynamic Meteorology and Oceanography hurricane intensity hurricane modelling clouds within hurricanes flights in hurricanes hurricane dynamics inner core hurricane |
| title | Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws |
| title_full | Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws |
| title_fullStr | Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws |
| title_full_unstemmed | Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws |
| title_short | Impacts of cloud flare-ups on hurricane intensity resulting from departures from balance laws |
| title_sort | impacts of cloud flare ups on hurricane intensity resulting from departures from balance laws |
| topic | hurricane intensity hurricane modelling clouds within hurricanes flights in hurricanes hurricane dynamics inner core hurricane |
| url | http://www.tellusa.net/index.php/tellusa/article/view/18399/pdf_2 |
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