Tangential winds of a vortex system in a planetary surface layer

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dc.contributor.author Uttam, Shefali
dc.contributor.author Singh, Deepak
dc.contributor.author Sheel, Varun
dc.date.accessioned 2020-02-22T06:10:42Z
dc.date.available 2020-02-22T06:10:42Z
dc.date.issued 2020-12
dc.identifier.citation Uttam, Shefali; Singh, Deepak and Sheel, Varun, "Tangential winds of a vortex system in a planetary surface layer", Journal of Earth System Science, DOI: 10.1007/s12040-019-1268-5, vol. 129, no. 1, Dec. 2020. en_US
dc.identifier.issn 0253-4126
dc.identifier.issn 0973-774X
dc.identifier.uri http://dx.doi.org/10.1007/s12040-019-1268-5
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5074
dc.description.abstract The planetary boundary layer (PBL) mediates interactions between the surface and free atmosphere. In Martian PBL, surface can force convective vortices leading to dust devils. We use the Navier�Stokes equations and the continuity equation to determine mean (with respect to time) tangential wind velocity in cylindrical co-ordinate system within the surface layer of a planetary atmosphere. We utilize Martian surface layer properties for theoretical derivation of our solution. However, our results remain valid for any planetary surface layer as long as all of our assumptions are valid. Our theoretical values of the tangential wind velocity lie well within the range of observed values. The derived equation represents the dependency of tangential velocity on both radial distances from the center of vortex, and the altitude. As we move further away from the vortex center, the effect of vortex becomes non-significant, and velocities start following the standard logarithmic profile. Due to dependency of tangential wind velocity on altitude, the tangential velocity increases as we move higher up in the vortex system. At 100 m altitude, for an order of magnitude increase in the radial distance, the mean tangential wind velocity drops by about a factor of 1.5 in magnitude.
dc.description.statementofresponsibility by Shefali Uttam, Deepak Singh and Varun Sheel
dc.format.extent vol. 129, no. 1
dc.language.iso en_US en_US
dc.publisher Indian Academy of Sciences en_US
dc.subject Atmosphere dynamics en_US
dc.subject Mars atmosphere en_US
dc.subject planetary dynamics en_US
dc.subject terrestrial planets en_US
dc.title Tangential winds of a vortex system in a planetary surface layer en_US
dc.type Article en_US
dc.relation.journal Journal of Earth System Science

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