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Impact of satellite observed microwave SST on the simulation of tropical cyclones

Author

Listed:
  • Vishal Bongirwar
  • V. Rakesh
  • C. Kishtawal
  • P. Joshi

Abstract

The impact of realistic representation of sea surface temperature (SST) on the numerical simulation of track and intensity of tropical cyclones formed over the north Indian Ocean is studied using the Weather Research and Forecast (WRF) model. We have selected two intense tropical cyclones formed over the Bay of Bengal for studying the SST impact. Two different sets of SSTs were used in this study: one from TRMM Microwave Imager (TMI) satellite and other is the weekly averaged Reynold’s SST analysis from National Center for Environmental Prediction (NCEP). WRF simulations were conducted using the Reynold’s and TMI SST as model boundary condition for the two cyclone cases selected. The TMI SST which has a better temporal and spatial resolution showed sharper gradient when compared to the Reynold’s SST. The use of TMI SST improved the WRF cyclone intensity prediction when compared to that using Reynold’s SST for both the cases studied. The improvements in intensity were mainly due to the improved prediction of surface latent and sensible heat fluxes. The use of TMI SST in place of Reynold’s SST improved cyclone track prediction for Orissa super cyclone but slightly degraded track prediction for cyclone Mala. The present modeling study supports the well established notion that the horizontal SST gradient is one of the major driving forces for the intensification and movement of tropical cyclones over the Indian Ocean. Copyright Springer Science+Business Media B.V. 2011

Suggested Citation

  • Vishal Bongirwar & V. Rakesh & C. Kishtawal & P. Joshi, 2011. "Impact of satellite observed microwave SST on the simulation of tropical cyclones," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 58(3), pages 929-944, September.
    • Handle: RePEc:spr:nathaz:v:58:y:2011:i:3:p:929-944
    DOI: 10.1007/s11069-010-9699-y
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    Cited by:

    1. Praveen Kumar Pothapakula & Krishna K. Osuri & Sujata Pattanayak & U. C. Mohanty & Sourav Sil & Raghu Nadimpalli, 2017. "Observational perspective of SST changes during life cycle of tropical cyclones over Bay of Bengal," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 88(3), pages 1769-1787, September.
    2. Tanvir Islam & Prashant Srivastava & Miguel Rico-Ramirez & Qiang Dai & Manika Gupta & Sudhir Singh, 2015. "Tracking a tropical cyclone through WRF–ARW simulation and sensitivity of model physics," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 76(3), pages 1473-1495, April.

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