Ocean Systems Engineering

  • 제10권2호
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  • Pages.181-199
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  • 2020
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Seasonal variability of cyclone heat potential and cyclonic responses in the Bay of Bengal characterized using moored observatories

  • Vengatesan, G. (National Institute of Ocean Technology, Ministry of Earth Sciences) ;
  • Shanmugam, P. (Indian Institute of Technology) ;
  • Venkatesan, R. (National Institute of Ocean Technology, Ministry of Earth Sciences) ;
  • Vedachalam, N. (National Institute of Ocean Technology, Ministry of Earth Sciences) ;
  • Joseph, Jossia K. (National Institute of Ocean Technology, Ministry of Earth Sciences)
  • 투고 : 2019.03.12
  • 심사 : 2019.12.30
  • 발행 : 2020.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Cyclone Heat Potential (CHP) is an essential parameter for accurate prediction of the intensity of tropical cyclones. The variability of the heat storage in the near-surface layers and the vertical stratification near the surface due to large fresh water inputs create challenges in predicting the intraseasonal and interannual evolution of monsoons and tropical cyclones in the Bay of Bengal. This paper for the first time presents the D26- referenced cyclone heat potential observed in the Bay of Bengal during the period 2012-17 based on the in-situ data collected from 5.5 million demanding offshore instrument-hours of operation in the Ocean Moored Buoy Network for Northern Indian Ocean (OMNI) buoy network by the National Institute of Ocean Technology. It is observed that the CHP in the Bay of Bengal varied from 0-220 kJ/㎠ during various seasons. From the moored buoy observations, a CHP of ~ 90 kJ/㎠ with the D26 isotherm of minimum 100m is favorable for the intensification of the post-monsoon tropical cyclones. The responses of the D26 thermal structure during major tropical cyclone events in the Bay of Bengal are also presented.

키워드

과제정보

We thank the Ministry of Earth Sciences (MoES), Govt. of India for funding this project. We are indebted to the Directors of NIOT, Chennai, NCAOR, Goa and INCOIS, Hyderabad for providing all the facilities and logistic support. We also thank the staff of Ocean Observation Systems (OOS) group, Vessel Management Cell of the NIOT and ship staff for their excellent help and support on board.

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