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Science & Tech.
Pradeep Kumar

10/06/21 11:00 AM IST

Novel technique could help detect tropical cyclones

In news

Indian Scientists have found a promising technique for early detection of development or strengthening of tropical cyclones in the atmospheric column prior to satellite detection over ocean surface in North Indian Ocean region.

Previous Detection Method
  • Early detection of Tropical cyclones has wide socio-economic implications.
  • So far, remote sensing techniques have detected them the earliest.
  • However, this detection was possible only after system developed as a well-marked low-pressure system over the warm ocean surface.
  • A larger time gap between the detection and the impact of the cyclone could help preparation activities.
New Technique
  • A novel method using Eddy detection technique to investigate the formative stages and advance detection time of tropical cyclogenesis in the North Indian Ocean region.
  • The method developed by the scientists’ aims to identify initial traces of pre-cyclonic eddy vortices in the atmospheric column and track its Spatio-temporal evolution.
  • They used coarser grid resolution of 27 km for identification and finer resolution of 9 km to evaluate the characteristics of eddy vortices. The study was conducted with cases of four post-monsoon severe cyclones –Phailin (2013), Vardah (2013), Gaja (2018), Madi (2013), and two pre-monsoon cyclones Mora (2017) and Aila (2009) that developed over North Indian Ocean.
  • The team observed that the method could bring about genesis of prediction with a minimum of four days (~ 90 h) lead time for cyclones developed during the pre-and post-monsoon seasons.
Source: PIB

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