DMPQ-What are marine Heatwaves ? Explain their causes and impact on Indian Subcontinent .

Marine heatwaves are periods of extremely high temperatures in the ocean.  This phenomenon causes ocean temperatures to be extremely warm for an extended period that can have significant impacts on marine ecosystems and industries.​  These can occur in summer or winter.

The most common drivers of marine heatwaves include:

  • Ocean currents can build up areas of warm water.
  • Air-sea heat flux or warming through the ocean surface from the atmosphere.
  • Winds can enhance or suppress the warming in a marine heatwave, and climate phenomena like El Niño can change the likelihood of events occurring in certain regions.

Marine heatwaves affect ecosystem structure, by supporting certain species and suppressing others.  They can change the habitat ranges of certain species. Many animals tend to deter from their normal range by following the warm waters of the heatwave.  The impact on fisheries and aquaculture is also significant.  Emerging studies have reported their occurrence and impacts in the global oceans, but are little understood in the tropical Indian Ocean.

These events are linked to coral bleaching, seagrass destruction, and loss of kelp forests, affecting the fisheries sector adversely.  An underwater survey showed that 85% of the corals in the Gulf of Mannar near the Tamil Nadu coast got bleached after the marine heatwave in May 2020.  The Western Indian Ocean region experienced the largest increase in marine heatwaves at a rate of about 1.5 events per decade, followed by the North Bay of Bengal at a rate of 0.5 events per decade.

TSPSC  Notes brings Prelims and Mains programs for TSPSC  Prelims and TSPSC  Mains Exam preparation. Various Programs initiated by TSPSC  Notes are as follows:- For any doubt, Just leave us a Chat or Fill us a querry––

Hope we have satisfied your need for TSPSC Prelims and Mains Preparation

Kindly review us to serve even better


TSPSC Mains Test Series 2022

20 Quality mock tests and GS Mains Notes

Mains Test Series and Notes

Mains Printed Notes (With COD)


TSPSC Prelims Test Series 2022

24 Quality mock tests and GS Prelims Notes

Prelims Test Series and Notes

Prelims Printed Notes (With COD)

Subscribe to TSPSC Notes

Never Miss any TSPSC important update!

Join 2,487 other subscribers

error: Content is protected !!