Context: Recently, Researchers at the Indian National Centre for Ocean Information Services (INCOIS), Hyderabad have reportedly found a way to better forecast the Boreal Summer Intra-Seasonal Oscillation (BSISO).
About BSISO

• The BSISO of the Asian summer monsoon (ASM) is one of the most prominent sources of short-term climate variability in the global monsoon system.
• It is the movement of convection (heat) from the Indian Ocean to the western Pacific Ocean roughly every 10-50 days during the monsoon (June-September).
• They found that waves induced by active phases of BSISO are nearly 0.5 meters higher than those which occur during other phases of BSISO. The active phases of BSISO occur between June and August which are the monsoon summer months.
• Compared with the related Madden-Julian Oscillation (MJO) it is more complex in nature, with prominent northward propagation and variability extending much further from the equator.
• It represents the monsoon’s ‘active’ and ‘break’ periods, in which weeks of heavy rainfall give way to brilliant sunshine before starting all over again.
• The active phase also enhances monsoon winds and hence the surface waves.

Significance

• Some phases of boreal summer intra seasonal oscillation or BSISO induce high wave activity in north Indian Ocean and Arabian Sea, the researchers claimed. 
• The will help improve wave forecasts along India’s coasts and mitigate adverse impacts of high waves (coastal flooding, erosion, etc). Sea-navigation routes can also be better planned. 
• This finding has a great significance in developing seasonal and climate forecast service for waves and coastal erosion for India.