Curving waves from Atlantic may be drying up monsoon.
Context
Curving waves from Atlantic may be drying up monsoon.
What are curving waves?
- These are the resulting wave of air currents, called a Rossby wave.
- This is curved down from the North Atlantic and squeezed in by the Tibetan plateau and hit the Indian subcontinent around mid-August, suppressing rainfall and throwing off the monsoon that was trying to recover from the June slump.
- The wave’s usual course is to go from west to east, but not towards the equator.
What affects the monsoon?
- El Nino-Droughts in India have historically been associated with El Nino, an anomalous warming of equatorial Pacific.
- Disturbance from North Atlantic region- Nearly six out of 10 droughts, in non El Nino years, that occurred during the Indian summer, monsoon season may have been driven by atmospheric disturbances from the North Atlantic region.
- The Indian Ocean and Pacific Ocean seem to be at the forefront of all discussions surrounding Indian monsoon droughts.
