Equatorial Indian Ocean Oscillation

Recently, the Indian Institute of Sciences (IISc), Bengluru and National Centre for Ocean Information Services, Hyderabad jointly released a study paper about Equatorial Indian Ocean Oscillation (EQUINOO) and its effects over Indian Summer Monsoon. Consider the following statements regarding the EQUINOO.

  1. EQUINOO is as an oscillation or a seesaw between enhanced cloud formation and rainfall over the western equatorial Indian Ocean (WEIO) and suppressed clouding over the eastern equatorial Indian Ocean (EEIO) in west of Sumatra.
  2. A positive EQUINOO phase is when the surface sea temperature in WEIO is above 27.5 degree Celsius leading to enhanced clouding, which is then suppressed in the eastern equatorial Indian Ocean.

Choose the correct answer from the codes given below:

Only 1
Only 2
Both 1 and 2
Neither 1 nor 2