2. With reference to the Indian Ocean Dipole (IOD), consider the following statements:
- It refers to the difference in sea surface temperatures between the western and eastern equatorial Indian Ocean.
- A positive IOD involves warmer-than-normal waters in the western Indian Ocean and cooler-than-normal waters in the eastern Indian Ocean.
- A positive IOD can sometimes counteract the adverse impact of El Niño on the Indian monsoon.
Which of the statements given above is/are correct?