Indian Ocean Dipole

Consider the following statements:

  1. Sustained changes in the difference between sea surface temperatures of the tropical western and eastern Indian Ocean are known as the Indian Ocean Dipole (IOD).
  2. The IOD affects the climate of Australia and other countries that surround the Indian Ocean Basin, and is a significant contributor to rainfall variability in this region.

Which of the following statements given above is/are correct?

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