Q. With reference Pacific Decadal Oscillation (PDO) consider the following statements:
1.It is a long-term climate pattern that affects the temperature of the Pacific Ocean and the weather patterns around it.
2.The PDO has a shorter timescale than phenomena like El Niño.
3.During a positive phase of PDO, warmer sea surface temperatures are observed in the central and eastern Pacific, while cooler temperatures prevail in the western Pacific.
Which of the statements given above is/are correct?
Answer: C
Notes:
Explanation –
Statements 1 and 3 are correct. PDO is a long-term climate pattern that affects the temperature of the Pacific Ocean and the weather patterns around it. During a positive phase of PDO, warmer sea surface temperatures are observed in the central and eastern Pacific, while cooler temperatures prevail in the western Pacific. ENSO with a positive PDO is generally not good for India but when linked with a negative PDO, it brings more rain to India.
Statement 2 is incorrect. The PDO has a longer timescale than phenomena like El Niño and La Niña, spanning decades rather than just a few years.
Source: ForumIAS
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