Consider the following statements regarding Pacific Decadal Oscillation PDO 1 It is a sea surface te...........

Geography and Environment(BPSC) World climates

Consider the following statements regarding Pacific Decadal Oscillation (PDO):

1. It is a sea surface temperature (SST) climate cycle (or teleconnection) describing sea surface temperature anomalies over the North-eastern Pacific Ocean.

2. The PDO oscillates between positive and negative phases.

3. Negative phase of the PDO tend to be associated with periods of more rapid global warming

4. It is a short-term climate pattern.

How many of the above statements are correct?

Only one

Only two

Only three

All four

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Explanation:

Statement 3 is incorrect : Positive phases of the PDO tend to be associated with periods of more rapid global warming whilst cold PDO events have been linked to severe droughts spanning many years in south western USA, as well as increased rainfall over eastern Australia.
Statement 4 is incorrect: The Paci fi c Decadal Oscillation (PDO) is a long-term climate pattern that affects the temperature of the Paci fi c Ocean and the weather patterns around it.
Supplementary notes: Paci fi c Decadal Oscillation (PDO) The Paci fi c Decadal Oscillation (PDO) is a climatic event which covers vast areas of the Paci fi c Ocean over periods of 20 to 30 years.
The PDO has positive and negative phases.
The climate impacts experienced during a PDO event can go hand-in-hand with impacts from El Nino or La Nina.
If both phenomena are in the same phase, their associated impacts can be ampli fi ed.
In the opposite phase, the associated impacts on global climate may be reduced.