The North Atlantic Oscillation is associated with strengthening of the pressure differences between the Icelandic Low and Azores high.

Question

Quizplus · Accepted Answer

The North Atlantic Oscillation is defined as the variation of atmospheric pressure between the Icelandic Low and Azores high, and is measured as the difference in sea-level pressure between these two regions. When the NAO is in a positive phase, there is a stronger gradient between the low and high pressure systems, leading to stronger westerly winds and storm tracks. Conversely, when the NAO is in a negative phase, the pressure gradient weakens and the westerlies are weaker. Therefore, the statement is true that the NAO is associated with strengthening of the pressure differences between the Icelandic Low and Azores high.

The North Atlantic Oscillation Is Associated with Strengthening of the Pressure