GG231 Lecture Notes - Lecture 11: Return Period, Jet Stream, Azores High
Document Summary
For instance, in the northern hemisphere hurricanes track westward in the trade winds across the atlantic ocean and curve to the right. Bermuda high: can influence the track of a hurricane because of its persistent high pressure anticyclone that remains anchored in the north atlantic many hurricane tracks curve around the west side of this. Two main factors cause their formation: strong temperature gradient in the air near the surface, strong winds in the upper atmosphere. These strong winds often are associated with jet streams. Northern hemisphere has two jet stream the polar jet stream and the sub-tropical jet stream. Extra tropical cyclones commonly develop in an area where jet stream winds curve cyclonically or diverge such as the east side of the low pressure trough. Front = boundary separating two masses of air or different densities. Surface temperature gradient is strongest along a cold, warm, stationary front, therefore most extratropical events occur along fronts.
