Amir Mohsen
متخصص بخش هواشناسی
Figure 1: The "North Annular Mode" pattern, which describes a large fraction of the monthly to decadal changes in northern hemisphere climate. When there's a deficit of air mass in the red areas, there tends to be a surplus in the blue areas, and vice versa. At the same time, the jet stream winds tend to speed up or slow down in the direction of the green arrows. A similar pattern exists in the southern hemisphere.
