Fig. 2
From: Spatio-temporal variability of jet streams over North America and North Pacific Ocean
Spatio-temporal Changes of NAJET and NPOJET in April (A), May (B), and June (C) in four decades. [The lines in figures “b” show the Jetstream trajectories in the NPO] [The lines in figures “c” indicate the direction of jet streams in the west and east of NA] [In the shapes “a” we can see the color lines as Isotach which indicate the connecting points of equal wind speed. It also determines the atmospheric-level activities of jet streams, and the region affected by jet streams] [The vertical black shading indicates regions of maximum jet stream suction, where its mechanism is most intense and extends its influence to lower atmospheric levels] [The tables reveal the annual activities of jet stream in each path in April, May, and June] [The histograms show the trend of changes in atmospheric-level of jet streams from 1984 to 2023 in NA and NPO regions. The blue line is for NPO, and the orange line is for NA]. The absence of a year in the table and the broken line in the diagram indicate that no jet stream activity was detected during that specific month/year based on the synoptic analysis maps.
