568454.fig.005a
(a)
568454.fig.005b
(b)
568454.fig.005c
(c)
568454.fig.005d
(d)
Figure 5: Composite plot of the wind speed at the surface (solid gray line), at the 700 hPa pressure level (dashed gray line), and the angle between wind directions at those surfaces (black bars). The wind speed is given in m s−1; the angle in degrees . The IGRA data analysis for Ny-Ålesund is shown for four seasons: winter (a), spring (b), summer (c), and autumn (d).