Fig. 1. Topography and analysis domains (D1, D2, D3). The altitude above mean sea level is shaded. Dashed circles represent 150 km ranges from GSN and SSP radar. Box symbols indicate the locations of radar.
Fig. 2. Flow chart of the construction of valid motion vectors from GSN, SSP radar data.
Fig. 3. Normalized frequency distribution of the direction and speed of motion vectors in D2 during the entire period. Upper (right) panel shows normalized frequency distribution of speed (direction) of motion vectors. ‘X’ mark indicates maximum frequency, whiskers represent the median, first and third quartile.
Fig. 4. Diurnal variation of normalized frequency distribution of the (a) direction and (b) speed of motion vectors in D2 during the entire period. Upper panel shows time-averaged normalized frequency distribution. ‘X’ mark indicates maximum frequency for every hour and whiskers represent the median, first and third quartile.
Fig. 5. Same as in Fig. 5 except for (a), (d) June, (b), (d) July, (e), (f) August. Upper and lower panels are the direction and the speed of motion vectors, respectively.
Fig. 6. Diurnal variation of the (a) direction and (b) speed of motion vectors in D2 for each month. Solid line indicates the mean and dashed lines represent standard deviations from the mean.
Fig. 7. Spatial distribution of the (a) mean direction and (b) mean speed of the motion vectors in D2. Standard deviations of (c) direction and (d) speed of motion vectors are also presented. Only 13 × 13 out of 25 × 25 vectors is displayed.
Fig. 8. Same as in Fig. 7a and Fig. 7b except for (a), (d) June, (b), (e) July, (c), (f) August. Upper and lower panels are the direction and the speed of motion vectors, respectively.
Fig. 9. Hovmöller Diagram of the (a) direction and (b) speed of motion vectors in D3. Upper panels show averaged direction and speed (in blue) of motion vectors and topography height (in black).
Table 1. Specification of GSN and SSP radars.
Table 2. The number of 2 km MOSAIC used for generating motion vectors, the number of valid motion vectors, and the ratio of valid motion vectors to the generated motion vectors.
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