Masayuki INOUE

National Institute of Polar Research Repository

3. Measurements of Drifting Snow at Mizuho Camp, 197 4 - 1975 Masayuki INOUE* Measurements of the mass flux of drifting snow, together with wind speed, were carried out with a new drawer-type collector improved from Kobayashi's (Kobayashi, 1975). The collector has ten drawers with a 5 cm x 5 cm entrance, and can measure the mass flux at different heights from the surface to 1 m height (Fig. 1). The collection efficiency of this collector was about O. 55 (Inoue, to be submitted)·. The observation was made in a wide and fairly flat area. The wind speed was measured at the height of 3. 5 m and air temperature at 1. 5 m. The results are given in Table 1. References Kobayas,hi, S. ( 1975): Saikuron-kata jifubuki-kei to hikidashi-kata jifubuki-kei no hikaku ( A comparison between cyclone-type and chest-of-drawer-type drift collectors). Teion Kagaku ( Low Temp. Sci.), Ser. A , 32, 89 - 95. Inoue, M. ( 1977): Measurements of drifting snow at Mizuho Camp. ( to be sub­mitted to Antarct. Rec. ) . 0 Fig. I. I 0 0 A schema of drawers-type collector. * The Institute of Low Temperature Science, Hokkaido University, Sapporo 060. -156-..... CJl --:i No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Date 1974.July 8 13 14 14 17 22 25 28 Aug. 3 4 5 9 17 23 28 29 Dec. 5 7 1975, Fel>. 3 3 Table 1. Results of drifting snow observations, where T and V represent air temperature at 2. 5 m in height and wind speed at 3. 5 m, respectively. 'T'ime - 3 -;. -I Mass flux ( x 10 • g·cm •sec ) (min) 0-5 10-15 20-25 30-35 40-45 50-55 60-65 70-75 80-85 90-95 15 86.7 20.8 9.4 7. 9 8.0 7.6 7.6 6.8 6.4 ---10 418 94.6 34.3 22.4 17.5 14.8 13. 3 10.8 9.7 9.0 10 270 96.8 25.8 15.2 11. 2 8.1 7.3 5.7 5.1 3.2 7 371 164 56.0 35.8 26.0 18.3 11 .·o 12.6 12.0 10.9 7 622 304 115 75.3 57.0 44.3 42.0 36.6 33.3 30.9 5 648 175 80.8 55.3 42.0 31. 0 29.4 22.9 20.7 19.1 5 194 45.1 15.9 11. 9 9.8 6.8 7.0 5.4 5.1 5.1 5 641 452 157 81. 7 58.7 45.8 39.2 33.7 31. l 30.6 5 585 179 78.3 47.5 35.0 25.6 22.4 17.5 15.5 14. 0 5 1786 787 403 278 224 170 145 130 llO 1 107 3 1019 470 271 198 163 137 128 110 99.8 82.7 5 382 119 28.2 15.8 11. 2 6.8 7.0 5.4 5.1 3.8 3.5 112 58.4 28.0 24.4 18.0 13. 4 14. O 9. 6 11. 0 9.1 11. 5 136 49. 3 11.1 6.3 4. 9 4.2 3.7 2.3 2.7 2.3 5 428 173 so.a 51. 4 39.2 36.3 26.6 21. 6 18.l 16.6 5 302 106 42.9 25.0 19.5 14.8 14.0 10.8 9.1 7.6 7 375 102 26.3 11. 4 5. 7 3. 7 3.0 2. 8 2.7 2.7 7 729 205 52.5 23.6 20.0 10.6 8.5 7.2 7. 9 ---10 290 102 27.6 13. 2 10.5 4. 0 4. 2 2. 7 2.6 1. 9 10 544 200 60.7 29.0 21. 7 16.8 11. 2 8.7 7.8 5.7 V (m· sec') ( oc) 12 -48 14 -36 14 -35 16 -32 15 -32 16 -30 13 -35 18 -48 15 -38 19 -42 20 -32 13 -50 13 -35 12 -42 17 -38 15 -39 15 - 9 17 -13 14 -15 16 -17 

3. Measurements of Drifting Snow at Mizuho Camp, 1974-1975 (III. SURFACE METEOROLOGICAL DATA)

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3. Measurements of Drifting Snow at Mizuho Camp, 1974-1975 (III. SURFACE METEOROLOGICAL DATA)

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