Hideki NARITA

Masayoshi NAKAWO

Tamio ISOBE

National Institute of Polar Research Repository

VI. Temperature Profiles in Surface Snow Layer at Mizuho Station Observers: Hideki NARITA, Masayoshi NAKAWO, Kenji ISHIZAWA, Gooki IWASHITA, Hiroaki BABA The measurements were made using platinum resistance thermometers placed in metal pipes, which were installed in 1979 by Wada et al. ( 1981) at several depths in a surface snow layer. A spot reading of the resistance for each thermometer was made twice a month with a standard digital volt­meter. Tl1e resistance was converted into temperature using a normal formula. The results are tabulated in Table Vl-1. Ohata et al. (1983) provided the latest data on the levels of the ther­mometers, which were determined on January 13, 1981. After that time, approximately 5 cm of snow accumulated on the surface in the following two years (Satow et al., 1983; Takahashi, 1983), resulting in lowering of the thermometer levels by the same amount. The depths of the thermometers in January 1983, given in Table VI-1, were thus obtained by adding 5 cm to the depths in 1981. The change in the levels of the thermometers was monitored during the observation period in 1983 by measuring the accumulation/ablation of snow at the place below which the thermometers were located. The varia­tion of the surface levels, however, was as small as ±2 cm throughout the year. It is considered, hence, that the change in depths of the thermometers was negligible for the year of 1983. References Ohata, T., Ishikawa, N., Kobayashi, S. and Kawaguchi, S. (1983): POLEX­South Data, Part 4, Micrometeorological data at Mizuho Station, Antarctica in 1980. JARE Data Rep., 79 (Meteorol. 13), 374p. Satow, K., Nishimura, H. and Inoue, J. (1983): Glaciological data collected by the Japanese Antarctic Research Expedition in 1981. JARE Data Rep., 82 (Glacial. 9), 8lp. Takahashi, S. (1984): Net accumulation of snow by stake method in 1982. JARE Data Rep., 94 (Glacial. 10), 15-61. Wada, M., Yamanouchi, T., Mae, S., Kawaguchi, S. and Kusunoki, K. ( 1981): POLEX-South data, Part 2, Micrometeorological data at Mizuho Station, Antarctica in 1979. JARE Data Rep., 62 (Meteorol. 9), 321p. - 79-Table VI-1. Temperature profile at Mizuho Station. ( ° C) Depth in m 0.9 1.4 3.4 5.4 10.4 16 Feb. -24.2 -25.2 -29.4 -33.2 -33.9 1 Mar. -27 .o -26.7 -29.4 -32.7 -33.7 17 Mar. -29.7 -29.2 -29.0 -32.2 -33.7 6 Apr. -31. 7 -31.2 -30.2 -31.9 -33.4 19 Apr. -33.4 -32.2 -30.4 -31.9 -33.4 30 Apr. -34.7 -33.4 -30.9 -31.9 -33.2 15 May -35.2 -34.3 -31.4 -32.1 -33.3 2 June -36.8 -35.9 -32.6 -32.4 -33.0 15 June -38.1 -37.0 -33.3 -32.6 -33.2 30 June -37 .1 -36.9 -33.6 -32.9 -32.8 15 July -36.9 -36.5 -34.6 -33.2 -33.1 3 Aug. -38.8 -37.4 -34.6 -33.5 -32.8 18 Aug. -40.5 -39.3 -35.2 -33.7 -33.0 31 Aug. -38.4 -38.1 -35.7 -34.2 -33.0 21 Sep. -37.2 -36.7 -35.4 -34.4 -33.2 30 Sep. -37.9 -37.2 -35.2 -34.5 -33.4 15 Oct. -36.7 -36.2 -34.8 -34.0 -32.9 30 Oct. -33.8 -34.4 -33.2 -34.4 -32.9 15 Nov. -33.8 -34.2 -33.0 -34.8 -33.8 30 Nov. -30.8 -32.1 -32.9 -34.7 -33.8 15 Dec. -29.2 -30.7 -33.8 -34.0 -33.9 30 Dec. -27 .1 -28.3 -32.3 -33.8 -33.8 -80-70S 5�695 \ \ \ \ H\ \ ' \ \ \ G16 , •, .. , z\ / � • ,. , • , / J • G 2 sz '' .... � --............. � ':� \�\-:; :,YAMATO SS/ -- __ .o_MIZUHO ;_ 1 J J '4M a- � , G 9 * - ... - " - - - - ... 'GJ - .,.. ' ' •' �...,,,,.� �*RY175 GlO ,, ....... � YM179 Y"� ... -.!- -- - - -- �\ NY • -V)''t \ .- ) - I jYJ \ ··, , • .,, .. GlJ RY / 82 /_ ' � S0R RONOANE -,� ... --�12., ,. .- .,. : ---+-- \ 83 \ J •-4 - G 11 I K G�5 --+------� _ BELGICA t 72' c; ,-------------J 25E \ / I -; o 0 ,o ' .,.. ,, ....... -o- -- - ,,,o--KR 7Js �o� 90W 90E 745 0 50 100km 30E 3SE Fig. A. A map of the routes of the over�now traverses in the Mizuho Plateau - East Queen Maud Land area by JARE-24 in 1983-1984. 180 

GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 2, 1983

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GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 2, 1983

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