Distribution of the Air Temperature and the Phase of its Diurnal Variation in the Urban Area of Sendai:preliminary report

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The authors observed the air temperature in and around the urban area in Sendai in the cold season (Oct.-Dec., 1968). The results of observations can be summarized as follows ;<BR>1) The differences between the daily minimum air temperature in urban area and that in suburbs range 2.5 to 4.5°C. 2) Influenced by the prevailing wind, the relatively warmer area appeared in the leeward of the urban center (Fig. 2). 3) The distributions of warmer area and colder area in the forenoon (Fig. 4) and in the night (Fig. 3) are reversed. 4) In the air temperature distribution along the route (A-B-C-D in Fig. 1), a relatively warm-island appears in the urban area in the afternoon (Fig. 6-1) and it develops noticeably during the night (Fig. 6-2, 3). However, the area becomes an area of relatively low temperature after sunrise (Fig. 6-5, 6). 5) The phase of the diurnal variation of the air temperature is retarded in the urban center than in the suburbs (Fig, 7). 6) The facts above mentioned will be understood from the view point of thermal capacity of urban area.
東北地理学会の論文