Abstract
1. Introduction Recent warming increasing heat-stress brings about heat-islamd in basin cities remarkably during summer. Any wind-direction causes Foehn in basin city so that highest temperature occurs frequently. In this report the authors try to review heat-islands in some basin cities. On the other hands, ANEDAS stations should be checked how to measure air-temperature because some AMEDAS stations record higher temperatures in spite of neither urban area nor basin. 2. Study method (1) Bird’s eye view is attempted about the basin cities’ heat-islands which had been investigated by us in the past. (2)Based on the data of regional meteorological observatories the authors compare annual amplitudes of air-temperatures and days of highest temperature above 30 in basin cities with ones in non basin cities. Besides the data of calms ratio in basin and non basin cities are compared.(3) A few of AMEDAS stations were checked how to observe air-temperature. 3. Results and considerations 3-1 Heat-island patterns look like the figures of basin or wind-rose. 3-2 Annual amplitude of air-temperature, days of highest temperature above 30 and calm-ratio in basin cities are larger than ones in non basin cities. 3-3 The authors think that some AMEDAS stations record higher temperatures in spite of neither urban area nor basin because the surface conditions of air-temperature observation are quite different between AMEDAS and non-ANEDAS stations.
