岡山大学環境理工学部 Acta Medica Okayama 2187-6940 22 1 2017 岡山地方気象台観測露場移転による気温低下量の推定 61 64 EN Takeshi Miura Graduate School of Environmental and life Science, Okayama University Yu Ueda Graduate School of Environmental and life Science, Okayama University Hidenori Morita Graduate School of Environmental and life Science, Okayama University Hidetaka Chikamori Graduate School of Environmental and life Science, Okayama University Masahiro Kurokawa Yoshitaka Nakashima Graduate School of Environmental and life Science, Okayama University Yoko Oki Graduate School of Environmental and life Science, Okayama University 10.18926/fest/54863 Statistical change in official temperature records at Okayama City caused by relocation of meteorological observation field of Meteorological Agency was evaluated. The observation field of Okayama local meteorological observatory was moved to the Tsushima Campus of Okayama University from the downtown area of Okayama City in March, 2015. Comparison between the air temperature records measured at meteorological agency station and the records at Tanjo Pond in Tsushima Campus, showed 0.56 ℃ drop in annual average before and after relocation. Moreover, comparison between the records of Okayama local meteorological observatory and that at the surrounding meteorological observing 9 stations showed 0.55 ℃ drop in annual average. Those results suggest that the relocation dropped annual average of air temperature by about 0.6 ℃. No potential conflict of interest relevant to this article was reported.