学術雑誌論文 植栽・構造物が気温観測統計値に及ぼす影響 : 東京(大手町)における通年観測
Influence of Nearby Plants and Artificial Structures on the Surface Air Temperature Statistics : An in-situ Measurement at Central Tokyo (Otemachi) throughout Years

志藤, 文武  ,  青柳, 曉典  ,  清野, 直子  ,  藤部, 文昭  ,  山本, 哲  ,  Fumitake, SHIDO  ,  Toshinori, AOYAGI  ,  Naoko, SEINO  ,  Fumiaki, FUJIBE  ,  Akira, YAMAMOTO  ,  気象研究所  ,  気象研究所  ,  気象研究所  ,  気象研究所:(現)首都大学東京  ,  気象研究所  ,  Meteorological Research Institute, Japan Meteorological Agency  ,  Meteorological Research Institute, Japan Meteorological Agency  ,  Meteorological Research Institute, Japan Meteorological Agency  ,  Meteorological Research Institute, Japan Meteorological Agency:(Present office)Tokyo Metropolitan University  ,  Meteorological Research Institute, Japan Meteorological Agency

62 ( 5 )  , pp.403 - 409 , 2015-05-31
ISSN:05460921
NII書誌ID(NCID):AN00151568
内容記述
植栽や構造物が気温観測統計値に与える影響を評価するため,気象庁大手町露場(東京都心)の端,植栽と小屋に囲まれた場所に新たな強制通風式温湿度計を設置し,2年間にわたる連続観測を実施した.この気温の観測値を,周囲の構造物の影響が少ない露場中央付近にある現業用の温度計による観測値と比較した結果,5~8月の14~15時の時間帯の時刻別月平均気温は,露場端の方が0.5℃程度高かった.3~9月の日々の観測値を見ると,2つの温度計による15時の気温差と全天日射量の間には0.7を超える正の相関があった.一方,日射の少ない日や夜間は気温差が小さかった.日平均気温に現れる気温差は月平均値にして±0.1℃程度であり,平均気温は日最高気温に比べ設置環境の影響を受けにくいことが示唆された.
In order to clarify the influence of obstacles on temperature measurement, two years' continuous observation was made in the meteorological enclosure of the Japan Meteorological Agency in central Tokyo (Otemachi), by installing an extra thermometer at a spot that was surrounded by trees and was 20 m distant from the thermometer for operational observation. In the early afternoon of the warm season, the temperature at the spot surrounded by trees was found to be higher than the operational temperature. The temperature difference at 15JST was about 0.5 degrees Celsius on the average, and was correlated with daily solar radiation with a correlation coefficient of over 0.7 from March to September. On the other hand, difference of nighttime temperature was generally small, so that the monthly mean difference of daily mean temperatures was less than 0.1 degree Celsius for all the months of the year.
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