@techreport{oai:jaxa.repo.nii.ac.jp:00041491, author = {町田, 敏暢 and 矢澤, 健司 and 田頭, 剛 and 井上, 元 and 田丸, 卓 and Machida, Toshinobu and Yazawa, Kenji and Tagashira, Takeshi and Inoue, Gen and Tamaru, Takashi}, month = {Jan}, note = {燃焼主要生成物であり社会的にも問題視されている温度効果ガスの2酸化炭素について、3年間にわたり相模湾で高度7kmまでの鉛直分布を観測した結果について報告する。航技研機を用いて1996年12月から1999年12月までほぼ月2回のペースで大気採取を行い、採取大気を国立環境研究所において分析した。ここでは高度および季節による変動などを解析した結果について報告する。, In order to ascertain temporal and spatial variations in atmospheric carbon dioxide (CO2) levels near the Tokyo metropolitan area, air samples have been collected by airplane since December 1996, over Sagami-Bay (35.0 - 35.1 deg N, 139.2 - 139.4 deg E) in Japan. Sampling was carried out monthly from December 1996 to May 1997 and twice a month from June 1997 to December 1999, at eight altitudes from 0.5 km to 7 km. The CO2 concentration in these samples shows clear seasonal variation and secular increase. In the seasonal variations, larger amplitude and earlier phase were observed at lower altitudes. Annual average of CO2 concentration is higher at lower altitudes, suggesting that the ground surface around the observed area act as a source of atmospheric CO2. Extremely high CO2 concentrations accompanied by high concentrations of CH4, N20, CO and H2 were observed several times at lower altitudes, implying that anthropogenic air from the Tokyo metropolitan area often reaches to Sagami-Bay., 資料番号: AA0028667000, レポート番号: NAL TR-1422}, title = {相模湾上空における大気中二酸化炭素濃度の航空機観測}, year = {2001} }