サガワ ヒデオ   SAGAWA HIDEO
  佐川 英夫
   所属   京都産業大学  理学部 宇宙物理・気象学科
   職種   教授
言語種別 英語
発行・発表の年月 2016/09
形態種別 研究論文
査読 査読あり
標題 Sensitivity of net thermal flux to the abundance of trace gases in the lower atmosphere of Venus
執筆形態 その他
掲載誌名 Journal of Geophysical Research: Planets
出版社・発行元 AMER GEOPHYSICAL UNION
巻・号・頁 121(9),pp.1737-1752
著者・共著者 Lee, Y. J,Sagawa, H,Haus, R,Stefani, S,Imamura, T,Titov, D. V,Piccioni, G
概要 We calculated the net thermal flux in the atmosphere of Venus from the surface to 100 km altitude. Our atmospheric model was carefully constructed especially for altitudes below the clouds (< 48 km), using recent CO2 absorption data. It includes updated collision-induced absorptions in the < 250 cm(-1), 1200-1500 cm(-1), and 2650-3130 cm(-1) wave number ranges. We studied sensitivity of the net thermal flux below the clouds on the abundances of trace gases that were varied within the range reported by observations. Our results reveal a considerable effect of trace gases on radiative budget. We successfully simulate net thermal flux profiles measured in situ by the Night and North probes of Pioneer Venus using 20-50 ppmv H2O, suggesting that the high H2O abundance of 200 ppmv derived in the earlier analysis is not required. Our sensitivity study shows that the trace gases SO2, H2O, and OCS are effective thermal agents, while CO and HCl influences are rather weak. We suggest that the influence of the former three gases should be taken into account to estimate the net radiative energy in the deep atmosphere.
DOI 10.1002/2016JE005087
ISSN 2169-9097/2169-9100