論文

査読有り
2018年7月

Balloon-borne tropospheric CO2 observations over the equatorial eastern and western Pacific

ATMOSPHERIC ENVIRONMENT
  • Yoichi Inai
  • ,
  • Shuji Aoki
  • ,
  • Hideyuki Honda
  • ,
  • Hiroshi Furutani
  • ,
  • Yutaka Matsumi
  • ,
  • Mai Ouchi
  • ,
  • Satoshi Sugawara
  • ,
  • Fumio Hasebe
  • ,
  • Mitsuo Uematsu
  • ,
  • Masatomo Fujiwara

184
開始ページ
24
終了ページ
36
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.atmosenv.2018.04.016
出版者・発行元
PERGAMON-ELSEVIER SCIENCE LTD

Vertical profiles of carbon dioxide (CO2) mixing ratio in the equatorial eastern and western Pacific were measured by newly developed balloon-borne CO2 sondes in February 2012 (two soundings) and February-March 2015 (four soundings), respectively. The 1-10 km vertically averaged CO2 mixing ratios lie between the background surface values in the Northern Hemisphere (NH) and those in the Southern Hemisphere (SH) monitored at ground-based sites during these periods. A backward trajectory analysis, taking account of convective mixing processes using geostationary satellite cloud-image data, is applied to the measured CO2 profiles to estimate the origin of the observed air masses. Air masses originating in the SH show low CO2 mixing ratios that are similar to the background values in the SH. This relationship is confirmed by a positive correlation (similar to 0.6) between the CO2 mixing ratio and the latitude of air mass origin which is found from trajectory calculations. This result suggests that the CO2 distribution in the troposphere over the equatorial Pacific is controlled by monthly time scale, large-scale CO2 distribution and weekly time-scale atmospheric transport processes. Furthermore, this study shows that the combination of CO2 sonde measurements and trajectory analysis, taking account of convective mixing, is a useful tool in investigating CO2 transport processes.

Web of Science ® 被引用回数 : 4

リンク情報
DOI
https://doi.org/10.1016/j.atmosenv.2018.04.016
Scopus
https://www.scopus.com/record/display.uri?eid=2-s2.0-85049523489&origin=inward
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000433652300004&DestApp=WOS_CPL
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85049523489&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85049523489&origin=inward