JpGU-AGU Joint Meeting 2017

講演情報

[JJ] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS11] [JJ] 大気化学

2017年5月24日(水) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:入江 仁士(千葉大学環境リモートセンシング研究センター)、町田 敏暢(国立環境研究所)、谷本 浩志(国立環境研究所)、岩本 洋子(広島大学 生物圏科学研究科)

[AAS11-P05] Continuous measurement of CO2 and CH4 concentration from a tower network (JR-STATION) over Siberia

*笹川 基樹1町田 敏暢1伊藤 昭彦1津田 憲次2Arshinov Mikhail3Davydov Denis3Fofonov Alexandrov3 (1.国立環境研究所、2.地球・人間環境フォーラム、3.V.E. Zuev Institute of Atmospheric Optics, Russian Academy of Sciences)

キーワード:二酸化炭素、メタン、タワー観測、西シベリア低地帯

Continuous measureements of CO2 and CH4 concentration have been carried out with a tower network in Siberia (JR-STATION: Japan–Russia Siberian Tall Tower Inland Observation Network) in order to study the spatial and temporal variations of CO2 and CH4 and estimate the distribution of the flux over this vast area (Sasakawa et al., 2010, 2012, 2013) where only a few atmospheric investigations were made.
The JR-STATION consists of 6 towers (Figure) located at Berezorechka (BRZ) since 2002, at Karasevoe (KRS) since 2004, at Demyanskoe (DEM) and Noyabrsk (NOY) since 2005, at Azovo (AZV) since 2007, and at Vaganovo (VGN) since 2008. Air samples taken at two heights (5-85 m) on each tower were analyzed with an NDIR (LI-COR, LI-820) for CO2 and a SnO2 semiconductor sensor (Suto et al., 2010) for CH4 after passing through the line with a glass water trap, a Nafion membrane dryer (PERMA PURE, MD-050-72F-2), and a magnesium perchlorate. Measurement precision was ±0.3 ppm for CO2 and ±5 ppb for CH4.
We will discuss the long-term variations in CO2 and CH4 observed with the present system. From the year of 2015, we installed a Cavity Ring-Down Spectroscopy (CRDS; Picarro inc.) at KRS, DEM, and NOY. We thus validate the recent data with the data by the CRDSs.

References
Sasakawa, M. et al., Tellus 62B, 403-416, 2010.
Sasakawa, M. et al., Tellus 64B, doi:10.3402/tellusb.v64i0.17514, 2012.
Sasakawa, M. et al., J. Geophys. Res. 118, 1-10, doi:10.1002/jgrd.50755, 2013.
Suto, H. et al., J. Atmos. Ocean. Tech. 27, 1175-1184, 2010.