[A-AS01] Global Carbon Cycle Observation and Analysis

[AAS01-12] Network connection of tower flux measurement data
:Toward long term stable flux measurement

*小南 裕志¹、山野井 克己¹、北村 兼三¹、深山 貴文¹、溝口 康子¹、高梨 聡¹、安田 幸生¹、三枝 信子²、高橋 善幸²、金 元植⁴、宮田 明⁴、小野 圭介⁴、石戸谷 重之³、近藤 裕昭³、前田 高尚³、村山 昌平³、パウサイ サムロン⁵、アチャワコム タクシン⁶ (1.国利研究開発法人森林総合研究所、2.国立環境研究所、3.産業技術総合研究所、4.国立研究開発法人農業環境技術研究所、5.タイ国立公園野生生物保護局、6.タイ科学技術研究院)

キーワード：CO2 flux, Land ecosystem, Flux tower

Since last half of 1990's, many flux towers have been constructed mainly for monitoring CO₂ flux using eddy covariance method at various land ecosystems in the world. And much effort have been made to keep data quality. Comparing with standard environmental factors (e.g. sun radiation, wind speed), eddy covariance measurement requires sensitive equipment (infrared CO₂ gas analyzer and supersonic anemometer), frequent maintenance and severe data quality are necessary. On the other hand, to evaluate the effect of land ecosystem to global climate change, long term and quality certified data are demanded. We, 4 national research institutes, constructed and have maintained 11 CO₂ flux measurement towers in Japan and East Asia (Fig.1, 8 in Japan and 3 in East Asia countries). To reduce effort of maintenance and increase data quality, we have conducted following contrivances supported by Environmental Agency Fund.
1. For quick check of flux measurement devices and data quality, we constructed the system to integrate whole flux site data in a data saver at Tsukuba using network.
2. To reduce effort of data analysis, we set up standardized flux data format and developed an automated flux data analyze system.
3. To check each site data quality, we developed a mobile closed pass CO₂ flux measurement system
4. For quick learning of flux measurement technique, we published a flux measurement manual
(http://www2.ffpri.affrc.go.jp/labs/flux/manual/FluxManual_Ver1.1b.pdf)