Present address: Akita Prefectural University, 241-438 Kaidobata-Nishi, Nakano Shimoshinjo, Akita City 010-0195, Japan.
Automated sampling system for long-term monitoring of nitrous oxide and methane fluxes from soils
Article first published online: 28 MAY 2009
© 2009 Japanese Society of Soil Science and Plant Nutrition
Soil Science & Plant Nutrition
Volume 55, Issue 3, pages 435–440, June 2009
How to Cite
AKIYAMA, H., HAYAKAWA, A., SUDO, S., YONEMURA, S., TANONAKA, T. and YAGI, K. (2009), Automated sampling system for long-term monitoring of nitrous oxide and methane fluxes from soils. Soil Science & Plant Nutrition, 55: 435–440. doi: 10.1111/j.1747-0765.2009.00379.x
- Issue published online: 28 MAY 2009
- Article first published online: 28 MAY 2009
- Received 15 January 2009.Accepted for publication 11 March 2009.
- greenhouse gas;
- long-term monitoring;
We describe an automated gas sampling system for monitoring trace gas fluxes from soils. The sampling system allows automated collection of gas samples in glass vials using a syringe pump connected to an automated static chamber installed in the field. The gas samples are transferred to a laboratory and then analyzed using a gas chromatography system. Comparisons between manual and automated sampling of standard gases showed good agreement (r2 = 0.99996 for N2O, r2 = 0.999 for CH4 and r2 = 0.998 for CO2). In a field test, replicated flux measurements using two chambers generally showed good agreement. The sampling system allows frequent and long-term monitoring of fluxes under a wide range of weather conditions (tested temperatures ranged from –6.5 to 40°C; 127 mm day−1 max precipitation). The major advantages of the system are its increased portability, ease of operation and cost effectiveness compared with on-line automated sampling/analytical systems.