Development of 6 channel portable CO_2 sampling system and its practical use

6通道便携式CO​​_2采样系统的研制及其实际应用

• 批准号: 11556026
• 负责人: KOIKE Takayoshi
• 金额: $ 3.58万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11556026/
• 关键词: auto-sampling; CO_2 concentration; 6 channel; no commercial electric power supply; data-logger; CO_2濃度; CO_2; 多点; 携帯型; バッテリー

Portable CO_2 sampling system with 6 channels auto-sampler was developed and its practical use in a larch plantation was performed. A new system can provided information of diurnal change on CO_2 concentration and flow rate at the sampling of 6 different strata in a larch plantation. A machine could work for 4 days with two batters(for auto mobiles, 12 V). This system could work well but we could not confirm the lessen its weight and fail the improvement of waterproof. These are big point for requiring further improving. CO_2 concentration near ground varied largely from 350ppm at daytime to 489ppm before sunrise. In contrast, CO_2 concentration at canopy position ranged from 320ppm before noon and 410ppm during night. These fluctuation was strongly affected by wind direction and speed. A sudden increase of CO_2 concentration may be attributed to precipitation which would increase activities of soil micro-organisms.

研制了便携式6通道自动采样器CO_2采样系统，并在落叶松种植园中进行了实际应用。该系统可提供落叶松种植园6个不同层次CO_2浓度和流量日变化的信息。一台机器可以用两个电池工作4天（对于汽车，12 V）。该系统可以很好地工作，但我们不能确定减轻其重量和防水性能的改善。这些都是需要进一步改进的重点。近地面CO_2浓度变化较大，白天为350ppm，日出前为489ppm。而冠层CO_2浓度变化范围为中午前320ppm，夜间410ppm。这些波动强烈地受风向和风速的影响。CO_2浓度的突然升高可能是降水增加了土壤微生物的活动所致。

项目成果

Kitaoka, S., Wang, W., Okuda, S., Koike, T.: "Gas exchange capacity of forest canopy of a larch plantation-an assessment of gas exchange capacity with measuring A-Ci relation. Trans."Hokkaido Br., Jpn.For.Sco.. 49. 15-17 (2001)

Kitaoka, S.、Wang, W.、Okuda, S.、Koike, T.：“落叶松人工林冠层的气体交换能力 - 通过测量 A-Ci 关系来评估气体交换能力。Trans。”北海道 Br

小池孝良: "CO_2濃度上昇と森林の応答能研究の動向"大気環境学会. 34. A35-A52 (1999)

Takayoshi Koike：“CO_2 浓度上升趋势和森林响应能力研究”大气环境学会 34. A35-A52 (1999)。

Koike, T., Kitaoka, S., Wang, W.and Ueda, T.: "Development of 6 channel portable CO_2 sampling system and its practical use in a larch plantation."Trans.Hokkaido Br., Jpn.For.Sco.. 49. 45-47 (2001)

Koike, T.、Kitaoka, S.、Wang, W. 和 Ueda, T.：“6 通道便携式 CO_2 采样系统的开发及其在落叶松种植园中的实际应用。”Trans.Hokkaido Br.，Jpn.For.Sco

Koike T. Nakamura, M.: "Seasonal change in the photosynthetic capacity of two birch species native to northern Japan: A"In: Terazawa, M., et al. Eds. Birch Wood Utilization, Bifuka,. (印刷中). (2000)

Koike T. Nakamura, M.：“日本北部两种桦树物种光合能力的季节变化：A”，载于 Terazawa, M. 等编辑，Birch Wood Utilization，Bifuka，。 (2000)

小池孝良・北岡 哲・王 文杰・上田龍四郎: "携帯型6点式CO_2濃度サンプリング装置の開発"日本林学会北海道論文集. 49. 45-47 (2001)

Takayoshi Koike、Satoshi Kitaoka、Wenjie Wang、Ryushiro Ueda：“便携式 6 点 CO_2 浓度采样装置的开发”日本林业学会北海道会议记录 49. 45-47 (2001)。