Development of advanced evaluation method for terrestrial CO2 budget by improving nitrogen-cycle processes

通过改进氮循环过程开发陆地二氧化碳预算的先进评估方法

• 批准号: 23310015
• 负责人: SAIGUSA Nobuko
• 金额: $ 12.65万
• 依托单位: National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23310015/
• 关键词: 陸域生態系; 気候変化; 炭素循環; 窒素循環; 生態系モデル; 温度操作実験; 窒素動態; CO2吸収; ＣＯ２収支; CO2収支

Temperature and nitrogen manipulation experiments were conducted in a forest ecosystem in Japan to understand the responses of ecosystem function and structure to the changes in temperature and nitrogen deposition. Environmental control on the CO2 exchange between ecosystems and the atmosphere was also investigated using long-term CO2 flux data over various ecosystems in Japan and in Asia. In addition, a terrestrial biosphere model was upgraded to consider nitrogen cycling processes based on the observed data from various ecosystems. The model successfully simulated the seasonal patterns of C/N ratio in the canopy leaves as well as the ecosystem carbon budget. The carbon and nitrogen budgets in terrestrial ecosystems around Japan were estimated by the model with a spatial resolution of 1km, and the temporal and spatial variations were analyzed in the viewpoint of responses of ecosystems to the changes in the atmospheric nitrogen deposition.

以日本某森林生态系统为研究对象，进行了温度和氮调控实验，了解生态系统功能和结构对温度和氮沉降变化的响应。还利用日本和亚洲各种生态系统的长期二氧化碳通量数据，研究了生态系统与大气之间二氧化碳交换的环境控制。此外，基于不同生态系统的观测数据，对陆地生物圈模型进行了升级，以考虑氮循环过程。该模型成功地模拟了林冠叶片碳氮比的季节变化规律和生态系统碳收支。利用空间分辨率为1km的模型估算了日本周边陆地生态系统的碳氮收支，并从生态系统对大气氮沉降变化的响应角度分析了其时空变化。

项目成果

Assessing the use of camera-based indices for characterizing canopy phenology in relation to gross primary production in a deciduous broad-leaved and an evergreen coniferous forest in Japan

• DOI: 10.1016/j.ecoinf.2012.05.001
• 发表时间: 2012-09
• 期刊: Ecol. Informatics
• 作者: T. Saitoh;S. Nagai;N. Saigusa;Hideki Kobayashi;R. Suzuki;K. Nasahara;H. Muraoka

Flux tower measurement for 20 years at Takayama

高山磁通塔测量 20 年

• 发表时间: 2013
• 作者: 近藤 裕昭;山本 晋;村山 昌平;三枝 信子;斎藤琢;玉川一郎;前田 高尚;石戸谷 重之
• 通讯作者: 石戸谷 重之

ハイパースペクトルデータを用いた樹木葉形質の非破壊推定

使用高光谱数据无损评估树叶性状

• 发表时间: 2013
• 作者: 中路達郎;小熊宏之，日浦 勉
• 通讯作者: 小熊宏之，日浦 勉

Spectral vegetation indices as the indicator of canopy photosynthetic productivity in a deciduous broadleaf forest

• DOI: 10.1093/jpe/rts037
• 发表时间: 2013-10
• 期刊: Journal of Plant Ecology
• 影响因子: 2.7
• 作者: H. Muraoka;H. Noda;S. Nagai;T. Motohka;T. Saitoh;K. Nasahara;N. Saigusa

陸域観測サイト・ネットワークの連携による生態系-大気間の温室効果気体および反応性気体の交換過程の研究

通过地面观测站网络协作研究生态系统与大气之间温室气体和活性气体的交换过程

• 发表时间: 2012
• 作者: 三枝信子;ほか
• 通讯作者: ほか