Spatial Variation of Nitrogen Deposition to Experimental Forests and its Wet and Dry Deposition

试验林氮沉降空间变化及干湿沉降

• 批准号: 18510006
• 负责人: HARA Hiroshi
• 金额: $ 2.5万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18510006/
• 关键词: Acid Deposition; Atmospherie Environmental Chemistry; Wet Deposition; Dry Deposition; Nitrogen Compounds

The temporal and spatial variations of wet deposition of nitrate and ammonium ions were explored together with corresponding variables at three close stations, Tama, Fussa, and Hinohara, of Tokyo Metropolitan Government network. No significant temporal variations were discernible for nitrate or ammonium concentration. Volume-weighted monthly mean concentrations, however, were 42.8 and 38.2μ mol L-1 for nitrate and ammonium, respectively, which were significantly higher than those of Tokyo results by factors of 1.6 to 1.9 and 1.5 to 2.1. Particularly nitrate concentration is surely higher than that at Tama station. A recent intensive field measurement of nitrogen oxides and ozone in this experimental station shows that nitrogen oxide, NO, reached zero during night time, which might enhance nitrate species formation from N205 because ozone reacts with NO2 to form NO3 radical. Wet deposition of nitrate and ammonium ions at Tama was in the top 30% of the deposition in Japan. An observational tower was intended to construct for the dry deposition studies. Although the studies with the use of the experimental tower were delayed because of some needed improvements, preliminary studies have developed into some routine measurements with the improved tower.

研究了东京都政府网三个邻近站点Tama、Fussa和Hinohara的硝酸盐和氨离子湿沉降的时间和空间变化以及相应的变量。硝酸盐或铵的浓度没有明显的时间变化。然而，按体积加权的月平均浓度分别为42.8molmolL-1和38.2molmolMol L-1，分别比东京的结果高出1.6%到1.9%和1.5%到2.1%。尤其是硝酸盐浓度肯定比多摩站高。最近在该实验站对氮氧化物和臭氧的密集野外测量表明，氮氧化物NO在夜间达到零，这可能会促进N205硝酸盐物种的形成，因为臭氧与NO2反应生成N3自由基。在日本，Tama的硝酸盐和氨离子的湿沉降量占总沉降量的30%以上。建造一座观测塔是为了进行干沉积研究。虽然使用实验塔的研究因一些需要改进的地方而被推迟，但初步研究已经发展为使用改进的塔的一些常规测量。

项目成果

Nitrogen Deposition on Cedar and Oak Leaves in the Tama Hills.

塔摩山雪松和橡树叶上的氮沉积。

• 发表时间: 2007
• 作者: M. Saito;et. al.
• 通讯作者: et. al.

Analyses of Meteorological Elements and Precipitation Chemistry at FM Tamakyuryo.

FM Tamakyuryo 的气象要素和降水化学分析。

• 发表时间: 2008
• 期刊: Journal of Field Science 7
• 作者: K.;Shinozaki;et. al.
• 通讯作者: et. al.

広域における窒素循環-評価の現状と今後の展望-

广域氮循环-评价现状及未来展望-

• 发表时间: 2006
• 期刊: 日本土壌肥料学雑誌 77巻3号
• 作者: 木村園子ドロテア;岡崎正規;波多野隆介
• 通讯作者: 波多野隆介

FM多摩丘陵における気象要素と窒素沈着量の経年に変化

FM Tama Hills 气象因素和氮沉降随时间的变化

• 发表时间: 2007
• 作者: 篠崎孝一;ほか
• 通讯作者: ほか

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄