北太平洋における海洋大気中の鉄含有粒子: 水溶性物質との混合状態
- 標題
- 北太平洋における海洋大気中の鉄含有粒子: 水溶性物質との混合状態
- 作者
- 三木 裕介, 上田 紗也子, 三浦 和彦, 古谷 浩志, 植松 光夫
- 文件屬性
- 日本研究
- 知識分類
- 基礎研究
- 出版年
- 2014
- 刊名
- エアロゾル研究
- 卷
- 29
- 期
- 2
- 頁
- p. 104-111
- 點閱數
- 2520
摘要
Iron (Fe) is an essential element for marine phytoplankton growth. Long-range transport of atmospheric aerosols from the continent and subsequent deposition is an important process to supply Fe to the ocean. The mixing states with water-soluble materials are the significant factor for the dry and wet depositions of aerosol particles. In this study, we focused on water-insoluble Fe-containing particles and clarified the mixing states with water-soluble materials. We collected aerosol particles on the R/V Hakuho Maru in the mid-latitude over the North Pacific Ocean. Collected particles were analyzed using a transmission electron microscopy with a water dialysis method and an energy-dispersive X-ray (EDX) analysis. Particles larger than 0.5 μm in diameter during a dust event and no dust events (maritime and continental sample) were analyzed. The number fractions of water-insoluble material containing particles to total analyzed particles were 10% (maritime), 20% (continental) and 30% (dust event), respectively. Most of water-insoluble materials were mixed with water-soluble materials. Based on EDX analyses of water-insoluble materials in analyzed 3 samples, water-insoluble Fe-containing particles were found with other mineral components (Si or Al) and the number fractions of Fe-containing particles to total analyzed particles were 2% (maritime), 2% (continental) and 8% (dust events), respectively.