Study on atmosphere-ocean interaction through marine biogehic sulfur compounds (dimethylsulfide)

海洋生物硫化合物（二甲硫醚）的大气-海洋相互作用研究

• 批准号: 13480156
• 负责人: MASUZAWA Toshiyuki
• 金额: $ 5.76万
• 依托单位: Graduate School of Environmental Studies, Nagoya university
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13480156/
• 关键词: dimethyl sulfide; sulfur compounds; marine phytoplankton; sulfur cycle; marine biosphere and atmospheric aerosol; 硫化ジメチル(DMS)

With support of this grant-in-aid, we performed following terms ; (1) development of automatic measurement system of atmospheric DMS, (2) measurement of DMS in the seawater and atmosphere over the western North Pacific in spring and winter, (3) setting up an observation station at Hachijojima Island to obtain time series of atmospheric DMS. In addition, analysis of transport pathway of air parcel by an isentropic trajectory Analysis was also performed, and we analyzed aerosol chemical compositions to detect the Kosa particle and oxidation products of DMS in the marine air. Moreover to obtain the distribution of chlorophyll-a in this area, remote sensing chlorophyll-a data derived from SeaWiPs satellite was analyzed.Sea-air DMS flux was estimated with DMS concentrations in the surface seawater and atmosphere, SST and surface wind speed. Relationship between sea-air DMS flux and atmospheric DMS abundance was analyzed.As a result of analysis, seawater DMS in spring was higher than in December by a factor of 1.5〜2 in this area. Chlorophyll-a concentration derived from SeaWiES was also higher in April than in December. These results were due to an increase of marine production in spring. In addition, high MSA and non sea-salt sulfate concentrations in aerosol were observed when air parcel was transported from the elevated chlorophyll-a area within 1〜2 days. According to column model approach, these elevated concentrations in aerosol were mainly due to the, high emission of DMS in the elevated chlorophyll-a area and rapid oxidation of DMS under the high ozone condition. Although Kosa events were observed in these observations, we did not succeed getting enough data to show any sign of impact of Kosa on marine production.

在这笔赠款的支持下，我们开展了以下工作：(1)开发大气DMS自动测量系统；(2)测量北太平洋西部春季和冬季海水和大气中的DMS；(3)在八路岛建立一个观测站，以获得大气DMS的时间序列。此外，还利用等熵轨迹分析方法对气团的输送路径进行了分析，并对气溶胶的化学成分进行了分析，以检测海洋空气中的KOSA颗粒和DMS的氧化产物。此外，利用SeaWiPS卫星获取的叶绿素a遥感数据，利用表层海水和大气中DMS浓度、海温和地面风速估算了海气DMS通量，以获得该地区的叶绿素a分布。分析了海气DMS通量与大气DMS丰度的关系，结果表明，该区春季海水DMS比12月份高1.5~2倍。从SeaWiES得到的叶绿素-a浓度在4月份也高于12月份。这些结果是由于春季海洋产量增加所致。此外，在1~2天内，从高叶绿素a区输送来的气溶胶中有较高的MSA和非海盐硫酸盐浓度。根据柱模型方法，这些气溶胶浓度的升高主要是由于在高臭氧条件下，DMS在叶绿素a高值区的高排放和DMS的快速氧化。尽管在这些观测中观察到了KOSA事件，但我们没有成功地获得足够的数据来显示KOSA对海洋生产的任何影响的迹象。

项目成果

Nakatsuka, T, Masuzawa, J., Kanda, H., Kitazato, Y., Shirayama, M.: "Particle dynamics in the deep water column of Sagami Bay, Japan I : Origins of apparent flux of sinking particles"Progress Oceanography. 57. 3-16 (2003)

Nakatsuka, T, Masuzawa, J., Kanda, H., Kitazato, Y., Shirayyama, M.：“日本相模湾深水柱中的粒子动力学 I：下沉粒子表观通量的起源”海洋学进展。

Nakatsuka, T., Masuzawa, T., Kanda, J., Kitazato, H., Shirayama, Y., Shimanaga, M., Yamaoka, Y.: "Particle dynamics in the deep water column of Sagami Bay, Japan I: Origins of apparent flux of sinking particles"Progress Oceanography. Vol.57. 3-16 (2003)

Nakatsuka, T.、Masuzawa, T.、Kanda, J.、Kitazato, H.、Shirayama, Y.、Shimanaga, M.、Yamaoka, Y.：“日本相模湾深水柱中的粒子动力学 I：

Nakatsuka, T, Masuzawa, J.Kanda, H.Kitazato, Y.Shirayama, M.Shimanaga, Y.Yamaoka: "Particle dynamics in the deep water column of Sagami Bay, Japan I : Origins of apparent flux of sinking particles"Progress Oceanography. 57. 3-16 (2003)

Nakatsuka, T, Masuzawa, J.Kanda, H.Kitazato, Y.Shirayama, M.Shimanaga, Y.Yamaoka：“日本相模湾深水柱中的粒子动力学 I：下沉粒子表观通量的起源”进展

Masuzawa, T et al.: "Temporal variations in mass fluxes and their major components of sinking particles in Sagami Bay off Japan"Progress Oceanography. 57. 59-75 (2003)

Masuzawa, T 等人：“日本相模湾质量通量的时间变化及其下沉颗粒的主要成分”海洋学进展。

Masuzawa, T et al.: "Temporal variations in mass fluxes and their major components of sinking particles in Sagami Bay off Japan"Progress Oceanograph. 57. 59-75 (2003)

Masuzawa, T 等人：“日本相模湾质量通量的时间变化及其下沉颗粒的主要成分”海洋学进展。