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Ecosystem and Oceanographic Structure in the Indian Sector of the Antarctic Ocean

南极洋印度区的生态系统和海洋结构

基本信息

批准号：
14255012
负责人：
ISHIMARU Takashi
金额：
$ 25.21万
依托单位：
Tokyo University of Marine Science and Technology (2004-2005)東京水産大学 (2002-2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14255012/
关键词：
Southern Ocean Indian Sector Marine ecosystem Oceanographic structure Primary production Plankton Iron

项目摘要

Three cruises by T/V Umitaka-Maru were conducted in the Indian sector of the Antaractic Ocean in 2002/03, 2004/05, 2005/06 austral summer. Survey areas were the eastern shelf of Keruguelen plateau and off Wilkes Land, off Lutzow-Holm Bay and off Wilkes Land and off Luzow-Holm Bay, respectively. Main themes were the circulation of deep water formed off Adelie Land, the relationships between surface ecosystems and physical and chemical environments and the relationships between surface ecosystems and mesopelagic ecosystems. Hydrographic observations were conducted by using ship mount ADCP, CTD and LADCP, and seawater was sampled from various depths for macro-nutrient and trace metal analyses. Bio-optical observations, measurements of primary production and collections of surface phytoplankton and zooplankton by a plankton net and mesopelagic organisms by a multiple opening/closing trawl were also conducted. Aerosol observations were carried out off Luzow-Holm Bay, coincide with those fro … More m the Showa Station. A Continuous Plankton Recorder was towed during cruising from each port to observation area for the study on the long term change of surface plankton communities in combination with samples collected by R/V Aurora Australis and R/V Shirase.Until now, papers on following topics have been published : on the pathway and volume of deepwater formed off Adelie Land ; on the remote sensing observations of eddies and annual variability of chlorophyll and sea-ice around the Antarctic Divergence ; on the parameters for precise estimation of Antarctic Krill biomass by quantitative echo-sounder. Inter-annual changes in community composition and biomass of zooplankton along 140゜E meridian related to the development of the Antarctic Divergence and the meander of the Antarctic Circumpolar Current were elucidated and some of the results will be submitted soon. Analyses of trace metals, aerosols and photosynthetic pigments are still undergoing. Mesopelagic organisms have been sorted into major taxa and detailed studies are also still undergoing. Less

2002/03年、2004/05年、2005/06年夏季，Umitaka-Maru号轮船在南冰洋的印度部分进行了三次巡航。调查区域分别是Keruguelen高原东部陆架和Wilkes陆地附近、Lutzow-Holm海湾附近和Wilkes陆地附近和Luzow-Holm海湾附近。主要主题是阿德利近海形成的深水循环、表层生态系统与物理和化学环境之间的关系以及表层生态系统与中层生态系统之间的关系。利用ADCP、CTD和LADCP进行水文观测，并从不同深度采集海水进行常量营养分析和痕量金属分析。还进行了生物光学观察，测量了浮游生物网对表层浮游植物和浮游动物的初级生产量和对浮游动物的采集，以及多次开闭拖网对中上层生物的采集。气溶胶观测是在吕佐-霍尔姆湾附近进行的，与…的观测结果一致更多的是昭和车站。在从每个港口到观测区的航行过程中，拖着一个连续的浮游生物记录仪，结合R/V南极光和R/V Shirase采集的样本，研究表层浮游生物群落的长期变化。到目前为止，已经发表了以下主题的论文：阿德利陆地附近形成的深水的路径和体积；南极散度区周围叶绿素和海冰的涡动和年变化的遥感观测；定量回声测深仪精确估计南极磷虾生物量的参数。阐明了140゜E子午线浮游动物群落组成和生物量的年际变化与南极辐散的发展和南极绕极流的曲折有关，部分结果即将公布。对微量金属、气溶胶和光合色素的分析仍在进行中。中上层生物已被分类为主要的类群，详细的研究也仍在进行中。较少