Clarification of Antarctic Bottom Water circulation in the Indian sector of Antarctic, particularly direct observation of its meridionall volume transport

澄清南极印度段的南极底水循环，特别是对其经向体积输送的直接观测

• 批准号: 14403006
• 负责人: WAKATSUCHI Masaaki
• 金额: $ 8.45万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14403006/
• 关键词: Antarctic Bottom Water; Southern Ocean; Ocean Circulation; Meridional Volume Transport; Coastal Polynya; Western Boundary Current; 深層循環; 南極海インド洋セクター; 世界の気候; 西岸境界流; 熱塩輸送; Antarctic Bottom Water; Southern Ocean; Ocean Circulation; Meridional Volume Transport; Coastal Polynya; Western Boundary Current; 深層循環; 南極海インド洋セクター; 世界の気候; 西岸境界流; 熱塩輸送

The Southern Ocean plays an important role on global climate through the directl heat and mass connections with Pacific Ocean, Atlantic Ocean and Indian Ocean. Especially, it is well known that the Antarctic Ocean is the largest seasonal sea ice zone in the world and produces the Antarctic Bottom Water (AABW) which is one of sources for general deep ocean circulation. In spite of its importance in earth sciences, there is very few direct observation for the meridional volume transport of AABW and its seasonal variations. It is widely believed that the AABW is produced in three coastal regions in the Weddell Sea, Ross Sea and off the Adelie coast. Recently, observational plans on the AABW formation are preceeded to have in the Weddell and Ross Seas by US and Europian oceanographers.The purpose of this study is to quantitatively evaluate the meridional volume transport of AABW (hereafter called to the Adelie AABW) which should be produced in the coastal polynyas off the Adelie coast by direct observations through a joint program with CSIRO in Australia. A recent result of numerical simulation on global ocean circulation suggests that the Adelie AABW may be the important source of Pacific and Indian Ocean deep water. We have deployed mooring systems with about 30 current meters and CT meters at 8 stations east of the Kerguelen Plateau for two years from February 2003 to February 2005, to observe the meridional volume transport of Adelie AABW as a werstern boundary current and its seasonal variations. We could successfully recover all the current and CT instrument mooring systems. We have now numerous valuable data. Since we fortunately could obtain a new research fund on ou study of the Adelie AABW formation, we are planning to progress analyzes of numerous and valuable data and would like to evaluate the meridional heat and volume transport of the Adelie AABW and its seasonal variability quantitatively.

南部海洋通过与太平洋，大西洋和印度洋的直接热量和大规模联系在全球气候中起着重要作用。尤其是，众所周知，南极海洋是世界上最大的季节性海冰区，并生产南极底水（AABW），这是一般深海循环的来源之一。尽管它在地球科学中的重要性，但对于AABW的子午体积运输及其季节性变化，几乎没有直接观察。人们普遍认为，AABW是在韦德尔海，罗斯海和阿德利沿岸的三个沿海地区生产的。最近，我们和欧洲海洋学家在Weddell和Ross海中进行了观察计划。这项研究的目的是定量评估AABW的子午线运输（以下称为Adelie AABW），应通过与Adelie Coast进行澳大利亚沿海地区的沿海沿海地区的coss coss cose，并与Adelie Coast进行coasterations，并通过与Adelie Coast进行直接观察。关于全球海洋循环的数值模拟的最新结果表明，Adelie AABW可能是太平洋和印度洋深水的重要来源。从2003年2月到2005年2月，我们已经在Kerguelen高原以东8个站点部署了约30米和CT米的系泊系统，以观察Adelie Aabw作为Wersern Bourdare Current及其季节性变体的子午线运输。我们可以成功恢复所有当前和CT仪器系泊系统。我们现在有许多有价值的数据。由于幸运的是，我们可以获得有关Adelie AABW组的OU研究的新研究基金，因此我们计划对众多且有价值的数据进行分析，并希望评估Adelie AABW及其季节性变异性的子午热和体积运输。