Physical and biogeochemical dynamics of the subantarctic zone

This metadata record is a 'Parent' metadata record for ASAC project 2720. See the link for the related 'Child' metadata records.

The overall objective is to characterise Southern Ocean marine ecosystems, their influence on carbon dioxide exchange with the atmosphere and the deep ocean, and their sensitivity to past and future global change including climate warming, ocean stratification, and ocean acidification from anthropogenic CO2 emissions. In particular we plan to take advantage of naturally-occurring, persistent, zonal variations in Southern Ocean primary production and biomass in the Australian Sector to investigate the effects of iron addition from natural sources, and CO2 addition from anthropogenic sources, on Southern Ocean plankton communities of differing initial structure and composition.

SAZ-SENSE is a study of the sensitivity of Sub-Antarctic Zone waters to global change. A 32-day oceanographic voyage onboard Australia's ice-breaker Aurora Australis was undertaken in mid-summer (Jan 17 - Feb. 20) 2007 to examine microbial ecosystem structure and biogeochemical processes in SAZ waters west and east of Tasmania, and also in the Polar Frontal Zone south of the SAZ.

The voyage brought together research teams from Australasia, Europe, and North America, and was led by the ACE CRC, CSIRO Marine and Atmospheric Research, and the Australian Antarctic Division.

The overall goal is to understand the controls on Sub-Antarctic Zone productivity and carbon cycling, and to assess their sensitivity to climate change. The strategy is to compare low productivity waters west of Tasmania (areas with little phytoplankton) with higher productivity waters to the east, with a focus on the role of iron as a limiting micro-nutrient. The study also seeks to examine the effect of rising CO2 levels on phytoplankton - both via regional intercomparisons and incubation experiments.

Available for download from this metadata record are various datasets collected from the voyage:

- An image showing a map of the cruise track.
- An excel document detailing hourly position checks of the ship.
- An excel document detailing the event log for the voyage.
- A word document detailing prospective papers produced from the voyage.

Finally a link is available for users to access the special volume of publications produced as a result of this voyage.

本元数据记录为ASAC项目2720的「父级」元数据记录，相关「子级」元数据记录请参阅对应链接。

本项目的总体目标是表征南大洋（Southern Ocean）海洋生态系统的特征，阐明其与大气及深海之间的二氧化碳交换过程，并分析其对过去及未来全球变化的响应敏感性，其中全球变化涵盖气候变暖、海洋层化以及人为二氧化碳排放引发的海洋酸化。具体而言，研究团队将依托澳大利亚海域内南大洋初级生产力与生物量自然存在的持续性纬向差异，探究天然来源铁输入及人为来源二氧化碳输入对初始结构与组成各异的南大洋浮游生物（plankton）群落的影响。

SAZ-SENSE项目聚焦亚南极带（Sub-Antarctic Zone, SAZ）水域对全球变化的敏感性。2007年仲夏（1月17日至2月20日），研究团队搭乘澳大利亚破冰船「极光号（Aurora Australis）」开展了为期32天的海洋学考察航次，旨在探究塔斯马尼亚岛东西两侧亚南极带水域以及亚南极带以南极锋带（Polar Frontal Zone）的微生物生态系统结构与生物地球化学（biogeochemical）过程。

本次航次汇聚了来自澳大拉西亚、欧洲及北美的科研团队，由南极合作研究中心（ACE CRC）、澳大利亚联邦科学与工业研究组织海洋与大气研究部（CSIRO Marine and Atmospheric Research）以及澳大利亚南极分部主导实施。

本项目的总体目标是明晰亚南极带生产力与碳循环的调控机制，并评估其对气候变化的敏感性。研究策略为对比塔斯马尼亚西侧低生产力水域（浮游植物丰度较低区域）与东侧高生产力水域的差异，重点关注铁作为限制性微量营养元素的作用；同时，研究还将通过区域间对比与培养实验，探究二氧化碳浓度上升对浮游植物的影响。

本元数据记录可下载本次航次采集的多类数据集：
- 展示航迹地图的图像文件
- 记录船舶每小时位置核查情况的Excel文档
- 记录航次事件日志的Excel文档
- 记录航次产出预期论文的Word文档

此外，用户可通过专属链接获取本次航次相关的特刊出版物。