Arctic Gakkel Vents (AGAVE) 2007 - Meteorological, Oceanographic and Ship Data Collected Onboard Icebreaker Oden

AGAVE was a US-financed project where scientists explored life in the hydrothermal vents from the core of the Earth, which has been found at the Gakkel Ridge, a mountain ridge below the Arctic Ocean. The expedition was an International Polar Year (IPY) collaboration between scientists from the USA, Sweden, Germany and Japan. The AGAVE expedition made a number of exciting discoveries on the Gakkel Ridge, and one of the most surprising was the fact that the axial valley at the 85°E segment is blanketed in pyroclastic deposits - the largest unconsolidated deposits ever found on the seafloor (picture 4). These deposits are caused by explosive volcanic eruptions, which many scientists had assumed were impossible in the deep ocean because of the great pressures at such depths. The AGAVE observations turn this idea upside down, and demonstrate that volcanic activity at the 85°E site has been accompanied by the catastrophic discharge of magmatic volatiles. These pyroclastic deposits are being analyzed to determine their age and composition in order to better understand this surprising result. The deposits were found around a previously unknown chain of volcanoes, which were named the Asgard Chain - Oden, Thor, and Loke, in honor of the outstanding scientific support provided by the officers and crew of IB Oden. Purpose: The AGAVE expedition had two sets of complimentary objectives. The scientific objective was to study the geological, chemical, and biological characteristics of volcanic activity and hydrothermal venting on the Gakkel Ridge. The engineering objective was to develop new technologies for deep-sea research in ice-covered oceans. This data set contains meteorological, oceanographic and ship data collected during the US-Swedish expedition Arctic Gakkel Vents (AGAVE), which was an international research cruise using the icebreaker Oden in the Arctic Ocean. Data includes: meteorological variables: Air temperature, Humidity, Wind direction/speed, Atmospheric pressure. Oceanographic variables: Sea water temperature, Conductivity, Salinity and Sound velocity. Ship data: Position, Speed, Course, Water depth. Further metadata on instrumentation and the individual variables can be found in the info file. Graphics and files describing the route are included in the package. Quality Information: Obviously erroneous data (e.g. negative air pressure) have been omitted. No other processing or quality check of the data has been undertaken. Users should be aware of this in further data handling and analysis.AGAVE是一项由美国资助的科研项目，科学家借此探索地球核心区域的热液喷口生命活动，这些热液喷口发现于北冰洋下方的加克海岭（Gakkel Ridge）。 该考察是国际极地年（International Polar Year, IPY）的合作项目，参与方包括来自美国、瑞典、德国和日本的科研人员。 AGAVE考察队在加克海岭取得了多项突破性发现，其中最令人意外的成果之一是，85°E段的轴谷被火山碎屑沉积（pyroclastic deposits）所覆盖——这是迄今在海底发现的规模最大的未固结沉积层（图4）。这些沉积层由爆炸性火山喷发形成，此前许多科学家认为，由于深海极高的水压，深海中不可能发生此类喷发。AGAVE的观测结果颠覆了这一认知，并证实85°E区域的火山活动伴随有岩浆挥发物的灾难性释放。研究团队正对这些火山碎屑沉积层进行年代与成分分析，以深入解析这一意外发现。该沉积层发现于一处此前未被记录的火山链周边，该火山链被命名为阿斯加德海岭（Asgard Chain），包含奥登（Oden）、索尔（Thor）与洛基（Loke）三座火山，以此致敬IB奥登号（IB Oden）船员与舰员提供的卓越科研支持。 研究目标： AGAVE考察队设有两大互补性研究目标。科学目标为探究加克海岭的火山活动与热液喷口的地质、化学及生物学特征；工程目标则是研发适用于冰覆盖海域的深海研究新技术。 本数据集包含美瑞联合考察队“北极加克喷口（Arctic Gakkel Vents, AGAVE）”科考航次所收集的气象、海洋学及船舶数据，本次科考为北冰洋上使用破冰船奥登号（Oden）开展的国际研究巡航。 数据涵盖： 气象变量：气温、湿度、风向/风速、大气压强。 海洋学变量：海水温度、电导率、盐度与声速。 船舶数据：位置、航速、航向、水深。 关于仪器设备与各变量的详细元数据可参阅说明文件。数据包中还包含航线相关图表与文件。 质量说明： 显然存在错误的数据（如负气压值）已被剔除，未对其余数据进行额外处理或质量校验。使用者在后续数据处理与分析中需注意这一点。