Physical oceaongraphy and hydrochemistry measured on water bottle samples during METEOR cruise M84/3 in 2001

Here we report on data from an oceanographic cruise on the German research vessel Meteor covering large parts of the Mediterranean Sea during spring of 2011. The main objective of this cruise was to conduct measurements of physical, chemical and biological variables on a section across the Mediterranean Sea with the goal of producing a synoptic picture of the distribution of relevant physical and biogeochemical properties, in order to compare those to historic data sets. During the cruise, a comprehensive data set of relevant variables following the guide lines for repeat hydrography outlined by the GO-SHIP group (http://www.go-ship.org/) was collected. The measurements include salinity and temperature (CTD), an over-determined carbonate system, inorganic nutrients, oxygen, transient tracers (CFC-12, SF6), helium isotopes and tritium, and carbon isotopes. The cruise sampled all major basins of the Mediterranean Sea following roughly an east-to-west section from the coast of Lebanon through to the Strait of Gibraltar, and to the coast of Portugal. Also a south-to-north section from the Ionian Sea to the Adriatic Sea was carried out. Additionally, sampling in the Aegean, Adriatic and Tyrrhenian Seas were carried out. The sections roughly followed lines and positions that have been sampled previously during other programs, thus providing the opportunity for comparative investigations of the temporal development of various parameters.

本研究报道了2011年春季德国“流星号”（Meteor）科考船在地中海大部分海域开展的海洋科考航次所获取的数据。本次航次的核心目标为横跨地中海布设断面，开展物理、化学与生物变量的原位观测，以获取相关物理及生物地球化学特性分布的同步概貌，并将其与历史数据集进行对比分析。航次期间，研究团队按照全球海洋船载水文调查小组（GO-SHIP，http://www.go-ship.org/）制定的重复水文调查规范，收集了涵盖相关变量的完整数据集。观测内容包括盐度与温度（CTD，Conductivity, Temperature, Depth）测定、超定碳酸盐体系分析、无机营养盐、溶解氧、瞬态示踪剂（CFC-12、SF6）、氦同位素与氚，以及碳同位素测定。本航次覆盖地中海全部主要海盆，布设了大致自东向西的断面：从黎巴嫩海岸出发，途经直布罗陀海峡，最终抵达葡萄牙海岸；同时还开展了自爱奥尼亚海至亚得里亚海的南北向断面观测。此外，研究团队还在爱琴海、亚得里亚海及第勒尼安海开展了采样工作。本次布设的断面与此前其他科考项目的采样航线及站位大致重合，因此可为开展各类参数的时间演变对比研究提供条件。