ICHNUSSA 2015

the sampling plan of the ichnussa2015 proposes the route already covered in previous cruises since 2000 to acquire data for the activities of cal/val of oceanographic ecosystem or for the validation of forecasting numerical models at different spatial scales. then the aim is also to study the inter-annual variability of biogeochemical and physical properties of the water masses in crucial areas for understanding the circulation and exchange between basins, in particular the transport of heat and salt in the western mediterranean. in particular, we want to study the exchange between western and eastern mediterranean and the waters recirculating or formed in the algerian-provençal basin (like the new deep water in the gulf of lions) and along the transect sardinia-balearic islands. then we want to monitor characteristics and distribution of the new western mediterranean deep water and its possible effects on the general circulation of the mediterranean. the ichnussa2015 is designed to approximately replicate the stations of previous cruises like those named medgoos, medco or medoc and the most recent ichnussa2012 and 2013.ctd castsat every station, pressure (p), salinity (s), potential temperature (θ) dissolved oxygen concentration (do) and fluorescence were measured with a ctd-rosette system consisting of a ctd sbe 911 plus, and a general oceanics rosette with 24 niskin bottles (12 liters each). temperature measurements were performed with a sbe-3/f thermometer, with a resolution of 0.00015 °c/bit at -1 °c or 0.00018°c/bit at 31 °c, and conductivity measurements were performed with a sbe-4c sensor, with a resolution of 3 x 10-4 s/m. dissolved oxygen was measured with a sbe-43 sensor (resolution 4.3μm). the vertical profiles of all parameters were obtained by sampling the signals at 24 hz, with the ctd/rosette going down at a speed of 1 m/s. the data were processed on board, and the coarse errors were corrected thanks to the sampling and analyzing on board o f oxygen and salinity of the deepest station. the rosette is equipped with a sonar altimeter which intercept the bottom 70-50 meters before getting to it. the altimeter is used just for safety, to avoid the rosette to touch the bottom, and for more precision in measuring depth.oxygen and salinity determinationsalinity samples were collected, stored and analyzed with a guildline portasal salinometer, standardized with ipso standard 34.999 psu water and at controlled temperature. also dissolved oxygen samples were collected and analyzed with the winkler method,using a computer controlled potentiometric end-point titration procedure. samples were taken from the niskins bottle with the recommendedprecautions and following the winkler procedure.the dataset is provided as an odv txt file and has been processed in accordance to the seadatanet's data qc rules; for each station (66 station) the file contains the following parameters: depth, press, temp, psal, doxy and fluozz.

Ichthyo-Nausa2015的采样计划旨在沿自2000年以来已由前次航次覆盖的航线采集数据，以支持海洋生态系统活动之校准与验证，或验证不同空间尺度下的数值预报模型。此外，其研究目标还包括探讨关键区域水体生物地球化学和物理特性的年际变化，尤其是地中海西部海域的热量和盐分传输。具体而言，研究重点在于西部与东部地中海之间的交换，以及阿尔及利亚-普罗旺斯盆地内循环或形成的水体（如狮子湾的新深层水）以及撒丁岛至巴利阿里群岛断面。随后，我们将监测新地中海深层水的特征与分布，以及其对地中海整体环流可能产生的影响。Ichthyo-Nausa2015计划旨在尽可能复制先前航次如MedGOOS、MedCO或MedOC，以及最近的Ichthyo-Nausa2012和2013的站位。在每个站位，使用CTD-Rosette系统，由CTD SBE 911 Plus和24个Niskin瓶（每个12升）组成，测量了压力（P）、盐度（S）、潜在温度（θ）、溶解氧浓度（DO）和荧光。温度测量采用SBE-3/f温度计，分辨率为-1°C时0.00015°C/bit或31°C时0.00018°C/bit，电导率测量使用SBE-4c传感器，分辨率为3 x 10-4 s/m。溶解氧使用SBE-43传感器测量（分辨率4.3μm）。通过以24Hz的采样频率，以1m/s的速度下潜，获取了所有参数的垂直剖面。数据在船上处理，并通过在最深站位对氧气和盐度进行采样和分析，校正了粗大误差。Rosette配备有测深仪，可在触底前70-50米拦截底部，该测深仪仅用于安全，避免Rosette触碰底部，并在测量深度时提供更高的精度。盐度样品采用Guildline Portasal盐度计收集、存储和分析，以IPSO标准34.999 psu水进行校准，并在控制温度下进行。同时，溶解氧样品也采用Winkler方法收集和分析，使用计算机控制的电位滴定终点滴定程序。样品采用推荐的预防措施，并遵循Winkler程序从Niskin瓶中取出。数据集以ODV txt文件格式提供，并按照SeaDataNet的数据质量控制规则进行处理；对于每个站位（共66个站位），文件包含以下参数：深度、压力、温度、盐度、溶解氧和荧光。