AMAZOMIX cruise - Physical datasets

physical data associated with the amazomix cruise. the amazon shelf encompasses a variety of physical processes, such as fluvial inputs, coastal currents, mesoscale, filaments, tides, internal waves and upwelling, influencing nutrient concentrations, chlorophyll and suspended matter. they also affect energy, salt and heat balances; parameters that condition physical/biogeochemical interactions and ecosystem functioning, from bacteria to plankton to fish resources. in particular, internal tidal waves are very energetic in this region. they impact biogeochemical cycles via the vertical mixture induced by their dissipation or vertical movements induced by their propagation. they thus allow a significant input of nutriments into the euphotic layer enhancing primary production, as observed on the surface from watercolour data. internal tidal waves could thus influence the biological pump and the carbon cycle. in addition, overall marine biodiversity of the region, from bacteria to fish is not well described. the connectivity of species in the tropical atlantic is also still an open question. the caribbean region is by far more bio-diverse than the brazilian one. one of the hypotheses is that the amazon plume, which can extend up to 3,000 km off the mouth, would constitute a barrier for some organisms. the amazon shelf is thus an ideal experimental laboratory to study the impact of physical processes on the structure and function of neritic and oceanic marine ecosystems.in this context, the objective of the multidisciplinary amazomix survey was to study the impact of the amazon river plume, internal tides and associated turbulent mixing, on marine ecosystem in contrasting regions off the amazon shelf. for that purpose, the multidisciplinary amazomix project brings together physicists, biogeochemists, bioopticians and biologists. the sampling strategy consists in the simultaneous acquisition of a comprehensive set of environmental and biological compartments, including micro-organisms (bacteria, phyto and zooplankton) and higher trophic levels (micronekton, demersal and pelagic fish). amazomix is the first campaign to develop this multi-disciplinary approach off the amazon shelf. in situ results will be analysed in interaction with digital tools and data, modelling (1/36°, with and without tides, 1/12° coupled) and satellite data analyses.this dataset contains the amazomix 2021 qualified measurements of - the hydrographic ctd-02 (netcdf and csv text files)- ship acoustic doppler current profilers (os 75 khz, netcdf and csv text files)- lowered acoustic doppler current profilers (wh300 downlooking and wh300 uplooking, netcdf and csv text files)- thermosalinometer (netcdf and csv text files)- vertical microstructure profile (vmp-250, binary file)

本数据集涉及亚马逊混合巡航的物理数据。亚马逊海域涵盖了多种物理过程，诸如河流输入、海岸流、中尺度过程、细丝状结构、潮汐、内部波动和上升流等，这些过程影响着营养盐浓度、叶绿素和悬浮物质的分布。它们同样影响能量、盐分和热量的平衡；这些参数调节着物理与生物地球化学相互作用以及生态系统功能的运行，从细菌到浮游生物再到鱼类资源。特别是，该区域的内部潮汐波能量极为充沛。它们通过其耗散或传播引起的垂直混合，影响生物地球化学循环。因此，它们允许大量的营养物质输入到光合层，从而增强初级生产，如从水色数据观测到的表层情况。内部潮汐波因此可能影响生物泵和碳循环。此外，从细菌到鱼类，该区域的海洋生物多样性尚未得到充分描述。热带大西洋中物种的连通性也是一个尚未解决的问题。加勒比地区在生物多样性方面远超巴西。一种假设是，亚马逊羽流，其可以延伸至河口3000公里之外，可能成为某些生物的障碍。因此，亚马逊海域是研究物理过程对近海和海洋生态系统结构与功能影响的理想实验实验室。在此背景下，多学科亚马逊混合调查旨在研究亚马逊河羽流、内部潮汐及其相关的湍流混合对亚马逊海域邻近区域海洋生态系统的影响。为此，多学科亚马逊混合项目汇集了物理学家、生物地球化学家、生物光学专家和生物学家。采样策略包括同时获取一套全面的生态环境和生物组成部分，包括微生物（细菌、植物和浮游动物）以及较高营养级（微型 nekton、底栖和浮游鱼类）。亚马逊混合是首个在亚马逊海域开展这一多学科方法的项目。现场结果将与数字工具和数据、模型（1/36°，含潮汐和不含潮汐，1/12°耦合）以及卫星数据分析相结合进行分析。本数据集包含亚马逊混合2021年合格的测量数据，包括水文CTD-02（NetCDF和CSV文本文件）、船舶声学多普勒流速剖面仪（OS 75 kHz，NetCDF和CSV文本文件）、下放式声学多普勒流速剖面仪（WH300向下观测和WH300向上观测，NetCDF和CSV文本文件）、温盐计（NetCDF和CSV文本文件）、垂直微结构剖面（VMP-250，二进制文件）。