Coccolithophore species fluxes in the Australian and New Zealand sectors of the Subantarctic Zone

Coccolithophore fluxes were investigated over a one-year period at two sites of the Subantarctic Zone in the Australian and New Zealand Sectors of the Southern Ocean. The samples from the Australian SAZ were retrieved at the SOTS observatory, which lies in the SAZ (near 47°S, 142°E), approximately 500 km south west of Tasmania. SOTS was instrumented with three moored platforms: (i) a surface tower buoy that performs meteorological measurements (the Southern Ocean Flux Station - SOFS); (ii) a surface mixed layer mooring equipped with an automated water sampler) and nutrient, carbon and biological measurement sensors (the Pulse mooring); and (iii) a bottom-tethered deep sediment trap mooring that collects sinking particle fluxes for diverse biogeochemical studies (the SAZ mooring). The samples from New Zealand came from the deep-ocean SAM mooring deployed in Subantarctic waters south east of New Zealand (46°40’S, 178’ 30°E), and was equipped with sediment traps and a suite of sensors. Here, we report the coccolith sinking assemblages captured by sediment traps at ~1000, 2000 and 3800 m depth for a year from August 2011 until July 2012 at the SOTS observatory and a sediment trap at ~1500 m depth for a year from November 2009 until October 2010 at the SAM site. A description of the field experiment, sample treatment, determination of total CaCO3 content, and estimation of coccolith and coccosphere fluxes can be found in Rigual-Hernández et al. (2020a) and Rigual-Hernández et al. (2020b). Data available: two excel files (one for each station) containing sampling dates and depths, relative abundance of coccolith sinking assemblages, and coccolith, coccosphere and total CaCO3 fluxes. Detailed information of the column headings is provided below.Cup – Cup (=sample) numberDepth – vertical location of the sediment trap in meters below the surface Mid-point date - Mid date of the sampling intervalDuration (days) – number of days the cup was open

球石藻通量在南大洋澳大利亚和新西兰扇区亚南极带的两个站点进行了为期一年的调查。澳大利亚亚南极带（SAZ）的样本取自SOTS观测站，该观测站位于亚南极带（约南纬47°、东经142°），在塔斯马尼亚岛西南约500公里处。SOTS配备了三个系泊平台：(i) 一个表面塔式浮标，用于开展气象测量（南大洋通量站——SOFS）；(ii) 一个表层混合层系泊设备，配备自动水样采集器以及营养盐、碳和生物测量传感器；(iii) 一个底部系泊的深层沉积物捕获器平台，用于收集沉降颗粒通量以开展多种生物地球化学研究（亚南极带系泊站）。新西兰站点的样本来自部署在新西兰东南亚南极水域（南纬46°40′、东经178°30′）的深海SAM系泊设备，该设备配备了沉积物捕获器和一套传感器。本研究报告了2011年8月至2012年7月期间，SOTS观测站深度约1000米、2000米和3800米处沉积物捕获器捕获的球石藻沉降组合，以及2009年11月至2010年10月期间，SAM站点深度约1500米处沉积物捕获器捕获的球石藻沉降组合，两者的观测周期均为一年。

关于野外实验、样本处理、总碳酸钙含量测定以及球石藻和球石球通量估算的描述可参见Rigual-Hernández等人（2020a）和Rigual-Hernández等人（2020b）。

可用数据：两个Excel文件（每个站点一个），包含采样日期和深度、球石藻沉降组合的相对丰度，以及球石藻、球石球和总碳酸钙通量。

列标题的详细信息如下：

Cup——杯号（=样本编号）
Depth——沉积物捕获器的垂直位置（单位：米，海面以下）
Mid-point date——采样间隔的中间日期
Duration (days)——杯体开启的天数