ADBEX I cruise to the Prydz Bay region, 1982: nutrient data

From the abstract and introduction of ANARE Research Notes 44 - ADBEX I cruise to the Prydz Bay region, 1982: nutrient data.Nitrate, phosphate and silicate concentrations obtained during the ADBEX I cruise to the Prydz Bay region in November and December 1982 are plotted with depth and the raw data are tabulated. Location of the sampling stations and the average concentration of each nutrient in the top 100 m of the water column is mapped.The ADBEX I (Antarctic Division BIOMASS Experiment) cruise is part of a long-term, national program of field surveys aimed at fulfilling the objectives of the BIOMASS (Biological Investigation of Marine Antarctic Systems and Stocks) program. The ADBEX I cruise on MV Nella Dan to the Prydz Bay region between 19 November and 17 December 1982, is the second Antarctic Division cruise to contribute to BIOMASS, the first being FIBEX (First International Biomass Experiment) in 1981.Nutrient data were collected at twenty-eight of the seventy-nine hydrographic stations to provide information for the interpretation of phytoplankton distribution and abundance. The sampling locations and depths were not selected, therefore, on the basis of nutrient-related considerations.The concentration of nitrate, phosphate and silicate is plotted to 600 m for each station and where casts were much deeper or much shallower, a second plot is shown. To show water column structure at the time of sampling, sigma-t values were also plotted, unless data for a cast were unavailable. In addition to the depth profiles, the average concentration to 100 m of each nutrient species is mapped to give a first-order approximation of the horizontal pattern of nutrient distribution in the upper layers.

本数据集源自1982年《澳大利亚国家南极研究局（Australian National Antarctic Research Expeditions, ANARE）研究纪要》第44期——1982年普里兹湾ADBEX I航次的摘要与引言：营养盐数据。
1982年11至12月普里兹湾ADBEX I航次所获取的硝酸盐、磷酸盐与硅酸盐浓度的深度分布数据已完成可视化绘图，原始数据均以表格形式收录。本数据集同时包含采样站位分布图，以及水柱上层100米内各营养盐的平均浓度空间分布图。

ADBEX I（南极局生物量实验，Antarctic Division BIOMASS Experiment）航次隶属于一项长期全国性野外调查计划，旨在达成BIOMASS（南极海洋生态系统与资源生物调查，Biological Investigation of Marine Antarctic Systems and Stocks）计划的相关目标。本次ADBEX I航次由“内拉丹号”（MV Nella Dan）执行，航行时间为1982年11月19日至12月17日，是南极局为推进BIOMASS计划开展的第二个航次，首个航次为1981年的FIBEX（首次国际生物量实验，First International Biomass Experiment）。

本次调查共布设79个水文站位，其中28个站位采集了营养盐数据，用于辅助阐释浮游植物的分布与丰度特征。采样站位与采样深度的布设并未优先考虑营养盐相关因素。

针对每个站位，均绘制了硝酸盐、磷酸盐与硅酸盐浓度至600米水深的垂直分布图；若某次水文观测剖面的实测水深远超或远浅于600米，则额外附设一张补充分布图。为直观呈现采样时的水柱结构特征，除非该观测剖面无有效数据，否则同时绘制了西格玛-t（sigma-t）值的垂直分布曲线。除垂直剖面数据外，本数据集还绘制了各营养盐在水柱上层0~100米的平均浓度空间分布图，以初步近似展示上层海域营养盐分布的水平格局。