Oxygen concentrations in sediment around buried oil quantified in a laboratory flume using oxygen-sensitive planar optodes

Oxygen concentration data from a flume experiment conducted on 26 November 2012. Quantitative interpretation of planar oxygen optode images was done using VisiSens AnalytiCal 1 software. The color coding reflects different oxygen concentrations. Blue colors are low oxygen, red and yellow high oxygen (black=no oxygen, white=100% airsaturation). Oxygen concentration data were calculated by VisiSens AnalytiCal 1 software from the calibrated planar optodes. The folders contain VisiSens oxygen sensing camera images positioned at 5 cm distances along the sidewall of the laboratory flume incubating sediment with tar balls, on 26-November 2012, at times: 8:33 when flow in the flume was initiated, 10:45 when flow continued, 15:11 when flow continued to oxygenate the sediment, 15:46 when flow was stopped in order to initiate oxygen depletion, 18:00 after deoxygenation of the sediment. Data include the calibrated oxygen pictures and associated folders with tables containing the calibrated values from the color coded oxygen pictures. The tables have 928 columns and 742 rows with each cell corresponding to one pixel on the associated image. An Excel "read me" file is provided that explains how the text file associated with each of the oxygen distribution pictures should be read. This Excel file can be used as a template for importing the txt files with the oxygen data. This dataset includes data funded under FIO Y1.x041.000:0004.

本数据集为2012年11月26日水槽（flume）实验获取的氧气浓度数据。采用VisiSens AnalytiCal 1软件对平面光学氧气传感器（planar oxygen optode）图像开展定量解译，图像以色标区分不同氧气浓度：蓝色代表低氧环境，红色与黄色代表高氧环境（黑色表示无氧状态，白色对应100%空气饱和氧浓度）。氧气浓度数据由VisiSens AnalytiCal 1软件基于校准后的平面光学氧气传感器图像计算得到。各文件夹内存储有2012年11月26日拍摄的VisiSens氧气传感相机图像：相机沿培养了附着焦油球沉积物的实验室水槽侧壁以5厘米间距布设，拍摄时间点分别为：8:33（启动水槽内水流时）、10:45（水流持续运行时）、15:11（水流持续为沉积物充氧时）、15:46（停止水流以启动氧气消耗过程时）、18:00（沉积物完成脱氧后）。数据集包含校准后的氧气分布图，以及配套的表格文件夹：每张表格含928列、742行，每个单元格对应关联图像上的一个像素，存储了色标式氧气图像的校准值。附带一份Excel格式的"自述"文件，用于说明如何读取每张氧气分布图对应的文本文件，该文件可作为导入氧气数据文本文件的模板使用。本数据集由FIO Y1.x041.000:0004项目资助。