A horizontal bar chart displays dry-air temperature samples from the data.csv file, with each bar labeled by date and UTC hour. The visualization uses d3.csv to load data, d3.scaleLinear for the x-axis, d3.scaleBand for the y-axis, and d3.axisBottom with custom tick formatting. SVG rectangles render the bars in steelblue, while axis labels and a title annotate the chart. The y-axis is stripped of its domain line and ticks, and the x-axis includes a custom temperature label.