This visualization displays daily surface air temperature data from 1940 to 2024, plotting day of year on the x-axis and temperature on the y-axis. Each year appears as a line, colored using the plasma sequential color scale via d3’s `scaleSequential` and `interpolatePlasma`, while the year 2024 is highlighted in red with a thicker stroke. The chart uses `d3.scaleLinear` for axes and `@curran/responsive-axes` for layout, with data prepared by Matthias Stahl and grouped by year using `flatGroup`.