This radial bar chart displays the distribution of sea surface temperatures across different climate classes, with each colored band extending outward from a central donut. The chart uses D3.js v6 with SVG rendering and React, loading CSV data from a GitHub gist. The code employs d3.scaleBand for angular positioning and d3.scaleRadial for radius values, while d3.arc constructs the annular bars with padded gaps. Labels are rotated and positioned around the perimeter, with text anchors adjusted to maintain readability. The inner radius is fixed at 90, and the outer radius scales up to the maximum data value of 39,999.