---
title: "The Keeling curve"
styles: [scientific]
---

```chart
{
  "axes": {
    "y": {
      "digits": 5,
      "label": "CO₂ mole fraction",
      "unit": "ppm"
    }
  },
  "data": {
    "csv": "data.csv"
  },
  "encoding": {
    "detail": [
      "note"
    ],
    "x": "month",
    "y": "monthly_mean"
  },
  "title": "The seasonal cycle sits on a long-term rise in CO₂",
  "type": "line"
}
```