Dataset B — Mauna Loa CO₂ Monthly (NOAA GML)

Source: NOAA Global Monitoring Laboratory — Mauna Loa monthly mean CO₂
What it is: Monthly average atmospheric CO₂ at Mauna Loa (1958–present) with columns for average, interpolated, trend, and number of days.

Columns & attribute types (VAD):

• year — time (ordered)
• month (1–12) — ordered (cyclic)
• decimal_date — quantitative (continuous)
• average (ppm) — quantitative
• interpolated (ppm) — quantitative
• trend (ppm) — quantitative
• days — quantitative (count)

Notes: The original CSV includes comment lines starting with #. The code strips those before parsing.