Here is a video showing how CO2 concentration at different latitudes has changed since 1979. The global map shows where the measurements were/are being made and, on the right, a simultaneous comparison of measurements from Mauna Loa and the South Pole. At the end the chart on the right shows measurements of CO2 from ice cores and Keeling's measurements at Mauna Loa. Re-run it as often as you like.