For our assignment, we are required to analyse and compare the $\ce{CO2}$ level (in both ocean and air) of two different sites. Theoretically, shouldn't the $\ce{CO2}$ level of a colder region (e.g., Alaska) be higher due to $\ce{CO2}$ being more soluble in colder temperatures?
I've looked at the data (I'm comparing Alaska and the Equator) and the carbon dioxide concentration is higher for the equator. What could explain this? The data can be found at NOAA's PMEL Carbon Data Observation Data page.*
* The US National Oceanic and Atmospheric Administration / Pacific Marine Environmental Laboratory