Last year, temperatures were not as cold as they usually are near the North Pole. This was blamed on CO2 trapping heat.
http://ocean.dmi.dk/arctic/plots/meanTarchive/meanT_2018.png
This year, temperatures are very cold near the North Pole. Apparently CO2 is getting lazy with its heat trapping capabilities.
http://ocean.dmi.dk/arctic/plots/meanTarchive/meanT_2019.png
CO2 appears to be a very fickle gas.