It has been known that Chinaâ(TM)s SO*/NO* was holding temps down all over northern hemisphere. It was also known that if they dropped the visible pollution ( large-medium particles, combined with above gases ), but do not lower invisible pollution such as CO*/CH4/etc, along with small particles, that heat would be increasing. That is obviously what is happening. Monitoring in RMN parks continue to pick up small particles, lead, mercury coming from China. Iâ(TM)ve not heard about arctic, but I would guess that Alaska/western Canada continue to warm much faster that eastern Canada/europe.
Oddly, I saw something the other day that might help the arctic. Basically, they are looking at doing the same thing we did back in the 60s to make rinks on lakes. Cut a hole in the ice and pump water onto the ice. It was surprising how thick that area could get compared to other ice. So, they are looking at putting a number of pumps in the ice and have it build up over a season. This could be started in April using PV, and pulled out in oct. Hopefully, this would not turn darker than normal since it will have a constant small particles falling on it. Still, this might be an interesting way to rebuild arctic ice.