I don't think it merges really well with the style of your map, it does get a little messy. Maybe more solid colors, like if it's permafrost and constant snow: make it white/grey? I think one of the best things with your map is it's solid colors and nice full layout - check out Google maps, and zoom in on where the tip of the south Americas points towards the tip of Antarctica; some solid white on the s. American tip = permanent snow.

But, maybe you want weather effects? Like falling snow and so on - then it's all good.