Advocate that governments cut down on soot emissions.
This accounts for a significant portion of the current temperature rise in the Arctic -- but, most importantly -- an unknown amount of the loss of snow and ice cover.
https://www.scientificamerican.com/article/scientists-track-...
Unfortunately, this form of carbon (soot) is not as useful for funds transfer...
Between cutting down soot (all Chinese power plants could be outfitted with soot collectors in one year), and planting trees (which is the least expensive, most accessible option for sequestering carbon dioxide at planetary scale), we could actually start to impact arctic snow cover and permafrost within a couple of years, within a budgetary envelope that every developed country could easily manage.
But, once again -- unfortunately, neither of these options appear to be politically attractive, because the primary goal seems to be wealth transfer, not actual harm mitigation...