I think it's the old belief that hurricanes throw heat energy into the NAO domain. I remember that was the belief awhile back. I feel like that is more myth vs truth. Nina's always have more tropical activity and usually aren't conducive for blocking in that area given faster mid latitude flow. Not to say it couldn't happen...but just speaking on climo.
It clearly was not a TS at the time. Every piece of data pointed to it. You also had buoys showing winds at hurricane force too. Based on his track record, he’s nothing more than somebody trying to be different and has done so in a foolish way.
Yeah radiative budget was positive, but that was more because of warming in upper levels. Opposite effect from volcanoes.
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082360
If soot gets into the high trop and stratosphere, it can have a net warming effect in the mid trop. So overall it may be a slight warming effect while keeping surface inverted with cooler than expected temps.
Got my answer. Apparently it won’t affect outgoing long wave radiation, but will have an effect on incoming shortwave radiation, which is what we have during the day.