https://www.newscientist.com/article/2345643-tonga-eruptions-volcanic-plume-reached-above-the-stratosphere-twice/https://www.severe-weather.eu/global-weather/cold-anomaly-stratosphere-polar-vortex-volcanic-cooling-winter-influence-fa/https://www.severe-weather.eu/global-weather/stratosphere-polar-vortex-cooling-event-update-cold-anomaly-winter-season-influence-fa/Below we have the NASA analysis of the water vapor anomaly at around 26mb pressure level (24km/15mi). Again, you can see a significant increase following the eruption, spreading across the south and north hemisphere, still ongoing.
https://www.bbc.com/news/world-australia-63382895The city has seen around 170 days of rain so far in 2022 - there have been more rainy days than dry ones.
March, july and october were the wettest march, june and october ever for Sydney.
Basically the stratospheric vortex on the southern hemisphere intensifies and becomes more compact, making the vortex stronger, keeping cold on the Antarctic with westerlies blowing more to the south than usual, which paves the way for the La Nina + negative Indian Oceanic Dipole set-up to penetrate into Australia even more with a more dominated easterlies tropical humid pattern, basically more frequent monsoon break outs in northeastern, eastern and southeastern Australia, creating a much wetter pattern.
Next summer in Australia will be much wetter above average, potentially near or above record levels of rainfall.
