<
https://theconversation.com/luminous-mother-of-pearl-clouds-explain-why-climate-models-miss-so-much-arctic-and-antarctic-warming-217066>
"Our planet has warmed by about 1.2°C since 1850. But this warming is not
uniform. Warming at the poles, especially the Arctic, has been three to four
times faster than the rest of the globe. It’s a phenomenon known as “polar
amplification”.
Climate models simulate this effect, but when tested against the past 40 years
of warming, these models fall short. The situation is even worse when it comes
to modelling past climates with very high levels of greenhouse gases.
This is a problem because these are the same models used to project into the
future and forecast how the climate will change. They are likely to
underestimate what will happen later this century, including risks such as ice
sheet melting or permafrost thawing.
In our new research published today in
Nature Geoscience we used a
high-resolution model of the atmosphere that includes the stratosphere. We
found a special type of cloud appears over polar regions when greenhouse gas
concentrations are very high. The role of this type of cloud has been
overlooked so far. This is one of the reasons why our models are too cold at
the poles."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
