Climate modelling matters in the Arctic. It is warming four times faster than the rest of the world, according to the EU’s climate change monitor, with high intensity fires sweeping across Russia’s Sakha Republic this summer for the third time in five years. Its sea ice has been declining for decades, making the northern route from European Russia to the Bering Sea more navigable and threatening the Arctic’s ecosystems. So it’s a concern that Russia stopped sharing climate change data about the Arctic when it invaded Ukraine in 2022. Of 95 field bases in the Arctic, 21 are “on pause”. “It’s a quite nasty game where climate is now hostage also in this relationship,” a Nato official told the FT. Quite. The warning comes ahead of the UN Cop29 climate summit next month in Azerbaijan.