"The LRJ industry starts in europe during 50-45kya, contemporary to various transitional Neanderthal-Sapien industries such as Chatelperronian and Uluzzian.
The Initial Upper Paleolithic culture (IUP), genetically related to East Eurasians, spreads to both Southeast Europe and the Altai in 45kya, while the East Eurasian Core and Flake industry spreads from the south northward into China.
By 45kya, the West Eurasian Aurignacian Culture spreads into europe, possibly via Anatolia or the Caucasus. Partly Contemporarily, the closely related Gravettian Culture spreads northward into Eastern Eurpope via the Caucasus and then spreads West into the Aurignacian Culture and Eastward, replacing the Altai IUP Culture and migrating far to the to Yana and various related ivory sites.
Before this, there were various possibly-IUP sites with evidence of human activity older than 40kya in the arctic circle, an remarkable testament to early humans climactic resilience.

around 10 thousand years later, the Late Glacial Maximum event hits, drastically lowering temperatures across the globe, forcing the humans in the arctic to abandon their lands and migrate south. During this LGM, there is almost no evidence of Human presence north of the Carpathians and Alps in Europe.

Only after the LGM in 15kya would Humans begin to resettle and expand out of the Refugia back into the rest of Europe as the Soluteran and Magdelanian Cultures. Following this Period, the Scandinavian ice cap started to melt, allowing humans to migrated into Scandinavia for the first time in prehistory, and when they did so, they did so very rapidly, reaching the northernmost part of Scandinavia by 11kya as the Komsa-Hensbacka Culture."