A team of climate scientists, led by James Hansen (USA) have prepared a paper which is also the subject of a seminar on YouTube. The paper is long and complicated and I can’t pretend to understand the complicated sections, but you can link to it here.
However, the YouTube webinar ”Intimate Conversation…” webinar at https://www.youtube.com/watch?v=NXDWpBlPCY8
clearly presents some very interesting facts that throw a new light on global temperature increases.