Rewording this deleted the last comment I made. To anyone who don't know what fimbulwinter is according to the myths its 3 winters in a row as seasons instead of the normal seasons occurring before ragnarok. So instead of winter spring then summer it's just 3 winters in a row. I say this cuz I don't know anything about the Gulf stream maybe someone who doesn't know the myths might know how 3 winters can happen in a row instead of the normal order seasons occur and they might come across this. I personally don't believe in the myths tho im a Norse pagan and believe in the gods but I thought I would write this.