A new study conducted in China sheds light on the consequences of extreme weather-related temperatures. Researchers discovered that individuals experiencing more extremely hot or cold days were more likely to report depressive symptoms. As climate change has exposed more individuals to extreme temperatures, this research can help communities and clinicians recognize potential environmental triggers for depression. ...
I don't think so in this instance it probably is saying that the high temperature leads to a mismatch between the 'local circadian time' of a part of the body and the 'master clock' in the brain. Mismatches have proven to exist and to cause chemical imbalance in our body for example eating windows and it's effect on our body in respect to blood sugars. I even wrote about that one a couple of months back on hexbear if it's still there. I could totally see that a mismatch can cause that and doing tests between people with a conditioned vs unconditioned room could be interesting to look at. Also circadian rhythm is still fairly new grounds I think the knowledge that 'local' circadian clocks exist is only about a decade old.