There’s something else out there, but I’m on mobile and can’t find it. I don’t believe it’s an officially published paper though...just research done from the old NH office.
I’ve always found MOS busts hard in warm setups when you have bare, dry ground when climo says you should have pack or at least mud season. So yeah, it’s an albedo and/or a soil moisture effect.
Either fake or it's a car on the other side of the building in the parking lot. The view through the open space makes it look like it's in the foreground on the 3rd floor.