Hello, I am new here and took a look through the forms, if there is a better place for this question, feel free to move it there. I have been busting my noggin trying to google the answer to this problem I have. (Which isn't school/homework related) I am looking to determine an approximate temperature gradient of a large contained body of air. Think something in the rage of 800 to 2000 meters in vertical height. Thinking on the problem myself I understand it will probably be complicated, depending on the energy being added to the system, turbulence of the air, density, etc. Assumptions I'm making: Temperature known at the top Temperature known at the bottom Little to no added turbulence Normal earth-type air Things I would like to know: How humidity and pressure effect the system. Energy flow from the hotter (assuming) top of the system to the cooler, bottom of the system. Pressure gradient of the system. And obviously from the title, temperature gradient from the top to bottom of the system. Any help in solving this problem would be awesome, I imagine the answer won't necessarily be clear cut. Though it may be simpler than I thought.