AGWSF's Greenhouse Effect doesn't have convection because it doesn't have real gases, it has substituted the imaginary ideal gas without properties and
processes, but our real Earth's atmosphere does have convection — the heavy ocean of real fluid gas oxygen and nitrogen weighing a ton on our shoulders, a stone per square inch, acts like a blanket around the Earth stopping the
heat escaping, compare
with the Moon which has
extreme swings of temperature.
Later came experimentations
with extreme heat, airtight containers, and tin containers until a
process was cemented and perfected.