CAM4 Homogenous Radiation 2D Fields

Single-level fields from the homogenous radiation simulations included in section 6 of the JGR manuscript Needham and Randall (2021). The simulation referred to as "Control" in the manuscript has the case name "QPC4_300k_radavg-ctrl" in this repository and includes no changes from the standard CAM4 physics. The simulation refered to as "RadAvg" in the manuscript has the case name "QPC4_300k_radavg-hmg" in this repository. The only change from Control for this case is that the GCM temperature is updated using the globally averaged net radiative heating rate.