dispatch based on microphysics model choice, update NEWS.md

Co-authored-by: Anna Jaruga <[email protected]>

Author: erphamucsd

NEWS.md

@@ -4,10 +4,13 @@ ClimaAtmos.jl Release Notes
 main
 -------
 
+### Add RWP diagnostic
+PR [#3946](https://github.com/CliMA/ClimaAtmos.jl/pull/3946) adds rainwater path diagnostic variable.
+
 v0.31.1
 -------
 
-PR [#3917](https://github.com/CliMA/ClimaAtmos.jl/pull/3917) adds common numercis configs for different resolutions. 
+PR [#3917](https://github.com/CliMA/ClimaAtmos.jl/pull/3917) adds common numerics configs for different resolutions. 
 These configurations are intended to serve as the default settings. Please modify them only if you are certain of the implications.
 
 v0.31.0

src/diagnostics/core_diagnostics.jl

@@ -1508,7 +1508,7 @@ add_diagnostic_variable!(
 # Rain water path (2d)
 ###
 compute_rwp!(out, state, cache, time) =
-    compute_rwp!(out, state, cache, time, cache.atmos.moisture_model)
+    compute_rwp!(out, state, cache, time, cache.atmos.microphysics_model)
 compute_rwp!(_, _, _, _, model::T) where {T} =
     error_diagnostic_variable("rwp", model)
 
@@ -1518,7 +1518,7 @@ function compute_rwp!(
     cache,
     time,
     moisture_model::T,
-) where {T <: Union{EquilMoistModel, NonEquilMoistModel}}
+) where {T <: Union{Microphysics1Moment, Microphysics2Moment}}
     if isnothing(out)
         out = zeros(axes(Fields.level(state.f, half)))
         rw = cache.scratch.ᶜtemp_scalar