From 4bdb898ed0d0933547cf3f089a9351009a0002de Mon Sep 17 00:00:00 2001
From: Julia Sloan <jsloan@caltech.edu>
Date: Tue, 15 Jul 2025 11:47:58 -0700
Subject: [PATCH 1/2] remove bucket get_new_cache

---
 NEWS.md                                       |  6 +++
 .../components/land/climaland_bucket.jl       | 44 +++++--------------
 2 files changed, 18 insertions(+), 32 deletions(-)

diff --git a/NEWS.md b/NEWS.md
index fda9dcc22a..0ff62a92fa 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -6,6 +6,12 @@ ClimaCoupler.jl Release Notes
 
 ### ClimaCoupler features
 
+#### Remove bucket `get_new_cache` PR[#1437](https://github.com/CliMA/ClimaCoupler.jl/pull/1437)
+
+As of ClimaLand v0.16.2, total energy and and water are always stored in the bucket cache.
+This PR removes the `get_new_cache`, which allocated space for the energy field,
+and instead accesses the cached fields directly.
+
 #### Add option for integrated land spun up IC. PR[#1318](https://github.com/CliMA/ClimaCoupler.jl/pull/1318)
 
 Adds a boolean flag `land_spun_up_ic` that allows the user to request reading integrated land
diff --git a/experiments/ClimaEarth/components/land/climaland_bucket.jl b/experiments/ClimaEarth/components/land/climaland_bucket.jl
index 24a061ac8b..891784029f 100644
--- a/experiments/ClimaEarth/components/land/climaland_bucket.jl
+++ b/experiments/ClimaEarth/components/land/climaland_bucket.jl
@@ -37,20 +37,6 @@ struct BucketSimulation{M <: CL.Bucket.BucketModel, I <: SciMLBase.AbstractODEIn
     output_writer::OW
 end
 
-"""
-    get_new_cache(p, Y, energy_check)
-Returns a new `p` with an updated field to store e_per_area if energy conservation
-    checks are turned on.
-"""
-function get_new_cache(p, Y, energy_check)
-    if energy_check
-        e_per_area_field = CC.Fields.zeros(axes(Y.bucket.W))
-        return merge(p, (; e_per_area = e_per_area_field))
-    else
-        return p
-    end
-end
-
 """
     bucket_init
 
@@ -140,9 +126,6 @@ function BucketSimulation(
     # Initial conditions with no moisture
     Y, p, coords = CL.initialize(model)
 
-    # Add space in the cache for the energy if energy checks are enabled
-    p = get_new_cache(p, Y, energy_check)
-
     # Get temperature anomaly function
     T_functions = Dict("aquaplanet" => temp_anomaly_aquaplanet, "amip" => temp_anomaly_amip)
     haskey(T_functions, land_temperature_anomaly) ||
@@ -262,29 +245,26 @@ Interfacer.get_field(sim::BucketSimulation, ::Val{:surface_temperature}) =
 """
     Interfacer.get_field(sim::BucketSimulation, ::Val{:energy})
 
-Extension of Interfacer.get_field that provides the total energy contained in the bucket, including the latent heat due to snow melt.
-"""
-function Interfacer.get_field(sim::BucketSimulation, ::Val{:energy})
-    # required by ConservationChecker
-    e_per_area = sim.integrator.p.e_per_area .= 0
-    CC.Operators.column_integral_definite!(e_per_area, sim.model.parameters.ρc_soil .* sim.integrator.u.bucket.T)
-
-    e_per_area .+=
-        -LP.LH_f0(sim.model.parameters.earth_param_set) .* LP.ρ_cloud_liq(sim.model.parameters.earth_param_set) .*
-        sim.integrator.u.bucket.σS
+Extension of Interfacer.get_field that provides the total energy contained in the bucket,
+computed from the temperature of the bucket and also including the latent heat of fusion
+of frozen water in the snow.
 
-    return e_per_area
-end
+This method is required by the ConservationChecker to check energy conservation.
+"""
+Interfacer.get_field(sim::BucketSimulation, ::Val{:energy}) = sim.integrator.p.bucket.total_energy
 
 """
     Interfacer.get_field(sim::BucketSimulation, ::Val{:water})
 
-Extension of Interfacer.get_field that provides the total water contained in the bucket, including the liquid water in snow.
+Extension of Interfacer.get_field that provides the total water contained in the bucket.
+The total water contained in the bucket is the sum of the subsurface water storage `W`,
+the snow water equivalent `σS`, and surface water content `Ws`.
+
+This method is required by the ConservationChecker to check water conservation.
 """
 function Interfacer.get_field(sim::BucketSimulation, ::Val{:water})
     ρ_cloud_liq = CL.LP.ρ_cloud_liq(sim.model.parameters.earth_param_set)
-    return
-    @. (sim.integrator.u.bucket.σS + sim.integrator.u.bucket.W + sim.integrator.u.bucket.Ws) * ρ_cloud_liq  # kg water / m2
+    return sim.integrator.p.bucket.total_water .* ρ_cloud_liq # kg water / m2
 end
 
 function Interfacer.update_field!(sim::BucketSimulation, ::Val{:air_density}, field)

From 7a5271fdf12dd97c291553c8ea6de779f72f81cb Mon Sep 17 00:00:00 2001
From: Julia Sloan <jsloan@caltech.edu>
Date: Tue, 15 Jul 2025 17:50:10 -0700
Subject: [PATCH 2/2] increase ClimaLand compat to skip buggy version

---
 experiments/ClimaEarth/Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/experiments/ClimaEarth/Project.toml b/experiments/ClimaEarth/Project.toml
index e99180396b..25d6e284ce 100644
--- a/experiments/ClimaEarth/Project.toml
+++ b/experiments/ClimaEarth/Project.toml
@@ -39,7 +39,7 @@ ClimaAnalysis = "0.5.10"
 ClimaAtmos = "0.27, 0.28, 0.29, 0.30, 0.31"
 ClimaCalibrate = "0.1"
 ClimaDiagnostics = "0.2.6"
-ClimaLand = "0.17"
+ClimaLand = "0.17.1"
 ClimaOcean = "0.7"
 ClimaParams = "0.10"
 ClimaTimeSteppers = "0.7, 0.8"