The experimental work is based on IFS CY49R1 (50r1 control are in preparation). To achieve the Objectives 2025 a control experiment CY49R1.1 has been prepared and sensitivity runs with changing lake depths were submitted.

Lake experts recommended the minimum lake depth to be safely be lowered from the current 2m to 0.5m (with tests done down to 0.1m). 

flakerad_mod.F90:ZDEPTH_W_MAX = 50.0_JPRD              ! Maximum lake depth simulated by FLAKE
flakerad_mod.F90:ZDEPTH_W_MIN =  2.0_JPRD              ! Minimum lake depth simulated by FLAKE

Flake can therefore be adapted to represent the thermodynamics exchanges for inundated and irrigated areas. Two new branches are created (git main ifsbranch -J -B central/CY49R1.1 -b control).


NTypeExperimentResolutionTimeBranchLabelComments
1Surfaceiv3q (copy of iluo)TCo3991980-2024pad_CY49R1.1_controlCONTROL4 Layers as in 49r1 Oper.
Minimum lake depth 2.0m
2Surfaceiv6bTCo3991980-2024pad_CY49R1.1_shallow_waterSHALLOW WATERMinimum lake depth 0.5m
3Surfaceiv74TCo3991980-2024pad_CY49R1.1_shallow_water_1SHALLOW WATERMinimum lake depth 1.0m
4Surfaceiv8vTCo3991980-2024pad_CY49R1.1_shallow_water_15SHALLOW WATERMinimum lake depth 1.5m

Results file:///perm/pad/climsfc/49r1_shallow_lakes/plots/eval_mon.html indicate neutral impact from changing the minimum lake depth.

Lake mean depth correction/upgrade details the recently updated lake depth (i.e. new bathymetry for Caspian Sea, Azov Sea, Titicaca Lake, how we recognize lakes to map mean depth.

Experience with Time-varying lakes can help handle inundation and water recess. Time-varying lakes: offline model changes (+ experiments 1992-2019) are a useful set of experiments.

The Coupling feasibility (D4) of CAMA-Flood to IFS had already identified 2 possibilities. These were considered in the discussion Towards 2-way coupling of CaMa-Flood and ECland in preparation to the LCS25.


A revised soil permeability in presence of freezing is investigated via sensitivity experiments

NTypeExperimentResolutionTimeBranchLabelComments
1Surfaceivd5TCo3991980-2024pad_CY49R1.1_runoff_frozen_soilRUNOFF_FROZEN_SOIL

revised permeability limiting freezing shutdown to 50% of soil

2Surfaceivgk
TCo3991980-2024pad_CY49R1.1_runoff_frozen_soil_20RUNOFF_FROZEN_SOIL

revised permeability limiting freezing shutdown to 20% of soil

3Surfaceivgk
TCo3991980-2024pad_CY49R1_for_50R1_runoff_frozen_soil_top1mRUNOFF_FROZEN_SOIL

revised permeability limiting freezing shutdown to 50% of soil in the top 1m

Results file:///perm/pad/climsfc/49r1_shallow_lakes/plots/eval_mon.html indicate that 50% permeability in frozen soil condition can increase the overall soil water storage.

Experiment were reproduced in 50r1 cycle to benefit from the latest development (eg. glaciers).

NTypeExperimentResolutionTimeBranchLabelComments
1SurfaceivkrTCo3991980-2025pad_CY49R1_control_50R1_esuiteCONTROL4 Layers as in 49r1 Oper.
Minimum lake depth 2.0m
2SurfaceivnlTCo3991980-2025pad_CY49R1_for_50R1_runoff_frozen_soilRUNOFF_FROZEN_SOILrevised permeability limiting freezing shutdown to 50% of soil
3SurfaceivwfTCo1279+ERA52016-2025pad_CY49R1_control_50R1_esuiteCONTROLcontrol TCo1279 ERA5-forcing
4SurfaceivweTCo1279+ERA52016-2025pad_CY49R1_for_50R1_runoff_frozen_soilRUNOFF_FROZEN_SOILexp TCo1279 ERA-forcing
5SurfaceivxqTCo1279+Oper2016-2025pad_CY49R1_control_50R1_esuiteCONTROLcontrol TCo1279 OPER-forcing
6Surfaceivy0TCo1279+Oper2016-2025pad_CY49R1_for_50R1_runoff_frozen_soilRUNOFF_FROZEN_SOILexp TCo1279 OPER-forcing
7Surfaceiw60
TCo3991980-2024pad_CY49R1_for_50R1_runoff_frozen_soil_top1mRUNOFF_FROZEN_SOIL

revised permeability limiting freezing shutdown to 50% of soil in the top 1m

A new soil discretisation (control experiment iv3r) and new climate fields version (climate.v023) will be tested in parallel and the CAMA-Coupling of lakes and inundation require alignment with the Hydro branches. Here 2 work in progress experiment (not yet completing):


NTypeExperimentResolutionTimeBranchLabelComments
1Surfaceiv3r (copy of iow3)TCo3991980-2024pa1_CY49R1_SoilML_DA.IFS-34589 Layers 

9 Layers with max depth

2SurfaceivauTCo3991980-2024pad_CY49R1.1_controlCAMA-FLAKECouple inundation with lakes
3SurfaceivkrTCo3991980-2025pad_CY49R1_control_50R1_esuiteCONTROL

4 Layers as in 49r1 Oper. 
CAMA-Flood is coupled 1way

4Surfaceivk9
TCo3991980-2025pad_CY49R1_control_50R1_esuiteCAMA2WAYCAMA-Flood is coupled 2way with impact on Evaporation
5Surfaceiw03
TCo3991980-2025pad_CY49R1_control_50R1_esuiteCAMA2WAYCAMA-Flood is coupled 2way with impact on Evaporation, and with water extracted from rivers (LWEVAP=.true.)
6Surfaceivs4
TCo3991980-2025pad_CY49R1_for_50R1_hydro_cond_pwpDRYLANDTest limiter of the hydraulic conductivity at the permanent wilting point


A set of case studies is identified and the plan is to compare with the operational runs and the Atos DestinE Extremes DT run. The control TEST: Run ecLand/CaMa-Flood with SDFOR instead of SDOR can provide the starting point from both 9 and 4km coupled testing. Offline DestinE new experiments are also providing a useful batch.

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