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).
| N | Type | Experiment | Resolution | Time | Branch | Label | Comments |
|---|---|---|---|---|---|---|---|
| 1 | Surface | iv3q (copy of iluo) | TCo399 | 1980-2024 | pad_CY49R1.1_control | CONTROL | 4 Layers as in 49r1 Oper. Minimum lake depth 2.0m |
| 2 | Surface | iv6b | TCo399 | 1980-2024 | pad_CY49R1.1_shallow_water | SHALLOW WATER | Minimum lake depth 0.5m |
| 3 | Surface | iv74 | TCo399 | 1980-2024 | pad_CY49R1.1_shallow_water_1 | SHALLOW WATER | Minimum lake depth 1.0m |
| 4 | Surface | iv8v | TCo399 | 1980-2024 | pad_CY49R1.1_shallow_water_15 | SHALLOW WATER | Minimum 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
| N | Type | Experiment | Resolution | Time | Branch | Label | Comments |
|---|---|---|---|---|---|---|---|
| 1 | Surface | ivd5 | TCo399 | 1980-2024 | pad_CY49R1.1_runoff_frozen_soil | RUNOFF_FROZEN_SOIL | revised permeability limiting freezing shutdown to 50% of soil |
| 2 | Surface | ivgk | TCo399 | 1980-2024 | pad_CY49R1.1_runoff_frozen_soil_20 | RUNOFF_FROZEN_SOIL | revised permeability limiting freezing shutdown to 20% of soil |
| 3 | Surface | ivgk | TCo399 | 1980-2024 | pad_CY49R1_for_50R1_runoff_frozen_soil_top1m | RUNOFF_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).
| N | Type | Experiment | Resolution | Time | Branch | Label | Comments |
|---|---|---|---|---|---|---|---|
| 1 | Surface | ivkr | TCo399 | 1980-2025 | pad_CY49R1_control_50R1_esuite | CONTROL | 4 Layers as in 49r1 Oper. Minimum lake depth 2.0m |
| 2 | Surface | ivnl | TCo399 | 1980-2025 | pad_CY49R1_for_50R1_runoff_frozen_soil | RUNOFF_FROZEN_SOIL | revised permeability limiting freezing shutdown to 50% of soil |
| 3 | Surface | ivwf | TCo1279+ERA5 | 2016-2025 | pad_CY49R1_control_50R1_esuite | CONTROL | control TCo1279 ERA5-forcing |
| 4 | Surface | ivwe | TCo1279+ERA5 | 2016-2025 | pad_CY49R1_for_50R1_runoff_frozen_soil | RUNOFF_FROZEN_SOIL | exp TCo1279 ERA-forcing |
| 5 | Surface | ivxq | TCo1279+Oper | 2016-2025 | pad_CY49R1_control_50R1_esuite | CONTROL | control TCo1279 OPER-forcing |
| 6 | Surface | ivy0 | TCo1279+Oper | 2016-2025 | pad_CY49R1_for_50R1_runoff_frozen_soil | RUNOFF_FROZEN_SOIL | exp TCo1279 OPER-forcing |
| 7 | Surface | iw60 | TCo399 | 1980-2024 | pad_CY49R1_for_50R1_runoff_frozen_soil_top1m | RUNOFF_FROZEN_SOIL | revised permeability limiting freezing shutdown to 50% of soil in the top 1m |
| 8 | Surface | iwlp | TCo399 | 1980-2024 | pad_CY49R1_for_50R1_runoff_frozen_soil | RUNOFF_FROZEN_SOIL | revised permeability limiting freezing shutdown to column volume integral. |
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):
| N | Type | Experiment | Resolution | Time | Branch | Label | Comments |
|---|---|---|---|---|---|---|---|
| 1 | Surface | iv3r (copy of iow3) | TCo399 | 1980-2024 | pad_CY49R1_control_50R1_esuite (from pa1_CY49R1_SoilML_DA.IFS-3458) | 9 Layers | 9 Layers with max depth 2.89 |
| 2 | Surface | ivau | TCo399 | 1980-2024 | pad_CY49R1.1_control | CAMA-FLAKE | Couple inundation with lakes |
| 3 | Surface | ivkr | TCo399 | 1980-2025 | pad_CY49R1_control_50R1_esuite | CONTROL | 4 Layers as in 49r1 Oper. |
| 4 | Surface | ivk9 | TCo399 | 1980-2025 | pad_CY49R1_control_50R1_esuite | CAMA2WAY | CAMA-Flood is coupled 2way with impact on Evaporation |
| 5 | Surface | iw03 | TCo399 | 1980-2025 | pad_CY49R1_control_50R1_esuite | CAMA2WAY | CAMA-Flood is coupled 2way with impact on Evaporation, and with water extracted from rivers (LWEVAP=.true.) |
| 6 | Surface | ivs4 | TCo399 | 1980-2025 | pad_CY49R1_for_50R1_hydro_cond_pwp | DRYLAND | Test 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.