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 |
| 5 | Surface | ivau | TCo399 | 1980-2024 | pad_CY49R1.1_control | CAMA-FLAKE | Couple inundation with lakes |
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 |
A new soil discretisation (control experiment iv3r) and new climate fields version (climate.v023) will be tested in parallel.
| N | Type | Experiment | Resolution | Time | Branch | Label | Comments |
|---|---|---|---|---|---|---|---|
| 1 | Surface | iv3r (copy of iow3) | TCo399 | 1980-2024 | pa1_CY49R1_SoilML_DA.IFS-3458 | 9 Layers | 9 Layers with max depth |
