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COSMO Priority Task Mire parameterization. Alla Yurova ( Hydrometcentre of Russia) Gerd Vogel (DWD). Task aim :. to incorporate a mire parameterization into the TERRA land surface scheme

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Cosmo priority task mire parameterization

COSMO Priority Task

Mire parameterization

Alla Yurova (Hydrometcentre of Russia)

Gerd Vogel (DWD)


Task aim
Task aim:

  • to incorporate a mire parameterization into the TERRA land surface scheme

  • to investigate the influence of mire parameterization on the components of the heat and water balance simulated by TERRA and compare them with available observations


Cosmo priority task mire parameterization

Results of the preliminary tests with the mire parameterization in the COSMO model

Modifications: mire evapotranspiration as a function of PET for a climatic average position of the mire water table depth

2m temperature difference between the modified (with the mire parameterization) and the standard COSMO model. 36h forecast, starting at 00 UTC, 10 August 2011, COSMO-RU domain


Cosmo priority task mire parameterization

2m temperature difference between the modified (with the mire parameterization) and the standard COSMO model. 36h forecast, starting at 00 UTC, 10 August 2011, COSMO-RU domain, Western Siberia


Cosmo priority task mire parameterization

2m temperature difference between the modified (with the mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70o E, 62o N)


Cosmo priority task mire parameterization

More latent heat mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70is released from the mires into the atmosphere

Difference in the surface latent heat flux (W/m2) between the modified (with the mire parameterization) and the standard COSMO model. 36h forecast, starting at 00 UTC, 10 August 2011, COSMO-RU domain , Western Siberia


Cosmo priority task mire parameterization

…As a result a cloud cover (low level) is increased mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

black-with mire parameterization

green- standard

The cloud cover (low level) simulated by the modified (with the mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70o E, 62o N)


Cosmo priority task mire parameterization

…Due to intensified convection mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

black-with mire parameterization

green- standard

CAPE (J/kg) simulated by the modified (with the mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70o E, 62o N)


Cosmo priority task mire parameterization

Also modified are: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

  • Solar and thermal net radiation at the surface

  • Boundary layer depth

  • Precipitation

  • Surface wind field (slightly)

  • ...

    Conclusion: COSMO model is sensitive to the

    additional moisture source introduced by

    the mire parameterization


Cosmo priority task mire parameterization

  • Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

  • Compilation of a database of the mire distribution on a 1km grid in TERRA-compatible format based on satellite vegetation classification (GEM, Bartalev ) and national peat surveys (Vompersky et al. )

  • Consistency check with TERRA soiltype 8

  • (peat) from FAO


Cosmo priority task mire parameterization

Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

2. Prescription of peat thermal properties in TERRA with dependencies of thermal conductivity on soil water (ice) content using the organic soil thermal conductivity database


Cosmo priority task mire parameterization

Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

3a. MMWH model programmed as subroutine ready to use in TERRA and documented.


Cosmo priority task mire parameterization

The Mixed Mire Water and Heat model mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70MMWH (Granberg et al., 1999)

zwt

zcat

W=P-E-q,

q=lq·i·K_h(zcat-zwt),

W-water content, P-precipitation, E-evapotranspiration, q-runoff, i-slopeof the water table,·K_h-transmissivity coefficient,lq-lumped parameter


Cosmo priority task mire parameterization

Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

3b. TERRA standard soil water transfer code based on Richards equation with an exchange with groundwater at the lower boundary applied and tested for the mire sites.


Cosmo priority task mire parameterization

Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

4. Quantitative estimates of the mire parameterization performance in stand-alone TERRA tests for selected mire sites

Degero Stormyr, Nothern Sweden Lammin Suo, North European Russia

Vasyugan bog, Siberia? Abisko, N. Sweden? Finnish mires? (Euroflux network)


Cosmo priority task mire parameterization

Planned sub-tasks: mire parameterization) and the standard COSMO model. 72h forecast, starting at 00 UTC, 10 August 2011, single point in Western Siberia (70

5a. Integration of the mire parameterization in a fully coupled COSMO model for the COSMO-RU domain.

5b. Investigation of the fully coupled COSMO model performance with the mire parameterization for various seasons.