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Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Feedback and Sensitivity in Climate Alain Lahellec

June 17, 2009

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Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

0.3

0.2

0.25

0.1

0.15

-0.05 -0.1 -0.15 -0.2

-0.3

-0.25

-0.4

-0.35

-0.45 -3

-2.5

-2

Tau prec 3m.

-0.5 log(t y), f(x)=365*10x

0

0.5

Oc Bk

1

1.5

2

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Figure: ClimSI WV feedback model responses.

ClimSI : Comparaison entre Reponses efficaces

Tau 28j.

-1.5

-1

0.05 -0.013804*(exp(-9.75776E-02*f(x))-1)-0.641613*(exp(-1.22354E-03*f(x))-1)-5.348124E-03*(exp(-0.1188725*f(x))-1)+0.4444444*(exp(-1.1813E-02*f(x))-1) "/data/al1/Pablo/cyclsta/sigma.datacysta" u (log10($1/365)):58 "/data/al1/Pablo/ocblok/sigma.data" u (log10($1/365)):58 0 "sigma.data" u (log10($1/365)):58 Rep Eff

Boundary layer, clouds and convection Approaches to the parametrization of the boundary layer Boundary layer processes in climate

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Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

university-logo

Boundary layer processes in climate

Approaches to the parametrization of the boundary layer

Boundary layer, clouds and convection

Outline 1

Boundary layer processes in climate Boundary layer as a boundary condition Boundary layer and clouds Boundary layer in the "Earth Systemp"

2

Approaches to the parametrization of the boundary layer Scale decomposition Diffusive approaches and their limitations Alternatives to diffusive approaches

3

Boundary layer, clouds and convection Could schemes in climate models Cumulus clouds and mass flux parametrisations Boundary layer and deep convection

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