Node

class cosipy.cpkernel.node.Node(*args, **kwargs)[source]

Bases: Node

A Node class stores a layer’s state variables.

A node stores the information of an individual layer. The class provides various setter/getter functions to read or overwrite the state of an individual layer.

height

Layer height [m].

Type:: float

snow_density

Layer snow density [kg m ^-3].

Type:: float

temperature

temperature [K].

Type:: float

liquid_water_content

Liquid water content [m w.e.].

Type:: float

ice_fraction

Volumetric ice fraction [-].

Type:: float

refreeze

Amount of refrozen liquid water [m w.e.].

Type:: float

Attributes

class_type

Methods

`__init__`(height, snow_density, temperature, ...)
`get_layer_air_porosity`()	Get the fraction of air in the node.
`get_layer_cold_content`()	Get the node's cold content.
`get_layer_density`()	Get the node's mean density including ice and liquid.
`get_layer_height`()	Get the node's layer height.
`get_layer_ice_fraction`()	Get the node's volumetric ice fraction.
`get_layer_irreducible_water_content`()	Get the node's irreducible water content.
`get_layer_liquid_water_content`()	Get the node's liquid water content.
`get_layer_porosity`()	Get the node's porosity.
`get_layer_refreeze`()	Get the amount of refrozen water in the node.
`get_layer_specific_heat`()	Get the node's volume-weighted specific heat capacity.
`get_layer_temperature`()	Get the node's snow layer temperature.
`get_layer_thermal_conductivity`()	Get the node's volume-weighted thermal conductivity.
`get_layer_thermal_diffusivity`()	Get the node's thermal diffusivity.
`set_layer_height`(height)	Set the node's layer height.
`set_layer_ice_fraction`(ifr)	Set the node's volumetric ice fraction.
`set_layer_liquid_water_content`(lwc)	Set the node's liquid water content.
`set_layer_refreeze`(refr)	Set the amount of refrozen water in the node.
`set_layer_temperature`(T)	Set the node's mean temperature.

__init__(height, snow_density, temperature, liquid_water_content, ice_fraction=None)[source]

Parameters:

height (float)
snow_density (float)
temperature (float)
liquid_water_content (float)
ice_fraction (float)

get_layer_air_porosity()[source]

Get the fraction of air in the node.

Returns:: Air porosity, \(\phi_{v}\) [-].
Return type:: float

get_layer_cold_content()[source]

Get the node’s cold content.

Returns:: Cold content [J m ^-2].
Return type:: float

get_layer_density()[source]

Get the node’s mean density including ice and liquid.

Returns:: Layer density [kg m ^-3].
Return type:: float

get_layer_height()[source]

Get the node’s layer height.

Returns:: Snow layer height [m].
Return type:: float

get_layer_ice_fraction()[source]

Get the node’s volumetric ice fraction.

Returns:: The volumetric ice fraction, \(\theta_{i}\) [-].
Return type:: float

get_layer_irreducible_water_content()[source]

Get the node’s irreducible water content.

Returns:: Irreducible water content, \(\theta_{e}\) [-].
Return type:: float

get_layer_liquid_water_content()[source]

Get the node’s liquid water content.

Returns:: Liquid water content, [m w.e].
Return type:: float

get_layer_porosity()[source]

Get the node’s porosity.

Returns:: Layer porosity, \(\phi\) [-].
Return type:: float

get_layer_refreeze()[source]

Get the amount of refrozen water in the node.

Returns:: Amount of refrozen water per time step [m w.e.].
Return type:: float

get_layer_specific_heat()[source]

Get the node’s volume-weighted specific heat capacity.

Returns:: Specific heat capacity [J \(\cdot\) kg ^-1 K ^-1].
Return type:: float

get_layer_temperature()[source]

Get the node’s snow layer temperature.

Returns:: Snow layer temperature [K].
Return type:: float

get_layer_thermal_conductivity()[source]

Get the node’s volume-weighted thermal conductivity.

Returns:: Thermal conductivity, \(\kappa\) [W m ^-1 K ^-1].
Return type:: float

get_layer_thermal_diffusivity()[source]

Get the node’s thermal diffusivity.

Returns:: Thermal diffusivity, \(\lambda\) [m ² s ^-1].
Return type:: float

set_layer_height(height)[source]

Set the node’s layer height.

Parameters:: height (float) – Layer height [m].

set_layer_ice_fraction(ifr)[source]

Set the node’s volumetric ice fraction.

Parameters:: ifr (float) – Volumetric ice fraction, \(\theta_{i}\) [-].

set_layer_liquid_water_content(lwc)[source]

Set the node’s liquid water content.

Parameters:: lwc (float) – Liquid water content [m w.e].

set_layer_refreeze(refr)[source]

Set the amount of refrozen water in the node.

Parameters:: refr (float) – Amount of refrozen water [m w.e.].

set_layer_temperature(T)[source]

Set the node’s mean temperature.

Parameters:: T (float) – Layer temperature [K].