oggm_edu.MassBalance

class oggm_edu.MassBalance(ela, gradient, breakpoints=None, max_mb=None, hemisphere=None, density=None)

Oggm Edu mass balance, used to construct the oggm_edu.Glacier. The mass balance can be constructed with either a single mass balance gradient resulting in a linear mass balance, or with multiple gradients - resulting in a non-linear mass balance profile.

Attributes

elaint or float

Altitude of the equilibrium line altitude (m).

gradint or float or list

Gradient of the mass balance profile. Single scalar if linear or multiple scalars if non-linear. Unit: mm/m/yr

orig_ela_hint or float

Original equilibrium line altitude of the mass balance profile. Unit: m.

temp_biasfloat

Current temperature bias applied to the mass balance (unit: °C)

__init__(ela, gradient, breakpoints=None, max_mb=None, hemisphere=None, density=None)

Initialise the mass balance from the ELA and the gradient. Optionally pass breakpoints in the case of multiple gradients.

Parameters

elaint or float

Equilibrium line altitude of the mass balance. Units: m.

gradientint or float or array_like(int or float)

Mass balance gradient. Define the altitude relation of the mass balance. If array like with int/float, a mass balance with multiple gradients will be initialised.

breakpointsarray_like(int or float) (Optional)

Specify the altitude breakpoints between mass balance gradients.

Methods

__init__(ela, gradient[, breakpoints, ...])	Initialise the mass balance from the ELA and the gradient.
add_random_climate(duration, ...)	Append a random climate to future of the mass balance of the glacier.
add_temp_bias(temp_bias, duration[, noise])	Add a gradual temperature bias to the mass balance of the glacier.
get_annual_mb(heights[, year])	Get the annual mass balance.
get_ela([year])	Compute the equilibrium line altitude for a given year.
get_monthly_mb(heights[, year])	Calculate the monthly mass balance for the glacier.
get_specific_mb([heights, widths, fls, year])	Specific mb for this year and a specific glacier geometry.
is_year_valid(year)	Checks if a given date year be simulated by this model.
reset()	Reset the mass balance to initial state.

Attributes

ela	Altitude of the equilibrium line altitude (m).
gradient	Mass balance altitude gradient, mm/m.
temp_bias	Current temperature bias applied to the mass balance (unit: °C)
temp_bias_series	Dataframe of historical and possible future temperature biases of the glacier.