An alternative PDD implementation which simulates a random process to get the number of PDDs. More...

Inheritance diagram for pism::surface::PDDrandMassBalance:

Public Types
enum	Kind { NOT_REPEATABLE = 0 , REPEATABLE = 1 }

Public Member Functions
	PDDrandMassBalance (Config::ConstPtr config, units::System::Ptr system, Kind kind)

virtual	~PDDrandMassBalance ()

virtual unsigned int	get_timeseries_length (double dt)

virtual void	get_PDDs (double dt_series, const std::vector< double > &S, const std::vector< double > &T, std::vector< double > &PDDs)

Public Member Functions inherited from pism::surface::PDDMassBalance
	PDDMassBalance (Config::ConstPtr config, units::System::Ptr system)

virtual	~PDDMassBalance ()

void	get_snow_accumulation (const std::vector< double > &T, std::vector< double > &precip_rate)
	Extract snow accumulation from mixed (snow and rain) precipitation using the temperature time-series. More...

Changes	step (const DegreeDayFactors &ddf, double PDDs, double ice_thickness, double firn_depth, double snow_depth, double accumulation)
	Compute the surface mass balance at a location from the number of positive degree days and the accumulation amount in a time interval. More...

Public Member Functions inherited from pism::surface::LocalMassBalance
	LocalMassBalance (Config::ConstPtr config, units::System::Ptr system)

virtual	~LocalMassBalance ()=default

std::string	method () const

Protected Attributes
Impl *	m_impl

Protected Attributes inherited from pism::surface::PDDMassBalance
bool	precip_as_snow
	interpret all the precipitation as snow (no rain) More...

bool	refreeze_ice_melt
	refreeze melted ice More...

double	Tmin
	the temperature below which all precipitation is snow More...

double	Tmax
	the temperature above which all precipitation is rain More...

double	pdd_threshold_temp
	threshold temperature for the PDD computation More...

Protected Attributes inherited from pism::surface::LocalMassBalance
std::string	m_method

const Config::ConstPtr	m_config

const units::System::Ptr	m_unit_system

const double	m_seconds_per_day

Detailed Description

An alternative PDD implementation which simulates a random process to get the number of PDDs.

Uses a GSL random number generator. Significantly slower because new random numbers are generated for each grid point.

The way the number of positive degree-days are used to produce a surface mass balance is identical to the base class PDDMassBalance.

Note: A more realistic pattern for the variability of surface melting might have correlation with appropriate spatial and temporal ranges.

Definition at line 179 of file localMassBalance.hh.

The documentation for this class was generated from the following files:

Classes