| 1 | %SMBsemic Class definition
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| 2 | %
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| 3 | % Usage:
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| 4 | % SMBsemic=SMBsemic();
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| 5 |
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| 6 | classdef SMBsemic
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| 7 | properties (SetAccess=public)
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| 8 | dailysnowfall = NaN;
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| 9 | dailyrainfall = NaN;
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| 10 | dailydsradiation = NaN;
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| 11 | dailydlradiation = NaN;
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| 12 | dailywindspeed = NaN;
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| 13 | dailypressure = NaN;
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| 14 | dailyairdensity = NaN;
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| 15 | dailyairhumidity = NaN;
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| 16 | dailytemperature = NaN;
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| 17 | Tamp = NaN;
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| 18 | mask = NaN;
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| 19 | hice = NaN;
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| 20 | hsnow = NaN;
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| 21 | desfac = 0;
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| 22 | desfacElevation = 0;
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| 23 | rlaps = 0;
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| 24 | rdl = 0;
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| 25 | s0gcm = NaN;
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| 26 | steps_per_step = 1;
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| 27 | averaging = 0;
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| 28 | requested_outputs = {};
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| 29 |
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| 30 | hcrit = 0;
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| 31 | rcrit = 0;
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| 32 |
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| 33 | % albedo
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| 34 | albedo = 0; % required for first energy balance calculation of SEMIC
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| 35 | albedo_snow = 0; % required for ISBA method
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| 36 | albedo_scheme = 0;
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| 37 | alb_smax = NaN;
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| 38 | alb_smin = NaN;
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| 39 | albi = NaN;
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| 40 | albl = NaN;
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| 41 |
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| 42 | % albedo parameters depending on albedo_scheme
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| 43 | % for slater
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| 44 | tmin = NaN;
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| 45 | tmax = NaN;
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| 46 |
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| 47 | % for isba & denby method
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| 48 | mcrit = NaN;
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| 49 |
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| 50 | % for isba
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| 51 | tau_a = NaN;
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| 52 | tau_f = NaN;
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| 53 | wcrit = NaN;
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| 54 |
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| 55 | % for alex
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| 56 | tmid = NaN;
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| 57 | afac = NaN;
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| 58 |
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| 59 | % method
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| 60 | ismethod = 0;
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| 61 | end
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| 62 | methods
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| 63 | function self = SMBsemic(varargin) % {{{
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| 64 | switch nargin
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| 65 | case 0
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| 66 | self=setdefaultparameters(self);
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| 67 | otherwise
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| 68 | error('constructor not supported');
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| 69 | end
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| 70 | end % }}}
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| 71 | function self = extrude(self,md) % {{{
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| 72 | self.dailysnowfall=project3d(md,'vector',self.dailysnowfall,'type','node');
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| 73 | self.dailyrainfall=project3d(md,'vector',self.dailyrainfall,'type','node');
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| 74 | self.dailydsradiation=project3d(md,'vector',self.dailydsradiation,'type','node');
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| 75 | self.dailydlradiation=project3d(md,'vector',self.dailydlradiation,'type','node');
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| 76 | self.dailywindspeed=project3d(md,'vector',self.dailywindspeed,'type','node');
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| 77 | self.dailypressure=project3d(md,'vector',self.dailypressure,'type','node');
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| 78 | self.dailyairdensity=project3d(md,'vector',self.dailyairdensity,'type','node');
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| 79 | self.dailyairhumidity=project3d(md,'vector',self.dailyairhumidity,'type','node');
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| 80 | self.dailytemperature=project3d(md,'vector',self.dailytemperature,'type','node');
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| 81 | self.s0gcm=project3d(md,'vector',self.s0gcm,'type','node');
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| 82 |
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| 83 | end % }}}
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| 84 | function list = defaultoutputs(self,md) % {{{
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| 85 | list = {'SmbMassBalance'};
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| 86 | end % }}}
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| 87 | function list = outputlists(self,md) % {{{
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| 88 | if self.ismethod == 1
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| 89 | list = {'SmbMassBalance','SmbMassBalanceSnow','SmbMelt','SmbAccumulation',...
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| 90 | 'SmbHIce','SmbHSnow','SmbAlbedo','SmbAlbedoSnow','TemperatureSEMIC'};
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| 91 | else
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| 92 | list = {'SmbMassBalance'};
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| 93 | end
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| 94 | end % }}}
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| 95 | function self = initialize(self,md) % {{{
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| 96 |
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| 97 | if isnan(self.s0gcm),
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| 98 | self.s0gcm=zeros(md.mesh.numberofvertices,1);
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| 99 | disp(' no SMBsemic.s0gcm specified: values set as zero');
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| 100 | end
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| 101 | self.Tamp = 3*ones(md.mesh.numberofvertices,1);
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| 102 | %self.albedo = 0.8*ones(md.mesh.numberofvertices,1);
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| 103 | %self.albedo_snow= 0.5*ones(md.mesh.numberofvertices,1);
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| 104 | self.hice = zeros(md.mesh.numberofvertices,1);
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| 105 | self.hsnow = 5*ones(md.mesh.numberofvertices,1);
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| 106 | end % }}}
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| 107 | function self = setdefaultparameters(self) % {{{
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| 108 |
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| 109 | % albedo parameters
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| 110 | self.albedo_scheme = 0;
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| 111 | self.alb_smax = 0.79;
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| 112 | self.alb_smin = 0.6;
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| 113 | self.albi = 0.41;
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| 114 | self.albl = 0.07;
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| 115 |
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| 116 | % albedo parameters for?
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| 117 | % for slater
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| 118 | self.tmin = 263.15;
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| 119 | self.tmax = 273.15;
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| 120 | % for isba & denby
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| 121 | self.mcrit = 6e-8;
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| 122 | % for isba
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| 123 | self.tau_a = 0.008;
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| 124 | self.tau_f = 0.24;
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| 125 | self.wcrit = 15.0;
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| 126 | % for alex
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| 127 | self.tmid = 273.35;
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| 128 | self.afac = -0.18;
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| 129 |
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| 130 | self.hcrit = 0.028;% from Krapp et al. (2017)
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| 131 | self.rcrit = 0.85; % from Krapp et al. (2017)
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| 132 |
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| 133 | self.desfac = -log(2.0)/1000;
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| 134 | self.desfacElevation = 2000;
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| 135 | self.rlaps = 7.4;
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| 136 | self.rdl = 0.29;
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| 137 |
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| 138 | self.ismethod = 0;
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| 139 | self.requested_outputs={'default'};
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| 140 | end % }}}
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| 141 | function md = checkconsistency(self,md,solution,analyses) % {{{
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| 142 |
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| 143 | if ismember('MasstransportAnalysis',analyses),
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| 144 | md = checkfield(md,'fieldname','smb.desfac','<=',1,'numel',1);
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| 145 | md = checkfield(md,'fieldname','smb.s0gcm','>=',0,'NaN',1,'Inf',1,'size',[md.mesh.numberofvertices 1]);
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| 146 | md = checkfield(md,'fieldname','smb.rlaps','>=',0,'numel',1);
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| 147 | md = checkfield(md,'fieldname','smb.rdl','>=',0,'numel',1);
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| 148 | md = checkfield(md,'fieldname','smb.dailysnowfall','timeseries',1,'NaN',1,'Inf',1);
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| 149 | md = checkfield(md,'fieldname','smb.dailyrainfall','timeseries',1,'NaN',1,'Inf',1);
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| 150 | md = checkfield(md,'fieldname','smb.dailydsradiation','timeseries',1,'NaN',1,'Inf',1);
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| 151 | md = checkfield(md,'fieldname','smb.dailydlradiation','timeseries',1,'NaN',1,'Inf',1);
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| 152 | md = checkfield(md,'fieldname','smb.dailywindspeed','timeseries',1,'NaN',1,'Inf',1);
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| 153 | md = checkfield(md,'fieldname','smb.dailypressure','timeseries',1,'NaN',1,'Inf',1);
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| 154 | md = checkfield(md,'fieldname','smb.dailyairdensity','timeseries',1,'NaN',1,'Inf',1);
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| 155 | md = checkfield(md,'fieldname','smb.dailyairhumidity','timeseries',1,'NaN',1,'Inf',1);
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| 156 | md = checkfield(md,'fieldname','smb.dailytemperature','timeseries',1,'NaN',1,'Inf',1);
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| 157 |
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| 158 | % TODO: transient model should be merged with SEMIC developed by Ruckamp et al. (2018)
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| 159 |
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| 160 | md = checkfield(md,'fieldname','smb.ismethod','numel',1,'values',[0,1]);
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| 161 | if self.ismethod == 1 % transient mode
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| 162 | md = checkfield(md,'fieldname','smb.desfacElevation','>=',0,'numel',1);
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| 163 |
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| 164 | md = checkfield(md,'fieldname','smb.albedo_scheme','NaN',1,'Inf',1,'numel',1,'values',[0,1,2,3,4]);
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| 165 | md = checkfield(md,'fieldname','smb.alb_smax','>=',0,'NaN',1,'Inf',1,'numel',1);
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| 166 | md = checkfield(md,'fieldname','smb.mask','NaN',1,'Inf',1,'size',[md.mesh.numberofvertices, 1],'values',[0,1,2]);
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| 167 |
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| 168 | % initial values
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| 169 | md = checkfield(md,'fieldname','smb.albedo','NaN',1,'Inf',1,'size',[md.mesh.numberofvertices, 1]);
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| 170 | md = checkfield(md,'fieldname','smb.albedo_snow','NaN',1,'Inf',1,'size',[md.mesh.numberofvertices, 1]);
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| 171 | md = checkfield(md,'fieldname','smb.alb_smax','>=',0,'<=',1,'NaN',1,'Inf',1,'numel',1);
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| 172 | md = checkfield(md,'fieldname','smb.alb_smin','>=',0,'<=',1,'NaN',1,'Inf',1,'numel',1);
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| 173 | md = checkfield(md,'fieldname','smb.albi','>=',0,'<=',1,'NaN',1,'Inf',1,'numel',1);
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| 174 | md = checkfield(md,'fieldname','smb.albl','>=',0,'<=',1,'NaN',1,'Inf',1,'numel',1);
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| 175 | md = checkfield(md,'fieldname','smb.hice','NaN',1,'Inf',1,'size',[md.mesh.numberofvertices, 1]);
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| 176 | md = checkfield(md,'fieldname','smb.hsnow','NaN',1,'Inf',1,'size',[md.mesh.numberofvertices, 1]);
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| 177 | end
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| 178 | end
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| 179 | md = checkfield(md,'fieldname','smb.steps_per_step','>=',1,'numel',[1]);
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| 180 | md = checkfield(md,'fieldname','smb.averaging','numel',[1],'values',[0 1 2]);
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| 181 | md = checkfield(md,'fieldname','smb.requested_outputs','stringrow',1);
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| 182 |
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| 183 | end % }}}
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| 184 | function disp(self) % {{{
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| 185 | disp(sprintf(' surface forcings parameters:'));
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| 186 |
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| 187 | disp(sprintf(' Interface for coupling GCM data to the energy balance model SEMIC (Krapp et al (2017) https://doi.org/10.5194/tc-11-1519-2017).'));
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| 188 | disp(sprintf(' The implemented coupling uses daily mean GCM input to calculate yearly mean smb, accumulation, ablation, and surface temperature.'));
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| 189 | disp(sprintf(' smb and temperatures are updated every year'));
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| 190 | disp(sprintf('\n SEMIC parameters:'));
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| 191 | fielddisplay(self,'dailysnowfall','daily surface dailysnowfall [m/s]');
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| 192 | fielddisplay(self,'dailyrainfall','daily surface dailyrainfall [m/s]');
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| 193 | fielddisplay(self,'dailydsradiation','daily downwelling shortwave radiation [W/m2]');
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| 194 | fielddisplay(self,'dailydlradiation','daily downwelling longwave radiation [W/m2]');
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| 195 | fielddisplay(self,'dailywindspeed','daily surface wind speed [m/s]');
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| 196 | fielddisplay(self,'dailypressure','daily surface pressure [Pa]');
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| 197 | fielddisplay(self,'dailyairdensity','daily air density [kg/m3]');
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| 198 | fielddisplay(self,'dailyairhumidity','daily air specific humidity [kg/kg]');
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| 199 | fielddisplay(self,'dailytemperature','daily surface air temperature [K]');
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| 200 | fielddisplay(self,'rlaps','present day lapse rate (default is 7.4 [degree/km]; Erokhina et al. 2017)');
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| 201 | fielddisplay(self,'desfac','desertification elevation factor (default is -log(2.0)/1000 [1/km]; Vizcaino et al. 2010)');
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| 202 | fielddisplay(self,'rdl','longwave downward radiation decrease (default is 0.29 [W/m^2/km]; Marty et al. 2002)');
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| 203 | fielddisplay(self,'s0gcm','GCM reference elevation; (default is 0) [m]');
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| 204 |
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| 205 | fielddisplay(self,'ismethod','method for calculating SMB with SEMIC. Default version of SEMIC is really slow. 0: steady, 1: transient (default: 0)');
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| 206 | if self.ismethod == 1 % transient mode
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| 207 | fielddisplay(self,'desfacElevation','desertification elevation (default is 2000 m; Vizcaino et al. 2010)');
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| 208 | fielddisplay(self,'Tamp','amplitude of diurnal cycle [K]');
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| 209 | fielddisplay(self,'albedo','initial albedo [no unit]');
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| 210 | fielddisplay(self,'albedo_snow','initial albedo for snow [no unit]');
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| 211 | fielddisplay(self,'hice','initial thickness of ice [unit: m]');
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| 212 | fielddisplay(self,'hsnow','initial thickness of snow [unit: m]');
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| 213 | fielddisplay(self,'mask','masking for albedo. 0: ocean, 1: land, 2: ice (default: 2)');
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| 214 | fielddisplay(self,'hcrit','critical snow height for albedo [unit: m]');
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| 215 | fielddisplay(self,'rcrit','critical refreezing height for albedo [no unit]');
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| 216 |
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| 217 | disp(sprintf('\nSEMIC albedo parameters.'));
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| 218 | fielddisplay(self,'albedo_scheme','albedo scheme for SEMIC. 0: none, 1: slater, 2: isba, 3: denby, 4: alex (default is 0)');
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| 219 | fielddisplay(self,'alb_smax','maximum snow albedo (default: 0.79)');
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| 220 | fielddisplay(self,'alb_smin','minimum snow albedo (default: 0.6)');
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| 221 | fielddisplay(self,'albi','background albedo for bare ice (default: 0.41)');
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| 222 | fielddisplay(self,'albl','background albedo for bare land (default: 0.07)');
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| 223 | end
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| 224 | % albedo_scheme - 0: none, 1: slater, 2: isba, 3: denby, 4: alex.
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| 225 | if self.albedo_scheme == 1
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| 226 | disp(sprintf('\n\tSEMIC snow albedo parameters for Slater et al, (1998).'));
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| 227 | disp(sprintf('\t alb = alb_smax - (alb_smax - alb_smin)*tm^(3.0)'))
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| 228 | disp(sprintf('\t tm = 1 (tsurf > 273.15 K)'));
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| 229 | disp(sprintf('\t tm = f*(tsurf-tmin) (tmin <= tsurf < 273.15)'));
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| 230 | disp(sprintf('\t 0 (tsurf < tmin)'));
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| 231 | disp(sprintf('\t f = 1/(273.15-tmin)'));
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| 232 | fielddisplay(self,'tmin','minimum temperature for which albedo decline become effective. (default: 263.15 K)[unit: K])');
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| 233 | fielddisplay(self,'tmax','maxmium temperature for which albedo decline become effective. This value should be fixed. (default: 273.15 K)[unit: K])');
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| 234 | elseif self.albedo_scheme == 2,
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| 235 | disp(sprintf('\n\tSEMIC snow albedo parameters for ISBA.? where is citation?'));
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| 236 | fielddisplay(self,'mcrit','critical melt rate (default: 6e-8) [unit: m/sec]');
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| 237 | fielddisplay(self,'wcrit','critical liquid water content (default: 15) [unit: kg/m2]');
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| 238 | fielddisplay(self,'tau_a','dry albedo decline [unit: 1/day]');
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| 239 | fielddisplay(self,'tau_f','wet albedo decline [unit: 1/day]');
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| 240 | elseif self.albedo_scheme == 3,
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| 241 | disp(sprintf('\n\tSEMIC snow albedo parameters for Denby et al. (2002 Tellus)'));
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| 242 | fielddisplay(self,'mcrit','critical melt rate (default: 6e-8) [unit: m/sec]');
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| 243 | elseif self.albedo_scheme == 4,
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| 244 | disp(sprintf('\n\tSEMIC snow albedo parameters for Alex.?'));
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| 245 | fielddisplay(self,'afac','[unit: ?]');
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| 246 | fielddisplay(self,'tmid','[unit: ?]');
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| 247 | else
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| 248 | error(sprintf('ERROR: %d is not supported albedom scheme.',self.albedo_scheme))
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| 249 | end
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| 250 |
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| 251 | fielddisplay(self, 'steps_per_step', 'number of smb steps per time step');
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| 252 | fielddisplay(self, 'averaging', 'averaging methods from short to long steps');
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| 253 | disp(sprintf('%51s 0: Arithmetic (default)',' '));
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| 254 | disp(sprintf('%51s 1: Geometric',' '));
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| 255 | disp(sprintf('%51s 2: Harmonic',' '));
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| 256 | fielddisplay(self,'requested_outputs','additional outputs requested');
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| 257 | end % }}}
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| 258 | function marshall(self,prefix,md,fid) % {{{
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| 259 |
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| 260 | yts=md.constants.yts;
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| 261 |
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| 262 | WriteData(fid,prefix,'name','md.smb.model','data',12,'format','Integer');
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| 263 |
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| 264 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','ismethod','format','Integer','values',[0, 1]);
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| 265 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','desfac','format','Double');
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| 266 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','desfacElevation','format','Double');
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| 267 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','s0gcm','format','DoubleMat','mattype',1);
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| 268 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','rlaps','format','Double');
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| 269 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','rdl','format','Double');
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| 270 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailysnowfall','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 271 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailyrainfall','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 272 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailydsradiation','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 273 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailydlradiation','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 274 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailywindspeed','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 275 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailypressure','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 276 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailyairdensity','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 277 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailyairhumidity','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 278 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','dailytemperature','format','DoubleMat','mattype',1,'timeserieslength',md.mesh.numberofvertices+1,'yts',yts);
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| 279 | % TODO: transient mode should be merged with SEMIC developed by Ruckamp et al. (2018).
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| 280 | if self.ismethod == 1% transient mode
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| 281 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','Tamp','format','DoubleMat','mattype',1);
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| 282 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','mask','format','DoubleMat','mattype',1);
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| 283 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','hice','format','DoubleMat','mattype',1);
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| 284 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','hsnow','format','DoubleMat','mattype',1);
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| 285 |
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| 286 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','hcrit','format','Double');
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| 287 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','rcrit','format','Double');
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| 288 |
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| 289 | %albedo
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| 290 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','albedo','format','DoubleMat','mattype',1);
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| 291 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','albedo_snow','format','DoubleMat','mattype',1);
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| 292 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','albedo_scheme','format','Integer');
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| 293 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','albi','format','Double');
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| 294 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','albl','format','Double');
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| 295 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','alb_smin','format','Double');
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| 296 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','alb_smax','format','Double');
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| 297 |
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| 298 | %albedo parameters for ?
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| 299 | %for slater
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| 300 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','tmin','format','Double');
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| 301 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','tmax','format','Double');
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| 302 | %for isba & denby
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| 303 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','mcrit','format','Double');
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| 304 | %for isba
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| 305 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','wcrit','format','Double');
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| 306 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','tau_a','format','Double');
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| 307 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','tau_f','format','Double');
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| 308 | %for alex
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| 309 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','tmid','format','Double');
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| 310 | WriteData(fid,prefix,'object',self,'class','smb','fieldname','afac','format','Double');
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| 311 | end
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| 312 |
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| 313 | WriteData(fid,prefix,'object',self,'fieldname','steps_per_step','format','Integer');
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| 314 | WriteData(fid,prefix,'object',self,'fieldname','averaging','format','Integer');
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| 315 |
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| 316 | %process requested outputs
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| 317 | outputs = self.requested_outputs;
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| 318 | pos = find(ismember(outputs,'default'));
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| 319 | if ~isempty(pos),
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| 320 | outputs(pos) = []; %remove 'default' from outputs
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| 321 | outputs = [outputs defaultoutputs(self,md)]; %add defaults
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| 322 | end
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| 323 | WriteData(fid,prefix,'data',outputs,'name','md.smb.requested_outputs','format','StringArray');
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| 324 |
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| 325 | end % }}}
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| 326 | end
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|---|
| 327 | end
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