Anomaly.cc

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// Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022, 2023, 2024, 2025 PISM Authors
//
// This file is part of PISM.
//
// PISM is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation; either version 3 of the License, or (at your option) any later
// version.
//
// PISM is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License
// along with PISM; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
#include "pism/coupler/surface/Anomaly.hh"
#include "pism/util/Grid.hh"
#include "pism/coupler/util/options.hh"
#include "pism/util/array/Forcing.hh"
#include "pism/util/Logger.hh"
#include "pism/util/io/IO_Flags.hh"
 
namespace pism {
namespace surface {
 
Anomaly::Anomaly(std::shared_ptr<const Grid> g, std::shared_ptr<SurfaceModel> in)
  : SurfaceModel(g, in) {
 
  ForcingOptions opt(*m_grid->ctx(), "surface.anomaly");
 
  {
    unsigned int buffer_size = m_config->get_number("input.forcing.buffer_size");
 
    File file(m_grid->com, opt.filename, io::PISM_NETCDF3, io::PISM_READONLY);
 
    m_ice_surface_temp_anomaly = std::make_shared<array::Forcing>(m_grid,
                                                             file,
                                                             "ice_surface_temp_anomaly",
                                                             "", // no standard name
                                                             buffer_size,
                                                             opt.periodic,
                                                             LINEAR);
 
    m_climatic_mass_balance_anomaly = std::make_shared<array::Forcing>(m_grid,
                                                                  file,
                                                                  "climatic_mass_balance_anomaly",
                                                                  "", // no standard name
                                                                  buffer_size,
                                                                  opt.periodic);
  }
 
  m_ice_surface_temp_anomaly->metadata(0)
      .long_name(
          "anomaly of the temperature of the ice at the ice surface but below firn processes")
      .units("kelvin");
 
  m_climatic_mass_balance_anomaly->metadata(0)
      .long_name("anomaly of the surface mass balance (accumulation/ablation) rate")
      .units("kg m^-2 s^-1")
      .output_units("kg m^-2 year^-1");
 
  m_mass_flux = allocate_mass_flux(g);
  m_temperature = allocate_temperature(g);
 
  m_accumulation = allocate_accumulation(g);
  m_melt         = allocate_melt(g);
  m_runoff       = allocate_runoff(g);
}
 
void Anomaly::init_impl(const Geometry &geometry) {
 
  if (m_input_model) {
    m_input_model->init(geometry);
  }
 
  m_log->message(2,
                 "* Initializing the '-surface ...,anomaly' modifier...\n");
 
  ForcingOptions opt(*m_grid->ctx(), "surface.anomaly");
 
  m_log->message(2,
                 "    reading anomalies from %s ...\n", opt.filename.c_str());
 
  m_ice_surface_temp_anomaly->init(opt.filename, opt.periodic);
  m_climatic_mass_balance_anomaly->init(opt.filename, opt.periodic);
}
 
void Anomaly::update_impl(const Geometry &geometry, double t, double dt) {
  m_input_model->update(geometry, t, dt);
 
  m_climatic_mass_balance_anomaly->update(t, dt);
  m_ice_surface_temp_anomaly->update(t, dt);
 
  m_climatic_mass_balance_anomaly->average(t, dt);
  m_ice_surface_temp_anomaly->average(t, dt);
 
  m_input_model->mass_flux().add(1.0, *m_climatic_mass_balance_anomaly,
                                 *m_mass_flux);
  m_input_model->temperature().add(1.0, *m_ice_surface_temp_anomaly,
                                   *m_temperature);
 
  dummy_accumulation(*m_mass_flux, *m_accumulation);
  dummy_melt(*m_mass_flux, *m_melt);
  dummy_runoff(*m_mass_flux, *m_runoff);
}
 
const array::Scalar &Anomaly::mass_flux_impl() const {
  return *m_mass_flux;
}
 
const array::Scalar &Anomaly::temperature_impl() const {
  return *m_temperature;
}
 
const array::Scalar &Anomaly::accumulation_impl() const {
  return *m_accumulation;
}
 
const array::Scalar &Anomaly::melt_impl() const {
  return *m_melt;
}
 
const array::Scalar &Anomaly::runoff_impl() const {
  return *m_runoff;
}
 
} // end of namespace surface
} // end of namespace pism