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/atmosphere/Anomaly.hh"
 
#include "pism/util/Config.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 atmosphere {
 
Anomaly::Anomaly(std::shared_ptr<const Grid> g, std::shared_ptr<AtmosphereModel> in)
  : AtmosphereModel(g, in) {
 
  ForcingOptions opt(*m_grid->ctx(), "atmosphere.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_air_temp_anomaly = std::make_shared<array::Forcing>(m_grid,
                                                     file,
                                                     "air_temp_anomaly",
                                                     "", // no standard name
                                                     buffer_size,
                                                     opt.periodic,
                                                     LINEAR);
 
    m_precipitation_anomaly = std::make_shared<array::Forcing>(m_grid,
                                                          file,
                                                          "precipitation_anomaly",
                                                          "", // no standard name
                                                          buffer_size,
                                                          opt.periodic);
  }
 
  m_air_temp_anomaly->metadata(0)
      .long_name("anomaly of the near-surface air temperature")
      .units("kelvin");
 
  m_precipitation_anomaly->metadata(0)
      .long_name("anomaly of the ice-equivalent precipitation rate")
      .units("kg m^-2 second^-1")
      .output_units("kg m^-2 year^-1");
 
  m_precipitation = allocate_precipitation(g);
  m_temperature   = allocate_temperature(g);
}
 
void Anomaly::init_impl(const Geometry &geometry) {
  m_input_model->init(geometry);
 
  ForcingOptions opt(*m_grid->ctx(), "atmosphere.anomaly");
 
  m_log->message(2,
                 "* Initializing the -atmosphere ...,anomaly code...\n");
 
  m_log->message(2,
                 "    reading anomalies from %s ...\n",
                 opt.filename.c_str());
 
  m_air_temp_anomaly->init(opt.filename, opt.periodic);
  m_precipitation_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_precipitation_anomaly->update(t, dt);
  m_air_temp_anomaly->update(t, dt);
 
  m_precipitation_anomaly->average(t, dt);
  m_air_temp_anomaly->average(t, dt);
 
  // precipitation
  {
    m_precipitation->copy_from(m_input_model->precipitation());
    m_precipitation->add(1.0, *m_precipitation_anomaly);
  }
 
  // temperature
  {
    m_temperature->copy_from(m_input_model->air_temperature());
    m_temperature->add(1.0, *m_air_temp_anomaly);
  }
}
 
const array::Scalar& Anomaly::precipitation_impl() const {
  return *m_precipitation;
}
 
const array::Scalar& Anomaly::air_temperature_impl() const {
  return *m_temperature;
}
 
void Anomaly::begin_pointwise_access_impl() const {
  m_input_model->begin_pointwise_access();
  m_air_temp_anomaly->begin_access();
  m_precipitation_anomaly->begin_access();
}
 
void Anomaly::end_pointwise_access_impl() const {
  m_input_model->end_pointwise_access();
  m_precipitation_anomaly->end_access();
  m_air_temp_anomaly->end_access();
}
 
void Anomaly::init_timeseries_impl(const std::vector<double> &ts) const {
  AtmosphereModel::init_timeseries_impl(ts);
 
  m_air_temp_anomaly->init_interpolation(ts);
 
  m_precipitation_anomaly->init_interpolation(ts);
}
 
void Anomaly::temp_time_series_impl(int i, int j, std::vector<double> &result) const {
  m_input_model->temp_time_series(i, j, result);
 
  m_temp_anomaly.reserve(m_ts_times.size());
  m_air_temp_anomaly->interp(i, j, m_temp_anomaly);
 
  for (unsigned int k = 0; k < m_ts_times.size(); ++k) {
    result[k] += m_temp_anomaly[k];
  }
}
 
void Anomaly::precip_time_series_impl(int i, int j, std::vector<double> &result) const {
  m_input_model->precip_time_series(i, j, result);
 
  m_mass_flux_anomaly.reserve(m_ts_times.size());
  m_precipitation_anomaly->interp(i, j, m_mass_flux_anomaly);
 
  for (unsigned int k = 0; k < m_ts_times.size(); ++k) {
    result[k] += m_mass_flux_anomaly[k];
  }
}
 
} // end of namespace atmosphere
} // end of namespace pism