To validate the atmospheric general circulation models ECHAM5-wiso and ECHAM6-wiso, supplemented with isotopic modules, a simulation was performed in the nudging mode to known values of temperature, pressure, speed and wind direction obtained from a retrospective analysis. The simulation results were compared with the data on the isotopic composition (δHDO and δH218O) of water vapor and precipitation at the monitoring station in Labytnangi (66.660°N, 66.409°E).
In order to validate the isotopic models of the general circulation of the atmosphere ECHAM5-wiso and ECHAM6-wiso, modeling in nudging mode was made. These model data were compared with experimental data on the isotope composition (δHDO and δH218O) of precipitation for stations in the foothills of Altai mountains (52.596° N, 85.25° E) created and maintained by the Institute for Water and Environmental Problems SB RAS.
In order to validate the isotopic model of the general circulation of the atmosphere ECHAM6-wiso, modeling in nudging mode with data from reanalysis ERA5 was made. These model data were compared with experimental data on the isotope composition (δHDO and δH2 18O) of water vapor in atmospheric air for stations in Labytnangi and in Igarka created and maintained by the Climate and Environment Physics Laboratory INS UrFU and on Samoylov island, supported by the Trofimuk Institute of Petroleum Geology and Geophysics of SB RAS and the Alfred Wegener Institute (Germany), and with experimental data on the isotope composition of precipitation for the station in Labytnangi.
In order to validate the isotopic model of the general circulation of the atmosphere ECHAM5-wiso, a comparison of the model and experimental data on the isotope composition (δHDO and δH218O) of precipitation and water vapor in atmospheric air at the surface for three Arctic observation stations was made. Experimental data on the isotope composition of water vapor were obtained at climate monitoring stations created and maintained by the Climate and Environment Physics Laboratory INS UrFU in Labytnangi and in Igarka, as well as the station located on Samoylov island, supported by the Melnikov Permafrost Institute of SB RAS and the Helmholz centre for polar and marine research, the Alfred Wegener Institute (Germany)
Dependences of monthly means of regional averages of model atmospheric parameters on initial and boundary condition remoteness in the past are the subject of the study. We used atmospheric general circulation model ECHAM5-wiso for simulation of monthly means of regional averages of climate parameters for Yamal region and different periods of premodeling. Time interval was varied from several months to 12 years. We present dependences of model monthly means of regional averages of surface temperature, 2 m air temperature and humidity for December of 2000 on duration of premodeling. Comparison of these results with reanalysis data showed that best coincidence with true parameters could be reached if duration of pre-modelling is approximately 10 years.
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