Validation of AGCMs ECHAM using laser spectrometer data obtained at two Arctic stations
N.Yu. Denisova1,2, K.G. Gribanov1, M. Werner3
1Institute of Natural Sciences, Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
2N.N. Krasovskii Institute of Mathematics and Mechanics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
3Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Keywords: модель общей циркуляции атмосферы, изотопологи воды, atmospheric general circulation model, water isotopologues
Abstract
To validate the atmospheric general circulation models ECHAM5-wiso and ECHAM6-wiso with embedded water isotopic modules, the simulation with nudging to known fields of temperature, pressure, wind speed and direction obtained from retrospective climate analysis was performed. The simulation results were compared with data on the isotopic composition (dHDO and dH218O) of water vapor in atmospheric air near the surface obtained at two monitoring stations: in Labytnangi (66.660N, 66.409E) and in Igarka (67.453N, 86.535E). An unambiguous conclusion about the superiority of the newer model ECHAM6-wiso could not be made, because the simulation results with its use demonstrate a better agreement with the values observed in Igarka, while the model ECHAM5-wiso shows a better agreement with the values observed in Labytnangi. The simulation results can be used as an a priori ensemble for solving inverse problems of remote sensing of the atmosphere in Western Siberia.
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