caa a22 4500 469052511 CHVBK 20180323132834.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01026017 doi (NATIONALLICENCE)springer-10.1007/BF01026017 Energy cycle diagnosis of two versions of a low resolution GCM [Elektronische Daten] [U. Ulbrich, M. Ponater] Summary: The atmospheric energy cycle of stationary and transient waves as computed from ECMWF analysis data (1980-1987) is compared to results from two control integrations of the Hamburg T21-version of the ECMWF model. The first of these runs was carried out in 1986 with ECMWF "cycle 17” parameterization. The more recent control-run was carried out in 1990 with the so-called ECHAM2-version of the model. Considerable changes have been introduced to the parameterization and numerical problems inherent in the model's code have been removed. Systematic errors of the globally integrated reservoirs of zonal available potential and kinetic energy are reduced by up to 50% compared to those produced by the older model. However, there is no thorough improvement with respect to reservoirs and conversions assigned to stationary and transient waves. When looking at zonal mean contributions it becomes clear that only certain features of the general circulation are closer to reality while others are left unchanged. For some parameters local departures from reality are even larger in the new version. Occasionally, partial improvements may lead to deterioration of global integral values because of cancellation of errors in the older model. Evidence is shown that many changes of local contributions to energy reservoirs and conversions are related to changes in model parameterization. Major importance is assigned to changes in the cloud and radiation scheme and to the introduction of a modified horizontal diffusion. The model's reaction on these external changes appears to be reasonable on the basis of physical arguments. It is concluded, that with careful study of its contributions the atmospheric energy cycle is a suitable diagnostic tool to understand a GCM's overall reaction on modifications of parameterized processes. Springer-Verlag, 1992 Ulbrich U. Institut für Geophysik und Meteorologie, Universität zu Köln, Kerpener Straße 13, D-W-5000, Köln 41, Federal Republic of Germany aut Ponater M. Meteorologisches Institut der Universität Hamburg, Federal Republic of Germany aut Meteorology and Atmospheric Physics Springer-Verlag 50/4(1992-12-01), 197-210 0177-7971 50:4<197 1992 50 703 https://doi.org/10.1007/BF01026017 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01026017 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ulbrich U. Institut für Geophysik und Meteorologie, Universität zu Köln, Kerpener Straße 13, D-W-5000, Köln 41, Federal Republic of Germany aut NATIONALLICENCE 700 1- Ponater M. Meteorologisches Institut der Universität Hamburg, Federal Republic of Germany aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 50/4(1992-12-01), 197-210 0177-7971 50:4<197 1992 50 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer