edu.ucar.opensky::technotes:289 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T17:21:39.380355 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7b857hh The Mechanism of Meteorological Noise 1983-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7b857hh https://doi.org/10.5065/D6FT8HZ1 Hinkelmann, K. author Rasch, P. author Kiehl, J. author Wyman, J. author UCAR/NCAR - Library publisher Using a simple atmospheric model, the difference between the solutions of the primitive and the quasi-hydrostatic equations is demonstrated. The results.show that the quasi-hydrostatic processes are largely determined by the initial field of pressure wherever the meteorological "noise"-phenomena (in the form of short-period oscillations about a trend of the meteorological elements) depend on the initial field of the non-geostrophic wind components. This trend can be computed with sufficient accuracy also by a numerical integration of the primitive equations, which are mathematically simpler to handle than the quasi-hydrostatic equations. In this case the initial wind fields can be computed from the observed pressure field by using the geostrophic approximation. To find the trend the results have to be smoothed. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Weather research/forecast models Oscillations theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation