کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1776942 | 1523652 | 2012 | 12 صفحه PDF | دانلود رایگان |
In this study, ground-based observations of equinox diurnal tide wind fields from the first CAWSES Global Tidal Campaign are compared with results from five commonly used models, in order to identify systematic differences. WACCM3 and Extended CMAM are both self-consistent general circulation models, which resolve general climatological features, while TIME-GCM can be forced to approximate specific conditions using reanalysis fields. GSWM is a linear mechanistic model; while GEWM is an empirical model derived from ground-based and satellite observations. The models resolve diurnal tides consistent in latitudinal structure with observations, dominated by the upward propagating (1,1) mode. There is disagreement in the magnitudes of the tidal amplitudes and vertical wavelengths, while differences in longitudinal tidal variability indicate differences in the nonmigrating tides in the models. These points suggest inconsistencies in model forcing, dissipation, and background winds that must be examined as part of a coordinated effort from the modeling community.
Research highlights
► The first CAWSES Global Tidal Campaign was performed during September–October 2005.
► Diurnal tidal winds from ground-based instruments and different models are compared.
► Models and observations consistent in showing bimodal latitudinal tidal structure.
► Disagreement in tidal amplitudes, vertical wavelength, and zonal variability.
► Coordinated effort needed to examine inconsistencies in model parameters.
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volumes 78–79, April 2012, Pages 19–30