RT Dissertation/Thesis
T1 The impact of wave number selection and spin-up time in spectral nudging
A1 Gómez Hombre, Breogán Xacobo
K1 Spectral
K1 Nudging
K1 Wave
K1 Atmospheric
K1 Modelling
AB The present work studies two relevant parameters from spectral nudging. First, thecut-off wave number, which effectively separates the nudged scales from the freerunning ones. And, second, the spin-up time, which determines how much time isneeded to reach a balance between the nudging force and the model internal climate.Our results show that the optimal cut-off wave number coincides with the RossbyRadius of Deformation, both in mid and tropical latitudes, suggesting that thisparameter is related with the dynamic characteristics of the modelled area, and not withfeatures of the experiment design. The optimal spin-up time is found to be 24/48h formid latitudes and 72/96h for tropical latitudes.We also study the suitability of spectral nudging as an initialisation technique. Ourresults indicate that it is beneficial to use some nudging technique at the beginning ofthe simulation, but we have not found relevant differences between grid nudging andspectral nudging.
YR 2019
FD 2019
LK http://hdl.handle.net/10347/19894
UL http://hdl.handle.net/10347/19894
LA eng
DS Minerva
RD 22 abr 2026