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Título:
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Kinetic energy-conserving hyperdiffusion can improve low resolution atmospheric models
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Autores:
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Zurita Gotor, Pablo ;
Held, Isaac M. ;
Jansen, Malte F.
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Tipo de documento:
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texto impreso
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Editorial:
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American Geophysical Union, 2015-09
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Dimensiones:
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application/pdf
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Nota general:
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cc_by_nc_nd
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Geofísica
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Materia = Ciencias: Física: Meteorología
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Tipo = Artículo
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Resumen:
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Motivated by findings that energetically consistent subgrid dissipation schemes can improve eddy-permitting ocean simulations, this work investigates the impact of the subgrid dissipation scheme on low-resolution atmospheric dynamical cores. A kinetic energy-conserving dissipation scheme is implemented in the model adding a negative viscosity term that injects back into the eddy field the kinetic energy dissipated by horizontal hyperdiffusion. The kinetic energy-conserving scheme enhances numerical convergence when horizontal resolution is changed with fixed vertical resolution and gives superior low-resolution results. Improvements are most obvious for eddy kinetic energy but also found in other fields, particularly with strong or little scale-selective horizontal hyperdiffusion. One advantage of the kinetic energy-conserving scheme is that it reduces the sensitivity of the model to changes in the subgrid dissipation rate, providing more robust results.
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En línea:
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https://eprints.ucm.es/34895/1/Zurita%2001%20libre%20%2B%20embargo%2001_03_2016.pdf
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