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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

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336.#.#.a: Artículo

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100.1.#.a: Wiin Nielsen, A.

524.#.#.a: Wiin Nielsen, A. (1997). On intermonthly oscillations in the atmosphere, part II. Atmósfera; Vol. 10 No. 1, 1997. Recuperado de https://repositorio.unam.mx/contenidos/11000

245.1.0.a: On intermonthly oscillations in the atmosphere, part II

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Ciencias de la Atmósfera y Cambio Climático, UNAM

264.#.0.c: 1997

264.#.1.c: 2009-10-05

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC 4.0 Internacional, https://creativecommons.org/licenses/by-nc/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico editora@atmosfera.unam.mx

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041.#.7.h: eng

520.3.#.a: The investigation explores the possibility that the observed intermonthly variations in the atmosphere may be described by a nonlinear low-order model containing nine components. The model is formulated on a f-plane and contains only wave-wave interactions. It is based on the equivalent barotropic atmosphere formulated in such a way that it contains both heating and dissipations. The wave numbers vary from 1 to 3 in the zonal and the meridional direction. Most of the integrations of the model assume that the oscillations are a planetary phenomenon, and they have therefore been performed with a maximum wavelength of 28000 km. The results show that the observed periods (30-35, 45 and 70 days) may be reproduced by the model. Other periods are also found, but they are mainly of small amplitudes. The model permits a determination of the heating pattern necessary to produce the observed oscillations. It is required that the heating level is above the time-averaged heating in the atmosphere, and the heating is such that it displays a strong meridional heating gradient. The investigation is a continuation of an earlier attempt to model intermonthly oscillations using a very simple three-component model based on the first equation of motion with non-linear advection and momentum forcing and dissipation. The new model permits a more physical description of the phenomena.

773.1.#.t: Atmósfera; Vol. 10 No. 1 (1997)

773.1.#.o: https://www.revistascca.unam.mx/atm/index.php/atm/index

046.#.#.j: 2021-10-20 00:00:00.000000

022.#.#.a: ISSN electrónico: 2395-8812; ISSN impreso: 0187-6236

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264.#.1.b: Instituto de Ciencias de la Atmósfera y Cambio Climático, UNAM

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harvesting_date: 2023-06-20 16:00:00.0

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245.1.0.b: Aircraft measurements of CO2, O3, water vapor, aerosol fluxes and, turbulence over Lake Michigan

last_modified: 2023-06-20 16:00:00

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Artículo

On intermonthly oscillations in the atmosphere, part II

Wiin Nielsen, A.

Instituto de Ciencias de la Atmósfera y Cambio Climático, UNAM, publicado en Atmósfera, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Ciencias de la Atmósfera y Cambio Climático, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Wiin Nielsen, A. (1997). On intermonthly oscillations in the atmosphere, part II. Atmósfera; Vol. 10 No. 1, 1997. Recuperado de https://repositorio.unam.mx/contenidos/11000

Descripción del recurso

Autor(es)
Wiin Nielsen, A.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
On intermonthly oscillations in the atmosphere, part II
Fecha
2009-10-05
Resumen
The investigation explores the possibility that the observed intermonthly variations in the atmosphere may be described by a nonlinear low-order model containing nine components. The model is formulated on a f-plane and contains only wave-wave interactions. It is based on the equivalent barotropic atmosphere formulated in such a way that it contains both heating and dissipations. The wave numbers vary from 1 to 3 in the zonal and the meridional direction. Most of the integrations of the model assume that the oscillations are a planetary phenomenon, and they have therefore been performed with a maximum wavelength of 28000 km. The results show that the observed periods (30-35, 45 and 70 days) may be reproduced by the model. Other periods are also found, but they are mainly of small amplitudes. The model permits a determination of the heating pattern necessary to produce the observed oscillations. It is required that the heating level is above the time-averaged heating in the atmosphere, and the heating is such that it displays a strong meridional heating gradient. The investigation is a continuation of an earlier attempt to model intermonthly oscillations using a very simple three-component model based on the first equation of motion with non-linear advection and momentum forcing and dissipation. The new model permits a more physical description of the phenomena.
Idioma
eng
ISSN
ISSN electrónico: 2395-8812; ISSN impreso: 0187-6236

Enlaces