dor_id: 4122582

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

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

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856.4.0.u: https://www.revistascca.unam.mx/atm/index.php/atm/article/view/8270/7740

100.1.#.a: Tang, Chung-muh

524.#.#.a: Tang, Chung-muh (1988). The meridional scale of baroclinic waves with latent heat release. Atmósfera; Vol. 1 No. 2, 1988. Recuperado de https://repositorio.unam.mx/contenidos/4122582

245.1.0.a: The meridional scale of baroclinic waves with latent heat release

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

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

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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: An analytical theory of two-level, moist, quasi-geostrophic baroclinic waves with meridional variation, but without the fl-effect, is developed. The formulation is similar to that of Tang and Fichtl (1983) except that the meridional variation of the waves isallowed. The basic parameters are a rotational Froude number F = (where f is the Coriolis parameter, Sd the static stability in descending portion of the wave, p2 the pressure at the middle level, kd the zonal wave number in the descending portion of the wave, ℓ(=π/D) the meridional wave number and D the meridional extent of the wave) and a heating parameter e which is proportional to the midlevel vertical gradient of the mean flow saturation mixing ratio. For ε ≠ 0 the disturbances are characterized by an unequal zonal length of the ascending or wet portion of the wave (a) and zonal length of the descending or dry portion of the wave (b). The first mode has a small region of strong ascending motion and a large region of weak descending motion (a/b < 1) with the reverse for the second mode (a/b > 1). These features are similar to those obtained by Tang and Fichtl (1983). In the present paper a meridional-scale equation is derived, expressing three possibilities: (i) FORMULA = 0 (no meridional variation of baroclinic waves, discussed in Tang and Fichtl, 1983); (ii) ε = 0 (dry model, discussed in Phillips, 1954, with β-effect ignored, ℓ being arbitrary); and (iii) a biquadratic equation in ℓ/kd. This latter equation essentially contains the information of the influence of latent heat release on the meridional scale of baroclinic waves. The model of meridionally uniform baroclinic waves (ε = 0) and the dry model (e = 0) are singular in that the characteristics of these two models cannot be deduced by setting ℓ/kd → 0 or ε → 0 in this biquadratic equation. For ε < 0.464, the ratio of the meridional extent D of the zonal domain, a + b, is less than 0.7. For a given e and a given F, this ratio is larger for the first mode than for the second mode. The growth rate in the ascending region is equal to that in the descending region. The growth rate depends on both F and ℓ/kd. For a given F, the larger the heating parameter e, the larger the growth rate.  .

773.1.#.t: Atmósfera; Vol. 1 No. 2 (1988)

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

310.#.#.a: Trimestral

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: The meridional scale of baroclinic waves with latent heat relase

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Artículo

The meridional scale of baroclinic waves with latent heat release

Tang, Chung-muh

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

Tang, Chung-muh (1988). The meridional scale of baroclinic waves with latent heat release. Atmósfera; Vol. 1 No. 2, 1988. Recuperado de https://repositorio.unam.mx/contenidos/4122582

Descripción del recurso

Autor(es)
Tang, Chung-muh
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
The meridional scale of baroclinic waves with latent heat release
Fecha
2009-10-05
Resumen
An analytical theory of two-level, moist, quasi-geostrophic baroclinic waves with meridional variation, but without the fl-effect, is developed. The formulation is similar to that of Tang and Fichtl (1983) except that the meridional variation of the waves isallowed. The basic parameters are a rotational Froude number F = (where f is the Coriolis parameter, Sd the static stability in descending portion of the wave, p2 the pressure at the middle level, kd the zonal wave number in the descending portion of the wave, ℓ(=π/D) the meridional wave number and D the meridional extent of the wave) and a heating parameter e which is proportional to the midlevel vertical gradient of the mean flow saturation mixing ratio. For ε ≠ 0 the disturbances are characterized by an unequal zonal length of the ascending or wet portion of the wave (a) and zonal length of the descending or dry portion of the wave (b). The first mode has a small region of strong ascending motion and a large region of weak descending motion (a/b < 1) with the reverse for the second mode (a/b > 1). These features are similar to those obtained by Tang and Fichtl (1983). In the present paper a meridional-scale equation is derived, expressing three possibilities: (i) FORMULA = 0 (no meridional variation of baroclinic waves, discussed in Tang and Fichtl, 1983); (ii) ε = 0 (dry model, discussed in Phillips, 1954, with β-effect ignored, ℓ being arbitrary); and (iii) a biquadratic equation in ℓ/kd. This latter equation essentially contains the information of the influence of latent heat release on the meridional scale of baroclinic waves. The model of meridionally uniform baroclinic waves (ε = 0) and the dry model (e = 0) are singular in that the characteristics of these two models cannot be deduced by setting ℓ/kd → 0 or ε → 0 in this biquadratic equation. For ε < 0.464, the ratio of the meridional extent D of the zonal domain, a + b, is less than 0.7. For a given e and a given F, this ratio is larger for the first mode than for the second mode. The growth rate in the ascending region is equal to that in the descending region. The growth rate depends on both F and ℓ/kd. For a given F, the larger the heating parameter e, the larger the growth rate.  .
Idioma
eng
ISSN
ISSN electrónico: 2395-8812; ISSN impreso: 0187-6236

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