dor_id: 4120347

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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

351.#.#.6: https://www.revistascca.unam.mx/atm/index.php/atm/index

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harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

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856.4.0.u: https://www.revistascca.unam.mx/atm/index.php/atm/article/view/8434/7904

100.1.#.a: Reuter, G. W.; Xin, L.

524.#.#.a: Reuter, G. W., et al. (1998). Stratiform rainfall rates from the water flux balance equation and cloud model. Atmósfera; Vol. 11 No. 4, 1998. Recuperado de https://repositorio.unam.mx/contenidos/4120347

245.1.0.a: Stratiform rainfall rates from the water flux balance equation and cloud model

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

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

264.#.0.c: 1998

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

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041.#.7.h: eng

520.3.#.a: The area-averaged stratiform precipitation rate can be estimated by equating the downward flux of precipitation with the upward flux of vapour. This study evaluates the usefulness of this approach by comparing the estimated rainfall rate with that computed using a time-dependent non-hydrostatic cloud model. Comparison with the cloud model results reveals how sensitive the water flux balance rainfall rates are to the magnitude and depth of the low-level convergence. It is found that the numerical cloud model overestimated rainfall observations for a case study of central Alberta for which the initial and boundary conditions of the convergence field were adopted from Doppler radar observations. The water flux balance equation and the cloud simulations agreed in that the rainfall rate became stronger when either the magnitude of the surface convergence or the convergence depth was increased. However, the water flux balance equation consistently underestimated the model rainfall rates. Also, rainfall estimates from water flux balance equation were not sensitive to the divergence aloft, whereas the model rainfall was dependent on the distribution of upper-level divergence. The basic conclusion to be drawn is that the water flux balance equation is easy to use, but can provide only a crude estimate of rainfall with a bias to underestimate.

773.1.#.t: Atmósfera; Vol. 11 No. 4 (1998)

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

handle: 60996157845d3202

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

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245.1.0.b: Stratiform rainfall rates from the water flux balance equation and cloud model

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Artículo

Stratiform rainfall rates from the water flux balance equation and cloud model

Reuter, G. W.; Xin, L.

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

Reuter, G. W., et al. (1998). Stratiform rainfall rates from the water flux balance equation and cloud model. Atmósfera; Vol. 11 No. 4, 1998. Recuperado de https://repositorio.unam.mx/contenidos/4120347

Descripción del recurso

Autor(es)
Reuter, G. W.; Xin, L.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Stratiform rainfall rates from the water flux balance equation and cloud model
Fecha
2009-10-05
Resumen
The area-averaged stratiform precipitation rate can be estimated by equating the downward flux of precipitation with the upward flux of vapour. This study evaluates the usefulness of this approach by comparing the estimated rainfall rate with that computed using a time-dependent non-hydrostatic cloud model. Comparison with the cloud model results reveals how sensitive the water flux balance rainfall rates are to the magnitude and depth of the low-level convergence. It is found that the numerical cloud model overestimated rainfall observations for a case study of central Alberta for which the initial and boundary conditions of the convergence field were adopted from Doppler radar observations. The water flux balance equation and the cloud simulations agreed in that the rainfall rate became stronger when either the magnitude of the surface convergence or the convergence depth was increased. However, the water flux balance equation consistently underestimated the model rainfall rates. Also, rainfall estimates from water flux balance equation were not sensitive to the divergence aloft, whereas the model rainfall was dependent on the distribution of upper-level divergence. The basic conclusion to be drawn is that the water flux balance equation is easy to use, but can provide only a crude estimate of rainfall with a bias to underestimate.
Idioma
eng
ISSN
ISSN electrónico: 2395-8812; ISSN impreso: 0187-6236

Enlaces