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

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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/8439/7909

100.1.#.a: Patra, A. K.; K De, U.; Lohar, D.

524.#.#.a: Patra, A. K., et al. (1999). Existence of low level jet during pre-monsoon period over eastern India and its role in the initiation of nocturnal thunderstorms. Atmósfera; Vol. 12 No. 1, 1999. Recuperado de https://repositorio.unam.mx/contenidos/4120261

245.1.0.a: Existence of low level jet during pre-monsoon period over eastern India and its role in the initiation of nocturnal thunderstorms

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

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

264.#.0.c: 1999

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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001.#.#.#: 022.oai:ojs.pkp.sfu.ca:article/8439

041.#.7.h: eng

520.3.#.a: During the pre-monsoon period, the frequency of occurrence of low level jet (LLJ) and of nocturnal thunderstorms (NCTS) over the Gangetic Plain of West Bengal, a region in the eastern part of India have been studied from both pilot balloon observations and numerical simulations. Observational study indicates that the formation of LLJ and NCTS is significant over inland stations. Composite diagrams for the vertical structure of LLJ show that the core wind speed is observed within the layers between 300 m and 600 m above ground. Sodar observations reveal that vertical shear of horizontal wind has positive lower value below the axis of LLJ whereas it has negative and higher values above the axis. This conclusion differs slightly from those obtained from pilot balloon data because of poor resolution in the later data. Model study also supports the formation of LLJ in the evening because of land/sea contrast. Model-derived vertical velocities are positive over the places of occurrence of nocturnal thunderstorms. The horizontal shear of wind speed beneath the core of LLJ indicates strong relative vorticity and hence convergence at lower levels. This production of convergence by LLJ helps the formation of nocturnal thunderstorms.

773.1.#.t: Atmósfera; Vol. 12 No. 1 (1999)

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: Existence of low level jet during pre-monsoon period ovr eastern India and its role in the initiation of nocturnal thunderstorms

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Artículo

Existence of low level jet during pre-monsoon period over eastern India and its role in the initiation of nocturnal thunderstorms

Patra, A. K.; K De, U.; Lohar, D.

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

Patra, A. K., et al. (1999). Existence of low level jet during pre-monsoon period over eastern India and its role in the initiation of nocturnal thunderstorms. Atmósfera; Vol. 12 No. 1, 1999. Recuperado de https://repositorio.unam.mx/contenidos/4120261

Descripción del recurso

Autor(es)
Patra, A. K.; K De, U.; Lohar, D.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Existence of low level jet during pre-monsoon period over eastern India and its role in the initiation of nocturnal thunderstorms
Fecha
2009-10-05
Resumen
During the pre-monsoon period, the frequency of occurrence of low level jet (LLJ) and of nocturnal thunderstorms (NCTS) over the Gangetic Plain of West Bengal, a region in the eastern part of India have been studied from both pilot balloon observations and numerical simulations. Observational study indicates that the formation of LLJ and NCTS is significant over inland stations. Composite diagrams for the vertical structure of LLJ show that the core wind speed is observed within the layers between 300 m and 600 m above ground. Sodar observations reveal that vertical shear of horizontal wind has positive lower value below the axis of LLJ whereas it has negative and higher values above the axis. This conclusion differs slightly from those obtained from pilot balloon data because of poor resolution in the later data. Model study also supports the formation of LLJ in the evening because of land/sea contrast. Model-derived vertical velocities are positive over the places of occurrence of nocturnal thunderstorms. The horizontal shear of wind speed beneath the core of LLJ indicates strong relative vorticity and hence convergence at lower levels. This production of convergence by LLJ helps the formation of nocturnal thunderstorms.
Idioma
eng
ISSN
ISSN electrónico: 2395-8812; ISSN impreso: 0187-6236

Enlaces