Multidecadal variation of winter rainfall in northwestern Baja California

Some climatic features regarding the precipitation over northwestern Baja California (Mexico) were examined relative to the interannual, decadal and multidecadal variability of some Pacific indexes. The analysis is based on annual values from 1900 to 2001 of the winter (November through April) rainf...

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Autores principales:	Reyes-Coca, S, Troncoso-Gaytán, R
Formato:	info:eu-repo/semantics/article
Lenguaje:	eng
Publicado:	Iniversidad Autónoma de Baja California 2004
Materias:	winter rainfall Southern Oscillation Index Pacific Decadal Oscillation drought wavelet analysis lluvia invernal Índice de Oscilación del Sur Oscilación Decenal del Pacífico sequía análisis ondicular
Acceso en línea:	https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/117
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spelling	repositorioinstitucional-20.500.12930-73492023-05-09T14:30:48Z Multidecadal variation of winter rainfall in northwestern Baja California Modulación multidecenal de la lluvia invernal en el noroeste de Baja California Reyes-Coca, S Troncoso-Gaytán, R winter rainfall Southern Oscillation Index Pacific Decadal Oscillation drought wavelet analysis lluvia invernal Índice de Oscilación del Sur Oscilación Decenal del Pacífico sequía análisis ondicular Some climatic features regarding the precipitation over northwestern Baja California (Mexico) were examined relative to the interannual, decadal and multidecadal variability of some Pacific indexes. The analysis is based on annual values from 1900 to 2001 of the winter (November through April) rainfall data for Ensenada, Baja California, which is climatologically representative of northwestern Baja California. The Southern Oscillation Index (SOI) and Pacific Decadal Oscillation (PDO) were also examined. The results are derived from statistical and wavelet analysis of the rainfall data. The time-frequency evolution of the data shows close association with the interannual (2–7 years), decadal (10–20 years) and multidecadal (20–70 years) signals of the SOI and PDO. It is interesting to note that the multidecadal period of drought in northwestern Baja California (1941/1942 to 1976/1977) coincides with negative PDO values (characterized by cold sea surface waters off North America) and frequent La Niña events, whereas decadal rainy conditions (1977/1978 to 1998/1999) coincide with positive PDO values (characterized by warm sea surface waters off North America) and frequent and intense El Niño events. Finally, a future scenario, derived from the wavelet analysis, shows the possibility of a dry decadal period for northwestern Baja California from 1999 to 2015, approximately. Se examinaron algunas características climáticas relativas a la precipitación sobre el noroeste de Baja California (México) en relación con la variabilidad interanual, decenal y multidecenal de algunos índices del Océano Pacífico. El análisis se basa en valores anuales de 1900 a 2001 de datos de precipitación invernal (de noviembre a abril) en Ensenada, Baja California, región climatológicamente representativa del noroeste de Baja California. También se examinan el ÿndice de la Oscilación del Sur (IOS) y la Oscilación Decenal del Pacífico (ODP). Los resultados se obtuvieron de análisis estadísticos y ondiculares de los datos de precipitación invernal. La evolución tiempo-frecuencia de los datos muestra una asociación cercana con las señales interanual (2–7 años), decenal (10–20 años) y multianual (20–70 años) presentes en el IOS y la ODP. Es interesante notar que el periodo multidecenal de sequías en el noroeste de Baja California (1941/1942 a 1976/77) coincide con valores negativos de la ODP (caracterizada por aguas marinas superficiales frías frente a Norteamérica) y frecuentes eventos de La Niña, mientras que condiciones lluviosas (1977/1978 a 1998/1999) coinciden con valores positivos de la ODP (caracterizada por aguas marinas superficiales cálidas frente a Norteamérica) y frecuentes e intensos eventos El Niño. Finalmente, un escenario futuro, derivado del análisis ondicular, muestra la posibilidad de un periodo decenal seco para el noroeste de Baja California de 1999 a 2015, aproximadamente. 2004-03-06 2021-06-03T03:55:00Z 2021-06-03T03:55:00Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/117 10.7773/cm.v30i11.117 https://hdl.handle.net/20.500.12930/7349 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/117/96 application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 30 No. 1A (2004); 99-108 Ciencias Marinas; Vol. 30 Núm. 1A (2004); 99-108 2395-9053 0185-3880
institution	Repositorio Institucional
collection	DSpace
language	eng
topic	winter rainfall Southern Oscillation Index Pacific Decadal Oscillation drought wavelet analysis lluvia invernal Índice de Oscilación del Sur Oscilación Decenal del Pacífico sequía análisis ondicular
spellingShingle	winter rainfall Southern Oscillation Index Pacific Decadal Oscillation drought wavelet analysis lluvia invernal Índice de Oscilación del Sur Oscilación Decenal del Pacífico sequía análisis ondicular Reyes-Coca, S Troncoso-Gaytán, R Multidecadal variation of winter rainfall in northwestern Baja California
description	Some climatic features regarding the precipitation over northwestern Baja California (Mexico) were examined relative to the interannual, decadal and multidecadal variability of some Pacific indexes. The analysis is based on annual values from 1900 to 2001 of the winter (November through April) rainfall data for Ensenada, Baja California, which is climatologically representative of northwestern Baja California. The Southern Oscillation Index (SOI) and Pacific Decadal Oscillation (PDO) were also examined. The results are derived from statistical and wavelet analysis of the rainfall data. The time-frequency evolution of the data shows close association with the interannual (2–7 years), decadal (10–20 years) and multidecadal (20–70 years) signals of the SOI and PDO. It is interesting to note that the multidecadal period of drought in northwestern Baja California (1941/1942 to 1976/1977) coincides with negative PDO values (characterized by cold sea surface waters off North America) and frequent La Niña events, whereas decadal rainy conditions (1977/1978 to 1998/1999) coincide with positive PDO values (characterized by warm sea surface waters off North America) and frequent and intense El Niño events. Finally, a future scenario, derived from the wavelet analysis, shows the possibility of a dry decadal period for northwestern Baja California from 1999 to 2015, approximately.
format	info:eu-repo/semantics/article
author	Reyes-Coca, S Troncoso-Gaytán, R
author_facet	Reyes-Coca, S Troncoso-Gaytán, R
author_sort	Reyes-Coca, S
title	Multidecadal variation of winter rainfall in northwestern Baja California
title_short	Multidecadal variation of winter rainfall in northwestern Baja California
title_full	Multidecadal variation of winter rainfall in northwestern Baja California
title_fullStr	Multidecadal variation of winter rainfall in northwestern Baja California
title_full_unstemmed	Multidecadal variation of winter rainfall in northwestern Baja California
title_sort	multidecadal variation of winter rainfall in northwestern baja california
publisher	Iniversidad Autónoma de Baja California
publishDate	2004
url	https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/117
_version_	1792609597802938368

Multidecadal variation of winter rainfall in northwestern Baja California

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