DOI: 10.1002/joc.5957
Scopus记录号: 2-s2.0-85060761348
论文题名: El Niño–Southern Oscillation incidence over long dry sequences and their impact on soil water storage in Argentina
作者: Penalba O.C. ; Pántano V.C. ; Spescha L.B. ; Murphy G.M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
语种: 英语
英文关键词: long dry spells
; remote forcing
; soil–atmosphere interaction
Scopus关键词: Atmospheric pressure
; Climatology
; Losses
; Soil moisture
; Agriculture productions
; Daily precipitations
; Dry spells
; Interannual variability
; Meteorological station
; Precipitation anomalies
; Remote forcing
; Southern oscillation
; Digital storage
英文摘要: The deficit of daily precipitation, persistent over time (long dry sequences [LDS]), causes economic losses in the east–northeast of Argentina where agriculture production is the main economic activity. For this reason, an improvement in the seasonal prediction of the frequency of precipitation is required. Among several forcings influencing the region of study, El Niño–Southern Oscillation (ENSO) has been identified as responsible for a great part of the inter-annual variability of precipitation. Therefore, in this study, we assess the ENSO signal on LDS and the response of soil water storage under the different phases. In order to assess this issue, daily data were used from 30 meteorological stations. Based on this information, dry sequences were quantified considering a dry day when the accumulated precipitation of two consecutive days was lower than 5 mm. From the dry sequences, two different thresholds were used to identify LDS. On one hand, the 85th percentile was selected as a spatially variable threshold and, on the other hand, 15-day length was used as a fixed one. Based on this selection, the severity and the number of LDS were analysed. In general terms, La Niña (El Niño) phase presents higher (lower) severity and higher (lower) probability in the occurrence of more than one LDS per season, except in winter. This result is in concordance with negative (positive) anomalies of accumulated precipitation under La Niña (El Niño) phase. Regarding the impact on the water balance, soil water storage responds to accumulated precipitation anomalies in all the seasons. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116648
Appears in Collections: 全球变化的国际研究计划
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作者单位: Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina; Cátedra de Climatología y Fenología Agrícolas, Facultad de Agronomía, Universidad de Buenos Aires. Av. San Martín 4453, Buenos Aires, Argentina
Recommended Citation:
Penalba O.C.,Pántano V.C.,Spescha L.B.,et al. El Niño–Southern Oscillation incidence over long dry sequences and their impact on soil water storage in Argentina[J]. International Journal of Climatology,2019-01-01