DOI: 10.1002/joc.5328
论文题名: Intra-annual rainfall variability in the Spanish hydrographic basins
作者: García-Barrón L. ; Aguilar-Alba M. ; Morales J. ; Sousa A.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 5 起始页码: 2215
结束页码: 2229
语种: 英语
英文关键词: basins
; centralisation parameter
; dispersion parameter
; Iberian peninsula
; intra-annual rainfall
; NAO
; temporal irregularity
; WeMO
Scopus关键词: Atmospheric pressure
; Dispersions
; Hydrographic surveys
; Natural resources management
; Oceanography
; Annual rainfall
; basins
; Centralisation
; Dispersion parameters
; Iberian Peninsula
; temporal irregularity
; WeMO
; Rain
英文摘要: Understanding the intra-annual distribution of rainfall is an important element for climatic classification and serves as a basis for natural resources management. The present study analyses multi-annual irregularities of the rainfall distribution throughout the year in the period 1941–2010, in the hydrographic basins of the Iberian Peninsula. In order to analyse its variation, the rainfall centralisation and dispersion parameters throughout the annual cycle were previously defined and calculated for each year. Inter-annual series of both parameters were generated, which allowed detecting their temporal behaviour in each of the basins and relating differentiated geographic areas. Independent of the total annual rainfall, greater temporal simultaneity is observed in the fluctuations of the intra-annual parameter ‘centralisation’ in the Atlantic basins and wider inter-annual oscillations in the Mediterranean basins. Around the year 1970, there was a displacement in the predominance of autumn rains, although the process is inverted in the last decades. Also from the decade of 1970 there is a general increase in the inter-annual variability of the ‘dispersion’ parameter, especially in the basins that drain towards the Atlantic Ocean. The ‘dispersion’ parameter allows detecting latitudinal (Cantabrian vs. Guadalquivir) and longitudinal (Atlantic vs. Mediterranean) patterns of intra-annual rainfall distribution irregularity in the Iberian Peninsula. The results obtained are also associated to atmospheric general circulation patterns of the North Atlantic Oscillation and the Western Mediterranean Oscillation. The monthly winter values of the North Atlantic Oscillation present a marked influence on dispersion, especially in the basins that discharge into the Atlantic Ocean, which show a double gradient: decreasing longitudinally from the Atlantic coast to the Mediterranean coast and latitudinally from north to south. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116944
Appears in Collections: 气候减缓与适应
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作者单位: Department of Applied Physics II, University of Seville, Seville, Spain; Department of Physical Geography and AGR, University of Seville, Seville, Spain; Department of Plant Biology and Ecology, University of Seville, Seville, Spain
Recommended Citation:
García-Barrón L.,Aguilar-Alba M.,Morales J.,et al. Intra-annual rainfall variability in the Spanish hydrographic basins[J]. International Journal of Climatology,2018-01-01,38(5)