Author, as appears in the article.: Gallego, M C; Trigo, R M; Vaquero, J M; Brunet, M; Garcia, J A; Sigro, J; Valente, M A
Department: Geografia
URV's Author/s: Brunet India, Manuela Catalina / Sigro Rodríguez, Francisco Javier
Keywords: Life below water
Abstract: This study provides the first long-term assessment of changes in precipitation associated with different rainfall categories over the Iberian Peninsula (IP). Using recently digitized data from 27 stations in Portugal and Spain, we have examined trends of precipitation indices for the complete period 1903-2003 and the two subperiods 1903-1953 and 1954-2003. These indices were evaluated seasonally according to five rainfall categories: total rainfall (0.2 mm), light rainfall (0.2 and <2.5 mm), moderate rainfall (2.5 and <7.5 mm), intense rainfall (7.5 mm), and very intense rainfall (15 mm). For the complete period 1903-2003, we have found that the total number of rainy days and that of light rainfall are increasing at many observatories over the IP for all seasons (except in the western zone of Portugal and the Cdiz gulf, where they are decreasing). Both subperiods show opposite behaviors in fall and spring. During the first (second) subperiod spanning 1903-1953 (1954-2003), we can find a generalized decrease (increase) in the number of rainy days in fall in all rainfall categories. In spring, an increase in the number of rainy days is found mainly for total, moderate, and intense categories for the first subperiod, and a slight decrease during the second. In winter, we have verified a decrease in the number of rainy days mainly for total, moderate, and intense rainfall categories in the second subperiod. Finally in relation to the maximum length of dry spells for both subperiods, most observatories show significant trends opposite those of the total number of rainy days. It is worth noticing that the contrasting evolution of trends found between the first and second halves of the twentieth century could only be characterized in this work following a recent comprehensive digitization of historical Iberian precipitation data from the first decades of the twentieth century. Copyright 2011 by the American Geophysical Union.
Thematic Areas: Water science and technology Space and planetary science Soil science Química Polymers and plastics Planejamento urbano e regional / demografia Physical and theoretical chemistry Paleontology Oceanography Meteorology & atmospheric sciences Materials chemistry Materiais Matemática / probabilidade e estatística Interdisciplinar Geosciences, multidisciplinary Geosciences, interdisciplinary Geophysics Geografía Geociências Geochemistry and petrology Geochemistry & geophysics Forestry Engenharias iv Engenharias iii Engenharias ii Engenharias i Ecology Earth-surface processes Earth and planetary sciences (miscellaneous) Condensed matter physics Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência da computação Biodiversidade Atmospheric science Astronomy & astrophysics Astronomia / física Aquatic science
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: javier.sigro@urv.cat javier.sigro@urv.cat manola.brunet@urv.cat
Author identifier: 0000-0003-0969-0338 0000-0003-0969-0338 0000-0002-9386-710X
Record's date: 2024-12-21
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Geophysical Research B: Solid Earth. 116 (2): D02109-
APA: Gallego, M C; Trigo, R M; Vaquero, J M; Brunet, M; Garcia, J A; Sigro, J; Valente, M A (2011). Trends in frequency indices of daily precipitation over the Iberian Peninsula during the last century. Journal Of Geophysical Research B: Solid Earth, 116(2), D02109-. DOI: 10.1029/2010JD014255
Entity: Universitat Rovira i Virgili
Journal publication year: 2011
Publication Type: Journal Publications
Repositori URV