Articles | Volume 13, issue 5
Nat. Hazards Earth Syst. Sci., 13, 1393–1399, 2013
Nat. Hazards Earth Syst. Sci., 13, 1393–1399, 2013

Research article 31 May 2013

Research article | 31 May 2013

Trends in adverse weather patterns and large wildland fires in Aragón (NE Spain) from 1978 to 2010

A. Cardil1, D. M. Molina1, J. Ramirez2, and C. Vega-García1 A. Cardil et al.
  • 1School of Agrifood and Forestry Science and Engineering, University of Lleida, Avenida Rovira Roure 191, 25198 Lleida, Spain
  • 2Department of Agricultural Sciences and Technology, University of Leon, Avenida de Portugal 41, 24071 León, Spain

Abstract. This work analyzes the effects of high temperature days on large wildland fires during 1978–2010 in Aragón (NE Spain). A high temperature day was established when air temperature was higher than 20 °C at 850 hPa. Temperature at 850 hPa was chosen because it properly characterizes the low troposphere state, and some of the problems that affect surface reanalysis do not occur. High temperature days were analyzed from April to October in the study period, and the number of these extreme days increased significantly. This temporal trend implied more frequent adverse weather conditions in later years that could facilitate extreme fire behavior. The effects of those high temperatures days in large wildland fire patterns have been increasingly important in the last years of the series.