Effects of regional climate change on rural fires in Portugal

Wildfires are a major problem in Portugal. Since 1980 an area equivalent to 3/5 of the forested surface has burned. The aim of the study was to assess the potential impact of regional climate change on wildfires in Portugal using an appropriate Burnt Area Model (BAM). Based on multiple regression analysis, the model was able to estimate the decimal logarithm of the monthly burnt areas in July and August using the Daily Severe Rating as a predictor in the pre-fire season (May and June) and the fire season (July and August). The BAM, which was able to explain 63% of the total observed variance from the 1980−2011 period, was then fed with simulated data by a Global Climate Model (GCM) for the present climate and for two 30 yr periods (2051−2080 and 2071−2100) of future IPCC emission scenario B1. Comparison analysis between the logarithm of burnt area in July and August under present and future climate conditions shows an increase in the mean values of 7 and 11% for the first and second 30 yr periods, respectively, and a decrease of 32% in the SD for the first (2051−2080) period but no distinction between the observed and the simulated values for the last (2071−2100) period. Obtained estimates with the developed approach consistently point towards an increasing risk of fire under future climate conditions, and thus an increasing likelihood of much larger burnt areas.

[1]  Carla Matos Nóbrega.  Climate Change in Portugal. Scenarios, Impacts and Adaptation Measures. SIAM Project - 1ª edição , 2006 .

[2]  Simon C. Scherrer,et al.  Present‐day interannual variability of surface climate in CMIP3 models and its relation to future warming , 2011 .

[3]  M. Turetsky,et al.  Impacts of climate change on fire activity and fire management in the circumboreal forest , 2009 .

[4]  M. Cruz,et al.  A fire behaviour-based fire danger classification for maritime pine stands: Comparison of two approaches , 2006 .

[5]  José M. C. Pereira,et al.  Synoptic patterns associated with large summer forest fires in Portugal , 2005 .

[6]  Vincent R. Gray.  Climate Change 2007: The Physical Science Basis Summary for Policymakers , 2007 .

[7]  M. Flannigan,et al.  Future Area Burned in Canada , 2005 .

[8]  Ioannis Mitsopoulos,et al.  Impact of drought on wildland fires in Greece: implications of climatic change? , 2011 .

[9]  Ross A. Bradstock,et al.  Fire persistence traits of plants along a productivity and disturbance gradient in mediterranean shrublands of south‐east Australia , 2007 .

[10]  João M. N. Silva,et al.  Seasonality of vegetation fires as modified by human action: observing the deviation from eco-climatic fire regimes , 2010 .

[11]  Susana Nieto,et al.  Comparison of Precipitation from Observed Data and General Circulation Models over the Iberian Peninsula , 2006 .

[12]  Andrew Aldersley,et al.  Global and regional analysis of climate and human drivers of wildfire. , 2011, The Science of the total environment.

[13]  Juli G. Pausas.  Changes in Fire and Climate in the Eastern Iberian Peninsula (Mediterranean Basin) , 2004 .

[14]  M. Moritz,et al.  Global Pyrogeography: the Current and Future Distribution of Wildfire , 2009, PloS one.

[15]  J. Innes,et al.  Climatic change and fire potential in South‐Central British Columbia, Canada , 2007 .

[16]  B. M. Wotton,et al.  Climate Change and People-Caused Forest Fire Occurrence in Ontario , 2003 .

[17]  James T. Randerson,et al.  The impacts of climate, land use, and demography on fires during the 21st century simulated by CLM-CN , 2011 .

[18]  Mike D. Flannigan,et al.  Length of the fire season in a changing climate , 1993 .

[19]  Giovanni Bovio,et al.  Comparative study of various methods of fire danger evaluation in southern Europe , 1994 .

[20]  S. T. Buckland,et al.  An Introduction to the Bootstrap. , 1994 .

[21]  José M. C. Pereira,et al.  Atmospheric conditions associated with the exceptional fire season of 2003 in Portugal , 2006 .

[22]  Scott L. Goodrick,et al.  Trends in global wildfire potential in a changing climate , 2010 .

[23]  J. Sáenz,et al.  Validation of IPCC AR4 models over the Iberian Peninsula , 2011 .

[24]  B. Mike Wotton,et al.  Interpreting and using outputs from the Canadian Forest Fire Danger Rating System in research applications , 2009, Environmental and Ecological Statistics.

[25]  A. Weaver,et al.  Detecting the effect of climate change on Canadian forest fires , 2004 .

[26]  Ana Isabel Miranda,et al.  Fire activity in Portugal and its relationship to weather and the Canadian Fire Weather Index System , 2008 .

[27]  Daniel S. Wilks,et al.  Statistical Methods in the Atmospheric Sciences: An Introduction , 1995 .

[28]  Andrew J. Pitman,et al.  Ranking the AR4 climate models over the Murray‐Darling Basin using simulated maximum temperature, minimum temperature and precipitation , 2008 .

[29]  Ana Isabel Miranda,et al.  Forest fires in a changing climate and their impacts on air quality , 2011 .

[30]  Yves Bergeron,et al.  Potential changes in monthly fire risk in the eastern Canadian boreal forest under future climate change , 2009 .

[31]  J. Thepaut,et al.  The ERA‐Interim reanalysis: configuration and performance of the data assimilation system , 2011 .

[32]  Van Wagner.  Equations and FORTRAN program for the Canadian Forest Fire Weather Index System , 1985 .

[33]  David L. Verbyla,et al.  Spatial patterns of lightning strikes in interior Alaska and their relations to elevation and vegetation , 2003 .

[34]  Ana Isabel Miranda,et al.  The impact of spatial resolution on area burned and fire occurrence projections in Portugal under climate change , 2009 .

[35]  Robert E. Keane,et al.  Comparison of the Sensitivity of Landscape-fire-succession Models to Variation in Terrain, Fuel Pattern, Climate and Weather , 2005, Landscape Ecology.

[36]  Paul Poli,et al.  The ERA-Interim archive, version 2.0 , 2011 .

[37]  Mário G. Pereira,et al.  The history and characteristics of the 1980-2005 Portuguese rural fire database , 2011 .

[38]  M. Krawchuk,et al.  Implications of changing climate for global wildland fire , 2009 .

[39]  B. Poulter,et al.  Sensitivity of Portuguese forest fires to climatic, human, and landscape variables: subnational differences between fire drivers in extreme fire years and decadal averages , 2011 .

[40]  Josep Piñol,et al.  Estimating live fine fuels moisture content using meteorologically-based indices , 2001 .

[41]  N. Stephenson,et al.  Actual evapotranspiration and deficit: biologically meaningful correlates of vegetation distribution across spatial scales , 1998 .

[42]  C. Nock,et al.  Forest fire occurrence and climate change in Canada , 2010 .

[43]  G. Meehl,et al.  Going to the Extremes , 2006 .

[44]  Alexei G. Sankovski,et al.  Special report on emissions scenarios : a special report of Working group III of the Intergovernmental Panel on Climate Change , 2000 .

[45]  Carlos C. DaCamara,et al.  Dating Fire Events on End of Season Maps of Burnt Scars , 2008 .

[46]  H. L. Miller,et al.  Climate Change 2007: The Physical Science Basis , 2007 .

[47]  J. G. Borges,et al.  Characterization of wildfires in Portugal , 2011, European Journal of Forest Research.

[48]  T. Swetnam,et al.  Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity , 2006, Science.

[49]  Michael D. Dettinger,et al.  CLIMATE AND WILDFIRE IN THE WESTERN UNITED STATES , 2003 .

[50]  H. Preisler,et al.  Climate change and growth scenarios for California wildfire , 2011 .

[51]  J. Beringer,et al.  Using the Paleorecord to Evaluate Climate and Fire Interactions in Australia , 2007 .

[52]  Valerio Lucarini,et al.  Intercomparison of the northern hemisphere winter mid-latitude atmospheric variability of the IPCC models , 2007 .