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Observed and expected changes in wildfire-conducive weather and fire events in peri-urban zones and key nature reserves of the Czech Republic
Climate Research ( IF 1.1 ) Pub Date : 2020-11-05 , DOI: 10.3354/cr01617
M Trnka 1, 2 , J Balek 1, 2 , M Možný 1, 3 , E Cienciala 1, 4 , P Čermák 5 , D Semerádová 1 , F Jurečka 1, 2 , P Hlavinka 1, 2 , P Štěpánek 1, 6 , A Farda 1 , P Skalák 1 , J Beranová 1, 4 , F Chuchma 6 , P Zahradníček 1, 6 , D Janouš 1 , Z Žalud 1, 2 , M Dubrovský 1, 7 , P Kindlmann 1, 8 , Z Křenová 1, 8 , M Fischer 1, 2 , J Hruška 1, 9 , R Brázdil 1, 10
Affiliation  

ABSTRACT: Recent drought and a surge in days with weather conditions conducive to wildfire occurrence during 2015-2019 reminded the Czech Republic that it is not immune to this type of natural hazard. Although Central Europe has not been at the center of such events, observed climate data and climate projections suggest a tendency toward more years with wet and mild winters and dry and hot summers. To fill the existing knowledge gap, we used an ensemble of 9 fuel aridity metrics, including 3 dedicated fire weather indices, and evaluated their level of agreement with actual fire occurrence and their temporal trends. The analysis included peri-urban zones of the 36 largest cities and towns in the Czech Republic (home of 3.8 million inhabitants) and the 29 largest protected areas (covering 13.7% of the territory). Fire weather climatology, based on both the Fire Weather Index and the Forest Fire Danger Index, agreed well with the long-term frequency of fires both in peri-urban zones and within protected areas. Future projections based on regional and global model ensembles indicated a significant increase in fuel aridity and an increase in the area affected by fire-conducive conditions both around urban areas and within protected regions. In particular, the area affected by days with very high risk fire weather conditions is likely to increase significantly relative to the past 60 yr. However, the magnitude of the projected change depends to a large degree on the selected fire weather metric and whether RCM- or GCM-based scenarios are used.

中文翻译:

捷克共和国郊区和主要自然保护区的有利于野火的天气和火灾的观测和预期变化

摘要:2015-2019年期间,最近的干旱和天气条件激增,导致野火发生,这提醒捷克共和国,它无法抵抗这种自然灾害。尽管中欧并非此类事件的中心,但观察到的气候数据和气候预测表明,冬季潮湿和温和,夏季干燥而炎热,则有更多年份的趋势。为了填补现有的知识空白,我们使用了9种燃料干旱指标的集合,其中包括3种专门的火灾天气指数,并评估了它们与实际火灾发生的符合程度和时间趋势。分析包括捷克共和国36个最大城镇的城镇周边地区(380万居民的住所)和29个最大的保护区(占领土的13.7%)。火灾天气气候,基于火灾天气指数和森林火灾危险指数的数据,与城市周边地区和保护区内长期发生火灾的频率非常吻合。基于区域和全球模型集成的未来预测表明,城市地区和受保护区域内,燃料干旱显着增加,受火源性条件影响的面积增加。特别是,相对于过去60年,受​​极高火灾风险天气影响的天数可能会显着增加。但是,预计变化的幅度在很大程度上取决于所选的火灾天气指标以及是否使用基于RCM或GCM的方案。与城市周边地区和保护区内的长期火灾频发一致。基于区域和全球模型集成的未来预测表明,城市地区和受保护区域内,燃料干旱显着增加,受火源性条件影响的面积增加。特别是,相对于过去60年,受​​极高火灾风险天气影响的天数可能会显着增加。但是,预计变化的幅度在很大程度上取决于所选的火灾天气指标以及是否使用基于RCM或GCM的方案。与城市周边地区和保护区内的长期火灾频发一致。基于区域和全球模型集成的未来预测表明,城市地区和受保护区域内,燃料干旱显着增加,受火源性条件影响的面积增加。特别是,相对于过去60年,受​​极高火灾风险天气影响的天数可能会显着增加。但是,预计变化的幅度在很大程度上取决于所选的火灾天气指标以及是否使用基于RCM或GCM的方案。基于区域和全球模型集成的未来预测表明,城市地区和受保护区域内,燃料干旱显着增加,受火源性条件影响的面积增加。特别是,相对于过去60年,受​​极高火灾风险天气影响的天数可能会显着增加。但是,预计变化的幅度在很大程度上取决于所选的火灾天气指标以及是否使用基于RCM或GCM的方案。基于区域和全球模型集成的未来预测表明,城市地区和受保护区域内,燃料干旱显着增加,受火源条件影响的面积也有所增加。特别是,相对于过去60年,受​​极高火灾风险天气影响的天数可能会显着增加。但是,预计变化的幅度在很大程度上取决于所选的火灾天气指标以及是否使用基于RCM或GCM的方案。
更新日期:2020-11-06
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