Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1617394114 |
Human-started wildfires expand the fire niche across the United States | |
Balch, Jennifer K.1,2; Bradley, Bethany A.3,4; Abatzoglou, John T.5; Nagy, R. Chelsea1; Fusco, Emily J.4; Mahood, Adam L.1,2 | |
2017-03-14 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:11页码:2946-2951 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The economic and ecological costs of wildfire in the United States have risen substantially in recent decades. Although climate change has likely enabled a portion of the increase in wildfire activity, the direct role of people in increasing wildfire activity has been largely overlooked. We evaluate over 1.5 million government records of wildfires that had to be extinguished or managed by state or federal agencies from 1992 to 2012, and examined geographic and seasonal extents of human-ignited wildfires relative to lightning-ignited wildfires. Humans have vastly expanded the spatial and seasonal "fire niche" in the coterminous United States, accounting for 84% of all wildfires and 44% of total area burned. During the 21-y time period, the human-caused fire season was three times longer than the lightning-caused fire season and added an average of 40,000 wildfires per year across the United States. Human-started wildfires disproportionally occurred where fuel moisture was higher than lightning-started fires, thereby helping expand the geographic and seasonal niche of wildfire. Human-started wildfires were dominant (>80% of ignitions) in over 5.1 million km(2), the vast majority of the United States, where as lightning-started fires were dominant in only 0.7 million km(2), primarily in sparsely populated areas of the mountainous western United States. Ignitions caused by human activities are a substantial driver of overall fire risk to ecosystems and economies. Actions to raise awareness and increase management in regions prone to human-started wildfires should be a focus of United States policy to reduce fire risk and associated hazards. |
英文关键词 | anthropogenic wildfires fire starts ignitions modern fire regimes wildfire causes |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396094200053 |
WOS关键词 | WILDLAND-URBAN INTERFACE ; CLIMATE-CHANGE ; DATA SET ; FORESTS ; REGIMES ; CALIFORNIA ; SEVERITY ; INCREASE ; IMPACTS ; EARLIER |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204680 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Colorado, Earth Lab, Boulder, CO 80309 USA; 2.Univ Colorado, Dept Geog, Boulder, CO 80309 USA; 3.Univ Massachusetts, Dept Environm Conservat, Amherst, MA 01003 USA; 4.Univ Massachusetts, Organism & Evolutionary Biol Program, Amherst, MA 01003 USA; 5.Univ Idaho, Dept Geog, Moscow, ID 83844 USA |
推荐引用方式 GB/T 7714 | Balch, Jennifer K.,Bradley, Bethany A.,Abatzoglou, John T.,et al. Human-started wildfires expand the fire niche across the United States[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(11):2946-2951. |
APA | Balch, Jennifer K.,Bradley, Bethany A.,Abatzoglou, John T.,Nagy, R. Chelsea,Fusco, Emily J.,&Mahood, Adam L..(2017).Human-started wildfires expand the fire niche across the United States.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(11),2946-2951. |
MLA | Balch, Jennifer K.,et al."Human-started wildfires expand the fire niche across the United States".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.11(2017):2946-2951. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论