气候变化领域集成服务门户(CCPortal): COVID-19 lockdowns drive decline in active fires in southeastern United States

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DOI	10.1073/pnas.2105666118
	COVID-19 lockdowns drive decline in active fires in southeastern United States
	Poulter B.; Freeborn P.H.; Matt Jolly W.; Morgan Varner J.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:43
英文摘要	Fire is a common ecosystem process in forests and grasslands worldwide. Increasingly, ignitions are controlled by human activities either through suppression of wildfires or intentional ignition of prescribed fires. The southeastern United States leads the nation in prescribed fire, burning ca. 80% of the country’s extent annually. The COVID-19 pandemic radically changed human behavior as workplaces implemented social-distancing guidelines and provided an opportunity to evaluate relationships between humans and fire as fire management plans were postponed or cancelled. Using active fire data from satellite-based observations, we found that in the southeastern United States, COVID-19 led to a 21% reduction in fire activity compared to the 2003 to 2019 average. The reduction was more pronounced for federally managed lands, up to 41% below average compared to the past 20 y (38% below average compared to the past decade). Declines in fire activity were partly affected by an unusually wet February before the COVID-19 shutdown began in mid-March 2020. Despite the wet spring, the predicted number of active fire detections was still lower than expected, confirming a COVID-19 signal on ignitions. In addition, prescribed fire management statistics reported by US federal agencies confirmed the satellite observations and showed that, following the wet February and before the mid-March COVID-19 shutdown, cumulative burned area was approaching record highs across the region. With fire return intervals in the southeastern United States as frequent as 1 to 2 y, COVID-19 fire impacts will contribute to an increasing backlog in necessary fire management activities, affecting biodiversity and future fire danger. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	COVID-19; Fire; Forest
语种	英语
scopus关键词	Article; comparative study; conservation biology; coronavirus disease 2019; danger, risk, safety and related phenomena; fire protection; government; human; lockdown; prediction; spring; United States; wildfire
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238332
作者单位	Earth Sciences Division, Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Rocky Mountain Research Station, Fire Sciences Laboratory, US Forest Service, Missoula, MT 59803, United States; Tall Timbers Research Station, Tallahassee, FL 32312, United States
推荐引用方式 GB/T 7714	Poulter B.,Freeborn P.H.,Matt Jolly W.,et al. COVID-19 lockdowns drive decline in active fires in southeastern United States[J],2021,118(43).
APA	Poulter B.,Freeborn P.H.,Matt Jolly W.,&Morgan Varner J..(2021).COVID-19 lockdowns drive decline in active fires in southeastern United States.Proceedings of the National Academy of Sciences of the United States of America,118(43).
MLA	Poulter B.,et al."COVID-19 lockdowns drive decline in active fires in southeastern United States".Proceedings of the National Academy of Sciences of the United States of America 118.43(2021).