气候变化领域集成服务门户(CCPortal): Warming weakens the night-time barrier to global fire

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DOI	10.1038/s41586-021-04325-1
	Warming weakens the night-time barrier to global fire
	Balch, Jennifer K.; Abatzoglou, John T.; Joseph, Maxwell B.; Koontz, Michael J.; Mahood, Adam L.; McGlinchy, Joseph; Cattau, Megan E.; Williams, A. Park
发表日期	2022
ISSN	0028-0836
EISSN	1476-4687
起始页码	442
结束页码	+
卷号	602 期号:7897
英文摘要	Night-time provides a critical window for slowing or extinguishing fires owing to the lower temperature and the lower vapour pressure deficit (VPD). However, fire danger is most often assessed based on daytime conditions(1,2), capturing what promotes fire spread rather than what impedes fire. Although it is well appreciated that changing daytime weather conditions are exacerbating fire, potential changes in night-time conditions-and their associated role as fire reducers-are less understood. Here we show that night-time fire intensity has increased, which is linked to hotter and drier nights. Our findings are based on global satellite observations of daytime and night-time fire detections and corresponding hourly climate data, from which we determine landcover-specific thresholds of VPD (VPDt), below which fire detections are very rare (less than 95 per cent modelled chance). Globally, daily minimum VPD increased by 25 per cent from 1979 to 2020. Across burnable lands, the annual number of flammable night-time hours-when VPD exceeds VPDt -increased by 110 hours, allowing five additional nights when flammability never ceases. Across nearly one-fifth of burnable lands, flammable nights increased by at least one week across this period. Globally, night fires have become 7.2 per cent more intense from 2003 to 2020, measured via a satellite record. These results reinforce the lack of night-time relief that wildfire suppression teams have experienced in recent years. We expect that continued night-time warming owing to anthropogenic climate change will promote more intense, longer-lasting and larger fires.
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000756892700014
来源期刊	NATURE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280531
作者单位	University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; University of California System; University of California Merced; Idaho; Boise State University; University of California System; University of California Los Angeles; Columbia University
推荐引用方式 GB/T 7714	Balch, Jennifer K.,Abatzoglou, John T.,Joseph, Maxwell B.,et al. Warming weakens the night-time barrier to global fire[J],2022,602(7897).
APA	Balch, Jennifer K..,Abatzoglou, John T..,Joseph, Maxwell B..,Koontz, Michael J..,Mahood, Adam L..,...&Williams, A. Park.(2022).Warming weakens the night-time barrier to global fire.NATURE,602(7897).
MLA	Balch, Jennifer K.,et al."Warming weakens the night-time barrier to global fire".NATURE 602.7897(2022).