GSTDTAP  > 气候变化
DOI10.1029/2019GL083469
Changes in Fire Activity in Africa from 2002 to 2016 and Their Potential Drivers
Zubkova, Maria1; Boschetti, Luigi1; Abatzoglou, John T.2; Giglio, Louis3
2019-07-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
卷号46期号:13页码:7643-7653
文章类型Article
语种英语
国家USA
英文摘要

While several studies have reported a recent decline in area burned in Africa, the causes of this decline are still not well understood. In this study, we found that from 2002 to 2016 burned area in Africa declined by 18.5%, with the strongest decline (80% of the area) in the Northern Hemisphere. One third of the reduction in burned area occurred in croplands, suggesting that changes in agricultural practices (including cropland expansion) are not the predominant factor behind recent changes in fire extent. Linear models that considered interannual variability in climate factors directly related to biomass productivity and aridity explained about 70% of the decline in burned area in natural land cover. Our results provide evidence that despite the fact that most fires are human-caused in Africa, increased terrestrial moisture during 2002-2016 facilitated declines in fire activity in Africa.


Plain Language Summary The last 15 years of satellite observations indicate a decrease of the global amount of burned area, but this decrease is not evenly distributed geographically. Africa, the continent most affected by fire, has seen the most pronounced decline in burned area. The causes are still poorly understood: the reduction in fire activity could be both due to changes in climate and human factors. We show that only about a third of the reduction in area burned occurred in croplands. The interannual burned area variability in natural lands (forest and nonforest) was linked to climate variables related to moisture availability. We found that about 70% of the reduction of area burned in natural lands can be explained by observed increase in plant-available moisture over the last 15 years. The results point to increased effective precipitation that inhibits flammability, ignition, and fire propagation, especially in wet savannas. These results bring new evidence that, in the complex fire-climate-human relationship, both increased human pressure and changing climate patterns influenced recent fire activity trends in Africa.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000476960100065
WOS关键词BURNED AREA ; INTERANNUAL VARIABILITY ; GAUGE OBSERVATIONS ; SUMMER RAINFALL ; CLIMATE-CHANGE ; RECENT TRENDS ; DROUGHT ; REGIMES ; CROPLAND ; QUALITY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
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/185084
专题气候变化
作者单位1.Univ Idaho, Dept Nat Resources & Soc, Moscow, ID 83843 USA;
2.Univ Idaho, Dept Geog, Moscow, ID 83843 USA;
3.Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA
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GB/T 7714
Zubkova, Maria,Boschetti, Luigi,Abatzoglou, John T.,et al. Changes in Fire Activity in Africa from 2002 to 2016 and Their Potential Drivers[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7643-7653.
APA Zubkova, Maria,Boschetti, Luigi,Abatzoglou, John T.,&Giglio, Louis.(2019).Changes in Fire Activity in Africa from 2002 to 2016 and Their Potential Drivers.GEOPHYSICAL RESEARCH LETTERS,46(13),7643-7653.
MLA Zubkova, Maria,et al."Changes in Fire Activity in Africa from 2002 to 2016 and Their Potential Drivers".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7643-7653.
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