Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15190 |
Nonlinear dynamics of fires in Africa over recent decades controlled by precipitation | |
Fangli Wei; Shuai Wang; Bojie Fu; Martin Brandt; Naiqing Pan; Cong Wang; Rasmus Fensholt | |
2020-06-23 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Dynamics of fires in Africa are of critical importance for understanding changes in ecosystem properties and effects on the global carbon cycle. Given increasing fire risk from projected warming on the one hand and a documented human‐driven decline in fires on the other, it is still unknown how the complex interplay between climate and human factors affects recent changes of fires in Africa. Moreover, the impact of recent strong El Niño events on fire dynamics is not yet known. By applying an ensemble empirical mode decomposition method to satellite‐derived fire burned area, we investigated the spatio‐temporal evolution of fires in Africa over 2001–2016 and identified the potential dominant drivers. Our results show an overall decline of fire rates, which is continuous over the time period and mainly caused by cropland expansion in northern sub‐Saharan Africa. However, we also find that years of high precipitation have caused an initial increase in fire rates in southern Africa, which reversed to a decline in later years. This decline is caused by a high frequency of dry years leading to very low fuel loads, suggesting that recent drought causes a general reduction of burned areas, in particular in xeric savannas. In some mesic regions (10°–15°S), solar radiation and increased temperature caused increase in fires. These findings show that climate change overrules the impact of human expansion on fire rates at the continental scale in Africa, reducing the fire risk. |
领域 | 气候变化 ; 资源环境 |
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/278126 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Fangli Wei,Shuai Wang,Bojie Fu,et al. Nonlinear dynamics of fires in Africa over recent decades controlled by precipitation[J]. Global Change Biology,2020. |
APA | Fangli Wei.,Shuai Wang.,Bojie Fu.,Martin Brandt.,Naiqing Pan.,...&Rasmus Fensholt.(2020).Nonlinear dynamics of fires in Africa over recent decades controlled by precipitation.Global Change Biology. |
MLA | Fangli Wei,et al."Nonlinear dynamics of fires in Africa over recent decades controlled by precipitation".Global Change Biology (2020). |
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