| DOI: | 10.1002/2016GL069855
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| 论文题名: | Suppression of rainfall by fires in African drylands |
| 作者: | Saha M.V.; Scanlon T.M.; D'Odorico P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8730
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| EISSN: | 1944-8461
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| 出版年: | 2016
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| 卷: | 43, 期:16 | | 起始页码: | 8527
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| 结束页码: | 8533
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| 语种: | 英语
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| 英文关键词: | Africa
; dry lands
; fire
; land-atmosphere interactions
; rainfall
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| Scopus关键词: | Drought
; Fuels
; Precipitation (meteorology)
; Rain
; Africa
; Annual rainfall
; Dry land
; Land atmosphere interaction
; Negative auto-correlation
; Satellite observations
; Southern Hemisphere
; Sub-saharan africa
; Fires
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| 英文摘要: | Fire is a widespread agent of disturbance in African drylands, but the impact of fire on local precipitation remains poorly understood and large-scale observational evidence has been lacking. Here we link fire to a reduction in precipitation across African drylands. Using 15 years of satellite observations over continental sub-Saharan Africa, we find that more extensive and later dry season fires lead to wet season rainfall deficits of up to 30 mm (~10%). The effect is stronger in the Southern Hemisphere, a signal we attribute to the later timing of fires in the dry season. Given the coupling between rainfall, fuel loads, and fire in African drylands, a negative interannual feedback may arise between fire and precipitation, whereby fires suppress precipitation, thereby reducing fuel load and fire in the subsequent season. The reduced fuel load would, in turn, increase precipitation, completing the feedback loop. This feedback may contribute to a pervasive negative autocorrelation observed in Southern Hemisphere annual rainfall. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982239133&doi=10.1002%2f2016GL069855&partnerID=40&md5=375763955422fe3c590445e4582d1841
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9693
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States
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| Recommended Citation: | |
Saha M.V.,Scanlon T.M.,D'Odorico P.. Suppression of rainfall by fires in African drylands[J]. Geophysical Research Letters,2016-01-01,43(16).
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