气候变化领域集成服务门户(CCPortal): African Humid Period Precipitation Sustained by Robust Vegetation; Soil; and Lake Feedbacks

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DOI	10.1029/2020GL088728
	African Humid Period Precipitation Sustained by Robust Vegetation; Soil; and Lake Feedbacks
	Chandan D.; Peltier W.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	The African Humid Period (∼11,000–5,000 years before present) was the most recent of several precessionally paced wet intervals during which an increase in the Northern Hemisphere summer incoming solar radiation intensifies the West African Monsoon leading to dramatic changes over northern Africa. However, insolation anomaly alone is not sufficient and feedbacks are essential for further amplification of the monsoon. The most significant feedbacks derive from the land surface, arising from changes to vegetation, soil properties, and distribution of surface water. We show that in contrast to previous studies that have explored the individual impacts of these feedbacks, a modern climate model yields a much greater increase in precipitation in response to their collective effect. Agreement with proxies is improved while the desert-steppe transition is pushed further northward than in any previous study. In the West African Sahel, intensities of summer daily mean and extreme precipitation increase by 150% and 90%, respectively. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric thermodynamics; Climate models; Precipitation (meteorology); Solar radiation; Vegetation; Collective effects; Extreme precipitation; Humid periods; Land surface; Northern Hemispheres; Soil property; West African Monsoon; Surface waters; climate modeling; land surface; Northern Hemisphere; precipitation (climatology); soil-vegetation interaction; solar radiation; Sahel [Sub-Saharan Africa]
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169485
作者单位	Department of Physics, University of Toronto, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Chandan D.,Peltier W.R.. African Humid Period Precipitation Sustained by Robust Vegetation; Soil; and Lake Feedbacks[J],2020,47(21).
APA	Chandan D.,&Peltier W.R..(2020).African Humid Period Precipitation Sustained by Robust Vegetation; Soil; and Lake Feedbacks.Geophysical Research Letters,47(21).
MLA	Chandan D.,et al."African Humid Period Precipitation Sustained by Robust Vegetation; Soil; and Lake Feedbacks".Geophysical Research Letters 47.21(2020).