气候变化领域集成服务门户(CCPortal): Widespread increase of boreal summer dry season length over the Congo rainforest

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DOI	10.1038/s41558-019-0512-y
	Widespread increase of boreal summer dry season length over the Congo rainforest
	Jiang Y.; Zhou L.; Tucker C.J.; Raghavendra A.; Hua W.; Liu Y.Y.; Joiner J.
发表日期	2019
ISSN	1758678X
卷号	9 期号:8
英文摘要	Dry season length strongly influences tropical rainforest vegetation and is largely determined by precipitation patterns1,2. Over the Amazon, the dry season length has increased since 1979 and severe short-term droughts have occurred3,4. However, similar changes have not been investigated for the world’s second largest rainforest, the Congo Basin, where long-term drying and large-scale declines in forest greenness and canopy water content were reported5. Here we present observational evidence for widespread increases in the boreal summer (June–August) dry season length over the Congo Basin since the 1980s, from both hydrological and ecological perspectives. We analysed both dry season onset and dry season end via multiple independent precipitation and satellite-derived vegetation datasets for the period 1979–2015. The dry season length increased by 6.4–10.4 days per decade in the period 1988–2013, primarily attributed to an earlier dry season onset and a delayed dry season end. The earlier dry season onset was caused by long-term droughts due to decreased rainfall in the pre-dry season (April–June). The delayed dry season end resulted from insufficiently replenished soil moisture, which postpones the start of the next wet season and hinders vegetation regrowth. If such changes continue, the enhanced water stress in a warming climate may affect the carbon cycle and alter the composition and structure of evergreen rainforest1,6. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124375
作者单位	Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, China; School of Geographic Sciences, Nanjing University of Information Science & Technology, Nanjing, China
推荐引用方式 GB/T 7714	Jiang Y.,Zhou L.,Tucker C.J.,et al. Widespread increase of boreal summer dry season length over the Congo rainforest[J],2019,9(8).
APA	Jiang Y..,Zhou L..,Tucker C.J..,Raghavendra A..,Hua W..,...&Joiner J..(2019).Widespread increase of boreal summer dry season length over the Congo rainforest.Nature Climate Change,9(8).
MLA	Jiang Y.,et al."Widespread increase of boreal summer dry season length over the Congo rainforest".Nature Climate Change 9.8(2019).