气候变化领域集成服务门户(CCPortal): Global patterns and climatic controls of belowground net carbon fixation

CCPortal

DOI	10.1073/PNAS.2006715117
	Global patterns and climatic controls of belowground net carbon fixation
	Gherardi L.A.; Sala O.E.
发表日期	2020
ISSN	0027-8424
起始页码	20038
结束页码	20043
卷号	117 期号:33
英文摘要	The fraction of fixed carbon allocated belowground in terrestrial ecosystems is the most uncertain component of global carbon cycle assessments. Here we present a novel approach to determining global quantification of belowground productivity, which is estimated at 24.7 Pg y−1 and accounts for 46% of terrestrial carbon fixation. Carbon allocated belowground has a longer residence than its aboveground counterpart, playing a key role in long-term carbon storage. Total belowground productivity increases with precipitation, but the rate of increase decreases from arid to humid ecosystems. The fraction of total fixed carbon entering the soil decreases with precipitation and varies significantly among biomes. These results are indicative of the possible impacts of climate and land use changes on the global carbon cycle. © 2020 National Academy of Sciences. All rights reserved.
语种	英语
scopus关键词	organic carbon; Article; carbon cycle; carbon fixation; climate change; controlled study; ecosystem; geography; global climate; humidity; land biome; nonhuman; precipitation; priority journal
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160862
作者单位	Gherardi, L.A., Global Drylands Center, Arizona State University, Tempe, AZ 85287-4501, United States, School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, United States; Sala, O.E., Global Drylands Center, Arizona State University, Tempe, AZ 85287-4501, United States, School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, United States, School of Sustainability, Arizona State University, Tempe, AZ 85287-4501, United States
推荐引用方式 GB/T 7714	Gherardi L.A.,Sala O.E.. Global patterns and climatic controls of belowground net carbon fixation[J],2020,117(33).
APA	Gherardi L.A.,&Sala O.E..(2020).Global patterns and climatic controls of belowground net carbon fixation.Proceedings of the National Academy of Sciences of the United States of America,117(33).
MLA	Gherardi L.A.,et al."Global patterns and climatic controls of belowground net carbon fixation".Proceedings of the National Academy of Sciences of the United States of America 117.33(2020).