globalchange  > 气候变化与战略
DOI: 10.1073/PNAS.2006715117
论文题名:
Global patterns and climatic controls of belowground net carbon fixation
作者: Gherardi L.A.; Sala O.E.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:33
起始页码: 20038
结束页码: 20043
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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164106
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Gherardi L.A.,Sala O.E.. Global patterns and climatic controls of belowground net carbon fixation[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(33)
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