气候变化领域集成服务门户(CCPortal): Climate warming from managed grasslands cancels the cooling effect of carbon sinks in sparsely grazed and natural grasslands

CCPortal

DOI	10.1038/s41467-020-20406-7
	Climate warming from managed grasslands cancels the cooling effect of carbon sinks in sparsely grazed and natural grasslands
	Chang J.; Ciais P.; Gasser T.; Smith P.; Herrero M.; Havlík P.; Obersteiner M.; Guenet B.; Goll D.S.; Li W.; Naipal V.; Peng S.; Qiu C.; Tian H.; Viovy N.; Yue C.; Zhu D.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Grasslands absorb and release carbon dioxide (CO2), emit methane (CH4) from grazing livestock, and emit nitrous oxide (N2O) from soils. Little is known about how the fluxes of these three greenhouse gases, from managed and natural grasslands worldwide, have contributed to past climate change, or the roles of managed pastures versus natural grasslands. Here, global trends and regional patterns of the full greenhouse gas balance of grasslands are estimated for the period 1750 to 2012. A new spatially explicit land surface model is applied, to separate the direct effects of human activities from land management and the indirect effects from climate change, increasing CO2 and regional changes in nitrogen deposition. Direct human management activities are simulated to have caused grasslands to switch from a sink to a source of greenhouse gas, because of increased livestock numbers and accelerated conversion of natural lands to pasture. However, climate change drivers contributed a net carbon sink in soil organic matter, mainly from the increased productivity of grasslands due to increased CO2 and nitrogen deposition. The net radiative forcing of all grasslands is currently close to neutral, but has been increasing since the 1960s. Here, we show that the net global climate warming caused by managed grassland cancels the net climate cooling from carbon sinks in sparsely grazed and natural grasslands. In the face of future climate change and increased demand for livestock products, these findings highlight the need to use sustainable management to preserve and enhance soil carbon storage in grasslands and to reduce greenhouse gas emissions from managed grasslands. © 2021, The Author(s).
语种	英语
scopus关键词	soil organic matter; carbon dioxide; carbon sink; climate change; cooling; global climate; grassland; greenhouse gas; land management; land surface; livestock; methane; nitrous oxide; radiative forcing; soil organic matter; Article; carbon cycling; carbon footprint; carbon sink; carbon storage; climate change; climate warming; controlled study; cooling; environmental sustainability; global climate; grassland; greenhouse gas; human activities; land use; livestock; natural grassland; nitrogen deposition; pasture; productivity; radiative forcing; simulation; soil; sparsely grazed grassland; sustainable agriculture
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250793
作者单位	Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, 91191, France; International Institute for Applied Systems Analysis, Laxenburg, A-2361, Austria; College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Institute of Biological & Environmental Sciences, University of Aberdeen, 23 St Machar Drive, Aberdeen, AB24 3UU, United Kingdom; Commonwealth Scientific and Industrial Research Organization, St Lucia, QLD 4067, Australia; Ludwig-Maximilian University, Munich, Germany; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, United States; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China
推荐引用方式 GB/T 7714	Chang J.,Ciais P.,Gasser T.,et al. Climate warming from managed grasslands cancels the cooling effect of carbon sinks in sparsely grazed and natural grasslands[J],2021,12(1).
APA	Chang J..,Ciais P..,Gasser T..,Smith P..,Herrero M..,...&Zhu D..(2021).Climate warming from managed grasslands cancels the cooling effect of carbon sinks in sparsely grazed and natural grasslands.Nature Communications,12(1).
MLA	Chang J.,et al."Climate warming from managed grasslands cancels the cooling effect of carbon sinks in sparsely grazed and natural grasslands".Nature Communications 12.1(2021).