全球智库信息集成服务系统(G2TT): Effect of climate change, CO2 trends, nitrogen addition, land cover and management intensity change on the carbon balance of European grasslands.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1111/gcb.13050
	Effect of climate change, CO2 trends, nitrogen addition, land cover and management intensity change on the carbon balance of European grasslands.
	Chang J; Ciais P; Viovy N; Vuichard N; Havlik P; Wang H; Sultan B; Soussana J-F
发表日期	2016
出处	Global Change Biology 22 (1): 338-350
出版年	2016
语种	英语
摘要	Several lines of evidence point to European managed grassland ecosystems being a sink of carbon. In this study, we apply ORCHIDEE-GM a process-based carbon cycle model that describes specific management practices of pastures and the dynamics of carbon cycling in response to changes in climatic and biogeochemical drivers. The model is used to simulate changes in the carbon balance (i.e., Net Biome Production, NBP) of European grasslands over 1991-2010 on a 25 km x 25 km grid. The modeled average trend of NBP is 1.8 - 2.0 g C m^-2 yr^-2 during the past two decades. Attribution of this trend suggests management intensity as the dominant driver explaining NBP trends in the model (36% - 43% of the trend due to all drivers). A major change in grassland management intensity has occurred across Europe resulting from reduced livestock numbers. This change has 'inadvertently' enhanced soil C sequestration and reduced N2O and CH4 emissions by 1.2 - 1.5 Gt CO2-equivalent, offsetting more than 7% of greenhoue gas emissions in the whole European agricultural sector during the period 1991-2010. Land-cover change, climate change and rising CO2 also make positive and moderate contributions to the NBP trend (between 24% and 31% of the trend due to all drivers). Change in nitrogen addition (including fertilization and atmospheric deposition) is found to have only marginal net effect on NBP trends. However, this may not reflect reality because our model has only a very simple parameterization of nitrogen-effects on photosynthesis. The sum of NBP trends from each driver is larger than the trend obtained when all drivers are varied together, leaving a residual - nn-attributed - term (22% - 26% of the trend due to all drivers) indicating negative interactions between drivers.
主题	Ecosystems Services and Management (ESM)
关键词	ORCHIDEE-GM European grassland carbon balance management intensity climate change land-cover chanel
URL	http://pure.iiasa.ac.at/id/eprint/11717/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/130737
推荐引用方式 GB/T 7714	Chang J,Ciais P,Viovy N,et al. Effect of climate change, CO2 trends, nitrogen addition, land cover and management intensity change on the carbon balance of European grasslands.. 2016.