Simulating Spatiotemporal Dynamics of Sichuan Grassland Net Primary Productivity Using the CASA Model and In Situ Observations

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 自然资源与环境安全研究部 > 环境修复与资源工程研究室 > SCI/SSCI期刊论文

	Simulating Spatiotemporal Dynamics of Sichuan Grassland Net Primary Productivity Using the CASA Model and In Situ Observations
	Jiang D.; Fu J. Y.
刊名	Scientific World Journal
	2014
关键词	light-use efficiency vegetation china npp satellite india variability province trends
ISSN号	1537-744X
英文摘要	Net primary productivity (NPP) is an important indicator for grassland resource management and sustainable development. In this paper, the NPP of Sichuan grasslands was estimated by the Carnegie-Ames-Stanford Approach (CASA) model. The results were validated with in situ data. The overall precision reached 70%; alpine meadow had the highest precision at greater than 75%, among the three types of grasslands validated. The spatial and temporal variations of Sichuan grasslands were analyzed. The absorbed photosynthetic active radiation (APAR), light use efficiency (epsilon), and NPP of Sichuan grasslands peaked in August, which was a vigorous growth period during 2011. High values of APAR existed in the southwest regions in altitudes from 2000m to 4000 m. Light use efficiency (epsilon) varied in the different types of grasslands. The Sichuan grassland NPP was mainly distributed in the region of 3000-5000m altitude. The NPP of alpine meadow accounted for 50% of the total NPP of Sichuan grasslands.
收录类别	SCI
公开日期	2014-12-24
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29593]
专题	资源利用与环境修复重点实验室_资源地理与国土资源研究室_SCI/SSCI期刊论文
推荐引用方式 GB/T 7714	Jiang D.,Fu J. Y.. Simulating Spatiotemporal Dynamics of Sichuan Grassland Net Primary Productivity Using the CASA Model and In Situ Observations[J]. Scientific World Journal,2014.
APA	Jiang D.,&Fu J. Y..(2014).Simulating Spatiotemporal Dynamics of Sichuan Grassland Net Primary Productivity Using the CASA Model and In Situ Observations.Scientific World Journal.
MLA	Jiang D.,et al."Simulating Spatiotemporal Dynamics of Sichuan Grassland Net Primary Productivity Using the CASA Model and In Situ Observations".Scientific World Journal (2014).