QQ客服 官方微博 反馈留言

	Seasonal variation and meteorological control of CO(2) flux in a hilly plantation in the mountain areas of North China
	Huang H. ; Zhang J. S. ; Meng P. ; Fu Y. L. ; Zheng N. ; Gao J.
	2011
关键词	hilly area of North China plantation eddy covariance CO(2) flux meteorological factors carbon-dioxide exchange water-vapor exchange ecosystem respiration stomatal conductance soil respiration european forests energy fluxes beech forest long-term temperature
英文摘要	The carbon cycle of terrestrial ecosystems is an important scientific issue in global climate change research. Plantation forest plays an important role in terrestrial carbon budget in China. In this study, eddy covariance flux data measured at Xiaolangdi forest ecosystem research station (XLD) in 2007 and 2008 are used to analyze the seasonal variation and meteorological control of CO(2) flux in a 30-yr-old mixed plantation. The plantation forest mainly consists of Quercus variabilis, Platycladus orientalis, and Robinia pseudoacacia. The results show that the seasonal variations of net ecosystem exchange of CO(2) (NEE), gross primary production (GPP), and ecosystem respiration (R (e)) display single-peak curves. The maximum of carbon sequestration appears during May and June each year. The relative contribution of carbon release from ecosystem respiration to GPP varied slightly between 2007 and 2008. The relationship between NEE and photosynthetic active radiation (Q (p)) accords with the rectangular hyperbola model on diurnal scale, and shows a good linear correlation on monthly scale. The ecosystem photosynthetic parameters: the maximum photosynthetic rate (P (max)), the ecosystem photosynthetic photonyield (alpha), and the daytime ecosystem respiration (R (d)) exhibit seasonal variations. P (max) reaches the maximum in August each year, with small interannual difference. The interannual differences of alpha and R (d) are obvious, which is attributed to the changes of meteorological factors, such as solar radiation, vapor pressure deficit (D), precipitation, etc. Parameters R (e), GPP, and NEP (net ecosystem production) have obvious exponential relations with temperature on monthly scale. There is a hysteresis in the response of GPP and NEP to temperature, i.e., the carbon sequestration is not the maximum when the temperature reaches the peak value. The Q (10) values were 1.37 and 1.45 in 2007 and 2008, respectively. On monthly scale, R (e), GPP, and NEE increase as D increases, but rise slowly and even decrease when D is higher than 1.5 kPa.
出处	Acta Meteorologica Sinica
卷	25
期	2
页	238-248
收录类别	SCI
语种	英语
ISSN号	0894-0525
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23834]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Huang H.,Zhang J. S.,Meng P.,et al. Seasonal variation and meteorological control of CO(2) flux in a hilly plantation in the mountain areas of North China. 2011.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。