CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Plateau

NWIPB OpenIR

	CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Plateau
	Jiang Chunming ; Yu Guirui ; Cao Guangmin ; Li Yingnian ; Zhang Shichun ; Fang Huajun
	2010-11-01
发表期刊	ADVANCES IN ATMOSPHERIC SCIENCES
摘要	CO2 efflux was estimated using different regression methods in static chamber observation from an alpine meadow on the Qinghai-Tibetan Plateau. The CO2 efflux showed a seasonal pattern, with the maximun flux occurring in the middle of July. The temperature sensitivity of CO2 efflux (Q (10)) was 3.9, which was at the high end of the range of global values. CO2 emissions calculated by linear and nonlinear regression were significantly different (p < 0.05). Compared with the linear regression, CO2 emissions calculated by exponential regression and quadratic regression were 12.7% and 11.2% larger, respectively. However, there were no significant differences in temperature sensitivity values estimated by the three methods. In the entire growing season, the CO2 efflux estimated by linear regression may be underestimated by up to 25% compared to the real CO2 efflux. Consequently, great caution should be taken when using published flux data obtained by linear regression of static chamber observations to estimate the regional CO2 flux in alpine meadows on the Qinghai-Tibetan Plateau.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/53590
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Jiang Chunming,Yu Guirui,Cao Guangmin,et al. CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Plateau[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2010.
APA	Jiang Chunming,Yu Guirui,Cao Guangmin,Li Yingnian,Zhang Shichun,&Fang Huajun.(2010).CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Plateau.ADVANCES IN ATMOSPHERIC SCIENCES.
MLA	Jiang Chunming,et al."CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Plateau".ADVANCES IN ATMOSPHERIC SCIENCES (2010).