Inter-comparison of three models for δ 13 C of respiration with four regression approaches

Determining the Isotopic Composition of Surface Water Vapor Flux From High‐Frequency Observations Using Flux‐Gradient and Keeling Plot Methods

“…Other details on the regression models can be found in Chen et al. (2017) and Wehr and Saleska (2017).…”

“…The YS method is a general solution for the best fit line where observations are independent of each other, the errors in x and error in y are normally distributed, and these errors can be correlated (Wehr & Saleska, 2017;York, 1966York, , 1969York et al, 2004). Other details on the regression models can be found in Chen et al (2017) and Wehr and Saleska (2017).…”

“…In isotopic steady state, the isotopic composition of plant transpiration approaches that of the xylem water which is a measurable quantity, but δ E of evapotranspiration is also influenced by soil evaporation whose isotopic composition is generally unknown (Yakir & daSternberg, 2000). To overcome a similar problem for CO 2 , some researchers used synthetic data that combines a hypothetical flux isotopic signal with Monte‐Carlo type random variations superimposed on the concentration and the δ variable (Chen et al., 2017; Kayler et al., 2010; Vardag et al., 2016; Wehr & Saleska, 2017; Zobitz et al., 2006). This synthetic approach is less feasible for water vapor because it is difficult to assign a representative value for δ E due to its high temporal variability.…”

Internet of Things to network smart devices for ecosystem monitoring

“…Soil respiration is one of the largest and most important carbon fluxes in terrestrial ecosystems. Continuous in situ measurements of atmospheric CO 2 and the corresponding d 13 C are now possible due to the development of isotope ratio infrared spectroscopy (IRIS) technology [31][32][33], which provides a new opportunity for monitoring the generation and delivery of CO 2 during soil biochemistry processes in both field and laboratory conditions.…”

稳定同位素红外光谱技术测定co2同位素校正方法的研究进展

“…Chinese Journal of Plant Ecology, 42, 143-152. DOI: 10.17521/cjpe.2017.0206 稳定同位素观测仪器和方法的进步使稳定同位 素技术成为解决生态、大气和水文等研究热点与难 点问题的重要工具 (Yakir & Sternberg, 2000;Bowling et al, 2003;Griffis, 2013;林光辉, 2013;Chen et al, …”