C-labelling approach
نویسندگان
چکیده
• The results of a single publication stating that terrestrial plants emit methane has sparked a discussion in several scientific journals, but an independent test has not yet been performed. • Here it is shown, with the use of the stable isotope 13 C and a laser-based measuring technique, that there is no evidence for substantial aerobic methane emission by terrestrial plants, maximally 0.3% (0.4 ng g − 1 h − 1 ) of the previously published values. • Data presented here indicate that the contribution of terrestrial plants to global methane emission is very small at best. • Therefore, a revision of carbon sequestration accounting practices based on the earlier reported contribution of methane from terrestrial vegetation is redundant.
منابع مشابه
Monitoring the health-related labelling of foods and non-alcoholic beverages in retail settings.
Food labelling on food packaging has the potential to have both positive and negative effects on diets. Monitoring different aspects of food labelling would help to identify priority policy options to help people make healthier food choices. A taxonomy of the elements of health-related food labelling is proposed. A systematic review of studies that assessed the nature and extent of health-relat...
متن کاملExtending Semantic Edge Labelling
In earlier work [9, 10], we developed an approach to edge labelling and depth reconstruction based on fusion of registered depth and intensity images. This paper presents a new method and extensions to the first stage of that approach, that is the detection and semantic labelling of the edge data. Reflectance edges are extracted from an intensity image, and quadratic curves are fitted to range ...
متن کاملCarbon transfer, partitioning and residence time in the plant-soil system: a comparison of two 13CO labelling techniques
Various 13CO� labelling approaches exist to trace carbon (C) dynamics in plant-soil systems. However, it is not clear if the different approaches yield the same results. Moreover, there is no consistent way of data analysis to date. In this study we compare with the same experimental setup the two main techniques: pulse and continuous labelling. We evaluate how these techniques perform to estim...
متن کاملCarbon transfer, partitioning and residence time in the plant-soil system: a comparison of two 13CO labelling techniques
Various 13CO� labelling approaches exist to trace carbon (C) dynamics in plant-soil systems. However, it is not clear if the different approaches yield the same results. Moreover, there is no consistent way of data analysis to date. In this study we compare with the same experimental setup the two main techniques: pulse and continuous labelling. We evaluate how these techniques perform to estim...
متن کاملA Hamiltonian Approach to the Assignment of Non-reusable Frequencies
The problem of Radio Labelling is to assign distinct integer labels to all the vertices of a graph, such that adjacent vertices get labels at distance at least two. The objective is to minimize the label span. Radio labelling is a combinatorial model for frequency assignment in case that the transmitters are not allowed to operate at the same channel. We show that radio labelling is related to ...
متن کامل