1,721,065 research outputs found
Fig. 4. A in Canopy isotopic investigation reveals different water uptake dynamics of maples and oaks
No full textFig. 4. A diagram summarizing the soil water isotope gradient and water source utilization for maples and oaks during the study period. Arrow size indicates the relative contribution of each soil water pool to the isotopic composition of canopy transpiration.Published as part of Lanning, Matthew, Wang, Lixin, Benson, Michael, Zhang, Quan & Novick, Kimberly A., 2020, Canopy isotopic investigation reveals different water uptake dynamics of maples and oaks, pp. 1-8 in Phytochemistry (112389) 175 on page 6, DOI: 10.1016/j.phytochem.2020.112389, http://zenodo.org/record/829524
Fig. 2 in Canopy isotopic investigation reveals different water uptake dynamics of maples and oaks
No full textFig. 2. Fluctuations in vapor pressure deficit (VPD), soil moisture (soil moisture), and transpiration isotope signatures (δT) for maples (δTm) and oaks (δTo) displayed with precipitation amounts for each day of the study period (2017). Error bars shown are 1 standard deviation of the mean.Published as part of Lanning, Matthew, Wang, Lixin, Benson, Michael, Zhang, Quan & Novick, Kimberly A., 2020, Canopy isotopic investigation reveals different water uptake dynamics of maples and oaks, pp. 1-8 in Phytochemistry (112389) 175 on page 3, DOI: 10.1016/j.phytochem.2020.112389, http://zenodo.org/record/829524
The relationship between reference canopy conductance and simplified hydraulic architecture
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
EVALUATING THE PERFORMANCE OF BIOMETRIC APPROACHES FOR VERIFICATION AND MONITORING IN COMMERCIAL FOREST CARBON ACCOUNTING
No full textThesis (M.S.) - Indiana University, Environmental Science/School of Public and Environmental Affairs, 2024Of the strategies to increase land carbon storage and avoid GHG emissions through natural ecosystem management, Forest-based Climate Solutions (FbCS) are believed to offer the greatest mitigation potential. As more funds are allocated towards FbCS deployment, questions arise regarding their actual mitigation potential and the extent to which status-quo approaches can quantify or verify the FbCS efficiency. Carbon accounting methodologies currently attribute climate benefits to projects whose ex-ante change in aboveground biomass stocks is expected to be additional to a business-as-usual static carbon baseline derived from forest inventories and species-specific allometric models. However, stock-centric carbon baselines fail to capture all carbon sources and sinks, and dynamic meteorological conditions drive carbon uptake and forest growth. A combination of high temporal and spatial resolution monitoring of land-atmosphere carbon fluxes (flux towers) and stand-level biometric approaches (increment cores and forest inventories) provides a better understanding of the movement (or flux) and storage of CO2 between ecosystems and the atmosphere from which the net ecosystem productivity (NEP) is estimated. Thus, performing an intercomparison of NEP estimates from flux towers (NEPEC) versus biometric methods (NEPBM) provides a unique opportunity to evaluate the performance of static carbon baselines in response to interannual climate variability on tree growth. Here, we performed static carbon baseline scenarios from a forest inventory approach in three flux sites in the Eastern United States. Carbon stock-centric baselines were confronted with flux tower data from those AmeriFlux sites and tree rings data to assess the representativeness of interannual climate variability on tree growth. Differences in magnitude between NEPEC and NEPBM were sensitive to variations in meteorological conditions, tree species composition, stand age, and biases in allometric equations. Furthermore, NEPEC and NEPBM estimates show a weak correlation over time, with tower-derived estimates averaging 28% to 71% higher than those derived from biometric methods. This study highlights the representativeness of temporal variability in static carbon baselines, and the research needs to evaluate and assess the performance of allometric equations for commercial carbon accounting
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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