1,721,278 research outputs found
Weakening and warming of the European Slope Current since the late 1990s attributed to basin-scale density changes
Full text linkOceanic influences on shelf seas are mediated by flow along and across continental slopes, with consequences for regional hydrography and ecosystems. Here we present evidence for the variable North Atlantic influence on European shelf seas over the last four decades, using ocean analysis and reanalysis products, and an eddy-resolving ocean model hindcast. To first order, flows oriented along isobaths at the continental slope are related to the poleward increase of density in the adjacent deep ocean that supports a geostrophic inflow towards the slope. In the North Atlantic, this density gradient and associated inflow has undergone substantial, sometimes abrupt, changes in recent decades. Inflow in the range 10–15 Sv is identified with eastward transport in temperature classes at 30° W, in the latitude range 45–60° N. Associated with major subpolar warming around 1997, a cool and fresh branch of the Atlantic inflow was substantially reduced, while a warm and more saline inflow branch strengthened, with respective changes of the order 5 Sv. Total inflow fell from ~ 15 Sv pre-1997 to ~ 10 Sv post-1997. In the model hindcast, particle tracking is used to trace the origins of poleward flows along the continental slope to the west of Ireland and Scotland, before and after 1997. Backtracking particles up to 4 years, a range of subtropical and subpolar pathways is identified from a statistical perspective. In broad terms, cold, fresh waters of subpolar provenance were replaced by warm, saline waters, of subtropical provenance. These changes have major implications for the downstream shelf regions that are strongly influenced by Atlantic inflow, the northern North Sea in particular, where “subtropicalization” of ecosystems has already been observed since the late 1990s
Code for "Weakening and warming of the European Slope Current since the late 1990s attributed to basin-scale density changes"
No full textThis code was used to analyse and plot data for the paper "Weakening and warming of the European Slope Current since the late 1990s attributed to basin-scale density changes", which was submitted to the journal "Ocean Science" at the end of June 2021.
This paper forms the first chapter of my (Matt's) PhD project: "Changing Atlantic Influences on Northwest European Shelf Seas" at the University of Southampton.
Please see the README files in each folder for full descriptions of each file. Each code file also has a description of it's purpose and outputs in the header. The majority of the analysis uses Conda Python 2.7, and a copy of the environment setup file (.yml) is provided. The Python code was written and executed in the Spyder IDE. The Matlab files were written and run using Matlab 2017a.
All Python and Matlab files were written by Matt Clark unless otherwise stated, with components provided by Bob (Robert) Marsh and James Harle. The Fortran code was written by Bob Marsh.
Datasets used in the analysis:
GODAS: "Global Ocean Data Assimilation System", provided by NOAA. Open Access; freely available at https://www.cpc.ncep.noaa.gov/products/GODAS/
ORCA12: 1/12 degree global ocean model output, part of the NEMO family. Data provided on request to the National Oceanography Centre (https://noc.ac.uk/). Many thanks to the NOC for granting access.
Version 2: removal of EN4 analysis. Addition of other transport calculations (Sverdrup, Ekman, , please see code for details. Changed as a result of peer-review of the paper, now accepted for publication in Ocean Science</span
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Trichome density phenotypic data, image data, candidate genes Nanopore sequencing data
No full textThe Excel file contains phenotypic trichome scores.
The images were where the phenotypic trichome scores in Experiment 2 derived from.
The Nanopore sequencing data provides information on sequenced trichome candidate genes.Two experiments of phenotypic data on trichome density scores and sequencing data in a hybrid grape population (GE1025 family and GE1783 family). The excel file contains this data. Experiment 1 was conducted on greenhouse-maintained GE1025 cuttings in 2018 and 2019 and on field-grown leaves of GE1025 in 2019 (3 environments). Experiment 2 was conducted on GE1783 field-grown leaves in 2019 (1 environment). Experiment 1 was conducted under a dissecting scope. The images were where the trichome scores were obtained in Experiment 2. Nanopore sequencing data was part of Experiment 2.
It is released now because it is under review for publication and it is needed to derive the conclusion for the fine mapped trichome region on chromosome 1 of hybrid grapes (Lu Yin's Ph.D. thesis in 2020 Chapter 4). This study on trichome offers information for hybrid grape breeding programs for a minor role in foliar phylloxera resistance.USDA-NIFA Specialty Crop Research Initiative Award No. 2017- 51181-26829Minnesota Department of Agriculture Specialty Crop GrantUniversity of Minnesota grant-in-aid programYin, Lu; Clark, Matthew. (2020). Trichome density phenotypic data, image data, candidate genes Nanopore sequencing data. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/mqze-pw21
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