1,720,967 research outputs found
Model output relating to HCHO columns over India
No full textModel input and output for the publication "Which processes drive observed variations of HCHO columns over India?", which, at the time of writing, is in Atmospheric Chemistry and Physics Discussions with DOI 10.5194/acp-2017-1017. HCHO: formaldehyde.
## Box model (CABBA/MECCA)##
Contained in BOX.zip:
The contents of this are the output from each run of the model, which includes a .zip of the model code. The file caaba.log in each contains all of the namelist options.
For the isoprene-related runs listed in table 1, there exists two folders for each, one base run with no isoprene injection and a second (suffixed with ""_9i"") for the run with the injection. These are written out in full, i.e. SOUTH_01 and SOUTH_01_9i relate to S_01.
For the D_05 runs, "D_hold_base" contains the unperturbed run, "D_hold_C3H6" contains the run with an injection of propene, "D_hold_C3H8" contains the run with the injection of propane, and "D_hold_C4H10" contains the run with an injection of n-butane.
## GEOS-Chem ##
Contained in GEOS_CHEM.zip:
* GEOS_CHEM/ts_omi.YYYYMMDD.bpch' - ND51 output from the GEOS-Chem model
* GEOS_CHEM/trac_avg_2014isop.bpch' - Contains monthly averages of the isoprene emissions calculated by MEGAN
* GEOS_CHEM/input.geos' - is the main input file used for the GEOS-Chem run (reconstructed as original file had been edited)
* GEOS_CHEM/HEMCO_Config.rc' - is the input file for the HEMCO component (reconstructed as original file had been edited)The .geos and .rc files are simply text files that can be read by gedit or similar. They are model input files. The .bpch files are output from the GEOS-Chem simulation (GEOS-Chem v10-01). This is the “binary punch” format, which is pretty antiquated by now but can still be read by a variety of programmes. http://acmg.seas.harvard.edu/gamap/doc/Chapter_6.html#6.2 might be the best documentation of it. The community of GEOS-Chem users (which is a few hundred people) is necessarily very familiar with data in this format. The most widely-used viewing program for GEOS-Chem output is GAMAP (an IDL utility) http://acmg.seas.harvard.edu/gamap/ . GAMAP download and installation instructions are at: http://acmg.seas.harvard.edu/gamap/doc/Chapter_2.html
WRF-Chem Volcano output - Etna Christmas 2018 (run L2)
No full text<p>Output from a model run of a modified version of WRF-Chem, which we refer to as WRF-Chem Volcano (WCV). At the time of submission of this dataset, these data were the basis of the modelling part of a paper in preparation, working title: "WRF-Chem modelling and TROPOMI observations of halogen chemistry within the plume of Etna's Christmas 2018 eruption".</p>
<p>The code of WCV is maintained <a href="https://github.com/LukeSurl/WCV">here</a>. Development of this code will continue after the submission of this repository, <a href="https://github.com/LukeSurl/WCV/tree/20200521">This branch</a> is a permanent record of the code as used to create this dataset.<br>
This is a simulation of the chemistry of the plume of the 2018 eruption of Mount Etna. This simulation includes bromine, chlorine and mercury chemistry. The time period covered is the 24-27 December, however please note that the author considers the first 24 hours of simulation to be "spin up", and that the modelled volcanic fluxes were assigned based on observations at midday on the 25th, and were not calibrated specifically for the 26th or 27th.</p>
<p>"Run L2" refers the internal serial number assigned to this model run.</p>
<p><strong>Overview of files</strong></p>
<p><strong><em>Output files: wrfout_d0*_YYYY-MM-DD_HH:MM:SS</em></strong></p>
<p>Output data is contained in NetCDF files. Each file contains hourly snapshots of the 3D simulation with fields for various parameters. Most of the 4D (three spatial dimensions and time) variables record modelled mixing ratios of various species (in units ppm). Many other variables are standard WRF-Chem output variables; please see <a href="https://ruc.noaa.gov/wrf/wrf-chem/">WRF-Chem's documentation</a>. If the meaning of a variable is unclear, please <a href="mailto:[email protected]?subject=WCV%20run%20L2%20dataset">contact the author</a>.</p>
<p>Files are separated by model domain and by time. The "d0x" value specifies the model domain. Domain 1 is the full extent of the modelled area and has grid cells of 30 km × 30 km. Domains 2, 3, 4 each model a successively smaller area subset at a 3x greater resolution than their parent domain. Please see the ACPD paper for further details on this.<br>
For operational reasons, the number of hours in different output files is slightly irregular:</p>
<ul>
<li>Files <em>wrfout_d0x_2018-12-24_00:00:00</em> contain 24 hourly snapshots from 2018-12-24_00:00:00 -- 2018-12-24_23:00:00</li>
<li>Files <em>wrfout_d0x_2018-12-25_00:00:00</em> contain 24 hourly snapshots from 2018-12-25_00:00:00 -- 2018-12-25_23:00:00</li>
<li>Files <em>wrfout_d0x_2018-12-26_00:00:00</em> contain 1 snapshot, 2018-12-26_00:00:00 only</li>
<li>Files <em>wrfout_d0x_2018-12-26_01:00:00</em> contain 24 hourly snapshots from 2018-12-26_01:00:00 -- 2018-12-27_00:00:00</li>
<li>Files <em>wrfout_d0x_2018-12-27_01:00:00</em> contain 24 hourly snapshots from 2018-12-27_01:00:00 -- 2018-12-28_00:00:00</li>
</ul>
<p><strong><em>Input files</em></strong></p>
<p>This repository also contains various input files for the WRF-Chem simulation.</p>
<ul>
<li><em>wrfinput_d0x</em> (netcdf format) defines the initial conditions assigned for the beginning of the simulation (2018-12-24 00:00:00) for each of the model domains.</li>
<li><em>wrfbdy_d01</em> (netcdf format) defines the boundary conditions for the simulation.</li>
<li><em>wrfchemi_d0x_YYYY-MM-DD_HH:MM:SS</em> (netcdf format) defines, for each day and domain of the simulation, anthropogenic emissions.</li>
<li><em>wrfchemv_d0x</em> (netcdf format) defines the volcanic emissions. A file is specified for each domain.</li>
<li><em>namelist.input</em> (text file) defines various wrf-chem runtime options </li>
</ul>
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
Modelling the atmospheric chemistry of volcanic plumes
No full textAbstract
Volcanoes are the principal way by which volatiles are transferred from the
solid Earth to the atmosphere-hydrosphere system. Once released into the
atmosphere, volcanic emissions rapidly undergo a complex series of chemical
reactions. This thesis seeks to further the understanding of such processes by
both observation and numerical modelling.
I have adapted WRF-Chem to model passive degassing from Mount Etna,
the chemistry of its plume, and its influence on the wider atmosphere. This
investigation considers model plumes from the point of emission up to a day’s
travel from the vent and is able to reproduce observed phenomena of BrO
formation and O3 depletion within volcanic plumes.
The model plume influences several atmospheric chemistry systems,
including reactive nitrogen and organic chemistry. Plume chemistry is driven
by sunlight, and I examine how the modelled phenomena identified in this
investigation vary with the diurnal cycle.
In the modelled plume all of the bromine is involved in O3-destructive
cycling. When HBr is exhausted, volcanic HCl sustains the cycling. The
rate-limiting factor of this cycling, and therefore the rate of O3 destruction, is
sunlight.
I find qualitative differences between the chemistry of low and high intensity
plumes, with the bromine chemistry in the latter case being limited by O3
depletion.
This modelling investigation is complemented by an observational study of
O3 in a young Etnean plume from which I estimate the rate of in-plume O3
destruction within seconds to minutes after emission.
These investigations demonstrate that volcanic plumes can be included in
complex, 3D atmospheric chemistry models, and that the output from these can
be used to observe and quantify influences of volcanic plumes on the wider
atmosphere
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
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
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