Jon Blower

Jon Blower
University of Reading · The Reading e-Science Centre (ReSC)

About

77
Publications
9,361
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
965
Citations
Citations since 2016
4 Research Items
333 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (77)
Article
Full-text available
The EU Copernicus Climate Change Service (C3S) European Climatic Energy Mixes (ECEM) has produced, in close collaboration with prospective users, a proof-of-concept climate service, or Demonstrator, designed to enable the energy industry and policy makers assess how well different energy supply mixes in Europe will meet demand, over different time...
Article
Full-text available
The CF (Climate and Forecast) metadata conventions are designed to promote the creation, processing, and sharing of climate and forecasting data using Network Common Data Form (netCDF) files and libraries. The CF conventions provide a description of the physical meaning of data and of their spatial and temporal properties, but they depend on the ne...
Article
Full-text available
The CF (Climate and Forecast) metadata conventions are designed to promote the creation, processing and sharing of climate and forecasting data using Network Common Data Form (netCDF) files and libraries. The CF conventions provide a description of the physical meaning of data and of their spatial and temporal properties, but they depend on the net...
Conference Paper
New methods need to be developed to handle the increasing size of data sets in atmospheric science - traditional analysis scripts often inefficiently read and process the data. NetCDF4 is a common file format used in atmospheric and ocean sciences, and Python is widely used in atmospheric and ocean science data analysis. The aim of this work is to...
Article
Full-text available
Geospatial information of many kinds, from topographic maps to scientific data, is increasingly being made available through web mapping services. These allow georeferenced map images to be served from data stores and displayed in websites and geographic information systems, where they can be integrated with other geographic information. The Open G...
Article
Full-text available
For users of climate services, the ability to quickly determine the datasets that best fit one’s needs would be invaluable. The volume, variety, and complexity of climate data makes this judgment difficult. The ambition of CHARMe (Characterization of metadata to enable high-quality climate services) is to give a wider interdisciplinary community ac...
Conference Paper
Full-text available
As the possibilities for larger and more detailed simulations of geoscientific data expand, the need for smart solutions in data visualization grow as well. Large volumes of data should be quickly accessible from anywhere in the world without the need for transferring the simulation results. We aim to provide tools for both processing and the handl...
Conference Paper
Full-text available
The CHARMe project enables the annotation of climate data with key pieces of supporting information that we term commentary. Commentary reflects the experience that has built up in the user community, and can help new or less-expert users (such as consultants, SMEs, experts in other fields) to understand and interpret complex data. In the context o...
Article
Full-text available
Service-oriented architecture (SOA), workflow, the Semantic Web, and Grid computing are key enabling information technologies in the development of increasingly sophisticated e-Science infrastructures and application platforms. While the emergence of Cloud computing as a new computing paradigm has provided new directions and opportunities for e-Sci...
Conference Paper
The University of Reading has in developed techniques for fast visualisation of gridded data, such that they can be used in a WMS (web-map server) system. The aim is to provide data visualisation which is quick enough to be used interactively (e.g. on a website) even with very large underlying datasets. The two main tools which have come out of thi...
Conference Paper
We describe the CHARMe project, which aims to link climate datasets with publications, user feedback and other items of “commentary metadata”. The system will help users learn from previous community experience and select datasets that best suit their needs, as well as providing direct traceability between conclusions and the data that supported th...
Article
Full-text available
We describe ncWMS, an implementation of the Open Geospatial Consortium's Web Map Service (WMS) specification for multidimensional gridded environmental data. ncWMS can read data in a large number of common scientific data formats – notably the NetCDF format with the Climate and Forecast conventions – then efficiently generate map imagery in thousan...
Article
This chapter discusses the current practices and emerging new methods of environmental data visualization, exploration, and intercomparison in the particular context of the "fluid earth sciences," namely meteorology, oceanography, and climate science. The discussion is also highly relevant to other areas of study of the Earth system, particularly w...
Article
The sharing and visualization of environmental data through spatial data infrastructures is becoming increasingly common. However, information about the quality of data is frequently unavailable or presented in an inconsistent fashion. ("Data quality" is a phrase with many possible meanings but here we define it as "fitness for purpose" - therefore...
Article
Since 2009, MyOcean (http://www.myocean.eu) is providing an operational service, for forecasts, analysis and expertise on ocean currents, temperature, salinity, sea level, primary ecosystems and ice coverage. The production of observation and forecasting data is done by 42 Production Units (PU). Product download and visualisation are hosted by 25...
Article
This talk outlines investigations into the potential for videowall technology to enhance the scientific data analysis process. The talk is based on experiences gained at workshops focusing on a videowall in Harwell, England, supported by the International Space Innovation Centre. The videowall is 7.2m wide, 2.3m tall and consists of 28 individual s...
Article
Full-text available
Data quality is a difficult notion to define precisely, and different communities have different views and understandings of the subject. This causes confusion, a lack of harmonization of data across communities and omission of vital quality information. For some existing data infrastructures, data quality standards cannot address the problem adequ...
Article
The MyOcean project integrates ocean observation, forecast and analysis data from all around Europe, encompassing 61 partners from 29 countries and producing 237 real-time and delayed-mode data products. The MyOcean View Service, which has recently gone live, provides visual access to (nearly) all of the gridded data products (ocean forecast/analys...
Article
The question of data quality is a prominent topic of current research in Earth observation. However, different users have different views and visions on data quality. There exists a set of standards and specifications in relation to data quality for Earth observation (e.g. ISO standards, W3C standards, QA4EO), and how to choose appropriate one for...
Article
MyOcean system (http://www.myocean.eu) objective is to provide a Core Service for the Ocean. This means MyOcean is setting up an operational service for forecasts, analysis and expertise on ocean currents, temperature, salinity, sea level, primary ecosystems and ice coverage. The production of observation and forecasting data is distributed throug...
Article
Oceanotron (https://forge.ifremer.fr/plugins/mediawiki/wiki/oceanotron/index.php/Accueil) is an open-source data server dedicated to marine in-situ observation dissemination. For its extensibility it relies of an ocean business data model. IFREMER hosts the CORIOLIS marine in-situ data centre (http://www.coriolis.eu.org) and, as French NODC (Nation...
Article
The MyOcean project integrates ocean observation, forecast and analysis data from all around Europe, encompassing 61 partners from 29 countries and producing 129 real-time and delayed-mode data products. The MyOcean View Service, which has recently gone live, provides visual access to (nearly) all of the gridded data products (ocean forecast/analys...
Article
Full-text available
Climate-G is a large scale distributed testbed devoted to climate change research. It is an unfunded effort started in 2008 and involving a wide community both in Europe and US. The testbed is an interdisciplinary effort involving partners from several institutions and joining expertise in the field of climate change and computational science. Its...
Article
Full-text available
As part of a large European coastal operational oceanography project (ECOOP), we have developed a web portal for the display and comparison of model and in-situ marine data. The distributed model and in-situ datasets are accessed via an Open Geospatial Consortium Web Map Service (WMS) and Web Feature Service (WFS) respectively. These services were...
Article
Full-text available
As part of a large European coastal operational oceanography project (ECOOP), we have developed a web portal for the display and comparison of model and in situ marine data. The distributed model and in situ datasets are accessed via an Open Geospatial Consortium Web Map Service (WMS) and Web Feature Service (WFS) respectively. These services were...
Article
Full-text available
Currently, there are many web portals available which focus on visualizing environmental data, but for comparing datasets and carrying out analyses users turn to desktop applications such as Matlab and IDL. These are powerful, but require users to download large datasets and manually get to grips with low-level data formats and metadata conventions...
Conference Paper
In the earth sciences, data are commonly cast on complex grids in order to model irregular domains such as coastlines, or to evenly distribute grid points over the globe. It is common for a scientist to wish to re-cast such data onto a grid that is more amenable to manipulation, visualization, or comparison with other data sources. The complexity o...
Article
Full-text available
There is remarkable agreement in expectations today for vastly improved ocean data management a decade from now --capabilities that will help to bring significant benefits to ocean research and to society. Advancing data management to such a degree, however, will require cultural and policy changes that are slow to effect. The technological foundat...
Article
Volcanic eruptions are driven by the nucleation and growth of bubbles that are formed when volatile species (particularly water) exsolve from magma. Once nucleated, bubbles may continue to grow through a combination of diffusion of volatiles from the melt and decompressive expansion. The kinetics of bubble formation and growth exert a critical infl...
Article
Climate-G is a data-oriented research effort conceived in the context of the EGEE Earth Science Cluster and devoted to the Climate Change community. The testbed is an interdisciplinary effort joining expertise in the field of climate change and computational science. The main goal of Climate-G is to allow scientists carrying out geographical and cr...
Article
Full-text available
Understanding and predicting the Earth system requires the collaborative effort of scientists from many different disciplines and institutions. The National Centre for Earth Observation (NCEO) and the National Centre for Atmospheric Science Climate Group (NCAS-Climate) are both high-profile interdisciplinary research centres involving numerous univ...
Article
The use of Web technologies to visualize and explore geoscientific data is now well-established (e.g. [1]). Many systems are now available, based upon standard approaches, to provide interactive online capabilities for publishing data, hiding much of the complexities of the underlying data and infrastructure. Recently, progress has been made in mov...
Conference Paper
Many producers of geographic information are now disseminating their data using open web service protocols, notably those published by the Open Geospatial Consortium. There are many challenges inherent in running robust and reliable services at reasonable cost. Cloud computing provides a new kind of scalable infrastructure that could address many o...
Article
Full-text available
The GODAE (Global Ocean Data Assimilation Experiment) project has operated for a decade to establish a common definition and description of what is a GODAE ocean data product, and tuned each production center to routinely serve quality-controlled ocean data. A legacy of GODAE has been in harmonizing the various products and the development of essen...
Article
Earth scientists use highly diverse sources of data, including in-situ measurements, remotely-sensed information and the results of numerical simulations. Thus there is often a large amount of data available to tackle a given problem. The challenge is how best to integrate these diverse data sources in a manner which will not only provide an effect...
Article
Explosive silicic eruptions may simultaneously produce both tube pumice - containing highly-elongate vesicles - and pumice containing sub-spherical vesicles. This has been cited as evidence for strain localization within the volcanic conduit: in a relatively-undeformed axial `plug' bubbles are spherical (regime 1) whilst near the conduit margin rap...
Conference Paper
Full-text available
In the decade since OceanObs `99, great advances have been made in the field of ocean data dissemination. The use of Internet technologies in particular has transformed the landscape: users can now find, evaluate and access data rapidly and securely using only a web browser. This paper describes the current state of the art in dissemination methods...
Article
Full-text available
The Global Ocean Data Assimilation Experiment (GODAE [http://www.godae.org]) has spanned a decade of rapid technological development. The ever-increasing volume and diversity of oceanographic data produced by in situ instruments, remote-sensing platforms, and computer simulations have driven the development of a number of innovative technologies th...
Article
Full-text available
Results are presented from a new web application called OceanDIVA - Ocean Data Intercomparison and Visualization Application. This tool reads hydrographic profiles and ocean model output and presents the data on either depth levels or isotherms for viewing in Google Earth, or as probability density functions (PDFs) of regional model-data misfits. A...
Article
The Climate-G testbed provides an experimental large scale data environment for climate change addressing challenging data and metadata management issues. The main scope of Climate-G is to allow scientists to carry out geographical and cross-institutional climate data discovery, access, visualization and sharing. Climate-G is a multidisciplinary co...
Article
Full-text available
GODIVA2 is a dynamic website that provides visual access to several terabytes of physically distributed, four-dimensional environmental data. It allows users to explore large datasets interactively without the need to install new software or download and understand complex data. Through the use of open international standards, GODIVA2 maintains a h...
Article
Full-text available
Compute grids are used widely in many areas of environmental science, but there has been limited uptake of grid computing by the climate modelling community, partly because the characteristics of many climate models make them difficult to use with popular grid middleware systems. In particular, climate models usually produce large volumes of output...
Article
Earth scientists use highly diverse sources of data, including in-situ measurements, remotely-sensed information and the results of numerical simulations. The ability to access, visualize, combine and compare these datasets is at the core of scientific investigation, but such tasks have hitherto been very difficult or impossible due to a fundamenta...
Article
Full-text available
The National Centre for Ocean Forecasting (NCOF) partnership is now promoting the delivery of operational marine forecasting data over the internet, with the aim of pioneering new relationships with interested clients in government and commercial companies, and with marine and climate research organisations. This paper reviews some of the objective...
Conference Paper
Grid systems have a reputation for being difficult to build and use. We describe how the ease of use of the Styx Grid Services (SGS) software can be combined with the security and trusted nature of the Secure Shell (SSH) to build simple Grid systems that are secure, robust and easy to use and administer. We present a case study of how this method i...
Article
In order to better predict how the Earth's changing climate will affect ocean circulation, and more generally the behaviour of the ocean-atmosphere system, ocean modellers need to have the ability to accurately assimilate historical and near-real time data into their models. This process has traditionally included the use of fairly static plots of...
Article
Full-text available
Virtual globe technology holds many exciting possibilities for environmental science. These easy-to-use, intuitive systems provide means for simultaneously visualizing four-dimensional environmental data from many different sources, enabling the generation of new hypotheses and driving greater understanding of the Earth system. Through the use of s...
Article
A key advantage of Virtual Globes ("geobrowsers") such as Google Earth is that they can display many different geospatial data types at a huge range of spatial scales. In this demonstration and poster display we shall show how marine data from disparate sources can be brought together in a geobrowser in order to support both scientific research and...
Article
Full-text available
In this presentation we shall discuss our experiences with using Google Maps and Google Earth to explore and visualize oceanographic data. We focus on data from General Circulation Model analyses of ocean circulation for operational and research purposes. These datasets are produced by institutions such as the UK Met Office and the National Oceanog...
Conference Paper
The service-oriented approach to performing distributed scientific research is potentially very powerful but is not yet widely used in many scientific fields. This is partly due to the technical difficulties involved in creating services and composing them into workflows. We present the Styx Grid Service, a simple system that wraps command-line pro...
Article
Full-text available
Assimilation of salinity into ocean and climate general circulation models is a very important problem. Argo data now provide far more salinity observations than ever before. In addition, a good analysis of salinity over time in ocean reanalyses can give important results for understanding climate change. Here it is shown from the historical ocean...
Article
Full-text available
The service-oriented approach to performing distributed scientific research is potentially very powerful but is not yet widely used in many scientific fields. This is partly due to the technical difficulties involved in creating services and workflows and the inefficiency of many workflow systems with regard to handling large datasets. We present t...
Article
Grid systems have a reputation for being difficult to build and use.We describe how the ease of use of the Styx Grid Services (SGS) software can be combined with the security and trusted nature of the Secure Shell (SSH) to build simple Grid systems that are secure, robust and easy to use and administer. We present a case study of how this method is...
Article
The flow of exsolved gases through the volcanic system exerts a fundamental control on the nature of a volcano's activity. Gas flow determines the internal pressure of magmatic bubbles and so strongly influences bubble growth kinetics and the process of magma fragmentation, both of which exert a first-order control on the magnitude and intensity of...
Conference Paper
Full-text available
Modern computer simulations and satellite observations of the oceans and atmosphere produce large amounts of geospatial data on the terabyte scale. These datasets are very valuable to the community as a whole, for scientific research, directing government policy and operational activities such as aviation, search and rescue at sea and oil spill mit...
Article
We review observations of bubble size distributions (BSDs) generated during explosive volcanic eruptions and laboratory explosions, as inferred from vesicle size distributions found in the end products. Unimodal, polymodal, exponential and power law BSDs are common, even in the absence of coalescence, and both power law and exponential distribution...
Article
A model has been developed to investigate the sensitivity of magma permeability, k, to various parameters. Power-law relationships between k and porosity φ are revealed, in agreement with previous experimental and theoretical studies. These relationships take the form \(\) \(\hat k = k/r^2 = a(\phi - \phi _{cr} )^b \) where r is the mean bubble rad...
Article
The coupling of viscosity and diffusivity during explosive volcanic degassing is investigated using a numerical model of bubble growth in rhyolitic melts. The model allows melt viscosity and water diffusivity to vary spatially and temporally with water content. We find that the system is highly sensitive to the distribution of volatiles around the...
Article
Full-text available
Both power law and exponential vesicle size distributions (VSDs) have been observed in many dierent types of volcanic rocks. We present results of computer simulations and laboratory analogue experiments which reproduce these ndings and show that the distributions can be interpreted as the product of continuous bubble nucleation resulting from non-...
Article
Thesis (Ph. D.)--University of Bristol, 2001.