CEDA Repository
Not a member yet
1250 research outputs found
Sort by
Optimization of two-phase thermophilic anaerobic digestion of biowaste for bio-hythane production through reject water recirculation
No full textThe optimization of a two-phase thermophilic anaerobic process treating biowaste for hydrogen and methane production was carried out at pilot scale using two stirred reactors (CSTRs) and without any physical/chemical pretreatment of inoculum. During the experiment the hydrogen production at low hydraulic retention time (3d) was tested, both with and without reject water recirculation and at two organic loading rate (16 and 21 kgTVS/m3d). The better yields were obtained with recirculation where the pH reached an optimal value (5.5) thanks to the buffering capacity of the system. The specific gas production of the first reactor was 51 l/kgVSfed and H2 content in biogas 37%. The mixture of gas obtained from the two reactors met the standards for the biohythane mix only when lower loading rate were applied to the first reactor, with a composition of 6.7% H2, 40.1% CO2 and 52.3% CH4, and with an overall SGP of 0.78 m3/kgVSfed
Airborne Research and Survey Facility Data - CEDA Summer Work Placement
No full textA presentation covering work carried out during summer 2012 to improve ARSF holdings at NEODC. It explains work carried outto improve the ARSF metadata holdings at the NEODC by improving information held on per flight. Scripts used to ingest ATM data into the NEODC archive and to create preview images of the ATM data are explained. Additional steps explaining the preparation of file attribute information on specific flights for use in CEDA's File Attribute Catalogue (CEDA FAtCat) are also explained
New Online Access to Old Solar Data
No full textThe UK Solar System Data Centre has been working to make two of its historical solar data sets accessible online.
These data sets contribute to the long-term record of solar activity, pre-dating the space age by many decades. It is hoped that by making them more accessible to researchers and by publicising their availability, they can contribute new data to current areas of research
Findings of the UKSSDC Data Prioritisation Survey
No full textIn April and May 2011 the UK Solar System Data Centre asked users and potential users to complete a brief, online survey. The aim was to find out which data sets and services were priorities for users now and in the future, and to invite suggestions of useful additions. The data centre also asked for general feedback on how satisfied users were with its service
STFC Centre for Environmental Data Archival(CEDA)Annual Report 2011(April 2010-March 2011)
No full textThe mission of the Centre for Environmental Archival (CEDA) is to deliver long term curation of scientifically important environmental data at the same time as facilitating the use of data by the environmental science community. CEDA was established by the amalgamation of the activities of two of the Natural Environment Research Council (NERC) designated data centres: the British Atmospheric Data Centre, and the NERC Earth Observation Data Centre. The process began with administrative functions (in 2005) and has proceeded steadily since, as new activities have and continue to be accreted into CEDA. Until 2008, the constituent parts of CEDA reported independently to NERC, but in 2009 we produced the first public report for CEDA. We are pleased to present here our third annual report, covering activities for the “2010” year (actually from April 2010 to the end of March 2011). The report
itself is in two sections, the first broadly providing a summary of activities and some statistics with some short descriptions of some significant activities, and new this year, a second section introducing some of the staff, and what they do from day-to-day. (Note that although the UK solar system data centre joined CEDA in this year, we have yet to include significant reporting from that activity.)
CEDA staff are involved in nearly all the major atmospheric science programmes under way in the UK, in many earth observation programmes, and in a wide range of informatics activities. The CEDA involvement in informatics is main targeted at achieving three main objectives: (1) Providing suitable tools to document and manage both high volume and highly heterogeneous data both in CEDA and the
community; (2) Delivering tooling and services to enable the community to exploit CEDA data holdings, and; (3) Improving the ability of fundamental standards both to improve the likelihood that others can build standards compliant software we can deploy, and to support interdisciplinary science.
While all of these activities are of course aimed squarely at supporting the UK community, of necessity, and like the science programmes in which we work, we could not complete our objectives without both building on and contributing to other activities – both in the UK and abroad. In particular we rely on partnerships we have built with other organisations so that we can leverage the informatics investments elsewhere to deliver solutions to the three objectives above. One of our closest partnerships is with the German Climate Computing Center (DKRZ), but we have strong connections with a range of other institutions, particularly those within the Global Organisation for Earth System Science Portals (GOESSP, see http://go-essp.gfdl.noaa.gov). Other important relationships include with the Met Office, our sister data centres in the Natural Environment Research Council community, and the European space data community (in particular the European Space Agency).
In the report that follows it will be seen that many of our activities involve partners from the list above delivering solutions in support of our two main scientific communities: the UK atmospheric and earth observation communities. In 2010 these communities delivered two especially major challenges to CEDA, challenges which are likely to be with us for some years: firstly, how to acquire, document, distribute, and support the massive amounts of data being produced by international model intercomparison projects (and in particular, CMIP5); and secondly, how to develop a strong engagement with the new International Space Innovation Centre sharing our site at Harwell. Clearly ISIC provides us with a vehicle which could greatly strengthen our ability for the data collected by the UK academic community to make greater commercial and scientific impacts. Our highlights section indicates some of the activities we have begun in support of these two challenges, and we might expect to see much more on these in future years.
I trust that whatever your background, you can find something of interest in the material presented here.
Bryan Lawrence, Directo
Orographic Flows and the Climate of the Antarctic Peninsula (OFCAP)
No full textReport on the meteorological, radiosonde and BAS Masin twinotter aircraft data collected during the OFCAP field campaign Jan-Feb 2011, Antarctica
The UK Climate Prediction 2009 (UKCP09) Threshold Detector Manual v1.2.0
No full textThe UK Climate Prediction 2009 (UKCP09) Threshold Detector Manual provides supporting information on detecting thresholds in the UKCP09 datasets
Validation of Weather Generator outputs
No full textThe purpose of this technical note is to provide additional Weather Generator (WG) validation plots to supplement those found in Chapters 1 and 3 of the UKCP09 Weather Generator Report. In this note, a further nine stations spread over the UK (see Figure 1 and Table 1) are included to give a variety of climate types. All plots are produced using the same methodology described in Chapters 1 and 3. Additional plots of extreme indices are also included here, plotted from statistics produced by the STARDEX indices software – see Table 2 for definitions
Environmental Data Archival: Practices and Benefits
No full textAn overview of the reasons why archiving environmental data properly is an important activity and the benefits to both data suppliers and end users. The talk will give examples from the work of the Centre for Environmental Data Archival at the Rutherford Appleton Laboratory which runs both of NERC's British Atmospheric and Earth Observation Data Centres (BADC and NEODC) covering data delivery, archiving, discovery, visualisation and manipulation services at a facility responsible for over 1 Pb of important environmental data
2010 CEDA User Survey Report � Benefits of the CEDA data centres
No full textIn January 2010 the Centre for Environmental Data Archival (CEDA)�s user communities of the NERC Earth Observation and British Atmospheric data centres (NEODC and BADC respectively) were surveyed as part of a joint RIN-JISC survey examining the �Benefits of research data centres�. The results indicate there are little difference between the BADC and NEODC user communities and that overall CEDA is highly regarded in the way it supports research through financial and time efficiencies in data acquisition for research.
The data collected were reported as part of the larger RIN-JISC study : "Data centres: their use, value and impact" (see http://www.rin.ac.uk/our-work/data-management-and-curation/benefits-research-data-centres), but also provide a useful evidence base for CEDA to ensure future data archive
provision continues to meet the requirements of the research community