CEDA Repository
Not a member yet
1250 research outputs found
Sort by
The CMIP6 Data Request – with overview of IPCC process
No full textThe CMIP6 Data Request specifies the data requirements for the CMIP6 model inter-comparison project. The presentation includes a review of the CMIP5 archive and of the process of exploitation by the IPCC
Semantic storage of climate data on object stores
No full textNew methods for storing large volumes of data, such as cloud systems and object storage present opportunities:
• Improved access and user management over POSIX
• Parallel reads / writes
• Read / write from anywhere (no need to mount disks)
and challenges:
• Interface and access methods for users are changed
• Exploit parallel and remote access nature of stores with S3 HTTP API
• While maintaining a familiar and consistent API for the user
• S3-netCDF-python:
• Library to read/write netCDF 3 and netCDF 4 via a S3 HTTP API
• Files can be streamed directly to memory or cached to disk
• Files can be split into smaller objects
• Multiple objects can be streamed in paralle
Met Office NWP global model revision history
No full textThis page lists the full operational history of the Met Office deterministic global model since the introduction of the UM in 1991. Whilst other sources will contain more detailed information, this page
highlights the most significant changes
Bringing NCAS data to the masses: CEDA catalogue developments and service intergrations 2017
No full textThe Centre for Environmental Data Analysis (CEDA) hosts an archive of over 180 million files across 5000 data sets. Enabling users to find these data and to ensure NCAS meets its EU Inspire requirements is a fundamental operation of CEDA. Over the last year CEDA has rolled out a number of service updates to aid data discoverability and provide further integration with other CEDA services. The search tool has been changed to include an alternative (Beta) service based on a search engine technology (ElasticSearch) to speed up response times, improve accuracy and search across multiple record types. Other enhancements focus on data management issues such as tagging relationships between data sets and ordering data set lists based on relevance and status. An HTTP API has been added that can retrieve the relevant data set record based on a file or directory path. This approach enables other services to dynamically interrogate the catalogue service to improve automated interactions between CEDA systems. Finally, a new set of bespoke web views have been generated in order to describe AMF data sets, based on campaigns, instruments and long-term facilities
FIDUCEO project: Principles behind the FCDR effects table
No full textThis document describes the FCDR effects tables being developed in the FIDUCEO project. It has the following aims: To describe what the effects table is, how it is to be filled in by FCDR developers and how it is anticipated to be used. To record (in appendices) the derivation of equations for the different correlation forms. It forms the basis of the overall deliverable D2-2, and has been developed in parallel with the sensor specific partner documents describing the effects tables for each of the 4 FCDRsin the FIDUCEO project
FIDUCEO Project: (MVIRI): Report on the MVIRIFCDR: Uncertainty
No full textThis document is one of the five documents that make up the D2-2 report on “traceability chains for FCDRs”. Since the original project proposal our thoughts have refined and while this document describes the “sequence of measurement standards and calibrations that is used to relate a measurement result to a reference” (the VIM definition of a traceability chain), it is not presenting this in the form of a chain. This document provides an overview of the uncertainty analysis for the analysed sensors along with the methods to establish metrological traceability for the developed FCDRs. This document is specifically about the MVIRIFCDR. The document D2-2a provides an overview of the effects tables
HadISDH Update Document version 3.0.0.2016p
No full textHadISDH update document covering the latest changes in version V3.0.0.2016p from previous versions
NERC MSTRF Sky-Camera Time-Lapse Video for 2008-01-02 15:00 UTC (showing Altocumulus lenticularis clouds revealing Mountain Wave activity).
No full textA time-lapse video showing Altocumulus lenticularis clouds revealing
Mountain Wave activity. Notice how the positions of the clouds remain fixed relative to the landscape. This contrasts with the lower-level (Cumulus) clouds, seen at the beginning of the sequence, which move downstream with the wind. This video has been created from images taken by the NERC MST Radar Facility's Sky-Camera, which is located near Aberystwyth in West Wales. The images are freely available, under an Open (UK) Government License, from http://tinyurl.com/nerc-mstrf-sky-camera/ . For an explanation of the atmospheric phenomena that can be seen, download the resource available at http://cedadocs.ceda.ac.uk/1259/
Implementation of the Met Office global model upgrade at PS39
No full textThis document is taken from the Met Office Numerical Weather Prediction (NWP) Wiki. It describes some of the technical changes included in the global upgrade at PS39
STFC Centre for Environmental Data Analysis (CEDA) Annual Report 2016 (April 2016-March 2017)
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, and consolidated annual reports have been produced since 2009. This annual report presents key statistics for the year past (2014- 2015) as well as a series of snapshots of activity, expressed as short highlights and short reports. Key data centre metrics are also provided.
This year was characterised by the major upgrade in JASMIN capability(JASMIN being the data intensive supercomputer which provides the fabric upon which CEDA and the CEDA services are delivered). As in the advent of JASMIN itself, in early 2012, this has had a major impact both on what CEDA can do, and the services that can be offered to the community — and the uptake in the community is clear to see in the statistics presented here. The consequences for CEDA itself are still being worked through, but it is clear that there is a significant expansion in the role of CEDA staff whose expertise must now embrace support for “big data” tools and algorithms by archive and other users on JASMIN. Notwithstanding this new role, as in previous years, CEDA staff are involved in nearly all the major atmospheric science programmes underway in the UK, in many earth observation programmes, and in a wide range of informatics activities.
Over the years we have reported our key partnerships, and as before, these revolve around our neighbours on the Harwell site (including the Satellite Applications Catapult, with whom we share delivery of the facility for Climate and Environmental Monitoring from Space, CEMS), the European Network for Earth Simulation (with whom we share the delivery of the European component of the Earth System Grid Federation), and many other project collaborators