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Metrology for climate. Metrology priorities for the earth observation and climate community.

Barker, A; Banks, A; Bell, W*; Dowell, M*; Fox, N P; Green, P; Lecomte, P*; Merchant, C*; Saunders, R*; Schultz, J*; Whitney, M (2015) Metrology for climate. Metrology priorities for the earth observation and climate community. Technical Report.

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This report summarises the conclusions of discussions between climate experts and the metrology community (in this context national metrology institutes) held over two days at the National Physical Laboratory in May 2015. The objectives of the workshop and the framework for the discussions were established by leading climate experts including those representing the major European international organisations: EU, ESA and EUMETSAT.
The principle objective was, following a review of the requirements and measurement status of the Essential Climate Variables (ECVs) of Global Climate Observing System (GCOS), to determine and where possible prioritise, the research efforts of the metrology community to meet the needs of the climate community. As part of the process, the group also considered the adequacy of the GCOS monitoring principles and specific ECV requirements from a metrological perspective and have identified a number of generic and specific recommendations for consideration during the forthcoming review phase.
The recommendations to GCOS, the metrology community and the Earth Observation and climate community are summarised below in their most generic form. Specific examples and details for individual ECVs can be found within the relevant sections in the report and its final summary. One of the most notable and overarching recommendation is that mechanisms should be sought to encourage greater on-going dialogue between the two communities across the full lifecycle of establishing long-term Climate Data Records: from design of a measurement system through to the linking of multi-decadal data sets i.e. beyond simply providing the nominal calibration of an instrument.
If society is to take potentially costly action on the information derived from these measurements it is an obligation on the science community to ensure that appropriate levels of confidence and quantification of uncertainty are assigned to them in a consistent and robust manner. To achieve this requires a globally coordinated, comprehensive and sustained observing system of satellite and in situ validation measurements that have documented descriptions, and transparent evidence of their traceability and associated breakdown of uncertainty to an invariant reference(s), ideally tied to the international system of units. Where these measurements are further processed into derived bio-geophysical products and/or combined together to form long time base records, these processes should similarly be carried out and documented with the same degree of rigour in terms of traceability and uncertainty as the underpinning measurements

Item Type: Report/Guide (Technical Report)
Keywords: Metrology, Earth Observation, Satellite, ECV, GCOS, CDR, FCDR
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Environment and Climate Change
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6728

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