Climate reanalysis at ECMWF Reanalysis is based on analysis methods developed to provide initial states for numerical weather prediction It applies a fixed, modern data assimilation system to multi-year sets of observations of different types New reanalysis products benefit from improvements in ECMWF operational forecas % “Forecasts” from ECMWF reanaly %
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Climate reanalysis at ECMWF Reanalysis is based on analysis methods developed to provide initial states for numerical weather prediction It applies a fixed,
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Climate reanalysis at ECMWF
Reanalysis is based on analysis methods developed to provide initial states for numerical weather prediction
It applies a fixed, modern data assimilation system to multi-year sets of observations of different types
New reanalysis products benefit from improvements in forecast skill, data assimilation methods, and ongoing data recovery and data reprocessing efforts
ECMWF operational forecasts
%
“Forecasts” from ECMWF reanalyses
%
ERA-CLIM Project Overview
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The ERA-CLIM Project
• ERA-CLIM: European Reanalysis of Global Climate Observations• 3-year collaborative research project, start date 01/01/2011• Funded by EU research FP7, Environment theme• Total cost €4.9M; EC contribution €3.5M• 8(9) partners, 47.5(59) person-years, 50 deliverables
47%
12%
14%
24%
3%
Work packages:
Data recovery
Other input data
Integration
Uncertainty
Management
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ObjectivesAddressing the call for proposals:
Building observational datasets for the predictability of global atmospheric, oceanic and terrestrial processes using reanalysis techniques
As stated in the project proposal:
• Development of the observational record for the early 20th century• Preparation of satellite observations, boundary conditions, and forcing data for an
atmospheric reanalysis of the 20th century (ERA-20C)• Development of an Observation Feedback Archive for reanalysis• Production of pilot case reanalyses and data quality information• Assessment and reduction of data uncertainties
Additional goals:
• Improving access to climate data, quality, and transparency• Developing a sustained data recovery and reanalysis capability• Meeting the requirements for future GMES climate services
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DeliverablesObjectives Key deliverables
Development of the observational record for the early 20th century
Inventories; database for metadata, web-based digitising tools
WP1Digitized, quality-controlled instrumental records for the early 20th century
Access to observations and metadata via international data centres
Preparation of reprocessed satellite observations, boundary conditions, and forcing data
Reprocessed satellite data sets for input to reanalysis; early satellite records
WP2Ensemble of consistent sea-surface boundary conditions for the 20th-century
Atmospheric forcing data (solar, aerosols, GHG, land surface…) for ERA-20C
Development of an Observation Feedback Archive (OFA)
Database facility for input observations with quality feedback from reanalyses
WP3A series of long test reanalyses at various resolutions to prepare for ERA-20CProduction of pilot reanalyses and data quality information All reanalysis products and input observations available via web services
Assessment and reduction of data uncertainties
Homogenized in-situ data and bias correction techniques
WP4Improved ocean observations for reanalysis
Tools for quality assessment of reanalysis products
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Work packages
1. Recovery, imaging, and digitisation of historical observations and metadata
2. Preparation of satellite observations, boundary conditions, and forcing data
3. Integration of observational climate data sets (reanalyses)
4. Quantifying and reducing uncertainties
5. Project management and coordination
WP5
WP4
WP3
WP2
WP1
ECMWF
UKMET
UNIVIE
UBERN
RIHMI
FFCUL
EUMST
METFR
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WP1: Recovery, imaging, and digitisation of historical observations and metadata
WP1: Recovery, imaging, and digitisation of historical observations and metadata
1 First HadlSST2 dataset UKMET 6 01/09/20112 Survey of early satellite radiance data UKMET 5 01/12/20113 Ensemble of HadlSST2 realizations UKMET 5 01/12/20114 Upgrade of RTTOV for early satellites UKMET 3 01/03/20125 Reprocessed Meteosat observations EUMST 12 01/09/20126 Documentation of homogenized SSMT2, AMSUB, and MHS radiance dataUKMET 2 01/09/20127 Final HadlSST2 dataset for ERA-20C UKMET 12 01/09/20128 Solar, ozone, and volcanic aerosols forcing data UBERN 3 01/09/20129 Reprocessed AVHRR winds EUMST 3 01/12/2012
10 Reprocessed GPS radio occultation data EUMST 6 01/12/201211 Proposal for boundary conditions & forcing in ERA-20CUBERN 1 01/12/201212 Proposal for using early satellite and EUMETSAT data in ERA-20CEUMST 2 01/06/201313 Reprocessed MetOp ozone and ASCAT data EUMST 6 01/12/2013
1 Regular Management Board meetings ECMWF 4 01/01/20112 Plan for dissemination of project results ECMWF 2 01/12/20113 Meetings of the General Assembly ECMWF 2 01/12/20114 Advisory Board meetings ECMWF 2 01/12/20115 Activity reports and management reports for the CommissionECMWF 2 01/06/20126 Reanalysis conference ECMWF 2 01/06/20137 Proposal for sustained European capability for global reanalysis of climate observationsECMWF 2 01/12/20138 Project website ECMWF 1 01/08/20119 Project leaflet ECMWF 1 01/10/2011
2011 2012 2013
ECMWF
UKMET
UNIVIE
UBERN
Deliverables (9):
Person-months (18):
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•WP5 lead is ECMWF•2 person-months for each WP lead
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Meantime…
Conclusions
• ERA-CLIM is an essential step towards the future ECMWF global reanalysis ERA-20C.
• This project is directly supported by EU-FP7
• Additional support to reanalysis activities is provided by:– ESA– Japan– UK (NCEO, NCAS)
• ERA-interim remains the best reanalysis in the world in many aspects– This resource should be used widely by the climate community