EUMETNET

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EUCOS
Further development of the EUMETNET Composite
Observing System

• TECO-2008 - WMO Technical Conference on
• Meteorological and Environmental Instruments and
  Methods of Observation
• St. Petersburg, Russian Federation, 27-29
  November 2008
• Stefan Klink, Jochen Dibbern and Tanja Kleinert
• EUCOS Team

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Content

• About EUMETNET and EUCOS
• EUCOS objectives
• The current EUCOS network
• Studies Programme
• Space-Terrestrial study and recommendations
  derived from it
• EUCOS upper-air network redesign
• PREVIEW Data Targeting System
• Future plans

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About EUMETNET and EUCOS (1)
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About EUMETNET and EUCOS (2)
EUCOS OPERATIONAL PROGRAMME
E-AMDAR
Fully integrated programmes
E-ASAP (including OWS M and Ekofisk)
E-SURFMAR (surface marine buoys and VOS)
WINPROF
Integration in 2008
Territorial Segment (upper air and RBSN stations)
Collaborative components
Operations Monitoring
Managed by EUCOS team
Studies Programme
Possible Future Programmes
Evolving needs
Observation Targeting
Programme Components
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EUCOS Information System ( www.eucos.net )
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EUCOS objectives (1)
EUCOS Serving the Regional Scale NWP
requirement for observations over the European
region
Warnings and Info Services
Climate, Climate prediction
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EUCOS objectives (2)

• Design and coordinate the evolution of the ground
  based EUMETNET composite observing system (EUCOS)
  to be optimized at European scale with a view to
  improve short range forecast over Europe without
  increasing the overall cost
• Monitor and control EUCOS performance
• Ensure integrated management for agreed
  components such as E-ASAP, E-AMDAR, E-SURFMAR
  (and WINPROF)
• Support the evolution of EUCOS through a
  studies programme

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EUCOS objectives (3)
EUCOS area (10N-90N, 70W-40E)
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The current EUCOS network (1)

• All European ships of the Automated Ship
  Aerological Programme ASAP(10 E-ASAP integrated,
  5 national)
• All measurements from European commercial
  aircraft (AMDAR)
• Ocean weather ship M and Ekofisk oil platform
• Selected moored buoys and all European drifting
  buoys
• European Voluntary Observing Ships
• Selected European radiosonde stations
• Selected European synoptic weather stations

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The current EUCOS network (2)
E-ASAP RS ascents on a 2 x 2 grid during 2007
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The current EUCOS network (3)
E-AMDAR
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The current EUCOS network (4)
E-SURFMAR EGOS then EUCOS drifting buoys,
average number of hourly observations per day
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EUCOS network performance 2007
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Studies Programme

• Impact Studies as a measure to guideline the
  evolution of EUCOS
• (External) drivers and developments
• Different observation networks evolve differently
  (e.g. regarding availability, accuracy, cost,
  ...)
• Data assimilation algorithms improve and can make
  use of more data
• EUCOS objective
• Design and coordinate the evolution of the ground
  based EUCOS to be optimized at European scale
  with a view to improve short range forecast ...
• ? A modification of the meteorological observing
  network might become necessary
• EUCOS needs approval for network changes or
  modifications from PB-OBS and EUMETNET Council
  respectively
• In order to get the 24 Members convinced of such
  changes it was decided to base them on scientific
  analyses (e.g. impact studies)

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Space-Terrestrial Study and recommendations
derived from it (1)

• Motivation need to better understand the
  relative contribution of satellite and
  ground-based observations so that the total
  system may be progressively optimised
• five European NWP centres agreed running
  Observation System Experiments (OSE), thereby
  relying on common scenarios, time periods and
  verification procedures
• The following scenarios were defined
• Baseline all current satellite observations used
  in NWP GUAN radiosonde network hourly GSN
  surface land data hourly buoys (no ship data)
• Control full combined observing system
• And different additions to the Baseline
  (radiosondes, wind profiler, aircraft
  measurements).

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Space-Terrestrial Study and recommendations
derived from it (2)
The studies lead to a list of general
conclusions, compiled at the 2007 E-SAT meeting
(complete list can be found in the proceedings)

• Compared to Baseline all additional ground based
  observing systems have a positive impact on the
  forecast skill. On top of the additional
  available satellite data further improvements of
  the ground based observing system are important.
• The radiosonde network is still the most
  important component of the ground based upper-air
  observing network.
• The impact of aircraft measurements is
  significant and second largest ...
• AMDAR humidity is seen as a high priority
  project.
• ...

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EUCOS upper-air network redesign (1)

• Motivation
• Significant evolution of the European AMDAR
  network
• Members were not able to install the proposed
  EUCOS radiosonde network design with 4 ascents
  per day at most of the sites
• Results from the Space Terrestrial Studies are
  available with recommendations for the network
  design

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EUCOS upper-air network redesign (2)
Proposed OSE scenarios
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PREVIEW Data Targeting System

• Aim of data targeting make additional
  observations when and where they will be most
  beneficial to subsequent forecasts
• A pre-operational Data Targeting System (DTS) has
  been developed to assess the feasibility of
  operational adaptive control of the observing
  system
• 50 / 50 funding from EUCOS and EC
• 505 high impact cases were proposed and 446
  accepted by the lead user
• During 11 months trial period 87 of requested
  radiosonde ascents from land stations had been
  deployed
• DTS is described in the latest issue of the
  ECMWF newsletter

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Future plans
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Questions and Comments?
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