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Links between DAOS-WG and ET-EGOS

John Eyre(Chair ET-EGOS)

DAOS-WG, 4th meeting, Exeter, 27-28 June 2011

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Links between

WMO/CAS/THORPEX/ICSC/DAOS-WG

and

WMO/CBS/OPAG-IOS/ET-EGOSExpert Team on Evolution of Global Observing Systems

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WMO structure

WMO

|

Commissions

CAS CCl CAeM CHy CBS CAgM CIMO JCOMM

| | .

Open Programme Area Groups (OPAGs)

IOS ISS DPFS PWS

| .

Expert Teams .

ET-EGOS ET-SAT ET-SUP ET-AWS ET-AIR ET-SBRSO

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Global observing systems: the evolution process

User requirements for observations

Implementation

Plan

Programmes of Members and

Agencies

Gap Analyses

(Statements of Guidance)

Long-term Vision for

global observing systems

 

Observing capabilitiesUser requirements

for observationsUser requirements for observations

User requirements for observations

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ET-EGOS: tasks

• Run “Rolling Review of Requirements” (RRR) process– observation requirements

– observing system capabilities

– “Statements of Guidance” (gap analyses)

– implications for evolution of observing systems– assess studies of real/hypothetical changes to observing systems,

with the assistance of NWP centres

• Develop new version of Implementation Plan for Evolution of global observing systems, based on the “Vision for the GOS in 2025”

• Application areas: Global NWP, High-res. NWP, Seasonal and inter-annual forecasting,

Aeronautical met., Nowcasting and VSRF, Atmospheric chemistry, Ocean applications, Hydrology, Climate (GCOS), Climate (CCl), …

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Vision for the GOS in 2025

http://www.wmo.int/pages/prog/www/OSY/GOS-redesign.html

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General themes and issues

• Response to user needs

• Integration

• Expansion

• Automation

• Consistency and homogeneity

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Space-based component of the GOS

• Operational geostationary satellites • Operational polar-orbiting sun-synchronous

satellites• Additional operational missions in appropriate

orbits• Operational pathfinders and technology

demonstrators• Polar and geo platforms/instruments for space

weather

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Space-based component of the GOS (2)

Some trends – what will be delivered?• Expanded observing capability • Higher resolution – spatial, temporal, spectral• Improved availability and timeliness of data• Improved calibration and inter-calibration

Some trends – how will it be delivered?• Expanded community of contributing agencies• Increased collaboration between agencies• R&D satellites playing an increasing role• R&D capabilities progressively transferred to operations• Use of constellations of satellites

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Surface-based component of the GOS (1)

• Land – upper-air• Land – surface• Land – hydrology• Land – weather radar• Ocean – upper-air• Ocean – surface• Ocean – sub-surface• R&D and operational pathfinders

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Surface-based component of the GOS (2)

Some trends and issues:

• Improvements: more observed variables, accuracy, resolution, …• Improved support to nowcasting and very short-range forecasting

• Radiosonde network – optimisation, GUAN, GRUAN• Aircraft systems – expansion of fleet, of variables measured, …• Land-surface stations – includes GSN, wider variety of networks• Surface marine – improved temporal resolution and timeliness• Ocean sub-surface – in situ, gliders, …• Improved weather radar – enhanced accuracy, coverage, variables ..• Other remote sensing – profilers, coastal HF radar, GNSS, …• Lightning detection – long-range, and high-resolution short-range• Atmospheric composition – new strategy, integration (WIGOS)

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Implementation

• The new Vision – a realistic aspiration and target for 2025– Long development lead-times for some components

• CBS endorsed the new Vision in 2009

Now working on new Implementation Plan– Provide guidance for WMO Members and partner

consortia– Propose roles for fulfilling the new Vision– Set out “road-map” for achieving it

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Role of impact studies

• OSEs• OSSEs• Forecast impact of observations• Other impact studies• Network design studies• …

NWP centresWorkshops on

THORPEX Impact of Obs ET-EGOSin NWP

othersNext (5th) workshop – 22-25 May 2012, Arizona

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Proposed impact studies (1)

• What density of surface pressure observations over ocean is needed to complement high-density surface wind observations from satellites?

• What network of in situ observations is needed in the stratosphere to complement current satellite observations (including radio occultation)?

• What is the impact of AMDAR observations?• What is the impact of coverage of profiles from ASAPs?• What are the impacts of radar observations, including

radial winds and reflectivities?

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Proposed impact studies (2)

• At what level does the impact of radio occultation observations start to saturate?

• What is the impact of new developments in the assimilation of radiance data over land?

• What benefits are found when data from more than one passive sounder are available from satellites in complementary orbits

• What impacts are found from AMVs?

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Proposed impact studies (3)

• What impacts/benefits are found from data density/thinning strategies

• What should be the focus of improvements for observations of the PBL in support of regional/high-resolution NWP?

• Can EUCOS-like upper air studies be performed for other regions?

• What insights can be gained from more tailored use of adjoint- and ensemble-based measures of observation impact?

• Which observations are particularly important for 7-14 day forecast range?

• What do experiments on targeted observations tell us about observing system design?

• What impacts/benefits could be expected by sustained components of the AMMA and IPY special observing systems?

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Concluding remarks

• ET-EGOS welcomes help and advice from THORPEX on questions relevant to the cost-effective evolution of global observing systems

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End

Thank-you for your attention

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Space-based component of the GOS (1)

Operational geostationary satellites

– at least 6 – each with: • Infra-red/visible multi-spectral imager• Infra-red hyper-spectral sounder• Lightning imager

Operational polar-orbiting sun-synchronous satellites

- in 3 orbital planes – each with:• Infra-red/visible multi-spectral imager • Microwave sounder • Infra-red hyper-spectral sounder

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Space-based component of the GOS (2)

Additional operational missions in appropriate orbits:• Microwave imagers• Scatterometers• Radio occultation constellation• Altimeter constellation• Infra-red dual-view imager – sea surface temperature• Advanced visible/NIR imagers – ocean colour, vegetation• Visible/infra-red imager constellation – land-surface• Precipitation radars• Broad-band visible/IR radiometers – radiation budget• Atmospheric composition monitoring instruments• Synthetic aperture radar

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Space-based component of the GOS (3)

Operational pathfinders and technology demonstrators:• Doppler wind lidar • Low-freq. microwave radiometer – salinity, soil moisture• Microwave imager/sounder on geos - precipitation• Advanced imagers on geos• Imagers on satellites in high-inclination, elliptical orbits• Gravimetric sensors – water: lakes, rivers, ground

Polar and geo platforms/instruments for space weather

- for solar imagery, particle detection, electron density

The surface-based component 

 

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Surface-based component of the GOS (2)

Land – upper-air• Upper-air synoptic and reference stations• Aircraft• Remote-sensing upper-air profiling stations• Atmospheric composition stations• GNSS receiver stations

Land – surface• Surface synoptic and climate reference stations• Lightning detection system stations • Atmospheric composition stations• Application-specific stations (road weather, airports, agromet.,

urban met., …)

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Surface-based component of the GOS (3)

Land – hydrology• Hydrological reference stations• National hydrological network stations

Land – weather radar• Weather radar stations

Ocean – upper-air• Automated Shipboard Aerological Programme (ASAP) ships

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Surface-based component of the GOS (4)

Ocean – surface• Synoptic sea stations – ocean, island, coastal, fixed platform• Ships• Buoys – moored and drifting• Ice buoys• Tide stations

Ocean – sub-surface• Profiling floats• Ice tethered platforms• Ships of opportunity

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Surface-based component of the GOS (4)

R&D and operational pathfinders - EXAMPLES• GRUAN stations • UAVs• Gondolas• Aircraft – chemistry, aerosols, …• Instrumented marine animals• Ocean gliders• …