THE GLOBAL CLIMATE OBSERVING SYSTEM (GCOS) and THE GLOBAL TERRESTRIAL OBSERVING SYSTEM (GTOS)
Slide 1 ECMWF Training Course - The Global Observing System - 06/2013 The Satellite Global Observing...
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Transcript of Slide 1 ECMWF Training Course - The Global Observing System - 06/2013 The Satellite Global Observing...
Slide 1
ECMWF Training Course - The Global Observing System - 06/2013
The Satellite Global Observing System
Stephen English
1. A brief introduction to the Satellite GOS2. Monitoring of satellite observations3. OSCAR – WMO’s database for global observations,
user requirements and gap-analysis
Slide 2
ECMWF Training Course - The Global Observing System - 06/2013
What types of satellites are used in NWP?
Advantages Disadvantages
GEO - Regional coverage No global coverage by single satellite
- Temporal coverage
LEO - Global coverage with single satellite
Slide 3
ECMWF Training Course - The Global Observing System - 06/2013
Radio occultation
Geo IR and Polar MW Imagers
Feature tracking in imagery (e.g. cloud track winds), scatterometers and doppler winds
Geo IR Sounder
Radar andGPS total path delay
PolarIR + MWsounders
MoistureMass
Wind
Composition
Ultraviolet sensors
Sub-mm,and near IR plusVisible (e.g. Lidar)
IR = InfraRedMW = MicroWave
Slide 4
ECMWF Training Course - The Global Observing System - 06/2013
Satellite data used by ECMWF
Slide 5
ECMWF Training Course - The Global Observing System - 06/2013
Slide 6
ECMWF Training Course - The Global Observing System - 06/2013
Combined impact of all satellite data
EUCOS Observing System Experiments (OSEs):
• 2007 ECMWF forecasting system,• winter & summer season,• different baseline systems:
• no satellite data (NOSAT),• NOSAT + AMVs,• NOSAT + 1 AMSU-A,
• general impact of satellites,• impact of individual systems,• all conventional observations.
500 hPa geopotential height anomaly correlation
3/4 day
3 days
Slide 7
ECMWF Training Course - The Global Observing System - 06/2013
Selected statistics are checked against an expected range.
E.g., global mean bias correction for GOES-12 (in blue):
Soft limits (mean ± 5 stdev being checked, calculated from past statistics over a period of 20 days, ending 2 days earlier)
Hard limits (fixed)
Email-alert
Data monitoring – automated warnings
(M. Dahoui & N. Bormann)
http://www.ecmwf.int/products/forecasts/satellite_check/
Email alert:
Slide 8
ECMWF Training Course - The Global Observing System - 06/2013
Data monitoring – automated warnings
Slide 9
ECMWF Training Course - The Global Observing System - 06/2013
Satellite data monitoringData monitoring – automated warnings
Slide 10
ECMWF Training Course - The Global Observing System - 06/2013
Global Observing System is essential to weather forecasting
Technology driven….a more integrated approach now?
Mass is well observed.
Moisture – satellite observations are data rich but poorly exploited. Radar and lidar will become more important.
Dynamics – even wind observations are scarce.
Composition – NWP techniques have been successfully extended to environmental analysis and prediction but more observations are needed.
Surface – DA for surface fields is being attempted.
Slide 11
ECMWF Training Course - The Global Observing System - 06/2013
User requirements http://www.wmo-sat.info/db/
• Vision for the GOS in 2025 adopted June 2009• GOS user guide WMO-No. 488 (2007)• Manual of the GOS WMO-No. 544 (2003) (Update of satellite section being prepared for ET-SAT Geneva April 2012)
Slide 12
ECMWF Training Course - The Global Observing System - 06/2013
Sun-Synchronous Polar SatellitesInstrument Early morning
orbitMorning orbit Afternoon orbit
High spectral resolution IR sounder
IASI Aqua AIRSNPP CrIS
Microwave T sounder
F16, 17 SSMIS Metop AMSU-AFY3A MWTSDMSP F18 SSMISMeteor-M N1 MTVZA
NOAA-15, 18, 19 AMSU-A Aqua AMSU-AFY3B MWTS, NPP ATMS
Microwave Q sounder + imagers
F16, 17 SSMIS Metop MHSDMSP F18 SSMISFY3A MWHS
NOAA-18, 19 MHSFY3B MWHS, NPP ATMS
Broadband IR sounder
Metop HIRSFY3A IRAS
NOAA-19 HIRSFY3B IRAS
IR Imagers Metop AVHRRMeteor-M N1 MSU-MR
Aqua+Terra MODISNOAA-15, 16, 18, 19 AVHRR
Composition(ozone etc).
NOAA-17 SBUV NOAA-18, 19 SBUVENVISAT GOMOSAURA OMI, MLSENVISAT SCIAMACHYGOSAT
Slide 13
ECMWF Training Course - The Global Observing System - 06/2013
Instrument High inclination (> 60°) Low inclination (<60°)
Radio occultation
GRAS, GRACE-A, COSMIC, TerraSarXC-NOFS, (SAC-C), ROSA
MW Imagers TRMM TMIMeghatropics SAFIRE MADRAS
Radar Altimeter ENVISAT RAJASON Cryosat
Sun-Synchronous Polar Satellites (2)Instrument Early morning
orbitMorning orbit Afternoon orbit
Scatterometer Metop ASCATCoriolis Windsat
Oceansat OSCAT
Radar CloudSat
Lidar Calipso
Visible reflectance
Parasol
L-band imagery
SMOSSAC-D/Aquarius
Non Sun-Synchronous Observations
Slide 14
ECMWF Training Course - The Global Observing System - 06/2013
Product Status
SEVIRI Clear sky radiance Assimilated
SEVIRI All sky radiance Being tested for overcast radiances, and cloud-free radiances in the ASR dataset
SEVIRI total column ozone Monitored
SEVIRI AMVs IR, Vis, WV-cloudy AMVs assimilated
GOES AMVs
MTSAT AMVs
Data sources: Geostationary Satellites