Department  WM/SD

Waarom Satelliet Windmetingen?
Mooi plaatje, en nog meer ....

Winds from satellites
Instruments
Projects
Collegues involved
International collaboration and representation
Publications

 
 

Waarom Satelliet Windmetingen?

Significant weer komt van de oceaan

De weeranalyses op de oceaan zijn soms slecht want daar zijn weinig waarnemingen

Extreme stormen of storingen worden dan slecht voorspeld (kerststormen '99, paasverwachting '99)

Windmetingen zijn het meest effectief om de weeranalyses te verbeteren
 

Lidar Vertikale Windprofielen

ESA Atmospheric Dynamics Mission (geplande lancering in 2006 )

(c) ESA

Eerder ADM werk op het KNMI                                      Earlier ADM work at KNMI

 
Scatterometer Windmetingen

ERS AMI scatterometer (rode pijlen) in de buurt van Jan Mayen;
dat ligt tussen IJsland en Groenland.

Of hier de actuele plaatjes in de tabel met uitvergrotingen.

• Grote ruimtelijke bedekking
• Ruimtelijk gedetailleerde informatie

NASA/NOAA SeaWinds scatterometer presentatie (twee maal daags in te nemen!)

SeaWinds werk op het KNMI

 

Winds from Satellites

One of the key limiting factors in forecasting the weather in Europe is the sparse availability of meteorological observations over the oceans, since European weather often originates from over these areas. As a consequence, the three-dimensional flow is poorly analysed and extreme events, such as storms, are poorly forecasts. Moreover, atmospheric flow analysis is pretty bad in the tropics. In particular wind observations are effective in improving the analyses of the atmospheric flow. Satellite wind observations, by their uniform coverage, provide a solution. At the same time they provide a challenge, since complex active instrumentation is needed to obtain such measurements. My challenge, therefore, is to make such data useful for meteorological practise, both in weather forecasting and climate analyses.

Winds at the ocean surface are obtained by scatterometers. You can find out a lot about  scatterometers from my thesis. KNMI participates in the Eumetsat Ocean and sea Ice Satellite Application Facility (SAF) and the Numerical Weather Prediction SAF to improve the interpretation, use, and monitoring of scatterometer data. Here you find some real-time sea-surface winds from SeaWinds.

We really need three-dimensional wind information however. The ESA Earth Explorer Core Atmospheric Dynamics Mission has recently been approved for flight providing the first Doppler Wind Lidar data from space in 2007, as planned. I am happy to have contributed to this decision. Now make sure we make the best of it!

Water vapour is the next thing to observe better in the atmosphere to analyse atmospheric state. TheESA Earth Explorer Core WALES Mission was proposed by me in colloboration with DLR to fil this gap.

Ozone data assimilation in atmospheric circulation models provides an interesting link between atmospheric chemistry and dynamics. Look at the EU SODA project.
 
 

Instruments

• ESA Atmospheric Dynamics Mission (Aeolus)
• NASA SeaWinds
• ESA AMI Scatterometer
• ASCAT op METOP
• Synthetic Aperture Radar
• water vapour DIAL
• Ozone instruments
• Rotating fan beam scatterometer

Projects

• Numerical Weather Prediction Satellite Application Facility (Eumetsat)
• Ocean and Sea Ice Satellite Application Facility (Eumetsat)
• SeaWinds fellowship (Eumetsat)
• Diverse ESA projects, ADM OSSE, LIPAS, GPSR, .....
• Satellite Ozone Data Assimilation ( EU SODA until 1/1/'00)
• LITE_4ADM (SRON)
• Rotating Fanbeam Scatterometer concept study (ESA)
• DIAL water vapour feasibility study (ESA)

Collegues at KNMI

Tilly Driesenaar             OSI SAF implementation
Siebren de Haan            OSI SAF ice screening, CMOD5, and ambiguity removal
Gert-Jan Marseille        ADM-Aeolus and LITE
Marcos Portabella          QuikSCAT fellow
John de Vries                 NWP SAF
Jos de Kloe                     Rotating Fan-Beam Scatterometer concept study
Milco Landtman            DIAL water vapour study
 
 

International collaboration and representations

• Francis Gohin, Yves Quilfen and Jean-Francois Piolle at IFREMER
• ADM-Aeolus Mission Advisory Group
• ESA/EUMETSSAT ASCAT Science Advisory Group
• NASA NSCAT and QuikSCAT Science teams
• NWP SAF: UKMO, ECMWF, Meteo France
• OSI SAF: Meteo France, IFEMER, DNMI, SMHI, DMI
• HIRLAM satellite activity co-ordinator
• ESA radar technology Advisory Group
• BCRS ROWA & WiWeT

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Publications

List

Selection:

• How tropical cyclones are much better predicted with ERS scatterometer winds
• My thesis on Scatterometry
• A project report on the characterisation and assimilation of QuikScat winds?
• Educational on scatterometer data interpretation and assimilation

(ECMWF seminar '00 talk)

• Basic need for wind profiles
• ADM-Aeolus Error Correlation Study MERCI
• ADM-Aeolus wind-profiling capabilities (OSSE description)
• or a concept OSSE report with more detail (> 2 Mbyte)

• Atmospheric boundary layer humidity and wind structures from SAR interferometry

(All publication entries are in Adobe Acrobat PDF:)

Ad.Stoffelen@knmi.nl