WindMap UpdateWindMap Update · B. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap...
Transcript of WindMap UpdateWindMap Update · B. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap...
WindMap UpdateWindMap UpdateIdentification of slope wind areasIdentification of slope wind areas
using topografic modelsusing topografic models
Update given at OSTIV Conference,Update given at OSTIV Conference,World Gliding Championship at LüsseWorld Gliding Championship at Lüsse
Berlin, August 2008Berlin, August 2008
Beda SigristBeda Sigrist
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 2
Conclusions of previousConclusions of previous OSTIVOSTIV--ConferenceConferenceStSt--Auban/FR,Auban/FR, 29.09.0729.09.07
TherMapTherMap considered reasonably matureconsidered reasonably mature(“Don’t spoil it!”)(“Don’t spoil it!”)
Increasing number ofIncreasing number of record flightsrecord flights using slopeusing slopewinds not foreseeable by convection modelswinds not foreseeable by convection models(Klaus Ohlmann etc.)(Klaus Ohlmann etc.)
Need for moreNeed for more precise slope wind modelsprecise slope wind models
Proposal of O. Liechti et H.Trimmel toProposal of O. Liechti et H.Trimmel to trytrygenerating slope wind mapsgenerating slope wind maps(“like TherMap”)(“like TherMap”)
Beginning of theWindMap developments
Beginning of theWindMap developments
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 3
ContentsContents
Topographic modelTopographic model
The basic WindMap approachThe basic WindMap approach Wind deviationWind deviation
Lee zonesLee zones
Channelling effectsChannelling effects
Some samplesSome samples
Options to go furtherOptions to go further
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 4
AA topographic modeltopographic model is a digitized land surfaceis a digitized land surface
TherMap/WindMap
SRTM ModelRaster ~90 m
TherMap/WindMap
SRTM ModelRaster ~90 m
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 5
For an independent surface field theFor an independent surface field the upwind componentupwind componentof the deviated wind can be computedof the deviated wind can be computed
Wind deviatingsurface flied
Guiding plane
Wind directionafter deviation
Normal vector ofsurface field
Original wind direction
Upwindcomponentafterdeviation
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 6
Lee wind areasLee wind areas
Wind direction
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B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 7
Sample map showing slope wind potentialSample map showing slope wind potentialSimple model (210 degrees)Simple model (210 degrees)
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 8
Acceleratedair flow
Wind channellingWind channelling
Without channelling
With channelling
WindMap considers local channelling ofwind (up to 400m)
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 9
Same sample map with channelling effectSame sample map with channelling effectThe map becomes more pronounced (Wind 210 Grad)The map becomes more pronounced (Wind 210 Grad)
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 10
ValidationsValidations using actual flight recordsusing actual flight recordsExample Stefan Leutenegger 13.5.07Example Stefan Leutenegger 13.5.07
EastEast--West flight north of Innsbruck InnsbruckWest flight north of Innsbruck Innsbruck
Innsbruck
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 11
Same Situation in 3DSame Situation in 3D(by overlaying WindMap to SeeYou)(by overlaying WindMap to SeeYou)
Innsbruck
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 12
Example of a flight of April 07Example of a flight of April 07Diablerets/CH, Wind from 180 degDiablerets/CH, Wind from 180 deg
Diablérèts
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 13
PublicationsPublications
The Basic WindMapThe Basic WindMap--Maps are available for downloadMaps are available for downloadon the Internet, or can be ordered on aon the Internet, or can be ordered on a CD.CD.
Areas covered:Areas covered: Alps of Austria, Switzerland and France,Alps of Austria, Switzerland and France,North and Center of Appennine/IT, PyreneesNorth and Center of Appennine/IT, Pyrenees
24 maps per region with wind directions incremented by 15 degrees
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 14
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Options to go furtherOptions to go further
TherMap/WindMap Actual weather situation
So far DELIBERATE separation from daily weather situation(too complex, variable, & difficult to select, represent and interpret)
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 15
One possibility: Daily (hourly) wind situationOne possibility: Daily (hourly) wind situation
Digitized wind data useable to generateactual WindMap maps ?
Digitized wind data useable to generateDigitized wind data useable to generateactual WindMap maps ?actual WindMap maps ?
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 16
Test made withTest made withtwo different wind data setstwo different wind data sets
1.1. FromFrom Austria ControlAustria Control::
raster 0.25 degrees (~20 km)raster 0.25 degrees (~20 km)
vertical 925, 850, 700 hPavertical 925, 850, 700 hPa
2.2. FromFrom MeteoblueMeteoblue (Uni Basle):(Uni Basle):
raster ~5 km, then smoothed to 1 kmraster ~5 km, then smoothed to 1 km
vertical 950, 900, 850,…, to 650 hPavertical 950, 900, 850,…, to 650 hPa
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 17
Example with data from AT Control:Example with data from AT Control:Flight H.Pirker, 23.07.07 at 15h UTCFlight H.Pirker, 23.07.07 at 15h UTC
Easy to identify the “hot areas” at a large map scale
Next slide
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 18
• This level of resolution hardly provides better local insights than thesame analysis using fixed average wind direction
• Raster too large for showing wind channelling in valleys
Example with data from AT Control:Example with data from AT Control:Extract of flight H.Pirker, 23.07.07 at 15h UTCExtract of flight H.Pirker, 23.07.07 at 15h UTC
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 19
Example with data from Meteoblue:Example with data from Meteoblue:20.07.08 at 12h UTC20.07.08 at 12h UTC
Original wind data at800 hPa with ~5kmraster
The same mapsmoothed downto 1 km raster
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 20
Example with data from Meteoblue:Example with data from Meteoblue:20.07.08 at 12h UTC20.07.08 at 12h UTC
Next slide
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 21
Example with data from Meteoblue:Example with data from Meteoblue:Extract of 20.07.08 at 12h UTCExtract of 20.07.08 at 12h UTC
• Maps reflectreal situationexperiencedduring flight
• Some valleychannellingeffectsare visible
• Some strongwaves foundduring flight(not includedin presentmodel)
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 22
ConclusionsConclusions
20km wind raster20km wind raster:: Allows already large scale identification ofAllows already large scale identification of
potential slope wind areaspotential slope wind areas
But for local interpretation the resultingBut for local interpretation the resultingWindMaps add little value againstWindMaps add little value againstpredetermined WindMapspredetermined WindMaps
Smoothed 5 kmSmoothed 5 km wind rasterwind raster Provides also better understanding of localProvides also better understanding of local
situationssituations
Has the potential to be further refined *):Has the potential to be further refined *): Local confluence effectsLocal confluence effects
More accurate identification of maskedMore accurate identification of masked(Ohlmann) areas(Ohlmann) areas
Should also show possible occurrence ofShould also show possible occurrence ofwaveswaves
*) 2 km raster being negotiated in CH*) 2 km raster being negotiated in CH
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 23
Key Questions ?Key Questions ?
How significant is theHow significant is thepotential user communitypotential user community forfordaily/hourly WindMap results ?daily/hourly WindMap results ?
Proposal e.g. one map/countryProposal e.g. one map/countryand day, for 12h UTCand day, for 12h UTC
If ok, is there anIf ok, is there an InternetInternethosthost providerprovider interested ininterested inupdating and publishingupdating and publishingdaily/hourly WindMap results ?daily/hourly WindMap results ?
B. SigristB. Sigrist -- WindMap Update, Aug. 2008, OSTIV Conference,WindMap Update, Aug. 2008, OSTIV Conference,Lüsse/ BerlinLüsse/ Berlin 24
Thank You !Thank You !