Workshop Meteorological Panel
16 - 18 September 2005
This years annual meeting of the Meteorological Panel took place in Istanbul, was jointly organized by four academic institutions and the Turkish Aeronautic Association and hosted by the Anadolu Bil Professional School of Higher Education. Thirteen representatives from Austria (2), Germany (2), Sweden (2), Switzerland (2), Turkey (4) and USA (1) took part (for a list of institutions and participants see App. A).
|Opening ceremony, Welcome Address|
|Flying in Turkey||Hakan Bakir (TUR)||PDF (4.6 Mbyte)|
|Session 1||Meteorological Support for Gliding|
|PC-Met, Met Service for pilots from DWD||Erland Lorenzen (GER)|
|Met forecast products for glider pilots in Sweden||Bernt Olofson (SWE)||PDF (0.5 Mbyte)|
|High resolution thermal forecast||Esbjörn Olson (SWE)||PDF (0.7 Mbyte)|
|Verification of Toptherm for Sweden Viking Glide||Olivier Liechti (SWI)||PDF (0.6 Mbyte)|
|Merging RAMS and TopTask||Edward Hindman (USA)||PDF (0.1 Mbyte)|
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|Hezarfen Webpage and Met Support||F.Ipek and B.Sirin (TUR)||PDF (3.9 Mbyte)|
|Convection Potential over Europe||Sedef Cakir (TUR)||PDF (3.6 Mbyte)|
|A case study of thunderstorm activity over Turkey||Ceyhan Kahya (TUR)||PDF (0.4 Mbyte)|
|Thermic potential analysis by using flight data||A. Tokgözlu, Z. Aslan (TUR)||PDF (1.1 Mbyte)|
|Workshop: TopTask for competition|
|Meteorological training for airline pilots||Thomas Seiler (GER)||PDF (0.5 Mbyte)|
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- Boundary Layer Information Prediction (BLIP) Maps
- Meteorology of soaring and flapping birds
- Perlan Project
- Exploration of Atmospheric Rotors
|Edward Hindman (USA)|| |
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|Workshop: Update WMO Tech. Note 158|
Bernt Olofson reported on the attempt to use the Swedish HIRLAM model for thermal forecasting. Bernt has been active in forecasting for gliding competitions since 1975 and presently acts as captain for the Swedish Team. Using the experience gained during the June '05 Viking Glide contest in Eskilstuna he explained the characteristics of the model and discussed the empirical formulae for the excess temperature necessary to trigger thermals and the mean rate of climb. His colleague Esbjörn Olsson presented first results coming from a test version of HIRLAM with 5.5km horizontal resolution and 60 vertical layers.
Viking Glide was again in the center of our attention, when Olivier Liechti talked about his TopTherm forecast. To optimize his forecasting tools for the given contest area he had to carefully select appropriate RegTherm regions. Not surprisingly, surface characteristics turned out to be more important than the rather inconspicuous topographical features.Since the availability of data from radio sondes in the area was marginal, TopTherm was initialized with atmospheric profiles calculated by forecasting models using the few and widely spaced sondes - a technique which proved successful and allows the use of TopTherm in regions lacking radio sonde coverage. He also addressed the question of forecast verification. Comparing the flight simulated by TopTask given a certain TopTherm forecast with the GPS data from a flight conducted in the forecast area and period gives a meaningful feedback for quality assessment of the model forecast.
Oliviers TopTask was put in an intercontinental context when Ward Hindman talked about efforts to merge the Regional Atmospheric Modeling System (RAMS) with TopTask to improve prediction and analysis of soaring flights in the USA. Comparing an actual flight trace with satellite images and a RAMS calculated airflow at 850mb he emphasized the surprising agreement in exhibited features. Areas of climb (flight trace) matched very well with calculated vertical air motion (RAMS) which in turn was consistent with the cloud pattern (as observed by satellite). He outlined briefly the concepts behind RAMS, explained the Cotton Soaring Index and continued to explore the potential of integrating RAMS and TopTask.
In the last lecture of this sesson Faruk Ipek introduced the Hezarfen website, the first and only Turkish internet portal to provide meteorological content for aviation. He explained layout, functionality and user interface by taking us on a tour through the site. http://www.hezarfen.meteor.gov.tr/
Ceyshan Kahya presented a statistical study of thunderstorm occurence over Turkey. Instability indices calculated from radiosonde data were used to identify severe events. Data from a 25 year time span histogrammed over 12 months exhibit a bimodal distribution with peaks in May and October, with a spatial development influenced by topographical and thermodynamic features (elevation, sea-land temperature differences,...)
The session was concluded by Zafer Aslan, who described the application of two mathematical tools (Artificial Neural Networks and Wavelet analysis) to the analysis of thermal soaring conditions. Values for static dry energy as an indicator for thermal soaring potential were calculated with the above tools using (inflight) measurements of surface temperature, pressure, humidity and air temperature.
The following Discussion on microlift was triggered by a proposal to the IGC to define a new class of gliders, the socalled microlift gliders. After a lively exchange of ideas, personal views and assessments concerning a scientifically tenable description of microlift, we came to the conclusion that the present state of research on this topic suggests that it is simply the initial state of the thermals we know. As such, microlift would manifest distinct characteristics only at very low altitudes (typically much less than 300m agl). Therefore more in depth studies with well instrumented model gliders are necessary to possibly isolate new features which could identify microlift as a new and 'different' source of lift.
Finally, Ward Hindman reported on a variety of interesting activities in the realm of meteorology of flight:
"The Perlan Project", an ambitious undertaking to take a glider to an altitude of 100 000 ft. using wave lift. The first stage, attempting to use a conventional glider for a climb to 60 000ft, is presently under way, its main proponent Steve Fossett waiting for favorable weather in the Andes region of southern Argentina. [Dr. Elizabeth Austin] www.perlanproject.com
"BLIP Maps", an US website providing comprehensive soaring specific data, plots and forecasting maps. Its goal is to promote cross country flying and to create a stronger interest for meteorology in the soaring community. www.drjack.info
"Meteorology of soaring and flapping birds" describes the 'flight following' of a peregrine falcon on his amazing trip across the Gulf of Mexico. The bird covered the enormous distance over water apparently using most favorable weather conditions, tailwinds and frontal lift along a stationary front. [Young and McGrady, firstname.lastname@example.org]
"Exploration of Atmospheric Rotors" , a new investigation of waves and rotors in the lee of the Sierra Nevada, the location of the classic "Sierra Wave Project" of the early fifties. It uses modern measuring equipment, ground based and airborne, in conjunction with state of the art numerical modeling to study the structure and dynamics of the rotor coupled system. Phase I was conducted in 2004 using ground based instruments only, Phase II (gorund and airborne) is scheduled for the spring of 2006. http://www.ofps.ucar.edu/trex/
In "TopTask for competition" Olivier was kind enough to set up TopTask on several PC's and laptops so that everybody interested could get a hands-on impression of its potential as flight planning and verification tool.
"Update Technical Note 158" was devoted to discuss the rejuvenation of the venerable "Handbook of Meteorological Forecasting for Soaring Flight". Revision of TN158 or a new Technical Note was the question. Olivier proposed a new table of contents, which was used to define the work necessary for a revised edition. In the end five participants put up their hands to volunteer their time to implement the modifications in a new edition of TN158.
To allow for sufficient lead time, a decision should probably be taken in the spring of 2006.
While recieving his commemorative gift during a short ceremony at the banquet, Markus Stracke summed up our impressions convincingly: " Istanbul - wonderful !"
List of Institutions:
Anadolu Bil Professional School of Higher Education
Istanbul Commerce University
Istanbul Technical University
Suleyman Demirel University
Turkish Aeronautic Association
List of Participants:
Zafer Aslan, Wolf-Dietrich Herold, Edward Hindman, Faruk Ipek, Olivier Liechti, Erland Lorenzen, Bernt Olofson, Esbjörn Olson, Ahmet Tokgözlü, Thomas Seiler, Bülent Sirin, Markus Stracke, Hermann Trimmel, Hakan Bakir, Sedef Cakir, Mikdat Kadioglu, Ceyhan Kahya, Lütfiye Kusak, Sibel Mentes, Ahmet Öztopol, Ahmet Duran Sahin, Sema Topcu, Hüseyin Toros, Adil Yükselen