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The Mountain Wave Project (MWP) pursues global scientific research of gravity waves and associated turbulence. MWP seeks to develop new scientific insights and knowledge through high altitude and record seeking glider flights with the goal of increasing overall flight safety and improving pilot training.
Wind movement over terrain and ground obstacles can create wavelike wind formations which can reach up to the stratosphere. In 1998 the pilots René Heise and Klaus Ohlmann founded the MWP, a project for global classification, research, and analysis of orographically created wind structures (e.g. Chinook, Foehn, Mistral, Zonda). The MWP is an independent non-profit-project of the Scientific and Meteorological Section of the Organisation Scientifique et Technique du Vol à Voile (OSTIV) and is supported by the Fédération Aéronautique Internationale (FAI). [1] [2]
The MWP was originally focused on achieving better understanding. of the complex thermal and dynamic air movements in the atmosphere, and using that knowledge to achieve ever greater long distance soaring flights. As MWP gained greater awareness of the power inherent to mountain wave-like structures in the atmosphere, and their strong vertical airflows, it became obvious that they presented great dangers to civil aviation in multiple ways. [3] [4] Therefore, the focus of the MWP shifted to a more scientific approach to the airflow phenomena, with the goal of discovering new ways to increase overall aviation safety. Through the support of other scientists and cooperation partners the core group became more powerful and gained greater depth of knowledge. The integration of Joerg Hacker from the Airborne Research Australia (ARA) into the core group significantly enhanced the overall depth of knowledge of the group.
In order to learn more about the relevant physical process in the atmosphere, the MWP Team launched two expeditions in the Argentinean Andes in 1999 and 2006. For high altitude flights a modified Stemme S10 VT motorglider was used as a platform for airborne data acquisition and measurement. The pilots were assisted with life support equipment and physiological preparations by the renowned flight physicians of the German Aerospace Center (DLR) and by astronaut Ulf Merbold. [5]
Thanks to the help of qualified scientists and state-of-the-art sensor technology, the MWP achieved its goal to gather and analyze wave structure data with impressive results at the operation in Mendoza in October 2006. Research flights and operations were completed in the region between the Tupungato (5.700 m) and Aconcagua (6.900m), which is very well known for its extremely treacherous turbulence. [6]
Between 2000 and 2004 MWP team member Klaus Ohlmann further developed and expanded on the knowledge about wave systems gained in the Andes in 1999, and accumulated a wealth of experience. This educational process allowed him to win the OSTIV Kuettner Prize for the first 2000 km straight out wave flight, as well as completing the world's longest recorded soaring flight of 3,008 km. He was supported by his MWP teammates in Germany using internet communications to provide specific weather predictions using a new weather forecasting tool. In these flights, he provided crucial in-flight data, which in turn helped to improve subsequent weather predictions by the team in Germany.
Two MWP members participated in the 2006 field research campaign of the Terrain Induced Rotor Experiment (T-REX) which took place in the Sierra Nevada (U.S.A.). René Heise served as scientific reviewer for the National Science Foundation and contributed MWP wave forecasts to the data archive. [7] Wolf-Dietrich Herold documented activities in Boulder/CO and Bishop/CA and produced a TV-report of the project for the German TV station RBB.
In meteorology, wind speed, or wind flow speed, is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature. Wind speed is now commonly measured with an anemometer.
A meteorologist is a scientist who studies and works in the field of meteorology aiming to understand or predict Earth's atmospheric phenomena including the weather. Those who study meteorological phenomena are meteorologists in research, while those using mathematical models and knowledge to prepare daily weather forecasts are called weather forecasters or operational meteorologists.
A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather and climate. The measurements taken include temperature, atmospheric pressure, humidity, wind speed, wind direction, and precipitation amounts. Wind measurements are taken with as few other obstructions as possible, while temperature and humidity measurements are kept free from direct solar radiation, or insolation. Manual observations are taken at least once daily, while automated measurements are taken at least once an hour. Weather conditions out at sea are taken by ships and buoys, which measure slightly different meteorological quantities such as sea surface temperature (SST), wave height, and wave period. Drifting weather buoys outnumber their moored versions by a significant amount.
Wind shear, sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with a change in altitude. Horizontal wind shear is a change in wind speed with a change in lateral position for a given altitude.
In meteorology, lee waves are atmospheric stationary waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the Giant Mountains. They are periodic changes of atmospheric pressure, temperature and orthometric height in a current of air caused by vertical displacement, for example orographic lift when the wind blows over a mountain or mountain range. They can also be caused by the surface wind blowing over an escarpment or plateau, or even by upper winds deflected over a thermal updraft or cloud street.
Lenticular clouds are stationary clouds that form mostly in the troposphere, typically in parallel alignment to the wind direction. They are often comparable in appearance to a lens or saucer. Nacreous clouds that form in the lower stratosphere sometimes have lenticular shapes.
A weather ship, or ocean station vessel, was a ship stationed in the ocean for surface and upper air meteorological observations for use in weather forecasting. They were primarily located in the north Atlantic and north Pacific oceans, reporting via radio. The vessels aided in search and rescue operations, supported transatlantic flights, acted as research platforms for oceanographers, monitored marine pollution, and aided weather forecasting by weather forecasters and in computerized atmospheric models. Research vessels remain heavily used in oceanography, including physical oceanography and the integration of meteorological and climatological data in Earth system science.
Perlan Project Inc. is a 501(c)(3) not-for-profit aeronautical exploration and atmospheric science research organization that utilizes sailplanes (gliders) designed to fly at extremely high altitudes.
In meteorology, clear-air turbulence (CAT) is the turbulent movement of air masses in the absence of any visual clues, such as clouds, and is caused when bodies of air moving at widely different speeds meet.
An AIRMET, or Airmen's Meteorological Information, is a concise description of weather phenomena that are occurring or may occur (forecast) along an air route that may affect aircraft safety. Compared to SIGMETs, AIRMETs cover less severe weather: moderate turbulence and icing, sustained surface winds of 30 knots or more, or widespread restricted visibility.
TAMDAR is a weather monitoring system that consists of an in situ atmospheric sensor mounted on commercial aircraft for data gathering. It collects information similar to that collected by radiosondes carried aloft by weather balloons. It was developed by AirDat LLC, which was acquired by Panasonic Avionics Corporation in April 2013 and was operated until October 2018 under the name Panasonic Weather Solutions. It is now owned by FLYHT Aerospace Solutions Ltd.
The following outline is provided as an overview of and topical guide to the field of Meteorology.
Klaus Ohlmann is a German glider pilot who has established 36 world records approved by FAI. Among these is the record for a free distance flight with up to 3 turn-points by flying 3,009 km from Chapelco Airport at San Martín de los Andes (Argentina) in a Schempp-Hirth Nimbus 4 DM on 21 January 2003 with his co-pilot Karl Rabeder. On 9 January 2003 at El Calafate in Argentina he made a flight of 2,247.6 km in a Schempp-Hirth Nimbus 4 DM. This set a new world free distance record, breaking the record set over 30 years earlier by Hans-Werner Grosse.
The Stemme S10 is a self-launching sailplane produced by Stemme AG in Strausberg (Germany) since the 1980s. The engine is mounted amidships and it features an unusual folding propeller which is stowed inside the aircraft's nose-cone when the engine is not in use.
Gliding is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne. The word soaring is also used for the sport.
A prognostic chart is a map displaying the likely weather forecast for a future time. Such charts generated by atmospheric models as output from numerical weather prediction and contain a variety of information such as temperature, wind, precipitation and weather fronts. They can also indicate derived atmospheric fields such as vorticity, stability indices, or frontogenesis. Forecast errors need to be taken into account and can be determined either via absolute error, or by considering persistence and absolute error combined.
Joachim Kuettner, also spelled Küttner, was a German-American atmospheric scientist.
Numerous accidents have occurred in the vicinity of thunderstorms due to the density of clouds. It is often said that the turbulence can be extreme enough inside a cumulonimbus to tear an aircraft into pieces, and even strong enough to hold a skydiver. However, this kind of accident is relatively rare. Moreover, the turbulence under a thunderstorm can be non-existent and is usually no more than moderate. Most thunderstorm-related crashes occur due to a stall close to the ground when the pilot gets caught by surprise by a thunderstorm-induced wind shift. Moreover, aircraft damage caused by thunderstorms is rarely in the form of structural failure due to turbulence but is typically less severe and the consequence of secondary effects of thunderstorms.
William Christopher Swinbank was a British-born meteorological physicist who worked at the UK Meteorological Office, the CSIRO Australia and the NCAR Colorado. His main areas of research were fog prediction, upper atmosphere analysis, wind predictions, hail storms and turbulent fluxes.
