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Einar K. Enevoldson (The Perlan Project) |
Jun. 18, 2009 |
The Perlan Project and the Future of High Altitude Soaring
(58 minutes, click title to view in Real Player or VLC)
After an introduction by Joachim Kuettner, Enevoldson describes the flight he and Steve Fossett took to 51,500 feet above the Andes to establish the feasibility of soaring to 100,000 feet in a specialized sailplane. The sailplane successfully climbed through the tropopause and 17,000 feet into the stratosphere. A new pressurized sailplane capable of soaring to 90,000 feet is now under construction. It will have characteristics that may make it an attractive research platform.
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Howie Bluestein (NCAR, EOL, University of Oklahoma) |
Jun. 15, 2009 |
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F. Martin Ralph (NOAA) |
May. 20, 2009 |
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NCAR & UCAR News Center |
May. 04, 2009 |
World's Largest Tornado Experiment - Multimedia Gallery
(illustrations and videos)
The largest and most ambitious tornado study in history began May 10, 2009, as dozens of scientists deployed radars and other ground-based instruments across the Great Plains to gain a better understanding of these often deadly weather events.
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Kate White (US Army Corps of Engineers, CRREL) |
Apr. 13, 2009 |
River Ice Processes
(Free login required, 60 minutes)
White explores basic river ice processes, including the formation, growth, breakup, and transport of river ice and how it can become jammed, triggering floods. She also covers current ice jam forecasting as well as ice modeling research and development being conducted by the U.S. Army Corps of Engineers.
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Matt Kelsch (UCAR, UOP, COMET) |
Apr. 10, 2009 |
Snow Melt Processes
(Free login required, 60 minutes)
This module helps students develop an understanding of the role of snowmelt in the hydrologic forecasting process. Students will learn about the development and evolution of snowpack, the processes leading up to and during melting, and the fate of melt water from snow.
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Erland Kallen (Stockholm University) |
Dec. 19, 2008 |
The Need for Wind Profile Measurements from Space: Assimilation of Wind Data from the ADM/Aeolus Mission
(47 minutes)
The Atmospheric Dynamics Mission (Aeolus) will provide line-of-sight wind profiles using a Doppler lidar measurement technique. Wind observations are particularly needed in tropical regions and in the midlatitudes. The latter area has implications for our understanding of the processes that govern Arctic warming and the retreat of Arctic sea ice. Additional objectives are aerosol information and cloud properties.
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Harmen Jonker (Delft University of Technology) |
Dec. 03, 2008 |
Towards a Theory on the Formation of Mesoscale Fluctuations by Boundary Layer Convection
(58 minutes)
By means of large-eddy simulations of clear and cloudy boundary layers, buoyancy-driven convection is capable of autonomously creating spatial fluctuations with a lateral size far exceeding the boundary layer depth. Analysis yields insight into those processes that favor and those that inhibit the formation of large-scale fluctuations. The results can be generalized to high Reynolds (Rayleigh) number flows relevant for the atmosphere.
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Randolph "Stick" Ware (NCAR, ESSL, MMM, Radiometrics Corporation) |
Sep. 28, 2008 |
Continuous Temperature, Humidity, and Liquid Profiling
(50 minutes)
WeatherCam, a passive microwave sensor, monitors the tropospheric air temperature, humidity, and liquid structure that defines local weather. These data can improve convection, precipitation, lightning, fog, icing, turbulence, and dispersion nowcasting and forecasting. Ware presents data from the May 2008 Windsor tornado and live displays from emerging international networks.
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NCAR & UCAR News Center |
Apr. 30, 2008 |
Weather Modification - Multimedia Gallery
(illustrations and videos)
Commercial operators, governments, and academic researchers worldwide are engaging in cloud seeding and other weather modification projects to try to influence local conditions. NCAR scientists and their colleagues are investigating efforts to build up wintertime snowpack in the western United States and bring more rain to drought-stricken regions around the world.
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William H. Hooke (American Meteorological Society) |
Oct. 09, 2007 |
The 21st Century Outlook for Disasters - and How We Will Cope
(52 minutes)
Social trends, such as increased human population, rising per capita consumption of natural resources, and an accelerating pace of societal and technological advance appear to be on a collision course with our planet's workings. This has implications for both (1) the future of disasters themselves, and (2) the coping strategies available to us.
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Vanda Grubisic (Desert Research Institute) |
Oct. 03, 2007 |
T-REX: Terrain-induced Rotor Experiment, March-April 2006
(51 minutes)
Grubisic decribes the methodology and results from the second phase of a coordinated effort to explore the structure and evolution of atmospheric rotors (intense low-level horizontal vortices that form along an axis parallel to, and downstream of, a mountain ridge crest) as well as associated phenomena in complex terrain. Results show that a second mountain range promotes wave trapping and nonlinear wave resonance at large distances. Future study will focus on the effects of upstream atmospheric structure. About T-REX.
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Mohan Ramamurthy (Unidata) |
Mar. 02, 2007 |
Linked Environments for Atmospheric Discovery (LEAD)
(52 minutes)
LEAD makes meteorological data, forecast models, and analysis and visualization tools available to anyone who wants to interactively explore the weather as it evolves. A multi-disciplinary effort involving 9 institutions, LEAD is addressing the fundamental research challenges, and associated development, needed to create an integrated, scalable framework for working with a broad array of meteorological data and model output.
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NCAR & UCAR News Center |
Dec. 11, 2006 |
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Don Lenschow (MMM) |
Jan. 17, 2006 |
Stratus Off the West Coast? Does Anyone Care?
(54 minutes)
Two experiments are described, the Second Dynamics and Chemistry of Marine Stratocumulus program (DYCOMS II) and the East Pacific Investigation of Climate Processes in the Coupled Ocean-Atmosphere System (EPIC 2001). Both address how the stratocumulus regime (predominantly off the west coasts of North and South America and Africa) affects the variability of solar radiation.
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Vanda Grubisic (Desert Research Institute) |
Apr. 24, 2005 |
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Jorgen Jensen (EOL) |
Mar. 24, 2005 |
The Impact of Giant Aerosols on Warm Rain Formation
(56 minutes)
This talk focuses on the warm rain formation of giant sea salt aerosol particles. A cloud process model is used to examine the relative impact of small and giant aerosols on warm rain formation in both stratocumulus and cumulus.
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Jeffrey Stith (EOL) |
Feb. 22, 2005 |
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Roger Wakimoto (EOL) |
Feb. 16, 2005 |
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Howard Bluestein (University of Oklahoma) |
Nov. 17, 2004 |
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David Ahijevych (MMM) |
Jul. 01, 2004 |
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