218 items found, displaying 21 to 40.[First/Prev] 1, 2, 3, 4, 5, 6, 7, 8 [Next/Last]
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Steven Tomczyk (NCAR, ESSL, HAO) |
Mar. 18, 2009 |
Waves in the Solar Corona
(48 minutes)
One problem in solar physics is how the solar corona is heated to a temperature of 1 million degrees Kelvin while the photosphere below it is at only 5,000 K. Heating by waves is one possibility. Tomczyk discusses recent measurements of waves in the solar corona, their analysis, and the implications for coronal heating. He also talks about the use of waves as diagnostics of the solar coronal plasma.
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Roger A. Pielke Jr. (University of Colorado) |
Feb. 18, 2009 |
Some Uncomfortable Knowledge about Climate Change
(67 minutes)
Pielke discusses the politicization of climate science, which brings with it the pathologies of politics. Political "culture wars" are being waged through science. A few scientists have begun to speak out on this situation, but more leadership is required.
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NCAR & UCAR News Center |
Jan. 29, 2009 |
HIAPER Pole to Pole Observations (HIPPO) - Multimedia Gallery
(teleconference, videos, photos)
HIPPO is a three-year field project to make the most extensive airborne sampling of carbon dioxide and other greenhouse gases in the atmosphere to date, from the Arctic to the Antarctic. Study results will help scientists understand the behavior of these gases in the atmosphere and lead to improved predictions about climate change.
| News Release
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Laura Pan(NCAR, ACD) |
Jan. 21, 2009 |
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Travis Metcalfe (NCAR, HAO) |
Jan. 13, 2009 |
Sounding the Stars with Genetic Algorithms - Google Tech Talk
(60 minutes, YouTube)
NASA's Kepler mission will search for habitable Earth-like planets around distant Sun-like stars. Basing his work on genetic algorithms, Metcalfe has developed an automated approach to matching computer models of stars to Kepler's observations in order to characterize these stars.
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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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Steven S. Brown (NOAA) |
Nov. 19, 2008 |
Atmospheric Chemistry after Dark
(47 minutes)
Brown, a scientist in NOAA's Earth System Research Laboratory, explores new findings on several aspects of nighttime chemical transformations that are relevant in the troposphere.
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Jack Fellows (UCAR, UOP), Nancy Colleton (Alliance for Earth Observations), Bob Gagosian (Consortium for Ocean Leadership), Keith Seitter (American Meteorological Society), Veronica Johnson (WRC TV), |
Oct. 23, 2008 |
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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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Tom Wigley (NCAR), Jae Edmonds (Pacific Northwest National Laboratory, University of Maryland) |
Jul. 08, 2008 |
The Energy Challenge of Climate Change: More Urgent Than We Thought
(32 minutes)
In this congressional briefing Wigley notes that the amount of carbon-free energy required to stabilize CO2 concentrations has been built into no-climate-policy scenarios. These assumed changes may be unrealistic in the face of rapid development in Asia. According to Edmonds, stabilizing CO2 concentrations at 550 ppm will require new science and technology to reduce the cost of such an effort.
| GTSP Report
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Eugene Cordero (San Jose State University) |
Jun. 27, 2008 |
The Global Warming Diet: Food Climate Connections
(60 minutes, ReadyTalk)
For this inaugural talk in Sustainable UCAR's Topics in Sustainability series, Cordero focuses on food, how it is grown, where it comes from, and how changing one's diet can reduce carbon emissions as effectively as buying a new fuel-efficient car. Sustainable UCAR is the resource for best practices in sustainability at NCAR & UCAR, coordinating efforts that support a healthy environment, social equity, and enhanced organizational productivity.
| Abstract
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Kelvin Droegemeier (University of Oklahoma) |
Jun. 16, 2008 |
What is science in the future going to look like?
(46 minutes)
Droegemeier talks to SOARS participants about the future of the atmospheric sciences. He points to growing opportunities in private industry and urges students to take courses and gain experience in communications, computer science, and business.
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David A. Randall (Colorado State University) |
May. 21, 2008 |
The Role of Moisture in the Madden-Julian Oscillation
(65 minutes)
Randall's group has been using a superparameterized version of the
Community Atmosphere Model (CAM) to study the Madden-Julian Oscillation. Comparing results to both observations and results from the conventional CAM, he presents an analysis of the processes that give rise to the MJO in the Super-CAM model.
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NCAR & UCAR News Center |
May. 19, 2008 |
Bluefire Supercomputer - Multimedia Gallery
(videos and illustrations)
NCAR has taken delivery of a new IBM supercomputer that will advance research into severe weather and the future of Earth's climate. The supercomputer, a Power 575 Hydro-Cluster, is the first in a highly energy-efficient class of machines to be shipped anywhere in the world.
| News Release
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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.
| Media Advisory
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NCAR MOPITT team |
Apr. 30, 2008 |
MOPITT Instrument - Multimedia Gallery
(illustrations and videos)
MOPITT (Measurements of Pollution in the Troposphere) is an instrument flying on NASA's EOS Terra spacecraft. NCAR scientists and their international colleagues developed and run MOPITT to measure the global distributions of carbon monoxide (CO) and methane (CH4) in the troposphere. CO also serves as a tracer for other kinds of air pollution.
| News Release
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Casey Thornbrugh (University of Arizona and Tohono O'odham Community College) |
Apr. 25, 2008 |
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Bret Harper (Black and Veatch) |
Apr. 25, 2008 |
Planning for Seven Generations: The Perspective of the Next Generation - Bret Harper
(32 minutes)
Talk 2 of 8 on Day 2 of the Planning for Seven Generations Conference. Harper, a former SOARS protégé, describes his research into ENSO's influence on the production of wind energy. He also discusses the state of the West Coast salmon fishery and his participation in a California tribal ecological knowledge program. The program's goal is restoration of tribal lands and of the tribe itself.
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Sherri Heck (University of Colorado) |
Apr. 25, 2008 |
Planning for Seven Generations: The Perspective of the Next Generation - Sherri Heck
(17 minutes)
Talk 3 of 8 on Day 2 of the Planning for Seven Generations Conference. A gap in CO2 measurements in the southwestern U.S. and the possibility of educational collaboration motivated a study designed to measure CO2 fluxes. Heck reviews the hurdles she needed to overcome in setting up the project and the lessons she learned in the process.
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