218 items found, displaying 61 to 80.[First/Prev] 1, 2, 3, 4, 5, 6, 7, 8 [Next/Last]
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Andrew Light (University of Washington) |
Apr. 04, 2008 |
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NCAR & UCAR News Center |
Feb. 07, 2008 |
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Tom Bogdan (NOAA Space Weather Prediction Center) |
Jan. 16, 2008 |
Space Weather: New Prospects for a Technology-Based Global Economy
(50 minutes)
Space weather traces its origins to the Sun's dynamic variability. It is driven by the combined actions of rotation, turbulent convection, and magnetic fields. Solar weather follows a quasi-11-year cycle and can be correlated with auroral activity. Bogdan lists three varieties of solar weather that are analogous to Earth's tornadoes, hurricanes, and wind. Solar weather can be forecast using the same kinds of tools that meteorologists use and is important to a growing client base. Our rapidly evolving high-tech global economy has become increasingly vulnerable to the effects of space weather on the health of airline workers, air transportation, satellite communications, warfare, fossil fuel extraction, power generation, human exploration, and commercial utilization of space.
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Sasha Madronich (ACD) |
Nov. 12, 2007 |
Atmospheric Pollution from Megacities
(55 minutes)
Air pollution from megacities not only affects local air quality, but spills over into surrounding regions, possibly to the entire globe. There are consequences for human health, cultivated and natural ecosystems, visibility, atmospheric energy budgets, weather modification, and climate. He points out areas of uncertainty where further research is needed. Recent studies show that dilution is not a solution.
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NCAR & UCAR News Center |
Oct. 23, 2007 |
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Tim Killeen (NCAR), Richard Anthes (UCAR) |
Oct. 18, 2007 |
NCAR Celebrates the 2007 Nobel Prize for Peace
(12 minutes)
The director of NCAR and president of UCAR celebrate award of the 2007 Nobel Prize for Peace to the Intergovernmental Panel on Climate Change and Albert Gore. Forty NCAR authors participated in the 2007 IPCC assessment report, along with computational, technical, and administrative staff from across NCAR and UCAR. Additional current and past staff have made significant contributions to the three previous assessments over the past 20 years.
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Kevin Trenberth (CGD) |
Oct. 18, 2007 |
Global Warming: Coming Ready or Not!
(61 minutes)
Trenberth provides future prospects using climate models and the paleoclimate record. He introduces the international framework, including the IPCC, the UNFCCC, and the Kyoto Protocol, while emphasizing the need for consensus and political will, along with strengthened institutions and international governmental mechanisms.
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Guy Brasseur (NCAR, ESSL) |
Oct. 18, 2007 |
The Story of Ozone in Our Atmosphere: A Success Story
(58 minutes)
Brasseur provides a historical perspective on the discovery of the chemical nature of this gas and its ability to protect the biosphere from harmful ultraviolet solar radiation. It took decades for scientists to understand how ozone is formed and how it is destroyed. Brasseur discusses the role of observations, laboratory studies, and modeling in successfully addressing the problem of the Antarctic ozone hole, which was created by the use of industrially manufactured chlorofluorocarbons. The efforts to reduce ozone depletion have also had a protective effect on the climate, making this is a story of success for both the scientific community and policymakers.
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Jose Luis Jimenez (CIRES, University of Colorado Boulder) |
Oct. 17, 2007 |
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Barry Huebert (University of Hawaii) |
Oct. 16, 2007 |
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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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Kevin Trenberth (CGD) |
Sep. 27, 2007 |
Global Warming - USINFO
(3 minutes)
Trenberth helps narrate an outreach video from the U.S. Department of State explaining the climate system and findings by the Intergovernmental Panel on Climate Change (IPCC) that the climate system is warming and human activities are the reason.
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Bert Holtslag (Wageningen University, The Netherlands) |
Sep. 25, 2007 |
Modeling Atmospheric Boundary Layers for Weather and Climate Studies
(42 minutes)
Holtslag addresses the problematic nature of modeling and prediction of the atmospheric boundary in studies of weather, climate, and air quality with an emphasis on conditions over land and ice. He presents results from a study of model intercomparisons organized within the GEWEX Atmospheric Boundary Layer Study (GABLS) for single column models as compared to field observations and fine scale models. He also discusses results from the boundary-layer formulation of the Community Climate Model.
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Peter Gleick (Pacific Institute for Studies in Development, Environment, and Security), William Easterling (Pennsylvania State University), Rosina Bierbaum (University of Michigan) |
Sep. 24, 2007 |
Briefing: Climate Impacts and Adaptation in the United States: Lessons from Agriculture and Water Resources
(97 minutes)
New research in the United States and internationally highlights the need for policymakers to begin to look at combined efforts to reduce greenhouse gas emissions while adapting to unavoidable impacts, particularly in the areas of water resources and agriculture. This briefing addresses what we know and need to know about these climate impacts for the United States and offers insights into what the federal government needs to consider in terms of resources and organization to ensure that national efforts meet the needs of decision makers.
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NCAR & UCAR News Center |
Aug. 30, 2007 |
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Greg Holland (MMM) |
Aug. 15, 2007 |
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D. James Baker (Consultant, Intergovernmental Oceanographic Commission, UNESCO) |
Aug. 09, 2007 |
Risk, Wealth, and Communications - Climate Policy Implications
(25 minutes)
Talk 1 of 7 on Day 2 of the Warren Washington Symposium on Climate Modeling, Prediction, and Science Policy. Baker cites Washington's long history of scientific accomplishments. He then outlines the keys to getting people and governments to invest in reducing carbon emissions. First, people need to understand the risk and act on it. China is a critical player here. Second, business must see that that there are profits and new wealth to be made from carbon sequestration. Lastly, more effective mass communication must get the science and issues to the public.
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Stephen H. Schneider (Stanford University) |
Aug. 09, 2007 |
Finding Warren: Any Fingerprints?
(26 minutes)
Talk 2 of 7 on Day 2 of the Warren Washington Symposium on Climate Modeling, Prediction, and Science Policy. Schneider humorously presents evidence of Washington's involvement in the development of climate science. He then turns to the difficulties of any carbon emission reduction program, such as that recently adopted by California. These include determining a baseline, measuring harm to various sectors, and assigning values to those affected. Climate models may be objective, but nothing about policy implementation is. The science of climate change is mostly settled, but great uncertainty remains when we look at human behavior and the climate system itself.
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Neal Lane (Rice University) |
Aug. 09, 2007 |
A Model Scientist for Global Change
(33 minutes)
Talk 3 of 7 on Day 2 of the Warren Washington Symposium on Climate Modeling, Prediction, and Science Policy. Lane talks about global change from three perspectives: a flattening world, a warming world, and a dumbed-down world. Flattening refers to likely decreases in research funding and numbers of researchers in the United States and likely increases in the developing world. In discussing a warming and a dumbed-down world, he deplores both the lack of federal action in the face of climate change since 2001 and the forces weakening science and strengthening ideology. Lane discusses the important relationship between the National Science Foundation and the National Science Board and notes Washington's role as a model civic scientist in leading the board in difficult times.
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