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April Burke, Joel Widder (Lewis Burke Associates) |
Oct. 10, 2006 |
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Peter Gilman (HAO) |
Sep. 27, 2006 |
A 42-Year Quest to Understand the Solar Dynamo and Predict the Solar Cycle - 2006 Hale Prize Lecture
(62 minutes)
Gilman traces his career in solar physics from its beginnings at MIT with his PhD thesis, which attempted to explain the differential rotation of the sun using meteorological concepts. Gilman reviews the various developments in our understanding of the solar dynamo from the early 1960s to his current collaboration with Mausumi Dikpati that has successfully simulated and "predicted" the relative peaks of the past 8 solar cycles, using a flux-transport solar dynamo. (Their prediction for solar cycle 24 is described here.) In the near future, they plan to search for ways to predict details of individual cycles and produce a unified theory of the solar cycle and active longitudes. He looks forward to the dawn of solar magnetic "climate and weather" predictions.
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Frank Nutter (Reinsurance Association of America), Maria Pirone (Atmospheric and Environmental Research), Walter Dabberdt (Vaisala Group), Philip Ardanuy (Raytheon Information Solutions) |
Jun. 22, 2006 |
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National Science Foundation |
Jun. 12, 2006 |
HIAPER, the NSF/NCAR Gulfstream-V, the Nation's Most Advanced Research Aircraft
(3 minutes)
An introduction to the NSF/NCAR HIAPER aircraft, a modified Gulfstream-V jet. This NSF video describes its maiden research flights for the Terrain-induced Rotor Experiment. During T-REX an international team of 60 researchers gathered data about treacherous whirlwind turbulence, called atmospheric rotors, and the waves of air associated with them.
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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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Douglas Nychka (IMAGe) |
Nov. 11, 2005 |
The Ensemble Kalman Filter: The Movie
(49 minutes)
This talk focuses on the update steps of the data assimilation cycle and mentions the DART (Data Assimilation Research Testbed) home page, which offers tutorials.
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Roy Rasmussen (RAL), David Yates (RAL), John Wilson (New Mexico Institute of Mining and Technology) |
Nov. 04, 2005 |
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John Ogren (NOAA) |
Oct. 25, 2005 |
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Isaac Held (Princeton University) |
Oct. 11, 2005 |
Idealized Models of the General Circulation
(59 minutes)
The gap between models used to understand atmospheric dynamics and comprehensive general circulation models is discussed. Issues include cloud forcing and atmospheric numerics.
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Greg Holland (MMM), George Forristall (Forristall Ocean Engineering), Andrew Castaldi (Swiss Re Americas) |
Oct. 11, 2005 |
Hurricane Katrina Briefing in Washington
(56 minutes)
The first part of this congressional briefing reviews scientific developments that support reducing hurricane impacts, including the Advanced Research version of the Weather Research and Forecasting community model (WRF). The second part of the talk gives the offshore oil industry's perspective on hurricane preparedness; the last part focuses on catastrophe modeling technology from the insurance industry.
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Isaac Held (Princeton University) |
Oct. 10, 2005 |
The Response of the Hydrological Cycle to Global Warming
(64 minutes)
Researchers studied an archive of general circulation model results. This talk focuses on cases in which the models agree on the effects of climate change on the water cycle, with limited discussion of divergent results.
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Dale Barker (MMM) |
Jul. 28, 2005 |
WRF-Var Background Error Generation
(25 minutes)
Talk 19 of 19. The presenter explains the gen-be utility to calculate local background error statistics, which is the subject of most user questions about the Weather Research and Forecasting Model's WRF-Var algorithm.
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Dale Barker (MMM) |
Jul. 28, 2005 |
The WRF-Var System
(45 minutes)
Talk 16 of 19. The steps involved (including tips) in running the WRF-Var software application are explained. Cold-start mode and cycling mode are discussed.
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Dale Barker (MMM) |
Jul. 28, 2005 |
Variational Data Assimilation System (WRF-Var) Overview
(59 minutes)
Talk 15 of 19. This talk introduces a variational data assimilation system for the Weather Research and Forecasting model (WRF). Topics include the WRF-Var algorithm, background error modeling, FGAT (first guess at appropriate time), radar reflectivity, the gen_be utility to calculate local background error statistics, and global 3D-Var capabilities.
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Wei Huang (MMM) |
Jul. 28, 2005 |
Tutorial Notes: WRF-Var Software 2.1
(25 minutes)
Talk 18 of 19. This talk reviews the software, data structures, and registry of WRF-Var, supplementing the material in talks 13 and 14 (Tutorial Notes: WRF Software 2.1). The presenter discusses how to adapt code to take advantage of local computing resources.
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Yong-Run Guo (MMM) |
Jul. 28, 2005 |
How to Get Observations for WRF-Var
(22 minutes)
Talk 17 of 19. This talk reviews the data formats that are supported by WRF-Var for the observations file, the BUFR, ASCII (MM5/LITTLE_R), and Radar OBS (radial velocity and reflectivity) format. The steps needed to run the OBS preprocessor are explained.
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John Michalakes (MMM) |
Jul. 27, 2005 |
Tutorial Notes: WRF Software 2.1 (Part 2 of 2)
(35 minutes)
Talk 14 of 19. This is the second half of the software talk for WRF. The registry is discussed, which is an active data dictionary database that allows users to manipulate state data and add a variable to the model. The presenter shows several examples.
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John Michalakes (MMM) |
Jul. 27, 2005 |
Tutorial Notes: WRF Software 2.1
(88 minutes)
Talk 13 of 19. This is the first half of a talk on the development of the Weather Research and Forecasting Model (WRF). It highlights the key software design features and also discusses computer platforms currently supported, enhancements, and the use of domain decomposition to divide the work between multiple parallel processors.
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Cindy Bruyere (MMM) |
Jul. 27, 2005 |
WRF Post-Processing
(87 minutes)
Talk 12 of 19. This talk presents netCDF (network Common Data Form), the major output format for WRF, and the four graphical tools supported by NCAR: NCL (NCAR Command Language), RIP4 (Read/Interpolate/Plot), GrADS (Grid Analysis and Display System), and Vis5D.
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Dave Gill (MMM) |
Jul. 26, 2005 |
How to Set Up and Run WRF for One-Way and Two-Way Nesting
(39 minutes)
Talk 11 of 19. This talk describes nesting, a horizontal mesh refinement capability in WRF. The presenter discusses feedback from the child domain to the parent domain, lateral boundary conditions, and the ndown program.
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