West
- Browse Related Terms: EWD, Kelvin Waves, NAO, North Atlantic Oscillation, Oceanography, Return Flow, Thermocline, Tropical Cyclone, W
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Abbreviation for weight per volume. The relative proportions of solid and liquid in a solution.
- Browse Related Terms: amniotic fluid, autoclave, Biofuel, biomass concentration, encapsulating agents, exude, filtration, fog, gas transfer, imbibition, infiltrate, liquid membrane, liquid nitrogen, micro-injection, nucleoplasm, pinocytosis, pipette, Supernatant, volatilization, w/v, wetting agent
Warm Air Advection - the advection (movement) of warm air into a region.
- Browse Related Terms: Advection fog, CAA, CD, Cold Advection, Foehn Pause, Freezing Spray, Frostbite, Heavy Freezing Spray, Lake Effect Snow, Marine Inversion, Sea Fog, Stable, Stable Boundary Layer, Steam Fog, Thermal High, Thermal Wind, upwelling, WAA
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A thin sheet of semiconductor (photovoltaic material) made by cutting it from a single crystal or ingot.
- Browse Related Terms: Amorphous Semiconductor, Contact Resistance, Doping, lattice, Photovoltaic (Solar) Cell, Polycrystalline, Scribing, Series Resistance, Silicon, Wafer
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The region of turbulence immediately to the rear of a solid body caused by the flow of air over or around the body.
- Browse Related Terms: Adiabatic Process, Ambient Air, conduction, deepwater, General Circulation Model, Heat, sensible heat flux, Temperature, Thermal, Thermohaline Circulation, thermohaline circulation (THC), upwelling, Vorticity, wake
The region of turbulence immediately to the rear of a solid body caused by the flow of air over or around the body.
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Enhanced plume dispersion due to mechanical turbulence and zones of turbulent eddies, primarily downwind of a building, which results in increased ground-level concentrations of pollutants.
- Browse Related Terms: AERMOD, Area sources (emissions), Emission factor, Fugitive dust, Lead, Non-point source pollution, Nonpoint sources, Nonroad mobile sources (emissions), Onroad mobile source (emissions), Plume model, Point source (emissions), source, Toxic air pollutant (TAP), Wake effect
All > Science > Biotechnology and Genetics > Food Biotechnology
See: chromosome walking; primer walking.
- Browse Related Terms: balanced lethal system, chromomeres, chromonema, chromosome banding, chromosome mutation, compound chromosome, endomitosis, endoreduplication, fluorescence in situ hybridization, gene insertion, gene replacement, genome, hybrid dysgenesis, Independent assortment, jumping library, karyogram, lampbrush chromosome, locus, Locus (plural = loci), meiotic drive, paternal, polymorphism, Restriction fragment length polymorphism (RFLP), tetrasomic, walking, X-linked, zoo FISH
A vertical structural element that holds up a roof, encloses part or all of a room, or stands by itself to hold back soil.
- Browse Related Terms: Attic, Bearing Wall, Cathedral Ceiling/Roof, Flat Roof, Joist, plenum, Radiant Ceiling Panels, Rafter, Roof Ventilator, Sheathing, Soffit, Wall
A localized, persistent, often abrupt lowering from a rain-free base. Wall clouds can range from a fraction of a mile up to nearly five miles in diameter, and normally are found on the south or southwest (inflow) side of the thunderstorm. When seen from within several miles, many wall clouds exhibit rapid upward motion and cyclonic rotation.
However, not all wall clouds rotate. Rotating wall clouds usually develop before strong or violent tornadoes, by anywhere from a few minutes up to nearly an hour. Wall clouds should be monitored visually for signs of persistent, sustained rotation and/or rapid vertical motion.
"Wall cloud" also is used occasionally in tropical meteorology to describe the inner cloud wall surrounding the eye of a tropical cyclone, but the proper term for this feature is eyewall.
- Browse Related Terms: Accessory Cloud, ACLD, Anvil Rollover, Arcus, Barber Pole, Chinook Arch, Cloud Layer, Cloud Movement, Collar Cloud, Differential Motion, Drop-size Distribution, Eye Wall, Rain-free Base, Roll Cloud, Scud, Sea Breeze Convergence Zone, TOP, Unstable Air, Wall Cloud
Frictional resistance mobilized between a wall and the soil or rock in contact with the wall.
- Browse Related Terms: Active earth pressure, Adhesion, Angle of external friction (angle of wall friction), Angle of wall friction, Dilatancy, Direct shear test, Friction, Passive earth pressure, Shear strength, Vane shear test, Wall friction
The geographical direction that the primary or largest exterior wall of a building faces.
- Browse Related Terms: Airlock Entry, Awning, Baseboard Radiator, Earth Berm, Earth Sheltered Houses, Flashing, Historic Area, overhang, Passive/Natural Cooling, Perimeter Heating, Roof, Siding, Storm Door, Trellis, Underground Home, Wall Orientation, Weatherstripping
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Pressure that a cell wall exerts against the turgor of the cell contents. Wall pressure is equal and opposite to the turgor potential.
- Browse Related Terms: ampicillin, Ampicillin (beta-lactamase), anticlinal, callus, Gram staining, lysozyme, macerate, microplast, middle lamella, periclinal, plasmodesma, primary cell wall, root hairs, septum, Shear, sieve plate, spheroplast, wall pressure
Transport of warm air into an area by horizontal winds. Low-level warm advection sometimes is referred to (erroneously) as overrunning. Although the two terms are not properly interchangeable, both imply the presence of lifting in low levels.
- Browse Related Terms: ALF, Cold Pool, Frontal Inversion, Omega High, OVRN, SHLW, Upper Level Disturbance, Warm Advection
A low pressure area which is warmer at its center than at its periphery. Tropical cyclones exhibit this temperature pattern. Unlike cold core lows, these lows produce much of their cloud cover and precipitation during the nighttime.
- Browse Related Terms: Alberta Clipper, Closed Low, Depression, Doldrums, Extratropical Low, LOPRES, Pre-Frontal Trough, Pressure Couplet, Pressure Gradient Force, Thermal Belt, Thermal Low, trade winds, Trough, Warm Core Low
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Warm front The forward edge of an advancing warm air mass that is displacing cooler air in its path.
A transition zone between a mass of warm air and the colder air it is replacing.
- Browse Related Terms: Advection fog, arctic air, Arctic air mass, Arctic front, Arctic Sea Smoke, cold front, contrail (condensation trail), front, front (or frontal zone), frontal inversion, Occluded Front, Polar low, Sea smoke, stationary pressure, Vortex, Warm front
A transition zone between a mass of warm air and the colder air it is replacing.
A frontal zone formed when a cold front overtakes a warm front and, finding colder air ahead of the warm front, leaves the ground and rises up and over this denser air. Compare with cold occlusion.
- Browse Related Terms: CFP, Cold Occlusion, FROPA, Katafront, Occluded Front, Occluded Mesocyclone, OCFNT, PSG, Stationary Front, Warm Occlusion, Warm Sector, WFP, Wrapping Gust Front, WRM, WRMFNT
A region of warm surface air between a cold front and a warm front.
- Browse Related Terms: CFP, Cold Occlusion, FROPA, Katafront, Occluded Front, Occluded Mesocyclone, OCFNT, PSG, Stationary Front, Warm Occlusion, Warm Sector, WFP, Wrapping Gust Front, WRM, WRMFNT
Generally, water or water system that has an environment suitable for species of fish other than salmonids.
- Browse Related Terms: AFRP, Alevin, Anadromous, Angler-day, Cold-water fishery, Fish weir, Forage fish, Hatchery, ichthyology, Juvenile, Nonconsumptive water uses, Rough fish, Salmonids, Spawn, Warm-water fishery, Wetlands, Wildlife Refuge, Young-of-year
The fourth of five Early Warning System components consisting of the processes (including the media) and equipment necessary to make the public aware of potential, probable, or imminent danger or risk. A warning should be designed to prompt the population at risk to take protective action.
- Browse Related Terms: 24-hour warning point, ALERT Flood Warning System, Decision making, Detection, Early warning system feasibility, EWS, IFLOWS, Implementation process, Integrated early warning system, LFWS, Notification, Operations and Maintenance (O&M), Warning
A warning is issued when a hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property.
- Browse Related Terms: Advisory, ADVY, CEM, Civil Emergency Message, Hurricane Local Statement, River Flood Statement, Urban and Small Stream Flood Advisory, Urban Flooding, Warning
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The depth of water in a river at which the National Weather Service (NWS) reviews basin conditions for potential flooding.
- Browse Related Terms: ASOS, B-44 Form, Cooperative Station Report, Climate, Congressional Organic Act of 1890, County Warning Forecast Area (CWFA), Hydrologic Service Area (HSA), Hydrologic Services, Hydrometeorological Report (HMR), Mission of the National Weather Service, National Interagency Fire Center (NIFC), National Weather Service (NWS), Regional Operations Manual Letter (ROML), Warning stage, Weather Forecast Office (WFO)