North
- Browse Related Terms: Alaska Current, Aleutian Current, Antilles Current, Azores Current, Hague Line, N, NC, PNA, Rex Block, Typhoon Season
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A semiconductor produced by doping an intrinsic semiconductor with an electron-donor impurity (e.g., phosphorous in silicon).
- Browse Related Terms: Dendrite, Hydrogenated Amorphous Silicon, I-Type Semiconductor, Intrinsic Layer, Junction, Light-Induced Defects, Minority Carrier, N-Type Semiconductor, P N, P-I-N, P-Type Semiconductor, Photovoltaic Device, Semiconductor
All > Science > Energy > Renewable Energy > Solar Energy
- See National Ambient Air Quality Standards
- Browse Related Terms: Air Quality Control Region (AQCR), Attainment, Class I area, Class II area, Clean Air Act (CAA), Criteria air pollutants, Exceedance, In attainment, NAAQS, Nonattainment area, Permit, Prevention of Significant Deterioration (PSD) Program, PSD increments
The cover for the gear box, drive train, generator, and other components of a wind turbine.
- Browse Related Terms: Balance-of-System, Darrius (Wind) Machine, drag, Furling, gas turbine, hybrid system, Kaplan Turbine, Leading Edge, Lift, Nacelle, Panemone, Projected Area, Rotor, Solidity, Swept Area, Tip Speed Ratio, Trailing Edge, Wind Power
Clouds of unknown composition that have a soft, pearly luster and that form at altitudes about 25 to 30 km above the Earth's surface. They are also called "mother-of-the-pearl clouds."
- Browse Related Terms: Air, Climate System, Conjugate Points, Downwelling Radiation, Equinox, Free Atmosphere, Ground Heat Flux, Latent Heat Flux, Lightning Discharge, Mesoclimate, Nacreous Clouds, Net All-Wave Radiation, Noctilucent Clouds, Radiational Cooling, Rain, Rotation, Sensible Heat Flux, Surface Energy Budget, Surface-based Convection, Visible Satellite Imagery
The point on any given observer's celestial sphere diametrically opposite of one's zenith.
- Browse Related Terms: AMOS, Blowing, Cooperative Observer, GoMoos, Hourly Precipitation Data (HPD), Isochrone, Mesonet, Meteogram, Nadir, OBS, parameter, Rawinsonde Observation, Reconnaissance Code, report, Station Model, Upper Level
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All > Science > Biotechnology and Genetics > Food Biotechnology
A bud not protected by bud scales.
- Browse Related Terms: apical dominance, bud sport, budding, determinate growth, indeterminate growth, latent bud, lateral bud, mixed bud, naked bud, nodal culture, Node, plumule, Runner, shoot tip, single node culture, sympodial, terminal bud, turion
The operational North American Meso (NAM, formerly Eta) is run four times per day (00,06,12,18Z), all cycles run to 84-h.
- Browse Related Terms: Climate Diagnostics Center, Coordinated Universal Time (UTC), GMT, Intermediate Synoptic Times, Main Synoptic Times, MAINT, NAM, Standard Synoptic Times, Universal Time (UT), UTC, Z, Zulu (Z) Time
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A metal tag attached to a machine or appliance that contains information such as brand name, serial number, voltage, power ratings under specified conditions, and other manufacturer supplied data.
- Browse Related Terms: Declining Block Rate, Electric Rate, Electric Rate Schedule, Energy Charge, Energy Security Act of 1980, Fair market value, Federal Energy Regulatory Commission (FERC), Federal Power Marketing Administrations (PMA), Fractional Horse Power Motor, Name Plate, Rate Schedule, Real Price, true power, Wholesale Wheeling
- Equipment rating as required by the purchaser.
- Browse Related Terms: Bonneville Power Administration (BPA), BPA, Cooperative electric utility, Electric power industry, Investor owned utility (IOU), Lease of power privilege, Municipal utility (municipally-owned electric system), Municipalization, Name plate capacity, preference, Preference customers, Rural electric cooperative (cooperatively-owned electric utility), Wholesale customers
- Power generation capacity of a generator that can be guaranteed under continuous operation.
- Browse Related Terms: Auxiliary equipment, Average energy, Capacity, Combined cycle plant, Generator nameplate capacity, Installed capacity, Nameplate, Powerplant, Powerplant capacity, Rated capacity, Rated head
All > Science > Energy > Renewable Energy > Solar Energy
The maximum power-generating capacity of a generator or power-generating facility.
- Browse Related Terms: Application for Certification (AFC), Capacity Factor, Dispatchable power (dispatchability), Distributed Generation, Maximum output, Nameplate rating, Power block, Power production capacity, Rated battery capacity, Renewable Resource Generation Development Area (GDA), STG, Thermoelectric (power) water use, Utility scale facilities, Withdrawal
- One millionth of a millimeter.
- Browse Related Terms: Allopatric, BRM, Nanometer (millimicron), Project, Radial
A unit of magnetism equal to 10-9 tesla, equivalent to a gamma (10-5 gauss).
- Browse Related Terms: Astronomical Unit, Emerging Flux Region (EFR), Filament, Gamma, Geophysics, Interplanetary Magnetic Field, Leader Spot, Magnetogram, Magnetosphere, MEGG, Mount Wilson Magnetic Classifications, Nanotesla (nT), Neutral Line, PDMT, Plage, Sector Boundary, Sferic, Solar Wind, sunspot, Sunspot Group Classification, Two-Ribbon Flare
North Atlantic Oscillation - the NAO is a large-scale fluctuation in atmospheric pressure between the subtropical high pressure system located near the Azores in the Atlantic Ocean and the sub-polar low pressure system near Iceland and is quantified in the NAO Index. The surface pressure drives surface winds and wintertime storms from west to east across the North Atlantic affecting climate from New England to western Europe as far eastward as central Siberia and eastern Mediterranean and southward to West Africa.
- Browse Related Terms: EWD, Kelvin Waves, NAO, North Atlantic Oscillation, Oceanography, Return Flow, Thermocline, Tropical Cyclone, W
This index measures the anomalies in sea level pressure between the Icelandic low pressure system and the Azores high pressure system in the North Atlantic Ocean.
When the NAO is in its is positive phase (+NAO), the northeastern United States sees an increase in temperature and a decrease in snow days; the central US has increased precipitation, the North Sea has an increase in storms; and Norway along with Northern Europe has warmer temperatures and increased precipitation.
When the NAO is in its negative phase (-NAO), the Tropical Atlantic and Gulf coast have increased number of strong hurricanes; northern Europe is drier, and Turkey along with other Mediterranean countries has increased precipitation.
- Browse Related Terms: AO, Arctic Oscillation, El Niño, INTSFY, La Niña, NAO Index, NEG, Negative-tilt Trough, NW, Oscillation, Pacific Decadal Oscillation, PDO, Positive-tilt Trough, Southern Oscillation
All > Science > Weather > Climate Change
A generic term applied to a petroleum fraction with an approximate boiling range between 122 and 400 degrees Fahrenheit.
- Browse Related Terms: Asphalt, Bunker fuel, Distillate fuel oil, Kerosene, lubricant, Naphtha, Petrochemical feedstock, Petrochemicals, Petroleum coke, Residual fuel oil, Special naphtha, Waxes, Wood energy
All > Science > Biotechnology and Genetics > Food Biotechnology
A plasmid that can replicate in one, or at most a few, different bacterial species.
- Browse Related Terms: Amplification, assortment, broad-host-range plasmid, Cloning vector, curing, gene conversion, multi-copy, narrow-host-range plasmid, operational definition, Plasmid, Relaxed plasmid, replicase, replicon, replisome, shuttle vector, Stringent plasmid
All > Science > Biotechnology and Genetics > Food Biotechnology
The proportion of the phenotypic variance that is due to variation in breeding values; the proportion of the phenotypic variance that is due to additive genetic variance.
- Browse Related Terms: additive genetic variance, balanced polymorphism, breed at risk, EBV, elite tree, farm animal genetic resources, fertile, founder animal, genetic diversity, genetic selection, narrow-sense heritability, non-additive genetic variation, Population genetics, selection, true-to-type
In the United States, national standards for the ambient concentrations in air of different air pollutants designed to protect human health and welfare.
- Browse Related Terms: Air Quality Model, Class I Areas, DTRT, National Ambient Air Quality Standards, Nonattainment area, Prevention of Significant Deterioration, Primary Ambient Air Quality Standards, Secondary Ambient Air Quality Standards