A cloud which is dependent on a larger cloud system for development and continuance. Roll clouds, shelf clouds, and wall clouds are examples of accessory clouds.
- 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
A self-contained housing unit incorporated within a single-family dwelling (not within accessory structures, except with a Special Permit) that is clearly a subordinate part of the single-family dwelling.
- Browse Related Terms: Accessory Dwelling Unit (ADU), Air Retarder/Barrier, Dome (Geodesic), Monolithic, Passive Solar Home, Slab, Sunspace, Super Insulated Houses
The evaluation of the nature, severity, and impact of an accident. Dam operating personnel are primarily responsible for accident assessment for incidents at Reclamation dams.
- Browse Related Terms: Accident assessment, BDD, Early warning system (EWS), Emergency classification levels, Evacuation, Evacuation warning, Formulation process, Lead time, Local capabilities assessment, Potential spill, Protective action decision making (recommendations), Sheltering (in-place)
- Browse Related Terms: absorbed dose, Absorption factor, Acclimation, Baseline profile, Biological magnification (biomagnification), Biotic potential, Biotic pyramid, Biotype, Carnivore, Coliform, Demersal, drift, environment, Food chain, herbicide, Inorganic, Pollutant, Primary production, remote sensing
- Browse Related Terms: acclimatization, antibiotic resistance, antigenic switching, capsule, cellulosome, chip, disinfection, disinfestation, DNA chip, dual culture, exopolysaccharide, filter sterilization, flaming, floccule, fouling, fungus, GEM, germicide, inoculation cabinet, live vaccine, microbe, remediation, sepsis, serology, single-cell protein, sterile, sterilize
The growth of a precipitation particle by the collision of an ice crystal or snowflake with a supercooled liquid droplet that freezes upon impact.
- Browse Related Terms: Accretion, collection efficiency, frost, Glaze, Hoarfrost, Icing, Rime, snow, Supercool
The growth of a precipitation particle by the collision of a frozen particle with a supercooled liquid water droplet which freezes upon impact.
used in paleoclimatology to describe the deposition of sediment or other material over time. Accumulation rates are usually measured as mass/time, volume/time, or mass/length2/time.
- Browse Related Terms: Absolute humidity, accumulation, air density, Air Pressure, Atmosphere, Atmospheric Pressure, Barrel, Concentration, Density, doppler velocity (m/s), Electrons, Mixing Ratio, particle number concentration, particle size distribution, Specific Humidity, stability, Streamflow, Subsidence, Sverdrup, Vapor Pressure
A component of a heat pump that stores liquid and keeps it from flooding the compressor. The accumulator takes the strain off the compressor and improves the reliability of the system.
- Browse Related Terms: Accumulator, Dam, Energy Storage, Eutectic Salts, Heat Storage Capacity, Phase-Change Material, Rock Bin, Solar Mass, Thermal Capacitance, Thermal Mass, Trombe Wall, Useful Heat, Water Wall
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Accuracy The extent to which the results of readings of an instrument approach the true value of the calculated or measured quantities, supposing that all possible corrections are applied.
- Browse Related Terms: Accuracy, Buoy weather station, Drifting buoy, Grid, Instrument shelter, Radiosonde, Scale, Upper atmosphere
How closely an instrument measures the true or actual value of the process variable being measured or sensed.
- Browse Related Terms: Accuracy, Evaporimeter, Federal Snow Sampler, Float Recording Precipitation gage, Gauge pressure, Manometer, Philadelphia rod, Pounds per square inch (psi or lb/in2), Radioisotope Snow Gage, Snow Pillow, Snow Stake, Snow Stick, Tensiometer, Turn angles
Degree of conformity of a measure to a standard or true value; in other words, how close a predicted or measured value is to the true value.
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area of critical environmental concern.
- Browse Related Terms: ACEC, Adaptation, Affected environment, AQIA, EA, EIS, Emergency evacuation zones, Environmental assessment (EA), Environmental Impact Statement (EIS), Finding of no significant impact (FONSI), FONSI, Mitigation measures, National Environmental Policy Act (NEPA), Probability, Programmatic environmental impact statement (PEIS), Public involvement, Tiering
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Tissues or organisms that are not made up of separate cells but often have more than one nucleus.
- Browse Related Terms: acellular, amitosis, anaphase, cell division, cell fusion, centriole, centrosome, cybrid, cytokinesis, embryo sac, Enucleated oocyte (cytoplast), enucleated ovum, karyokinesis, micro-isolating system, mitogen, restitution nucleus
Automated Coastal Engineering System.
- Browse Related Terms: ACES, ADP, Advanced Weather Interactive Processing System (AWIPS), AIS, ARMS, ARTS, Bubbler Gage, Crest Gage, Flood of Record, Remote Observing System Automation (ROSA), SNOw TELemetry (SNOTEL)
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- An acid with the structure of C2H4O2. Acetyl groups are bound through an ester linkage to hemicellulose chains, especially xylans, in wood and other plants. The natural moisture present in plants hydrolyzes the acetyl groups to acetic acid, particularly at elevated temperatures.
- Browse Related Terms: acetic acid, acid insoluble lignin, alkali lignin, ester, fatty acid, Klason lignin, lignocellulose, mass closure (%), native lignin, structural chemical analysis, total lignin, triglyceride, willstatter lignin, wood
(Abbreviation: acetyl CoA) A compound formed in the mitochondria when an acetyl group (CH3CO-) - derived from breakdown of fats, protein s, or carbohydrates - combines with the thiol group (-SH) of co-enzyme A.
- Browse Related Terms: acetyl co-enzyme A, acetyl CoA, CaMV, CaMV 35S, cauliflower mosaic virus