| Section E | E index | 411-419 of 498 terms |
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eupatheoscopeAn instrument designed by A. F. Dufton in 1929 to record the warmth of a room from the point of view of comfort. It consists of a blackened hollow copper cylinder heated by a carbon filament and a metal filament lamp, which are controlled by a thermostat to maintain a temperature of 75°F. The power used is interpreted in terms of equivalent temperatures.
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euphotic zoneThe layer of a water body that receives sufficient sunlight to support effective photosynthesis.
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euraquilo(Also called euroaquilo, euroclydon.) A stormy wind from northeast or north-northeast in Arabia and the Near East. See gregale.
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eurithermicAdaptable to a wide range of temperatures. It is used in reference to organisms.
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European Remote Sensing Satellites(Abbreviated ERS.) A series of satellites designed to study the earth's land, atmosphere, and oceans. The major instruments on ERS are an active microwave instrument, a radar altimeter, and an along-track scanning radiometer. The active microwave instrument operates in three modes: SAR image mode, SAR wave mode, and wind scatterometer mode. The scanning radiometer is made up of two instruments, an infrared radiometer and a microwave sounder. ERS-2 also has a global ozone monitoring experiment. ERS-1 was launched in 1991 and ERS-2 in 1995. Both satellites operate in sun-synchronous, near-polar orbits.
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EurosThe Greek name for the stormy, rainy southeast wind. On the Tower of the Winds at Athens it is represented by an old man, warmly clothed and wrapped in his mantle.
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eustatic sea level changesWorldwide changes of sea level due to the increase in the volume of water in the ocean basins. Volume changes are due to mass increases from melting of grounded ice and thermal expansion or contraction of the oceans as they warm or cool. Over geological time the shape and volume of the ocean basins themselves also evolve.
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evanescent levelA theoretical boundary between a region in the fluid where waves of some frequency are propagating and a region in the fluid where waves of the same frequency do not propagate (where they are evanescent). This is also called a critical level but is distinct from the critical level where the background flow has the same speed as the phase speed of the waves.
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