Equatorial Trough

Science / Weather / Equatorial Trough: The quasi-continuous area of low pressure between the subtropical high pressure areas in both the Northern and Southern Hemisphere.

North Equatorial Current

Science / Tides and Currents / North Equatorial Current: A current setting west-ward in the North Atlantic and North Pacific Oceans and in the Indian Ocean from about October to July. It occurs immediately north of the Equatorial Counter Current. MORE

Pre-Frontal Trough

Science / Weather / Pre-Frontal Trough: An elongated area of relatively low pressure preceding a cold front that is usually associated with a shift in wind direction. MORE

South Equatorial Current

Science / Tides and Currents / South Equatorial Current: A current setting west-ward along and south of the Equator in the Atlantic and Pacific Oceans, and south of the Equator in the Indian Ocean. It occurs immediately south of the Equatorial Counter Curre MORE

Trough

Business / Finance / Trough: The four times a year that the S&P futures contract expires at the same time as the S&P 100 index option contract and option contracts on individual stocks. It is the last trading hour on the third Fr MORE

Equatorial Arcs

Science / Astrology / Equatorial Arcs: A method of progressing house cusps, based upon the Earth's rotation, in which one year of life corresponds to the passage of 1° right ascension over the meridian, approximately four minutes of time. MORE

Long Wave Trough

Science / Weather / Long Wave Trough: A wave in the prevailing westerly flow aloft which is characterized by a large length and amplitude. A long wave moves slowly and is persistent. Its position and intensity govern weather patterns over MORE

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