Science / Weather / Equatorial Trough: The quasi-continuous area of low pressure between the subtropical high pressure areas in both the Northern and Southern Hemisphere.
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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
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
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
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
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
Science / Tides and Currents / Equatorial Undercurrent: A subsurface current setting eastward along the Equator in the Pacific, Atlantic, and Indian Oceans. In the Pacific, its core of maximum velocity lies at a depth of about 100 meters within the South E MORE