Science / Weather / Equatorial Trough: The quasi-continuous area of low pressure between the subtropical high pressure areas in both the Northern and Southern Hemisphere. 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 / 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 / Weather / Upper Level: The portion of the atmosphere which is above the lower troposphere. It is generally applied to the levels above 850 millibars. Therefore, upper level lows and highs, troughs, winds, observations, and MORE
Science / Weather / Wave Length: The least distance between particles moving in the same phase of oscillation of a wave. In oceanography, it is the horizontal distance between the highest parts of two successive wave crests above the MORE
Science / Marine Biology / Trade Winds: Persistent winds at low latitudes in both the Northern and Southern hemispheres, blowing toward the west and the equator MORE