Science / Tides and Currents / Diurnal: Having a period or cycle of approximately one tidal day. Thus, the tide is said to be diurnal when only one high water and one low water occur during a tidal day, and the tidal current is said to be diurnal when there is a single flood and a single ebb period of a reversing current in the tidal day. A rotary current is diurnal if it changes its direction through all points of the compass once each tidal day. A diurnal constituent is one which has a single period in the constituent day. The symbol for such constituent is the subscript 1.See stationary wave theory and type of tide.

Other Words for Diurnal

Diurnal Adjective Synonyms: daily, circadian, day-to-day, regular, everyday, quotidian, daytime


Science / Tides and Currents / Semidiurnal: Having a period or cycle of approximately one-half of a tidal day. The predominant type of tide throughout the world is semidiurnal, with two high waters and two low waters each tidal day. The tidal c MORE

Great Diurnal Range (GT)

Science / Tides and Currents / Great Diurnal Range (GT): The difference in height between mean higher high-water and mean lower low water. The expression may also be used in its contracted form, diurnal range. MORE

Age Of Diurnal Inequality

Science / Tides and Currents / Age Of Diurnal Inequality: The time interval between the maximum semimonthly north or south declination of the Moon and the maximum effect of declination upon range of tide or speed of the tidal current. The age may be computed MORE