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  2. Anticyclone - Wikipedia

    en.wikipedia.org/wiki/Anticyclone

    An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from above (opposite to a cyclone). [1]

  3. Cyclone - Wikipedia

    en.wikipedia.org/wiki/Cyclone

    Near the center, the pressure gradient force (from the pressure in the center of the cyclone compared to the pressure outside the cyclone) and the force from the Coriolis effect must be in an approximate balance, or the cyclone would collapse on itself as a result of the difference in pressure. [19]

  4. Tropical cyclone - Wikipedia

    en.wikipedia.org/wiki/Tropical_cyclone

    A tropical cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world. [4] [5] The systems generally have a well-defined center which is surrounded by deep atmospheric convection and a closed wind circulation at the surface. [4]

  5. High-pressure area - Wikipedia

    en.wikipedia.org/wiki/High-pressure_area

    A high-pressure area, high, or anticyclone, is an area near the surface of a planet where the atmospheric pressure is greater than the pressure in the surrounding regions. Highs are middle-scale meteorological features that result from interplays between the relatively larger-scale dynamics of an entire planet's atmospheric circulation .

  6. Glossary of meteorology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_meteorology

    The difference between the actual temperature and the dew point at a certain altitude in the atmosphere. A small dew point depression indicates more moisture and higher relative humidity , which in the lower troposphere can result in low cloud bases and lifted condensation levels , which are important factors contributing to the development of ...

  7. Tropical cyclone intensity scales - Wikipedia

    en.wikipedia.org/wiki/Tropical_cyclone_intensity...

    Between 1924 and 1988, tropical cyclones were classified into four categories: depression, deep depression, cyclonic storms and severe cyclonic storms. [22] However, a change was made during 1988 to introduce the category "severe cyclonic storm with core of hurricane winds" for tropical cyclones, with wind speeds of more than 64 kn (74 mph; 119 ...

  8. Low-pressure area - Wikipedia

    en.wikipedia.org/wiki/Low-pressure_area

    Cyclogenesis is the development and strengthening of cyclonic circulations, or low-pressure areas, within the atmosphere. [3] Cyclogenesis is the opposite of cyclolysis, and has an anticyclonic (high-pressure system) equivalent which deals with the formation of high-pressure areas—anticyclogenesis. [4]

  9. Anticyclonic storm - Wikipedia

    en.wikipedia.org/wiki/Anticyclonic_storm

    Anticyclonic storms, as high-pressure systems, usually bring warm, clear conditions in the summer. Occasionally, this can result in heat wave conditions and droughts if the anticyclone remains stationary over a certain region of land. [4] During the winter time, the clear, settled conditions of the anticyclone can lead to frost and fog. This is ...