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In meteorology, the synoptic scale (also called the large scale or cyclonic scale) is a horizontal length scale of the order of 1,000 km (620 mi) or more. [1] This corresponds to a horizontal scale typical of mid-latitude depressions (e.g. extratropical cyclones ).
The HSI is a 0 to 50 point scale, allotting up to 25 points for a tropical cyclone's intensity and up to 25 points for wind field size. [34] Points are awarded on a sliding scale, with the majority of points reserved for hurricane force and greater wind fields. [34] A paper describing the scale was published in 2008. [35]
A polar low is a small-scale, short-lived atmospheric low-pressure system (depression) that is found over the ocean areas poleward of the main polar front in both the Northern and Southern Hemispheres. Polar lows were first identified on the meteorological satellite imagery that became available in the 1960s, which revealed many small-scale ...
The region of Indonesia is not generally traversed by tropical cyclones although a lot of systems have historically formed there. [1] In an analysis of tropical cyclone data from the Bureau of Meteorology since 1907 to 2017 which was published after the dissipation of Cyclone Cempaka found that only around 0.62% of all cyclones in the Australian region during those years occurred north of the ...
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]
Common developmental patterns seen during tropical cyclone development, and their Dvorak-assigned intensities. The Dvorak technique (developed between 1969 and 1984 by Vernon Dvorak) is a widely used system to estimate tropical cyclone intensity (which includes tropical depression, tropical storm, and hurricane/typhoon/intense tropical cyclone intensities) based solely on visible and infrared ...
Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere (a low-pressure area). [1] Cyclogenesis is an umbrella term for at least three different processes, all of which result in the development of some sort of cyclone, and at any size from the microscale to the synoptic scale.
The most recognisable of these from name alone is arguably the tropical variety, though tropical cylones are just one type of cyclonic weather system of many. Cyclones in meteorology can vary in scale from small mesocyclones through to large extratropical cyclones, to often smaller but far more powerful tropical cyclones.