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The Todd Weather Folios are a collection of continental Australian synoptic charts that were published from 1879 to 1909. The charts were created by Sir Charles Todd's office at the Adelaide Observatory. In addition to the charts, the folios include clippings of newspaper articles and telegraphic and handwritten information about the weather.
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 ).
A surface weather analysis is a type of weather map that depicts positions for high and low-pressure areas, as well as various types of synoptic scale systems such as frontal zones. Isotherms can be drawn on these maps, which are lines of equal temperature. Isotherms are drawn normally as solid lines at a preferred temperature interval. [2]
Low-level prognostic charts used by aviators show the forecast between the Earth's surface and 24,000 feet (7,300 m) above sea level over the next two days. They show areas where visual flight rules are in effect, instrument flight rules are in effect, the height of the freezing level, the location of weather features, and areas of moderate to ...
[2] Although relatively straightforward to measure (visually, for instance, by using a mirror [ 3 ] ), oktas only estimate cloud cover in terms of the area of the sky covered by clouds. They do not account for cloud type or thickness, and this limits their use for estimating cloud albedo or surface solar radiation receipt.
Named "Gordian" by the Free University of Berlin, analysed by them to have deepened below 940 hPa. [341] 924 [342] 2006, 10 December 62° N, 37° W: Named "Xynthia" by the Free University of Berlin, who estimated central pressure below 930 hPa. [343] 928 [344] 2007, 12 December 928 [345] 2009, 23 January Between Iceland and Scotland
Within the region a tropical cyclone is defined as being a non-frontal low-pressure system of synoptic scale that develops over warm waters, with a definite organized wind circulation and 10-minute sustained wind speeds of 34 kn (63 km/h; 39 mph) or greater near the centre. [28]
The omega equation is a culminating result in synoptic-scale meteorology.It is an elliptic partial differential equation, named because its left-hand side produces an estimate of vertical velocity, customarily [1] expressed by symbol , in a pressure coordinate measuring height the atmosphere.