Hovmöller diagram: Difference between revisions
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Nairb.Idi9 (talk | contribs) Adding local short description: "Diagram for plotting meteorological data to highlight wave behavior", overriding Wikidata description "commonly used way of plotting meteorological data to highlight the role of waves" |
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{{Short description|Diagram for plotting meteorological data to highlight wave behavior}} |
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[[Image:MJO 5-day running mean through 1 Oct 2006.png|thumb|right|This Hovmöller diagram records a ''running mean value'' of [[outgoing longwave radiation]], OLR, which produces contour-values—here shown from +3 to -3—of the [[Madden–Julian oscillation]], MJO. ++ Here, time increases from top to bottom, i.e., vertically, along the ordinate, or y-axis; while the oscillation contours are oriented from left to right, horizontally, on the abscissa, or x-axis. Thus, over ''calendar'' time from April to September, the movements of any specific contour-value are depicted as from west to east—that is, from 20E longitude to 10W longitude.]] |
[[Image:MJO 5-day running mean through 1 Oct 2006.png|thumb|right|This Hovmöller diagram records a ''running mean value'' of [[outgoing longwave radiation]], OLR, which produces contour-values—here shown from +3 to -3—of the [[Madden–Julian oscillation]], MJO. ++ Here, time increases from top to bottom, i.e., vertically, along the ordinate, or y-axis; while the oscillation contours are oriented from left to right, horizontally, on the abscissa, or x-axis. Thus, over ''calendar'' time from April to September, the movements of any specific contour-value are depicted as from west to east—that is, from 20E longitude to 10W longitude.]] |
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A '''Hovmöller diagram''' is a common way of [[Graph of a function|plotting]] [[Meteorology|meteorological]] data to highlight the behavior of [[wave]]s, particularly [[tropical wave]]s. The [[Cartesian coordinate system|axes]] of Hovmöller diagrams depict changes over time of scalar quantities such as [[temperature]], [[density]], and other values of constituents in the [[atmosphere]] or [[ocean]], such as depth, height, or pressure. Typically in that case, time is recorded along the ''abscissa, or x-axis'', while 'vertical' values (of depth, height, pressure, etc.) are plotted along the ''ordinate, or y-axis''. |
A '''Hovmöller diagram''' is a common way of [[Graph of a function|plotting]] [[Meteorology|meteorological]] data to highlight the behavior of [[wave]]s, particularly [[tropical wave]]s. The [[Cartesian coordinate system|axes]] of Hovmöller diagrams depict changes over time of scalar quantities such as [[temperature]], [[density]], and other values of constituents in the [[atmosphere]] or [[ocean]], such as depth, height, or pressure. Typically in that case, time is recorded along the ''abscissa, or x-axis'', while 'vertical' values (of depth, height, pressure, etc.) are plotted along the ''ordinate, or y-axis''. |
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Revision as of 14:33, 10 March 2024
A Hovmöller diagram is a common way of plotting meteorological data to highlight the behavior of waves, particularly tropical waves. The axes of Hovmöller diagrams depict changes over time of scalar quantities such as temperature, density, and other values of constituents in the atmosphere or ocean, such as depth, height, or pressure. Typically in that case, time is recorded along the abscissa, or x-axis, while 'vertical' values (of depth, height, pressure, etc.) are plotted along the ordinate, or y-axis.
The alternate orientation of axes may also be used, as a Hovmöller diagram may be plotted for longitude or latitude on the abscissa and for (advancing) time on the ordinate; then the contour values of a named physical field may be presented through color or shading.
The Hovmöller diagram was introduced by Ernest Aabo Hovmöller (1912-2008), a Danish meteorologist, in a paper published in 1949.[1]
See also
References
- ^ Hovmöller, Ernest (1949), "The Trough-and-Ridge Diagram", Tellus, vol. 1, no. 2, pp. 62–66, doi:10.1111/j.2153-3490.1949.tb01260.x