- Industry: Education
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Founded in 1876, Texas A&M University is a U.S. public and comprehensive university offering a wide variety of academic programs far beyond its original label of agricultural and mechanical trainings. It is one of the few institutions holding triple federal designations as a land-, sea- and ...
In geophysical data processing this is most simply defined as any unwanted signal, and given that one person’s signal can be another person’s noise, this is ultimately a relative term. For example, if a time series is created by taking the temperature at some location every hour for five years, then the daily cycle of temperature that will be seen in such a record is a signal for someone looking for the daily cycle but is noise to someone looking for monthly or seasonal temperature variations.
Industry:Earth science
In linear cases, PIPs reduce to damped normal modes or POPs, that represent the eigenoscillations of the reduced linear dynamical system.
Industry:Earth science
In marine ecology, the ratio of the production of one trophic level to that of the next. This is a reasonable estimate of the ecological efficiency if it is assumed that the energy extracted from a given trophic level is proportional to its production.
Industry:Earth science
In meteorology, a line or contour of constant wind speed. An alternative is isovel.
Industry:Earth science
In meteorology, a region of relatively high barometric pressure. These are characterized by subsidence at altitude and by divergence near the surface. They predominate at 30 and 90° latitude where the global generation circulation patterns exhibit downward motion. This type of circulation feature is also known as an anticyclone and as such rotates clockwise/counterclockwise in the norther/southern hemisphere. High pressure systems are generally characterized by clear skies and fair weather since cloud development is impeded therein, and winds are also generally light.
Industry:Earth science
In meteorology, an approximation made to simplify the equations of motion in spherical coordinates where the radial distance r is replaced by a+z, where the altitude z is much smaller than the radius of the Earth r.
Industry:Earth science
In meteorology, the name given to synoptic weather charts prepared by hand since the resulting diagnosis or analysis relied extensively on the subjective judgment of the preparer. Compare to objective analysis.
Industry:Earth science
In numerical analysis this refers to a computational grid in or on which separate dependent variables are represented on alternate or staggered grid points. For example, a 1-D equation set for pressure and velocity would be solved on a grid where the pressure is represented at points n, n+2, n+4, etc. while the velocity is represented at n+1, n+3, n+5, etc. This procedure can confer numerical advantages and is also used for problems with more than one spatial dimension.
Industry:Earth science
In numerical modeling and general mathematics, a variable whose value changes as a function of another variable, i.e. the latter is first specified and the latter then calculated. The specified variables are called independent variables. Examples of variables that are usually dependent in numerical modeling include velocities, temperatures, and densities, with the independent variables usually being the spatial positions and time, although some variables can be either depending on the situation. For example, when pressure coordinates are used the pressure is an independent variable and the height or depth a dependent one, but when level coordinates are used the positions are reversed.
Industry:Earth science
