In atmospheric models, space-and time-dependent processes are described by :
MH SET - 2018, SET Exam - 2018,
Answer: D
They are described by partial differential equations.
Atmospheric variables such as wind, temperature, pressure and humidity vary in three space dimensions and in time. The governing equations of motion, continuity, thermodynamics and moisture therefore contain derivatives with respect to several independent variables, and are partial differential equations. Numerical models solve them on a grid.
Ordinary differential equations handle a single independent variable, such as time alone. Empirical and statistical equations are used for parametrisations and forecasts, but they are not how the space- and time-dependent dynamics are described.
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