Computationally cheap “statistical” methods of lowering this quantity include bias-correction spatial disaggregation, and are contrasted with more costly "dynamical" methods. In a mathematical analysis named for this quantity, it must lie within a specific range for pressure gradient and gravity to be the only non-negligible terms in the vertical momentum equation, thus justifying the geostrophic approximation. In GCMs, phenomena for which this quantity is "subgrid" are typically parametrized. (15[2])Convective (*) complexes are an example of a convective system named for a specific range of values of this quantity. Cyclones and fronts are examples of phenomena (10[1])for which this (-5[1])quantity is described as "synoptic," which indicates that this quantity (10[3])is on the order of 1000 kilometers. For (10[1])10 points, name this quantity, (10[1])the order of magnitude of distance (-5[1])along which a physical (10[2]-5[1])phenomenon occurs. (10[2]) (10[5]0[3])■END■