Residual delay maps unveil global patterns of atmospheric nonlinearity and produce improved local forecasts

Residual delay maps unveil global patterns of atmospheric nonlinearity and produce improved local forecasts.

We use residual-delay maps of observational field data for barometric pressure to demonstrate the structure of latitudinal gradients in nonlinearity in the atmosphere. Nonlinearity is weak and largely lacking in tropical and subtropical sites and increases rapidly into the temperate regions where the time series also appear to be much noisier. The degree of nonlinearity closely follows the meri...

Nonlinearity, local and global avalanche characteristics of balanced Boolean functions

For a Boolean function f , define ∆f (α) = ∑ x f̂(x)f̂(x⊕ α), f̂(x) = (−1)f(x), the absolute indicator ∆f = maxα6=0 |∆f (α)|, and the sum-of-squares indicator σf = ∑ α ∆ 2 f (α). We construct a class of functions with good local avalanche characteristics, but bad global avalanche characteristics, namely we show that 22n(1 + p) ≤ σf ≤ 2,∆f = 2n, where p is the number of linear structures (with even...

Statistical modeling of the association between pervasive precipitation anomalies in Southern Alburz and global ocean-atmospheric patterns

Precipitation patterns are influenced by many factors, such as global atmospheric circulations to name but one. Precipitation patterns in Iran have always had great fluctuations even in a smaller scale like the Alburz Mountain Range. The present research has tried to find the relationship between global atmospheric patterns and the pervasive precipitation ones in Alburz. For doing so, 17 climat...

Statistical modeling of the association between pervasive precipitation anomalies in Southern Alburz and global ocean-atmospheric patterns

Precipitation patterns are influenced by many factors, such as global atmospheric circulations to name but one. Precipitation patterns in Iran have always had great fluctuations even in a smaller scale like the Alburz Mountain Range. The present research has tried to find the relationship between global atmospheric patterns and the pervasive precipitation ones in Alburz. For doing so, 17 climat...

An improved global zenith tropospheric delay model