Sentences with phrase «noise process»

The dominant temporal variability of the leading EOF mode for annual precipitation can essentially be described as a white noise process.

However, not all aspects of the time series of the annular modes are consistent with a red - noise process with a 10 day timescale: e.g., the annular modes exhibit enhanced variability on monthly timescales during seasons of rigorous stratosphere / troposphere coupling (see section on Stratosphere / troposphere coupling, below); and both annular modes have exhibited trends over the past few decades towards their high index polarities (see section on Climate Change, below).

That's why everyone does significance testing — which is the issue that M&M were addressing, not that MBH98 detected a «significant» correlation between a stationary noise process and a non-stationary deterministic signal, but that the chance of the algorithm doing so was underestimated.

Researchers from the Physikalisch - Technische Bundesanstalt (PTB) have thoroughly analyzed the noise processes in their optical lattice clock with neutral strontium atoms.

Yellow and red regions indicate higher degrees of variance, and the black line surrounds regions of variance that exceed the 99.98 % confidence level for a red noise process (at 4 — 8 - yr period, the regions of significant variance are shown black rather than outlined).

Nick Stokes - As per Foster and Rahmstorf 2011, the noise process is computed as ARMA (1, 1), not AR (n), as a simple autoregressive model turns out to underestimate autocorrelation in the temperature data.

The current approach that is generally pursued assumes essentially that past climate variability is indistinguishable from a stochastic red - noise process (Hasselmann, 1976), whose only regularities are those of periodic external forcing (Mitchell, 1976).