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RISOptimal Fingerprints for the Detection of Time-dependent Climate Change
Publisher: American Meteorological Society
Abstract: An optimal linear filter (fingerprint) is derived for the detection of a given time-dependent, multivariate climate change signal in the presence of natural climate variability noise. Application of the fingerprint to the ...
On the Existence of a Fully Developed Wind-Sea Spectrum
Publisher: American Meteorological Society
Abstract: We consider the energy transfer equation for well-developed ocean waves under the influence of wind, and study the conditions for the existence of an equilibrium solution in which wind input, wave-wave interaction and ...
Extraction of Mixed Layer Advection Velocities, Diffusion Coefficients, Feedback Factors and Atmospheric Forcing Parameters from the Statistical Analysis of North Pacific SST Anomaly Fields
Publisher: American Meteorological Society
Abstract: The statistical properties of observed North Pacific sea surface temperature (SST) anomalies are simulated by a simple mixed layer advection and diffusion model with stabilizing feedback and local stochastic forcing by the ...
The Horizontal Diffusion of Tracers by Surface Waves
Publisher: American Meteorological Society
Abstract: The horizontal dispersion of tracers in the presence of a random field of ocean surface waves is examined. Random fluctuations in the local Stokes-drift current cause a water particle to follow a random-walk path. The ...
Computations and Parameterizations of the Nonlinear Energy Transfer in a Gravity-Wave Spectrum. Part I: A New Method for Efficient Computations of the Exact Nonlinear Transfer Integral
Publisher: American Meteorological Society
Abstract: A more efficient method of computing the nonlinear transfer in a surface wave spectrum is developed which is symmetrical with respect to all wavenumbers of the resonant interaction quadruplets. This enables a large number ...
Techniques of Linear Prediction for Systems with Periodic Statistics
Publisher: American Meteorological Society
Abstract: Many parameters that measure climatic variability have nonstationary statistics, that is, they depend strongly on the phase of the annual cycle. In this case normal statistical analysis techniques based on time-invariant ...
Stochastic Dynamic Analysis of Polar Sea Ice Variability
Publisher: American Meteorological Society
Abstract: The analysis of Arctic (1966?76) and Antarctic (1973?79) sea ice data is presented, and a dynamical model based on white noise atmospheric forcing, local stabilizing relaxation and lateral diffusion and advection is ...
Computations of the Response of a Wave Spectrum to a Sudden Change in Wind Direction
Publisher: American Meteorological Society
Abstract: The response of a wind-sea spectrum to a step function change in wind direction is investigated theoretically for a sequence of direction changes ranging from 30° to 180°, in increments of 30°. Two spectral energy balance ...
Computations and Parameterizations of the Nonlinear Energy Transfer in a Gravity-Wave Specturm. Part II: Parameterizations of the Nonlinear Energy Transfer for Application in Wave Models
Publisher: American Meteorological Society
Abstract: Four different parameterizations of the nonlinear energy transfer Snl in a surface wave spectrum are in investigated. Two parameterizations are based on a relatively small number of parameters and are useful primarily for ...