Search
CSV
RISTwo-Dimensional Continuous Wavelet Analysis and Its Application to Meteorological Data
Publisher: American Meteorological Society
Abstract: The two-dimensional continuous wavelet transform (2D CWT) has become an important tool to examine and diagnose nonstationary datasets on the plane. Compared with traditional spectral analysis methods, the 2D CWT provides ...
Spatial Computational Modes in the Centered Finite-Differencing Schemes
Publisher: American Meteorological Society
Abstract: The computational modes associated with a centered finite-differencing scheme in space are studied. The existence and impact of these computational modes in a numerical solution are demonstrated with the use of theoretical ...
Free Waves on Barotropic Vortices. Part I: Eigenmode Structure
Publisher: American Meteorological Society
Abstract: To understand the nature of coupling between a hurricane vortex and asymmetries in its near-core region, it is first necessary to have an understanding of the spectrum of free waves on barotropic vortices. As foundation ...
Four-Dimensional Variational Data Assimilation for Limited-Area Models: Lateral Boundary Conditions, Solution Uniqueness, and Numerical Convergence
Publisher: American Meteorological Society
Abstract: Mathematical issues arising when applying four-dimensional variational (4DVAR) data assimilation to limited-area problems are studied. The derivation of the adjoint system for the initial-boundary value problem for a general ...
Discontinuous Forcing Generating Rough Initial Conditions in 4DVAR Data Assimilation
Publisher: American Meteorological Society
Abstract: The impact of discontinuous model forcing on the initial conditions obtained from 4DVAR data assimilation is studied with mathematic analyses, idealized numerical examples, and more realistic meteorological cases. The ...
Rossby Wave Ray Tracing in a Barotropic Divergent Atmosphere
Publisher: American Meteorological Society
Abstract: The effects of divergence on low-frequency Rossby wave propagation are examined by using the two-dimensional Wentzel?Kramers?Brillouin (WKB) method and ray tracing in the framework of a linear barotropic dynamic system. ...
Interaction of Upper-Tropospheric Turbulence and Gravity Waves as Obtained from Spectral and Structure Function Analyses
Publisher: American Meteorological Society
Abstract: Spectral and structure function analyses of horizontal velocity fields observed in the upper troposphere and lower stratosphere during the Severe Clear Air Turbulence Collides with Air Traffic (SCATCAT) field program, ...
Variability and Trends of High Temperature, High Humidity, and Sultry Weather in the Warm Season in China during the Period 1961–2004
Publisher: American Meteorological Society
Abstract: Using the daily maximum air temperature and mean humidity observations at 394 surface weather stations across China, the changes in the annual number of days of high temperature weather (HTW), high humidity weather (HHW), ...
Impact of Formulation of Cost Function and Constraints on Three-Dimensional Variational Data Assimilation
Publisher: American Meteorological Society
Abstract: Three-dimensional variational data assimilation (3DVAR) analysis is an important method used at many operational and research institutes in meteorology, for example, the National Centers for Environmental Prediction (NCEP) ...
The Dynamic and Thermodynamic Structures Associated with a Series of Heavy Precipitation Events over China during January 2008
Publisher: American Meteorological Society
Abstract: In the winter of 2008, China experienced once-in-50-yr (or once in 100 yr for some regions) snow and ice storms. These storms brought huge socio economical impacts upon the Chinese people and government. Although the storms ...