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RISA 5-yr 40-km-Resolution Global Climatology of Superrefraction for Ground-Based Weather Radars
Publisher: American Meteorological Society
Abstract: The propagation of electromagnetic waves emitted from ground-based meteorological radars is determined by the stratification of the atmosphere. In extreme superrefractive situations characterized by strong temperature ...
The Inclusion of 3D Prognostic Cloud and Precipitation Variables in Adjoint Calculations
Publisher: American Meteorological Society
Abstract: The potential of the inclusion of two prognostic variables for cloud condensate and precipitation content in adjoint calculations has been investigated in the framework of Météo-France's operational spectral global model, ...
Cloud and Precipitation Parameterizations in Modeling and Variational Data Assimilation: A Review
Publisher: American Meteorological Society
Abstract: This paper first reviews the current status, issues, and limitations of the parameterizations of atmospheric large-scale and convective moist processes that are used in numerical weather prediction and climate general ...
A Lightning Parameterization for the ECMWF Integrated Forecasting System
Publisher: American Meteorological Society
Abstract: new parameterization able to diagnose lightning flash densities is proposed for the ECMWF Integrated Forecasting System, including its tangent-linear and adjoint versions. Total lightning densities are expressed as a ...
Direct 4D-Var Assimilation of NCEP Stage IV Radar and Gauge Precipitation Data at ECMWF
Publisher: American Meteorological Society
Abstract: irect four-dimensional variational data assimilation (4D-Var) of NCEP stage IV radar and gauge precipitation observations over the eastern United States has been developed and tested in ECMWF?s global Integrated Forecasting ...
Experimental 4D-Var Assimilation of SYNOP Rain Gauge Data at ECMWF
Publisher: American Meteorological Society
Abstract: our-dimensional variational data assimilation (4D-Var) experiments with 6-hourly rain gauge accumulations observed at synoptic stations (SYNOP) around the globe have been run over several months, both at high resolution ...
Validating the Past: Simulating the Weather in Space Mission Earth Views
Publisher: American Meteorological Society
“1D+4DVAR” Assimilation of NCEP Stage-IV Radar and Gauge Hourly Precipitation Data at ECMWF
Publisher: American Meteorological Society
Abstract: The one- plus four-dimensional variational data assimilation (?1D+4DVAR?) method currently run in operations at ECMWF with rain-affected radiances from the Special Sensor Microwave Imager is used to study the potential ...
Representing Equilibrium and Nonequilibrium Convection in Large-Scale Models
Publisher: American Meteorological Society
Abstract: new diagnostic convective closure, which is dependent on convective available potential energy (CAPE), is derived under the quasi-equilibrium assumption for the free troposphere subject to boundary layer forcing. The closure ...
Assimilation and Modeling of the Atmospheric Hydrological Cycle in the ECMWF Forecasting System
Publisher: American Meteorological Society
Abstract: Several new types of satellite instrument will provide improved measurements of Earth's hydrological cycle and the humidity of the atmosphere. In an effort to make the best possible use of these data, the modeling and ...