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RISRainfall Assimilation through an Optimal Control of Initial and Boundary Conditions in a Limited-Area Mesoscale Model
Publisher: American Meteorological Society
Abstract: To assess the impact of rainfall observations on short-range forecasts of precipitation, and to improve our understanding of the physical processes responsible for the development of a mesoscale convective system (MCS) ...
Incorporating the SSM/I-Derived Precipitable Water and Rainfall Rate into a Numerical Model: A Case Study for the ERICA IOP-4 Cyclone
Publisher: American Meteorological Society
Abstract: In this paper, a variational data assimilation approach is used to assimilate the rain rate (RR) data together with precipitable water (PW) measurements from the Experiment on Rapidly Intensifying Cyclones over the Atlantic ...
Evaluation of a Linear Phase Observation Operator with CHAMP Radio Occultation Data and High-Resolution Regional Analysis
Publisher: American Meteorological Society
Abstract: In this study a nonlocal, linear observation operator for assimilating radio occultation data is evaluated. The operator consists of modeling the excess phase, that is, integrating the refractivity along straight lines ...
COSMIC GPS Radio Occultation Temperature Profiles in Clouds
Publisher: American Meteorological Society
Abstract: Thermodynamic states in clouds are closely related to physical processes such as phase changes of water and longwave and shortwave radiation. Global Positioning System (GPS) radio occultation (RO) data are not affected by ...
Assimilation of Atmospheric Radio Refractivity Using a Nonhydrostatic Adjoint Model
Publisher: American Meteorological Society
Abstract: Recently, a new approach to remote sensing of water vapor based on the Global Positioning System (GPS) has been proposed. Specifically, the bending of radio signals propagating from GPS satellites to a receiver on a low ...
Medium-Range Prediction of an Extratropical Oceanic Cyclone: Impact of Initial State
Publisher: American Meteorological Society
Abstract: Significant progress has been made in the short-range (1?2 days) prediction of east coast cyclogenesis over the past decade. This is the result of improved model resolution, physical parameterization, and good analysis of ...
Variational Assimilation of Precipitable Water Using a Nonhydrostatic Mesoscale Adjoint Model. Part I: Moisture Retrieval and Sensitivity Experiments
Publisher: American Meteorological Society
Abstract: Recently it has been proposed that the phase delay associated with the radio signals propagating from GPS satellites to a ground-based GPS receiving station can be used to infer the vertically integrated water vapor ...
Four-Dimensional Variational Data Assimilation of Heterogeneous Mesoscale Observations for a Strong Convective Case
Publisher: American Meteorological Society
Abstract: On 19 September 1996, a squall line stretching from Nebraska to Texas with intense embedded convection moved eastward across the Kansas?Oklahoma area, where special observations were taken as part of a Water Vapor Intensive ...
Assessing the Impact of Simulated COSMIC GPS Radio Occultation Data on Weather Analysis over the Antarctic: A Case Study
Publisher: American Meteorological Society
Abstract: The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission was launched in April 2006. As part of its mission, COSMIC will provide approximately 2500?3000 global positioning system (GPS) ...
Estimating Atmospheric Boundary Layer Depth Using COSMIC Radio Occultation Data
Publisher: American Meteorological Society
Abstract: his study presents an algorithm for estimating atmospheric boundary layer (ABL) depth from Global Positioning System (GPS) radio occultation (RO) data. The algorithm is applied to the Constellation Observing System for ...