Search
CSV
RISDrag Reducing Flows in Laminar Turbulent Transition Region
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study makes an attempt to investigate Newtonian/nonNewtonian pipe flows in a laminarturbulent transition region, which is an extraordinarily complicated process and is not fully understood. The key characteristic of ...
The Impact of Ocean Data Assimilation on Seasonal-to-Interannual Forecasts: A Case Study of the 2006 El Niño Event
Publisher: American Meteorological Society
Abstract: This study investigates the impact of four different ocean analyses on coupled forecasts of the 2006 El Niño event. Forecasts initialized in June 2006 using ocean analyses from an assimilation that uses flow-dependent ...
Handling Nonlinearity in an Ensemble Kalman Filter: Experiments with the Three-Variable Lorenz Model
Publisher: American Meteorological Society
Abstract: n ensemble Kalman filter (EnKF) is optimal only for linear models because it assumes Gaussian distributions. A new type of outer loop, different from the one used in 3D and 4D variational data assimilation (Var), is proposed ...
Accelerating the EnKF Spinup for Typhoon Assimilation and Prediction
Publisher: American Meteorological Society
Abstract: mesoscale ensemble Kalman filter (EnKF) for a regional model is often initialized from global analysis products and with initial ensemble perturbations constructed based on the background error covariance used in the ...
Application of Coupled Bred Vectors to Seasonal-to-Interannual Forecasting and Ocean Data Assimilation
Publisher: American Meteorological Society
Abstract: Coupled bred vectors (BVs) generated from the NASA Global Modeling and Assimilation Office (GMAO) coupled general circulation model are designed to capture the uncertainties related to slowly varying coupled instabilities. ...
Bred Vectors and Tropical Pacific Forecast Errors in the NASA Coupled General Circulation Model
Publisher: American Meteorological Society
Abstract: The breeding method has been implemented in the NASA Global Modeling and Assimilation Office coupled general circulation model (CGCM) in its operational configuration in which ocean data assimilation is used to initialize ...
Machine Learning Approach to Decomposing Arterial Travel Time Using a Hidden Markov Model with Genetic Algorithm
Publisher: American Society of Civil Engineers
Abstract: Bluetooth-based traffic detection is an emerging travel time collection technique; however, its use on arterials has been limited due to several challenges. In particular, data missing not at random (MNAR) is a common data ...
Laboratory Research on the Properties of Warm Amorphous Poly Alpha Olefin–Modified Asphalt Mixture Using Sasobit and Deurex
Publisher: American Society of Civil Engineers
Abstract: The purpose of this study was to investigate the effects of warm mix additive Sasobit and Deurex on the properties of amorphous poly alpha olefin (APAO) modified asphalt (AMB) mixture. Marshall stability (MS) and indirect ...
Process-Based Evaluation of Stochastic Perturbed Microphysics Parameterization Tendencies on Ensemble Forecasts of Heavy Rainfall Events
Publisher: American Meteorological Society
Reducing TC Position Uncertainty in an Ensemble Data Assimilation and Prediction System: A Case Study of Typhoon Fanapi (2010)
Publisher: American Meteorological Society
Abstract: AbstractEnsemble-based data assimilation (EDA) has been used for tropical cyclone (TC) analysis and prediction with some success. However, the TC position spread determines the structure of the TC-related background error ...