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RISIdentifying a Barotropic Growth Mechanism in East Pacific Tropical Cyclogenesis Using Adjoint-Derived Sensitivity Gradients
Publisher: American Meteorological Society
Abstract: he eastern Pacific tropical cyclone basin is typified by a low-level westerly jet with the main development region residing on its northern, cyclonic-shear side. The persistent meridional shear of the zonal flow associated ...
Validation of a Tropical Cyclone Steering Response Function with a Barotropic Adjoint Model
Publisher: American Meteorological Society
Abstract: The steering of a tropical cyclone (TC) vortex is commonly understood as the advection of the TC vortex by an ?environmental wind.? In past studies, the environmental steering wind vector has been defined by the horizontal ...
Dynamical Sensitivity Analysis of Tropical Cyclone Steering Using an Adjoint Model
Publisher: American Meteorological Society
Abstract: hrough the use of an adjoint model, the sensitivity of the steering of a simulated tropical cyclone (TC) to various aspects of a model forecast trajectory can be calculated. This calculation, providing a priori information ...
Adjoint-Derived Impact of Assimilated Observations on Tropical Cyclone Intensity Forecasts of Hurricane Joaquin (2015) and Hurricane Matthew (2016)
Publisher: American Meteorological Society
Abstract: The adjoint-derived observation impact method is used as a diagnostic to derive the impact of assimilated observations on a metric representing the forecast intensity of a tropical cyclone (TC). Storm-centered composites ...
Physical Mechanisms Underlying Selected Adaptive Sampling Techniques for Tropical Cyclones
Publisher: American Meteorological Society
Abstract: o efficiently and effectively prioritize resources, adaptive observations can be targeted by using some objective criteria to estimate the potential impact an initial condition perturbation (or analysis increment) in a ...
Effect of Enhanced Satellite-Derived Atmospheric Motion Vectors on Numerical Weather Prediction in East Asia Using an Adjoint-Based Observation Impact Method
Publisher: American Meteorological Society
Abstract: hen producing forecasts by integrating a numerical weather prediction model from an analysis, not all observations assimilated into the analysis improve the forecast. Therefore, the impact of particular observations on the ...
Untitled
Publisher: American Meteorological Society
Abstract: AbstractAutomated aircraft observations of wind and temperature have demonstrated positive impact on numerical weather prediction since the mid-1980s. With the advent of the Water Vapor Sensing System (WVSS-II) humidity ...
High-Latitude Atmospheric Motion Vectors from Composite Satellite Data
Publisher: American Meteorological Society
Abstract: tmospheric motion vectors (AMVs) are derived from satellite-observed motions of clouds and water vapor features. They provide crucial information in regions void of conventional observations and contribute to forecaster ...
S4: An O2R/R2O Infrastructure for Optimizing Satellite Data Utilization in NOAA Numerical Modeling Systems: A Step Toward Bridging the Gap between Research and Operations
Publisher: American Meteorological Society
Abstract: n 2011, the National Oceanic and Atmospheric Administration (NOAA) began a cooperative initiative with the academic community to help address a vexing issue that has long been known as a disconnection between the operational ...