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A New Generic Method for Quantifying the Scale Predictability of the Fractal Atmosphere: Applications to Model Verification
Publisher: American Meteorological Society
Abstract: he authors revisit the issue regarding the predictability of a flow that possesses many scales of motion raised by Lorenz in 1969 and apply the general systems theory developed by Selvam in 1990 to error diagnostics and ...
Improving Ensemble-Based Quantitative Precipitation Forecasts for Topography-Enhanced Typhoon Heavy Rainfall over Taiwan with a Modified Probability-Matching Technique
Publisher: American Meteorological Society
Abstract: n this paper, a modified probability-matching technique is developed for ensemble-based quantitative precipitation forecasts (QPFs) associated with landfalling typhoons over Taiwan. The main features of this technique ...
Calculation of Geopotential and Temperature Fields from an Array of Nearly Continuous Wind Observations
Publisher: American Meteorological Society
Abstract: Observing systems simulation experiments were carried out to estimate the accuracy of temperatures diagnosed from the divergence equation when an army of nearly continuous (in time) wind observations is available. It was ...
A Consistency Condition for Wind-Field Reconstruction in a Limited Area and a Harmonic-Cosine Series Expansion
Publisher: American Meteorological Society
Abstract: This paper examines further the problem of deducing the wind field from vorticity and divergence over a limited area with prescribed winds at the boundary. An earlier work showed that the wind field in a limited area can ...
The Taiwan Area Mesoscale Experiment (TAMEX): An Overview
Publisher: American Meteorological Society
Abstract: The Taiwan Area Mesoscale Experiment (TAMEX) is a research program conducted jointly by scientists of Taiwan, the Republic of China, and the United States to improve, through better understanding, the forecasting of heavy ...
Impact of a Digital Filter as a Weak Constraint in MM5 4DVAR: An Observing System Simulation Experiment
Publisher: American Meteorological Society
Abstract: In this study, a digital filter is introduced into the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5) four-dimensional variational data assimilation (4DVAR) ...
Topographic Effects on a Wintertime Cold Front in Taiwan
Publisher: American Meteorological Society
Abstract: This paper describes an observational and numerical study of an intense wintertime cold front that occurred in Taiwan on 8 January 1996. The front was associated with rope clouds at the leading edge, and a broad area of ...
Assessing the Accuracy of a Linearized Observation Operator for Assimilation of Radio Occultation Data: Case Simulations with a High-Resolution Weather Model
Publisher: American Meteorological Society
Abstract: Assimilation into numerical weather models of the refractivity, Abel-retrieved from radio occultations, as the local refractivity at ray tangent point may result in large errors in the presence of strong horizontal gradients ...
Improved Analyses and Forecasts of Hurricane Ernesto’s Genesis Using Radio Occultation Data in an Ensemble Filter Assimilation System
Publisher: American Meteorological Society
Abstract: adio occultation (RO) refractivity observations provide information about tropospheric water vapor and temperature in all weather conditions. The impact of using RO refractivity observations on analyses and forecasts of ...
Mesoscale Budgets of Heat and Moisture in a Convective System over the Central United States
Publisher: American Meteorological Society
Abstract: The effect midlatitude organized onvection on its environment is diagnosed through the calculation of mesoscale heat and moisture budgets over a region during the 10?11 April 1979 AYE-SESAME case. The noise level or error ...