Journal ArticleDOI
A Fractional Approach to the Factor Separation Method
S. O. Krichak,Pinhas Alpert +1 more
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In this paper, a fractional study of the factor separation approach is performed based on the simulations of an eastern Mediterranean weather development during 1−2 November 1994, performed with the Florida State University global spectral model.Abstract:
A fractional study of the factor separation (FS) approach is performed. A fractional version of the FS method is discussed. The revised approach allows a determination of role of the acting physical mechanisms as well as that of potential nonlinearity of the modeling system responses. Application of the approach is demonstrated based on the simulations of an eastern Mediterranean weather development during 1‐2 November 1994, performed with the Florida State University global spectral model. Thirteen model simulations with varying intensity of the turbulent surface fluxes in the runs were performed for the analysis. Two locations selected for sensitivity analysis of the model results represent the processes over the Red Sea and the Mediterranean Sea. It is shown that the variation of the FS results obtained in the experiments with different intensity of factors may be in some cases significant. The degree of variability of the FS results obtained in the experiments with varying intensity of the factors under the analysis provides useful information on sufficiency (or insufficiency) of available simulation results for an improved evaluation of the role of the acting factors in a meteorological process.read more
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Connections between Potential Vorticity Intrusions and Convection in the Eastern Tropical Pacific
TL;DR: In this article, the connections between intrusions of stratospheric air into the upper troposphere and deep convection in the tropical eastern Pacific are examined using a combination of data analysis, potential vorticity (PV) inversion, and numerical simulations.
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Development mechanisms of an explosive cyclone over East Sea on 3–4 April 2012
Ki-Young Heo,Ye-Won Seo,Kyung-Ja Ha,Kwang-Soon Park,Jinah Kim,Jung-Woon Choi,Ki-Cheon Jun,Jin-Yong Jeong +7 more
TL;DR: In this paper, the development mechanisms of the explosive cyclone that occurred during 3-4 April 2012 over East Sea (Sea of Japan) are examined through numerical simulation and sensitivity experiments using the Weather and Research Forecasting (WRF) model.
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Numerical investigation with a coupled single-column lake-atmosphere model: using the Alpert–Stein factor separation methodology to assess the sensitivity of surface interactions
TL;DR: A coupled single-column atmosphere-lake model, along with the Stein-Alpert factor separation methodology, is used to explore some of the non-linear interactions in the vertical dimension between the lower atmosphere and the deep-Lake Geneva, Switzerland, during three selected periods in 1990.
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Factor Effects in Numerical Simulations
TL;DR: This work presents a new approach to numerical simulations that allows for real-time adjustment of factor settings in experimental runs to understand how changes in those factors affect the output.
Journal ArticleDOI
Impacts of spatiotemporally uneven urbanization on sea breeze fronts in a mega-river delta
TL;DR: Wang et al. as mentioned in this paper used sensitivity experiments to examine the 1990, 2005, and 2016 sea breeze front (SBF) scenarios from Shanghai, China and found that maximum SBF inland penetration distances followed a temporally uneven reduction pattern, with rapid rates of reduction between 1990 and 2005 (4.1-6.3
References
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Journal Article
Role of sea fluxes and topography in eastern Mediterranean cyclogenesis
TL;DR: In this paper, four typica Eastern Mediterranean (EM) winter cyclones were simulated, using the NCAR/PSU numerical mesoscale model, and a sensitivity study was carried out to isolate the effects of topography and surface fluxes on the Cyprus Low development.
Journal ArticleDOI
Coastal effects in the Eastern Mediterranean as seen from experiments using a cloud ensemble model with detailed description of warm and ice microphysical processes
TL;DR: In this paper, the authors used a 2D cloud ensemble model with a relatively high resolution (1.5 km) of the finite-difference grid to investigate the coastal effects on cloud generation and convective type precipitation during the cold season in the Eastern Mediterranean.
Journal ArticleDOI
The Relative Roles of Lateral Boundaries, Initial Conditions, and Topography in Mesoscale Simulations of Lee Cyclogenesis
TL;DR: In this paper, the contributions of boundary factors, which may be considered to be independent of the physics or the dynamics of the mesoscale model, are explored in a consistent approach for a widely investigated Alpine Experiment (AL-PEX) lee cyclogenesis case.
Journal ArticleDOI
Numerical Simulation of an Industrial Cumulus Affected by Heat, Moisture, and CCN Released from an Oil Refinery
S. Guan,G. W. Reuter +1 more
TL;DR: In this article, the relative contributions of three factors on cloud development in calm wind conditions using an axisymmetric cloud model were derived, and the mutual-interactive contributions of two or three of the factors were also computed.