Results 101 to 110 of about 61,921 (204)
Axisymmetric Tornado Simulations with a Semi-Slip Boundary
Fluids, 2017 The structure of natural tornadoes and simulated analogs are sensitive to the lower boundary condition for friction. Three-dimensional numerical simulations of storms require a choice for turbulence parameterizations and resolution of wind near the lower
Brian H. Fiedler
doaj +1 more source
An analytical model of tornado generation [PDF]
Physics of Fluids, Vol. 36, Issue 8, 086607 (2024)A new analytical model for the generation of axisymmetric tornado-type vortices has been developed. A solution to the nonlinear equation for the stream function in an unstable stratified atmosphere is obtained and analyzed within the framework of ideal hydrodynamics.
arxiv +1 more source
Observations of Severe Local Storms and Tornadoes with the Atmospheric Imaging Radar
, 2015 Mobile radar platforms designed for observation of severe local storms have consistently pushed the boundaries of spatial and temporal resolution in order to allow for detailed analysis of storm structure and evolution.
J. Kurdzo +8 more
semanticscholar +1 more source
Double Impact: When Both Tornadoes and Flash Floods Threaten the Same Place at the Same Time
, 2015 While both tornadoes and flash floods individually present public hazards, when the two threats are both concurrent and collocated (referred to here as TORFF events), unique concerns arise.
E. Nielsen +4 more
semanticscholar +1 more source
A buoyant tornado-probe concept incorporating an inverted lifting device [PDF]
Addition of an inverted lifting device to a simple balloon probe is shown to make possible low-altitude entry to tornado cores with easier launch conditions than for the simple balloon probe.
Grant, F. C.
core +1 more source
, 2017 In this paper, we extend the formal definition of topological surgery by introducing new notions in order to model natural phenomena exhibiting it. On the one hand, the common features of the presented natural processes are captured by our schematic ...
A Ranicki, D Rolfsen, SA Wasserman
core +1 more source
AtmosphereStudies have analyzed U.S. tornado variability and correlated F1–F5 tornado occurrence with various natural climate oscillations and anthropogenic factors. Using a relatively new empirical mode decommission (EMD) method that extracts time-frequency modes
Zaitao Pan
doaj +1 more source
Meteorologische Zeitschrift, 2000 Die vor wenigen Jahren wiederentdeckten Richtlinien Johannes Letzmanns zur Trombenbeobachtung, -erfassung und -klimatologie von 1937, ihrer Zeit um mehrere Jahrzehnte voraus, werden im Kontext der heutigen Tornadoforschung bewertet.
Nikolai Dotzek +2 more
doaj +1 more source
Iowa Crop and Weather Report, March 28, 2011, Vol. 11. no. 4 [PDF]
, 2011 Report produced by the The Department of Agriculture and Land Stewardship, Climatology Bureau. Iowa Secretary of Agriculture Bill Northey today commented on the Iowa Crops and Weather report released by the USDA National Agricultural Statistical Service.
core
Constructing an efficient machine learning model for tornado prediction [PDF]
arXiv, 2018 Tornado prediction methods and main mechanisms of tornado genesis were analyzed. A model, based on the superposition principle, has been built. For efficiency evaluation, the constructed model has been tested on real-life data obtained from the University of Oklahoma (USA).
arxiv