منابع مشابه
Tornadoes and Tornadic Storms: A Review of Conceptual Models
Our ability to make distinctions among tornadic storm types and among tornadoes has been affected by three important developments since the last Tornado Symposium: (1) high-resolution Doppler radar observations, (2) extensive visual observations by storm intercept teams, and (3) detailed 3-D numerical cloud models. The definition and classification of convective vortices and the storms which pr...
متن کاملMagnetic Structure of Sunspots
In this review we give an overview about the current state-of-knowledge of the magnetic field in sunspots from an observational point of view. We start by offering a brief description of tools that are most commonly employed to infer the magnetic field in the solar atmosphere with emphasis in the photosphere of sunspots. We then address separately the global and local magnetic structure of suns...
متن کاملPrevention of destructive tropical and extratropical storms , hurricanes , tornadoes , dangerous thunderstorms , and catastrophic
Tropical cyclones and storms, hurricanes, powerful thunderclouds, which generate tornadoes, destructive ex-tratropical cyclones, which result in catastrophic floods, are the powerful cloud systems that contain huge amount of water. According to the hypothesis argued in this paper, an electric field coupled with powerful clouds and electric forces play a cardinal role in supporting this huge mas...
متن کاملInvisible sunspots and rate of solar magnetic flux emergence
Aims. We study the visibility of sunspots and its influence on observed values of sunspot region parameters. Methods. We use Virtual Observatory tools provided by AstroGrid to analyse a sample of 6862 sunspot regions. By studying the distributions of locations where sunspots were first and last observed on the solar disk, we derive the visibility function of sunspots, the rate of magnetic flux ...
متن کاملTweeting and tornadoes
Social Media and micro-blogging is being used during crisis events to provide live up-to-date information as events evolve (before, during and after). Messages are posted by citizens or public officials. To understand the effectiveness of these messages, we examined the content of geo-located Twitter messages (“tweets”) sent during the Moore, Oklahoma tornado of May 20, 2013 (+/-1day) to explor...
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ژورنال
عنوان ژورنال: Science
سال: 1890
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-15.379.291