Weather disturbancesby the cause of Global warming are the less fascinating. Some are more explicable than others, but all are witness to the often breathtaking nature. Here are the ten strangest weather events that show what happens when nature wants to amaze us with his power.
10. St. Elmo’s Fire. Throughout history, countless sailors have claimed to witness the emergence of these glowing tongues of fire that “danced” on the masts and rigging ends of the vessels in some severe storms. These balls of light, known as St. Elmo’s Fire, there are nothing but electric shocks that occur during these storms and have targeted the higher objects of a boat.
Although St. Elmo’s Fire is not dangerous in itself, despite its spectacular, often serves as notice of the imminent fall of lightning on the boats, so that once was considered a bad omen by sailors.
9. Katabatic winds. It is a wind that blows downward component (down), geographically speaking, hills, mountains or glaciers.
The katabatic wind originates from a cooling radiatively or through vertical movements of air at the top of a mountain glacier or mountain. As the density of air increases with decreasing temperature, the air will flow downwards by adiabatically heated as it descends but continues to remain relatively cool.
Katabatic cold winds occur in the early hours of the night when solar radiation ceases and the ground cools by emission of infrared radiation. The cold air of a storm can contribute to this effect.
Over Antarctica and Greenland, huge katabatic winds blow cold all year
8. Aurora Borealis. It is a phenomenon in the form of brightness or luminance that appears in the night sky, usually in polar areas, but may appear elsewhere in the world for short periods of time.
It occurs when charged particles (protons and electrons) are guided by the Earth’s magnetic field and affect the atmosphere near the poles. When these particles collide with atoms and molecules of oxygen and nitrogen, which constitute the most abundant components of air, part of the collision energy to excite atoms such energy levels such that when return energize the energy as visible light of various colors.
Auroras have forms very different structures and colors also change rapidly with time. During one night, the aurora may begin as a very long bow isolated that is spreading on the horizon, generally in an east-west. Around midnight, the arc may start to increase its brightness. Begin to form waves or curls along the arc and vertical structures that resemble light rays very elongated and thin. Suddenly the whole sky can be filled with bands, spirals, and rays of light tremble and move rapidly from horizon to horizon. The activity can last from a few minutes to hours. As dawn approaches the whole process seems calm and only small areas of the sky appear bright until morning comes. Although he described a typical night of auroras, we can find many variations on the same subject.
7. Swirls of Fire. In this phenomenon, the fire under certain conditions (dependent on air temperature and currents), acquires a vertical vorticity forms a vortex or a column of vertically oriented air like a tornado.
Most of the largest fire tornadoes come from forest fires which are present rising warm air currents and convergent. Usually have 10 to 50 feet high, a few meters wide and last only a few minutes. However, some may have more than one kilometer high, contain winds in excess of 160km/hy persist for more than 20 minutes.
An example of the effects it can have a phenomena of this kind happened in 1923 during the Great Kanto earthquake, which caused a firestorm on the size of a city and produced a whirlwind of fire that killed 38,000 people in fifteen minutes Hifukusho-Ato region of Tokyo.
6. Elves and Blue Jets. These strange glow were observed repeatedly by stratospheric aircraft pilots and were classified initially as UFOs. Later, Scientific and finally identified group were given the name of “Transient Luminous Events” (Transient Luminous Events or TLE).
The “elves” (sprites) are electrical discharges that emit a red light and occur at an altitude of 80 kilometers. Their “cousins”, the “blue jets” (blue jets) are blue light cones that form at lower altitudes than sprites, sometimes at the same time as the first. These events typically last only fractions of a second and are being studied by scientists to discover the precise reasons for its formation.
5. Rain of Frogs. Although also other fish and amphibians, but the best known and most common are frogs. The explanation to this puzzle lies in the waterspouts, which absorb large amounts of water from rivers, lakes and seas, also dragged a considerable number of small animals are then thrown several kilometers away from their place of origin, although it is true that in most of cases the animals survive the fall.
4. Snow Donuts. Snow rings are a curious meteorological phenomenon that causes it snow cylindrical, known as “rolls of snow” or as we call in Sobrelistas “Snow Donuts.” Sometimes have a hole in the inner layers because these layers are thinner than the outer and easily fade, giving the cylinder a thread form. Can rarely be seen, because the precise conditions necessary for their training. The size of the cylinders can reach several centimeters, have come to be seen rolls of 60 cm in diameter, although most are about 30 or 40 cm. It is believed that most snow rolls are formed on the plains of North America, where the climate can change abruptly due to the convergence of air masses of Arctic cold and dry, with warm, moist air from the Gulf of Mexico.
For the formation of cylinders should be given conditions: a layer of ice that covered by a blanket of “snow dust” wet about 2 cm. thick, the temperature is close to the melting point of ice and air temperature is maintained at or slightly above the freezing point (between 0 and 1 ° C) and the wind is strong enough to move the rolls snow, but not too much to undo, about 40 km / h.
3. Giant hail. Hail storms are frequent and unwanted weather events, but often times there has been given the fell of huge chunks of ice from the sky, much larger and heavier than common hail. The largest block of ice on record, measured 17.8 centimeters meters in diameter, almost twice the size of a tennis ball. What is much more strange to them yet, is that many of these giant blocks of ice tend to fall seemingly out of nowhere, with no storm clouds in sight. While some speculate that it may be ice floes from planes flying at high altitudes to them yet has not made any concrete and demonstrable explanation for this mysterious phenomenon.
Spain was famous in the famous shower of “meteors” that occurred in 2000, falling throughout the country these giant blocks of ice, although it was shown later that most of them were a real fraud .
2. Supercell. It is a huge rotating thunderstorm. It can last several hours as a single entity. These storms are most likely to produce long-lasting tornadoes and pieces of hail the size of an orange.
The supercells tend to form under conditions of high volatility, and strong winds at high altitudes. Also present a more organized internal circulation which make them have a much longer duration than others. In the supercell is common the appearance of strong currents which make rotational potentially the most dangerous types of convective storm. They can produce high winds, large hail and tornadoes length on a wide path.
1. Waves in Heaven. The wave pattern of a gravity wave seems a strange spectacle, especially if you’re more used to seeing the ripples in the water, not in heaven. This phenomenon rarely seen is caused when air is displaced in the vertical plane, usually as a result of updrafts coming from the mountains or during thunderstorms.
A wave pattern is generated only when the updraft of air is forced into a stable air bag. The upward momentum of the air bag is the trigger for the cause of changes in the atmosphere, altering the dynamics of fluids. The Nature then try to restore fluid changes within the atmosphere, which have an oscillating pattern visible within the cloud.