When talking about lightning, appearances of different lightning which occur along with thunderstorms will emerge in the minds of the people and these lightning
occur in the troposphere.
However, in addition to lightning in the troposphere, there are kinds of lightning discharges which occur above the thunderstorms.
Up to now, lightning discharges above storms include sprite, elves (Emissions of Light and VLF perturbation due to EMP Sources, elves),
Blue jet and Gigantic jet etc, and all of these discharges are totally named as Transient Luminous Events (TLEs).
Gigantic jets were observed in America, Taiwan and Europe regions.
Gigantic jet is sporadic compared with sprite, elves etc. Is there gigantic jet in middle latitude region in mainland China?
A recent study entitled "A gigantic jet event observed over a thunderstorm in mainland China", has been published in Chinese Science Bulletin,
2012, Vol 57(36).
Detailed analysis of the observed gigantic jet and its associated storm were analyzed by using multiple data sets including low-light level observation,
lightning location network, Doppler radar data and infrared weather images. This report was accomplished by the corresponding author Jing Yang,
a research associate from Key Laboratory of
Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences.
Gigantic jet is a kind of large transient discharge which occurs above thunderstorms. It initiates from the thundercloud top and develops upward to the
ionosphere, and connects the thunderstorm and ionosphere directly. Previous studies show that gigantic jet is often observed in tropical or subtropical
regions, sometimes over winter thunderstorms. Is there gigantic jet in middle latitude region in mainland China?
In addition, previous studies show that gigantic jet and sprites often occurred over the same storm. Is there any special case except this?
Duke Researchers capture video of "gigantic jet" lightning 200 miles away off the coast of North Carolina.
A gigantic jet event observed in middle latitude region in mainland China was first reported. The results show that the gigantic jet has tree-like shape,
and the gigantic jet producing storm center located at about 35.6°N, 119.8°E.
Different from other study that sprites and gigantic jets were produced by
the same storm, two different storms produced two types of TLEs, that is, the gigantic jet producing storm produced only one gigantic jet event during its lifetime and five sprites were produced over another storm in this study. Also different from results in other studies that positive CGs dominated during a time period centered
at gigantic jet, negative CGs dominated during a time period centered at the gigantic jet event and during most of the time in storm life in this study.
Have you ever seen a gigantic jet? They are extremely rare but tremendously powerful. Gigantic jets are a newly discovered type of lightning discharge
between some thunderstorms and the Earth's ionosphere high above them. Pictured above is one such jet caught by accident by a meteor camera in Oklahoma, USA.
The gigantic jet, at the lower left, traversed perhaps 70 kilometers in just under one second. Gigantic jets are much different from regular
cloud-to-cloud and cloud-to-ground lightning. The bottoms of gigantic jets appear similar in appearance to another type cloud-to-ionosphere strike
called blue jets, while the tops appear similar to upper-atmosphere red sprites. Although the mechanism and trigger that causes gigantic jets is a topic
of research, it is clear that the jets reduce charge imbalance
between different parts of Earth's atmosphere. A good way to look for gigantic jets is to watch a powerful but distant thunderstorm from a clear location.
Gigantic jet starts from the thundercloud top and propagates upwards to the ionosphere, and it has a direct influence on the ionosphere potential and the electrical environment in the near space. Studies on this kind of discharge will provide an important protection for the space environment.
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Lake In France Turns Red
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