Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Is there gigantic jet event in middle latitude region in mainland China?

11.02.2013
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?


This images shows: (a) Observed gigantic jet in this paper; (b) Gigantic jet producing storm A and five sprite producing storm B. The two yellow lines represent the range of the line-of-sight extending from the observation site, that is, the camera field of view (FOV). The pink line is the gigantic jet azimuth in the camera FOV.

Credit: ©Science China Press

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Ca 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?

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.

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.

Contact: Yang Jing
E-mail: yangj@mail.iap.ac.cn
See the article: YANG Jing, FENG Guili. A gigantic jet event observed over a thunderstorm in mainland China. Chinese Science Bulletin, 2012, 57(36): 4791-4800.

http://csb.scichina.com:8080/kxtbe/EN/abstract/abstract507387.shtml

Science China Press Co., Ltd. (SCP) is a scientific journal publishing company of the Chinese Academy of Sciences (CAS). For 50 years, SCP takes its mission to present to the world the best achievements by Chinese scientists on various fields of natural sciences researches. http://www.scichina.com/

Yan Bei | EurekAlert!
Further information:
http://www.scichina.org

More articles from Earth Sciences:

nachricht Sediment from Himalayas may have made 2004 Indian Ocean earthquake more severe
26.05.2017 | Oregon State University

nachricht Devils Hole: Ancient Traces of Climate History
24.05.2017 | Universität Innsbruck

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>