Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet)
Since the summer of 1996, scientists from China and Japan have conducted a joint observation of natural cloud-to-ground lightning discharges in the Zhongchuan area that is located close to Qinghai-Xizang (Tibet) Plateau, China. It has been found that the long-duration of intracloud discharge pro...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2000-10-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/18/1340/2000/angeo-18-1340-2000.pdf |
| _version_ | 1818427243606573056 |
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| author | X. Qie Y. Yu X. Liu C. Guo D. Wang T. Watanabe T. Ushio |
| author_facet | X. Qie Y. Yu X. Liu C. Guo D. Wang T. Watanabe T. Ushio |
| author_sort | X. Qie |
| collection | DOAJ |
| description | Since the summer of 1996, scientists from
China and Japan have conducted a joint observation of natural cloud-to-ground
lightning discharges in the Zhongchuan area that is located close to
Qinghai-Xizang (Tibet) Plateau, China. It has been found that the long-duration
of intracloud discharge processes, just before the first return stroke, lasted
more than 120 ms for 85% of cloud-to-ground flashes in this area, with a mean
duration of 189.7 ms and a maximum of 300 ms. We present the results of charge
sources neutralized by four ground flashes and two intracloud discharge
processes, just before the first return stroke, by using the data from a 5-site
slow antenna network synchronized by GPS with 1 µs time resolution. The result
shows that the altitudes of the neutralized negative charge for three negative
ground flashes were between 2.7 to 5.4 km above the ground, while that of
neutralized positive charges for one positive ground flash and one continuing
current process were at about 2.0 km above the ground. The comparison with radar
echo showed that the negative discharges initiated in the region greater than 20
dBZ or near the edge of the region with intense echoes greater than 40 dBZ,
while positive discharge initiated in the weak echo region.<br><br><b>Key words: </b>Meterology and atmospheric dynamics
(atmospheric electricity; convective processes; lightning)</p>
<p style="line-height: 20px;"> |
| first_indexed | 2024-12-14T14:42:38Z |
| format | Article |
| id | doaj.art-4fd30b303c72484a98d71a1864d5ce70 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-14T14:42:38Z |
| publishDate | 2000-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-4fd30b303c72484a98d71a1864d5ce702022-12-21T22:57:23ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762000-10-01181340134810.1007/s00585-000-1340-zCharge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet)X. Qie0Y. Yu1X. Liu2C. Guo3D. Wang4T. Watanabe5T. Ushio6Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 73000, P.R. ChinaCold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 73000, P.R. ChinaCold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 73000, P.R. ChinaShanghai Meteorological Institute, P. R. ChinaGifu University, Gifu, JapanGifu University, Gifu, JapanOsaka University, Osaka, JapanSince the summer of 1996, scientists from China and Japan have conducted a joint observation of natural cloud-to-ground lightning discharges in the Zhongchuan area that is located close to Qinghai-Xizang (Tibet) Plateau, China. It has been found that the long-duration of intracloud discharge processes, just before the first return stroke, lasted more than 120 ms for 85% of cloud-to-ground flashes in this area, with a mean duration of 189.7 ms and a maximum of 300 ms. We present the results of charge sources neutralized by four ground flashes and two intracloud discharge processes, just before the first return stroke, by using the data from a 5-site slow antenna network synchronized by GPS with 1 µs time resolution. The result shows that the altitudes of the neutralized negative charge for three negative ground flashes were between 2.7 to 5.4 km above the ground, while that of neutralized positive charges for one positive ground flash and one continuing current process were at about 2.0 km above the ground. The comparison with radar echo showed that the negative discharges initiated in the region greater than 20 dBZ or near the edge of the region with intense echoes greater than 40 dBZ, while positive discharge initiated in the weak echo region.<br><br><b>Key words: </b>Meterology and atmospheric dynamics (atmospheric electricity; convective processes; lightning)</p> <p style="line-height: 20px;"> https://www.ann-geophys.net/18/1340/2000/angeo-18-1340-2000.pdf |
| spellingShingle | X. Qie Y. Yu X. Liu C. Guo D. Wang T. Watanabe T. Ushio Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) Annales Geophysicae |
| title | Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) |
| title_full | Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) |
| title_fullStr | Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) |
| title_full_unstemmed | Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) |
| title_short | Charge analysis on lightning discharges to the ground in Chinese inland plateau (close to Tibet) |
| title_sort | charge analysis on lightning discharges to the ground in chinese inland plateau close to tibet |
| url | https://www.ann-geophys.net/18/1340/2000/angeo-18-1340-2000.pdf |
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