Notice: Constant _YOUHAVE already defined in /home/marie/public_html/language/lang-romanian.php on line 159

Notice: Undefined variable: gfx in /home/marie/public_html/mainfile.php on line 1314

Notice: Undefined variable: gfx in /home/marie/public_html/mainfile.php on line 1332

Notice: Undefined variable: user in /home/marie/public_html/modules.php on line 27

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 219

Notice: Undefined variable: sitename in /home/marie/public_html/modules/Encyclopedia/language/lang-romanian.php on line 19

Notice: Undefined variable: ltr in /home/marie/public_html/modules/Encyclopedia/index.php on line 290

Notice: Undefined variable: page in /home/marie/public_html/modules/Encyclopedia/index.php on line 290

Notice: Undefined variable: query in /home/marie/public_html/modules/Encyclopedia/index.php on line 290

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 654

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 657

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 537

Notice: Use of undefined constant ip_address - assumed 'ip_address' in /home/marie/public_html/includes/ipban.php on line 30

Notice: Undefined offset: 3 in /home/marie/public_html/includes/ipban.php on line 31

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266
Meteorologie,Climatologie,Agrometeorologie - Enciclopedia
Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Use of undefined constant bid - assumed 'bid' in /home/marie/public_html/mainfile.php on line 1238

Notice: Use of undefined constant imageurl - assumed 'imageurl' in /home/marie/public_html/mainfile.php on line 1239

Notice: Use of undefined constant clickurl - assumed 'clickurl' in /home/marie/public_html/mainfile.php on line 1240

Notice: Use of undefined constant alttext - assumed 'alttext' in /home/marie/public_html/mainfile.php on line 1241
Meteorologie
Climatologie
Agrometeorologie

Portal pentru toti cei interesati de starea vremii, de mediu

Profesionist sau Amator?
Oricum te intereseaza starea vremii! Oricum faci presupuneri despre cum va fi vremea!
Participa acum la concursul ProMeteo de prognoza a starii vremii.
Detalii aici



Notice: Use of undefined constant left - assumed 'left' in /home/marie/public_html/themes/Meteorologie/theme.php on line 127

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant userbox - assumed 'userbox' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 433

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Undefined variable: content in /home/marie/public_html/blocks/block-Modules.php on line 54

Notice: Undefined variable: def_module in /home/marie/public_html/blocks/block-Modules.php on line 55

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242
Module
· Home
· Contul tău
· Downloads
· Intrebari frecvente
· Jurnal
· Mesaje private
· Meteo aeroporturi
· Pagini web
· Recomandare
· Sugestii


Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 429

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant userbox - assumed 'userbox' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 433

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 654

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 657

Notice: Undefined offset: 1 in /home/marie/public_html/blocks/block-ChatInfo.php on line 24

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266
Info Chat
Utilizatori in chat : 0
Intra acum pe chat


Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant userbox - assumed 'userbox' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 433
Recomandari




Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant admin - assumed 'admin' in /home/marie/public_html/mainfile.php on line 429

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant userbox - assumed 'userbox' in /home/marie/public_html/mainfile.php on line 431

Notice: Use of undefined constant bkey - assumed 'bkey' in /home/marie/public_html/mainfile.php on line 433

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266

Notice: Undefined variable: public_msg in /home/marie/public_html/mainfile.php on line 1155


Notice: Undefined offset: 2 in /home/marie/public_html/mainfile.php on line 266
Fulgerul


Fulgerul este un fenomen luminos care apare odata cu descarcarea brusca de electricitate atmosferica. Descarcarea poate avea loc in nori sau poate pleca din nor.


 Descarcarea electrica are loc datorita ionizarii aerului. In norii orajosi exista campuri electrice puternice, electronii eliberati prin ionizarea naturala a erului nu se mai fixeaza pe molecule neutre pentru a forma ioni negativi, ei capata energii cinetice suficiente pentru ca impreuna cu ionii pozitivi sa determine o ionizare puternica a aerului.


Descarcarile bruste din atmosfera incep printr-o descarcare lenta, de intensitate slaba si invizibila care se numeste descarcare pilot sau leader, formata din electronii liberi care se formeaza in partea inferioara a norului, unde campurile electric au 30.000-35.000 V/m. Aceasta descarcare lenta de electroni spre Pamant se intensifica si se repeta in salturi, pana se atinge suprafata Pamantului. Dupa ce este atins solul , intensitatea campului electric este atat de mare incat ia nastere un flux pozitiv indreptat spre nor, adica a descarcarii principale. Descarcarcarea nu se poate forma in nor, pentru ca acesta nu este bun conductor de electricitate ca Pamantul, a carui buna conductivitate permite un debit mare de electroni fara ca potentialul sa scada rapid.


Ramificatiile fulgerelor se explica prin forta repulsiva ce apare in frontul avalansei de electroni ce coboara din  nor si duce la devierea unora dintre acestia de la traseul principal.




Descarcarile electrice se pot clasificate astfel:


- traznete, descarcarile la sol. Aceste descarcari au loc intre nor si pamant , urmeaza o traiectorie sinuoasa si prezinta ramificatii orientate in jos, care pleaca dintr-un canal principal bine conturat




- descarcari interne. Aceste descarcari se produc in interiorul norului, au aspect de panze si nu se poate distinge un canal net, norul se lumineaza difuz.




- descarcari atmosferice . Acestea au un drum sinuos, pleaca din nor dar nu ating solul. Se mai numeste si fulger liniar si prezinta frecvent o parte relativ orizontala si lunga.







[ Înapoi ]


Notice: Undefined offset: 1 in /home/marie/public_html/mainfile.php on line 242

Meteorologie

Copyright © . Toate drepturile rezervate. © de catre Meteorologie,Climatologie,Agrometeorologie - (3602 citiri)



Termeni și conditii de utilizare a site-ului
PHP-Nuke Copyright © 2005 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Generare Pagina: 0.03 Secunde