|
|
|
|
| LEADER |
01000naa a22002652 4500 |
| 001 |
NLM298585065 |
| 003 |
DE-627 |
| 005 |
20231225094500.0 |
| 007 |
cr uuu---uuuuu |
| 008 |
231225s2019 xx |||||o 00| ||eng c |
| 024 |
7 |
|
|a 10.1029/2019GL082063
|2 doi
|
| 028 |
5 |
2 |
|a pubmed24n0995.xml
|
| 035 |
|
|
|a (DE-627)NLM298585065
|
| 035 |
|
|
|a (NLM)31244497
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Malagón-Romero, A
|e verfasserin
|4 aut
|
| 245 |
1 |
0 |
|a Spontaneous Emergence of Space Stems Ahead of Negative Leaders in Lightning and Long Sparks
|
| 264 |
|
1 |
|c 2019
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ƒaComputermedien
|b c
|2 rdamedia
|
| 338 |
|
|
|a ƒa Online-Ressource
|b cr
|2 rdacarrier
|
| 500 |
|
|
|a Date Revised 12.10.2023
|
| 500 |
|
|
|a published: Print-Electronic
|
| 500 |
|
|
|a Citation Status PubMed-not-MEDLINE
|
| 520 |
|
|
|a We investigate the emergence of space stems ahead of negative leaders. These are luminous spots that appear ahead of an advancing leader mediating the leader's stepped propagation. We show that space stems start as regions of locally depleted conductivity that form in the streamers of the corona around the leader. An attachment instability enhances the electric field leading to strongly inhomogeneous, bright, and locally warmer regions ahead of the leader that explain the existing observations. Since the attachment instability is only triggered by fields above 10 kV/cm and internal electric fields are lower in positive than in negative streamers, our results explain why, although common in negative leaders, space stems, and stepping are hardly observed if not absent in positive leaders. Further work is required to fully explain the streamer to leader transition, which requires an electric current persisting for timescales longer than the typical attachment time of electrons, around 100 ns
|
| 650 |
|
4 |
|a Journal Article
|
| 650 |
|
4 |
|a attachment instability
|
| 650 |
|
4 |
|a ionization wave
|
| 650 |
|
4 |
|a space stem
|
| 650 |
|
4 |
|a streamer
|
| 650 |
|
4 |
|a streamer to leader
|
| 700 |
1 |
|
|a Luque, A
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Geophysical research letters
|d 1984
|g 46(2019), 7 vom: 16. Apr., Seite 4029-4038
|w (DE-627)NLM098182501
|x 0094-8276
|7 nnns
|
| 773 |
1 |
8 |
|g volume:46
|g year:2019
|g number:7
|g day:16
|g month:04
|g pages:4029-4038
|
| 856 |
4 |
0 |
|u http://dx.doi.org/10.1029/2019GL082063
|3 Volltext
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_350
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 46
|j 2019
|e 7
|b 16
|c 04
|h 4029-4038
|