Lightning atmospherics count rates observed at Halley, Antarctica
Lightning is considered to be a sensitive indicator of global change in the troposphere. In this paper we report the first results from the lightningatmospherics (sferics) counter deployed as part of the VELOX II experiment at Halley Station, Antarctica (76°S,27°W). We present examples of high-resol...
Published in: | Journal of Atmospheric and Solar-Terrestrial Physics |
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ftnerc:oai:nora.nerc.ac.uk:20338 2023-05-15T13:45:12+02:00 Lightning atmospherics count rates observed at Halley, Antarctica Watkins, N.W. Clilverd, M.A. Smith, A.J Rodger, C.J. Bharmal, N.A. Yearby, K.H. 2001 http://nora.nerc.ac.uk/id/eprint/20338/ https://doi.org/10.1016/S1364-6826(01)00009-8 unknown Elsevier Watkins, N.W.; Clilverd, M.A. orcid:0000-0002-7388-1529 Smith, A.J; Rodger, C.J.; Bharmal, N.A.; Yearby, K.H. 2001 Lightning atmospherics count rates observed at Halley, Antarctica. Journal of Atmospheric and Solar-Terrestrial Physics, 63 (10). 993-1003. https://doi.org/10.1016/S1364-6826(01)00009-8 <https://doi.org/10.1016/S1364-6826(01)00009-8> Publication - Article PeerReviewed 2001 ftnerc https://doi.org/10.1016/S1364-6826(01)00009-8 2023-02-04T19:32:47Z Lightning is considered to be a sensitive indicator of global change in the troposphere. In this paper we report the first results from the lightningatmospherics (sferics) counter deployed as part of the VELOX II experiment at Halley Station, Antarctica (76°S,27°W). We present examples of high-resolution and survey data for the instrument from its deployment in April 1997 up to March 1998. We show that time resolution causes saturation effects in the data when the activity level is high. However, we show how a simple simulation algorithm is used both to calibrate the system and to model the observed response to a high level of accuracy. We show evidence of a departure of the distribution of VLF noise amplitudes in the high-resolution time series produced for the model from the lognormal form assumed by many authors and in the design of the present instrument. Comparison is also made with a Rayleigh distribution. We compare the corrected flash rate with lightning power measurements, indicating that previous estimates of long-term changes in sferic power made from Halley are consistent with less than 5% change in flash rate in 25 years. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Natural Environment Research Council: NERC Open Research Archive Halley Station ENVELOPE(-26.541,-26.541,-75.581,-75.581) Journal of Atmospheric and Solar-Terrestrial Physics 63 10 993 1003 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Lightning is considered to be a sensitive indicator of global change in the troposphere. In this paper we report the first results from the lightningatmospherics (sferics) counter deployed as part of the VELOX II experiment at Halley Station, Antarctica (76°S,27°W). We present examples of high-resolution and survey data for the instrument from its deployment in April 1997 up to March 1998. We show that time resolution causes saturation effects in the data when the activity level is high. However, we show how a simple simulation algorithm is used both to calibrate the system and to model the observed response to a high level of accuracy. We show evidence of a departure of the distribution of VLF noise amplitudes in the high-resolution time series produced for the model from the lognormal form assumed by many authors and in the design of the present instrument. Comparison is also made with a Rayleigh distribution. We compare the corrected flash rate with lightning power measurements, indicating that previous estimates of long-term changes in sferic power made from Halley are consistent with less than 5% change in flash rate in 25 years. |
format |
Article in Journal/Newspaper |
author |
Watkins, N.W. Clilverd, M.A. Smith, A.J Rodger, C.J. Bharmal, N.A. Yearby, K.H. |
spellingShingle |
Watkins, N.W. Clilverd, M.A. Smith, A.J Rodger, C.J. Bharmal, N.A. Yearby, K.H. Lightning atmospherics count rates observed at Halley, Antarctica |
author_facet |
Watkins, N.W. Clilverd, M.A. Smith, A.J Rodger, C.J. Bharmal, N.A. Yearby, K.H. |
author_sort |
Watkins, N.W. |
title |
Lightning atmospherics count rates observed at Halley, Antarctica |
title_short |
Lightning atmospherics count rates observed at Halley, Antarctica |
title_full |
Lightning atmospherics count rates observed at Halley, Antarctica |
title_fullStr |
Lightning atmospherics count rates observed at Halley, Antarctica |
title_full_unstemmed |
Lightning atmospherics count rates observed at Halley, Antarctica |
title_sort |
lightning atmospherics count rates observed at halley, antarctica |
publisher |
Elsevier |
publishDate |
2001 |
url |
http://nora.nerc.ac.uk/id/eprint/20338/ https://doi.org/10.1016/S1364-6826(01)00009-8 |
long_lat |
ENVELOPE(-26.541,-26.541,-75.581,-75.581) |
geographic |
Halley Station |
geographic_facet |
Halley Station |
genre |
Antarc* Antarctica Antarctica Journal |
genre_facet |
Antarc* Antarctica Antarctica Journal |
op_relation |
Watkins, N.W.; Clilverd, M.A. orcid:0000-0002-7388-1529 Smith, A.J; Rodger, C.J.; Bharmal, N.A.; Yearby, K.H. 2001 Lightning atmospherics count rates observed at Halley, Antarctica. Journal of Atmospheric and Solar-Terrestrial Physics, 63 (10). 993-1003. https://doi.org/10.1016/S1364-6826(01)00009-8 <https://doi.org/10.1016/S1364-6826(01)00009-8> |
op_doi |
https://doi.org/10.1016/S1364-6826(01)00009-8 |
container_title |
Journal of Atmospheric and Solar-Terrestrial Physics |
container_volume |
63 |
container_issue |
10 |
container_start_page |
993 |
op_container_end_page |
1003 |
_version_ |
1766217064636219392 |