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Harrison, R. G., Joshi, M. 
ORCID: https://orcid.org/0000-0002-2948-2811 and Pascoe, K.
(2011)
Inferring convective responses to El Niño with atmospheric electricity measurements at Shetland.
Environmental Research Letters, 6 (4).
ISSN 1748-9326
Abstract
Pacific ocean temperature anomalies associated with the El Niño–Southern Oscillation (ENSO) modulate atmospheric convection and hence thunderstorm electrification. The generated current flows globally via the atmospheric electric circuit, which can be monitored anywhere on Earth. Atmospheric electricity measurements made at Shetland (in Scotland) display a mean global circuit response to ENSO that is characterized by strengthening during 'El Niño' conditions, and weakening during 'La Niña' conditions. Examining the hourly varying response indicates that a potential gradient (PG) increase around noon UT is likely to be associated with a change in atmospheric convection and resultant lightning activity over equatorial Africa and Eastern Asia. A secondary increase in PG just after midnight UT can be attributed to more shower clouds in the central Pacific ocean during an 'El Niño'.
| Item Type: | Article |
|---|---|
| Faculty \ School: | University of East Anglia Research Groups/Centres > Theme - ClimateUEA Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Climatic Research Unit Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences University of East Anglia Schools > Faculty of Science > Tyndall Centre for Climate Change Research Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research |
| Depositing User: | Rhiannon Harvey |
| Date Deposited: | 01 Feb 2012 10:38 |
| Last Modified: | 26 Jul 2023 09:38 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/36694 |
| DOI: | 10.1088/1748-9326/6/4/044028 |
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