The teleconnections between the ENSO and the climate variability of Antarctica
The overall goal of this study is to identify the teleconnection mechanisms that underlie ENSO-Antarctic climate links. Initially time series plots and cross correlation analysis of Antarctic surface and upper air climate data are used to search for high latitude atmospheric signals during Pacific O...
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ftunibirmitheses:oai:etheses.bham.ac.uk:5254 2023-05-15T14:01:01+02:00 The teleconnections between the ENSO and the climate variability of Antarctica Houseago, Richenda Elouise McGregor, Glenn na 1999-07 application/pdf http://etheses.bham.ac.uk//id/eprint/5254/4.hassmallThumbnailVersion/Houseago1999PhD.pdf http://etheses.bham.ac.uk//id/eprint/5254/ http://etheses.bham.ac.uk//id/eprint/5254/4/Houseago1999PhD.pdf English eng http://etheses.bham.ac.uk//id/eprint/5254/4/Houseago1999PhD.pdf Houseago, Richenda Elouise (1999). The teleconnections between the ENSO and the climate variability of Antarctica. University of Birmingham. Ph.D. GE Environmental Sciences QC Physics Thesis NonPeerReviewed 1999 ftunibirmitheses 2021-11-15T09:47:03Z The overall goal of this study is to identify the teleconnection mechanisms that underlie ENSO-Antarctic climate links. Initially time series plots and cross correlation analysis of Antarctic surface and upper air climate data are used to search for high latitude atmospheric signals during Pacific Ocean warm (ENSO) and cold (La Nina) events. Consistent increases (decreases) in pressure were found during warm (cold) events, with a variable response in temperature. Upper air data demonstrate consistent changes in windspeed, cloud cover geopotential height" wind speeds and direction, temperature and relative humidity during ENSO events. Spatial anomaly plots, Hovmoller, harmonic and cluster analyses are used to identify ENSO related climate anomaly wavetrains, teleconnections and propagation mechanisms that link Southern Hemisphere low and high latitudes. Although inter-warm and cold event variability is a characteristic, strong meridional anomaly contrasts, equatorward and poleward anomaly propagation, and distinct jetstream behaviour were apparent in all events studied. In warm (cold) events subtropical jet strength increases (decreases) and polar jet strength decreases (increases) resulting in a decrease (increase) in poleward moving cyclonicity. The jetstreams are considered to play a major role in ENSO related climate anomaly propagations. Thesis Antarc* Antarctic Antarctica University of Birmingham: eTheses Repository Antarctic Pacific |
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Open Polar |
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University of Birmingham: eTheses Repository |
op_collection_id |
ftunibirmitheses |
language |
English |
topic |
GE Environmental Sciences QC Physics |
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GE Environmental Sciences QC Physics Houseago, Richenda Elouise The teleconnections between the ENSO and the climate variability of Antarctica |
topic_facet |
GE Environmental Sciences QC Physics |
description |
The overall goal of this study is to identify the teleconnection mechanisms that underlie ENSO-Antarctic climate links. Initially time series plots and cross correlation analysis of Antarctic surface and upper air climate data are used to search for high latitude atmospheric signals during Pacific Ocean warm (ENSO) and cold (La Nina) events. Consistent increases (decreases) in pressure were found during warm (cold) events, with a variable response in temperature. Upper air data demonstrate consistent changes in windspeed, cloud cover geopotential height" wind speeds and direction, temperature and relative humidity during ENSO events. Spatial anomaly plots, Hovmoller, harmonic and cluster analyses are used to identify ENSO related climate anomaly wavetrains, teleconnections and propagation mechanisms that link Southern Hemisphere low and high latitudes. Although inter-warm and cold event variability is a characteristic, strong meridional anomaly contrasts, equatorward and poleward anomaly propagation, and distinct jetstream behaviour were apparent in all events studied. In warm (cold) events subtropical jet strength increases (decreases) and polar jet strength decreases (increases) resulting in a decrease (increase) in poleward moving cyclonicity. The jetstreams are considered to play a major role in ENSO related climate anomaly propagations. |
author2 |
McGregor, Glenn na |
format |
Thesis |
author |
Houseago, Richenda Elouise |
author_facet |
Houseago, Richenda Elouise |
author_sort |
Houseago, Richenda Elouise |
title |
The teleconnections between the ENSO and the climate variability of Antarctica |
title_short |
The teleconnections between the ENSO and the climate variability of Antarctica |
title_full |
The teleconnections between the ENSO and the climate variability of Antarctica |
title_fullStr |
The teleconnections between the ENSO and the climate variability of Antarctica |
title_full_unstemmed |
The teleconnections between the ENSO and the climate variability of Antarctica |
title_sort |
teleconnections between the enso and the climate variability of antarctica |
publishDate |
1999 |
url |
http://etheses.bham.ac.uk//id/eprint/5254/4.hassmallThumbnailVersion/Houseago1999PhD.pdf http://etheses.bham.ac.uk//id/eprint/5254/ http://etheses.bham.ac.uk//id/eprint/5254/4/Houseago1999PhD.pdf |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://etheses.bham.ac.uk//id/eprint/5254/4/Houseago1999PhD.pdf Houseago, Richenda Elouise (1999). The teleconnections between the ENSO and the climate variability of Antarctica. University of Birmingham. Ph.D. |
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1766270446291910656 |