The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis
Ensemble of seasonal forecasts done with four atmospheric models over 26 winters and springs (1969-1994) are used to investigate the Northern Hemispheric model responses to SST anomalies and to compare them with observations. The response, for winter (DJF) and spring (MAM), is obtained as the regres...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
McGill University
2004
|
Subjects: | |
Online Access: | http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82227 |
id |
ftcanadathes:oai:collectionscanada.gc.ca:QMM.82227 |
---|---|
record_format |
openpolar |
spelling |
ftcanadathes:oai:collectionscanada.gc.ca:QMM.82227 2023-05-15T17:29:56+02:00 The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis Dumas, Karine Master of Science (Department of Atmospheric and Oceanic Sciences.) 2004 application/pdf http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82227 en eng McGill University alephsysno: 002211366 proquestno: AAIMR12438 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82227 All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. Physics Atmospheric Science Electronic Thesis or Dissertation 2004 ftcanadathes 2014-02-16T01:07:58Z Ensemble of seasonal forecasts done with four atmospheric models over 26 winters and springs (1969-1994) are used to investigate the Northern Hemispheric model responses to SST anomalies and to compare them with observations. The response, for winter (DJF) and spring (MAM), is obtained as the regression of the 500hPa geopotential heights against the main modes of sea surface temperature (SST) variability over two different regions of the world oceans. The regression against the main mode of the equatorial Pacific Ocean SST, takes the expected form of the Pacific-North-America (PNA) pattern both in models and observations. The response to the North Atlantic SST is an AO/NAO-like signal for the observations and also, to varying degrees, for the models. The similarity of the regression to the third mode of equatorial Pacific SST and to the first mode of North Atlantic SST during the spring season is discussed, along with the nonlinear features of the ENSO influence. Thesis North Atlantic Theses Canada/Thèses Canada (Library and Archives Canada) Pacific |
institution |
Open Polar |
collection |
Theses Canada/Thèses Canada (Library and Archives Canada) |
op_collection_id |
ftcanadathes |
language |
English |
topic |
Physics Atmospheric Science |
spellingShingle |
Physics Atmospheric Science Dumas, Karine The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
topic_facet |
Physics Atmospheric Science |
description |
Ensemble of seasonal forecasts done with four atmospheric models over 26 winters and springs (1969-1994) are used to investigate the Northern Hemispheric model responses to SST anomalies and to compare them with observations. The response, for winter (DJF) and spring (MAM), is obtained as the regression of the 500hPa geopotential heights against the main modes of sea surface temperature (SST) variability over two different regions of the world oceans. The regression against the main mode of the equatorial Pacific Ocean SST, takes the expected form of the Pacific-North-America (PNA) pattern both in models and observations. The response to the North Atlantic SST is an AO/NAO-like signal for the observations and also, to varying degrees, for the models. The similarity of the regression to the third mode of equatorial Pacific SST and to the first mode of North Atlantic SST during the spring season is discussed, along with the nonlinear features of the ENSO influence. |
format |
Thesis |
author |
Dumas, Karine |
author_facet |
Dumas, Karine |
author_sort |
Dumas, Karine |
title |
The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
title_short |
The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
title_full |
The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
title_fullStr |
The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
title_full_unstemmed |
The influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
title_sort |
influence of sea surface temperature anomalies on the extra-tropical atmosphere : a winter and spring analysis |
publisher |
McGill University |
publishDate |
2004 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82227 |
op_coverage |
Master of Science (Department of Atmospheric and Oceanic Sciences.) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
alephsysno: 002211366 proquestno: AAIMR12438 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82227 |
op_rights |
All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1766125168438018048 |