The effects of teleconnections on climate variability of the North Atlantic-European area
Observed data, reanalysis and an intermediately complex general circulation model of the atmosphere (ICTP AGCM) have been employed to study the effects of teleconnections on the North Atlantic-European region as a part of this thesis. Modulation of the El Niño-Southern Oscillation (ENSO) teleconnect...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Sveučilište u Zagrebu. Prirodoslovno-matematički fakultet. Geofizički odsjek.
2022
|
Subjects: | |
Online Access: | https://dr.nsk.hr/islandora/object/pmf:11281 https://urn.nsk.hr/urn:nbn:hr:217:767143 https://repozitorij.unizg.hr/islandora/object/pmf:11281 https://repozitorij.unizg.hr/islandora/object/pmf:11281/datastream/PDF |
id |
ftnulzagrebdr:oai:dr.nsk.hr:pmf_11281 |
---|---|
record_format |
openpolar |
spelling |
ftnulzagrebdr:oai:dr.nsk.hr:pmf_11281 2023-09-26T15:20:52+02:00 The effects of teleconnections on climate variability of the North Atlantic-European area Daljinski utjecaji na klimatsku varijabilnost područja sjevernog Atlantika i Europe Ivasić, Sara Herceg Bulić, Ivana Kucharski, Fred 2022-10-13 application/pdf https://dr.nsk.hr/islandora/object/pmf:11281 https://urn.nsk.hr/urn:nbn:hr:217:767143 https://repozitorij.unizg.hr/islandora/object/pmf:11281 https://repozitorij.unizg.hr/islandora/object/pmf:11281/datastream/PDF eng eng Sveučilište u Zagrebu. Prirodoslovno-matematički fakultet. Geofizički odsjek. University of Zagreb. Faculty of Science. Department of Geophysics. info:eu-repo/grantAgreement/HRZZ/UIP/UIP-2017-05-6396/HR/Klimatske promjene i varijabilnost u Hrvatskoj – od globalnih utjecaja do lokalnih zelenih rješenja/CroClimGoGreen https://dr.nsk.hr/islandora/object/pmf:11281 https://urn.nsk.hr/urn:nbn:hr:217:767143 https://repozitorij.unizg.hr/islandora/object/pmf:11281 https://repozitorij.unizg.hr/islandora/object/pmf:11281/datastream/PDF http://rightsstatements.org/vocab/InC/1.0/ info:eu-repo/semantics/embargoedAccess PRIRODNE ZNANOSTI. Geofizika. Meteorologija s klimatologijom NATURAL SCIENCES. Geophysics. Meteorology and Climatology Geologija. Meteorologija. Hidrologija Geology. Meteorology. Hydrology info:eu-repo/classification/udc/55(043.3) Climate variability North Atlantic-European climate Tropical-extratropical teleconnections ENSO teleconnections Boundary-forced predictability klimatska varijabilnost klima područja sjevernog Atlantika i Europe daljinske veze El Niño-južne oscilacije potencijalna prediktabilnost info:eu-repo/semantics/doctoralThesis text 2022 ftnulzagrebdr 2023-08-27T20:30:24Z Observed data, reanalysis and an intermediately complex general circulation model of the atmosphere (ICTP AGCM) have been employed to study the effects of teleconnections on the North Atlantic-European region as a part of this thesis. Modulation of the El Niño-Southern Oscillation (ENSO) teleconnection to the North Atlantic-European (NAE) region and its relationship with the North Atlantic Oscillation (NAO) have been tested via regression maps, running correlation, composite analysis and probability distributions. The impact of tropical ocean sea surface temperatures (SSTs) on the variability and predictable components of the late-winter atmospheric circulation over the NAE area has been investigated by employing advanced analysis techniques, such as the Empirical Orthogonal Functions (EOF) analysis and the signal-to-noise optimal patterns method. Targeted model simulations were designed to detect which ocean areas are the most important for establishing potentially predictable modes of atmospheric circulation in the NAE area. Finally, specific numerical model simulations were used to assess the impact of the warmer climate conditions on the variability and predictable components of the late winter circulation in the area of interest. Results have shown that the ENSO teleconnection to the NAE region is not stationary. Its spatial pattern has changed from resembling the negative NAO at the surface to a different pattern with weak, statistically non-significant values after the 1970s. Meanwhile, targeted ICTP AGCM simulations confirmed the importance of sea-ice concentration and the background state of the sea surface temperatures in the modulation of the ENSO-NAE teleconnection. The change was detected at the surface and upper levels of the atmosphere in several variables and different datasets. Regarding the impact of tropical SSTs, it is suggested that the lower-boundary forcing originating from the tropics, especially the tropical Pacific, is essential for establishing the potentially predictable modes of ... Doctoral or Postdoctoral Thesis North Atlantic North Atlantic oscillation Sea ice Croatian Digital Dissertations Repository (National and University Library in Zagreb) Pacific |
institution |
Open Polar |
collection |
Croatian Digital Dissertations Repository (National and University Library in Zagreb) |
op_collection_id |
ftnulzagrebdr |
language |
English |
topic |
PRIRODNE ZNANOSTI. Geofizika. Meteorologija s klimatologijom NATURAL SCIENCES. Geophysics. Meteorology and Climatology Geologija. Meteorologija. Hidrologija Geology. Meteorology. Hydrology info:eu-repo/classification/udc/55(043.3) Climate variability North Atlantic-European climate Tropical-extratropical teleconnections ENSO teleconnections Boundary-forced predictability klimatska varijabilnost klima područja sjevernog Atlantika i Europe daljinske veze El Niño-južne oscilacije potencijalna prediktabilnost |
spellingShingle |
PRIRODNE ZNANOSTI. Geofizika. Meteorologija s klimatologijom NATURAL SCIENCES. Geophysics. Meteorology and Climatology Geologija. Meteorologija. Hidrologija Geology. Meteorology. Hydrology info:eu-repo/classification/udc/55(043.3) Climate variability North Atlantic-European climate Tropical-extratropical teleconnections ENSO teleconnections Boundary-forced predictability klimatska varijabilnost klima područja sjevernog Atlantika i Europe daljinske veze El Niño-južne oscilacije potencijalna prediktabilnost Ivasić, Sara The effects of teleconnections on climate variability of the North Atlantic-European area |
topic_facet |
PRIRODNE ZNANOSTI. Geofizika. Meteorologija s klimatologijom NATURAL SCIENCES. Geophysics. Meteorology and Climatology Geologija. Meteorologija. Hidrologija Geology. Meteorology. Hydrology info:eu-repo/classification/udc/55(043.3) Climate variability North Atlantic-European climate Tropical-extratropical teleconnections ENSO teleconnections Boundary-forced predictability klimatska varijabilnost klima područja sjevernog Atlantika i Europe daljinske veze El Niño-južne oscilacije potencijalna prediktabilnost |
description |
Observed data, reanalysis and an intermediately complex general circulation model of the atmosphere (ICTP AGCM) have been employed to study the effects of teleconnections on the North Atlantic-European region as a part of this thesis. Modulation of the El Niño-Southern Oscillation (ENSO) teleconnection to the North Atlantic-European (NAE) region and its relationship with the North Atlantic Oscillation (NAO) have been tested via regression maps, running correlation, composite analysis and probability distributions. The impact of tropical ocean sea surface temperatures (SSTs) on the variability and predictable components of the late-winter atmospheric circulation over the NAE area has been investigated by employing advanced analysis techniques, such as the Empirical Orthogonal Functions (EOF) analysis and the signal-to-noise optimal patterns method. Targeted model simulations were designed to detect which ocean areas are the most important for establishing potentially predictable modes of atmospheric circulation in the NAE area. Finally, specific numerical model simulations were used to assess the impact of the warmer climate conditions on the variability and predictable components of the late winter circulation in the area of interest. Results have shown that the ENSO teleconnection to the NAE region is not stationary. Its spatial pattern has changed from resembling the negative NAO at the surface to a different pattern with weak, statistically non-significant values after the 1970s. Meanwhile, targeted ICTP AGCM simulations confirmed the importance of sea-ice concentration and the background state of the sea surface temperatures in the modulation of the ENSO-NAE teleconnection. The change was detected at the surface and upper levels of the atmosphere in several variables and different datasets. Regarding the impact of tropical SSTs, it is suggested that the lower-boundary forcing originating from the tropics, especially the tropical Pacific, is essential for establishing the potentially predictable modes of ... |
author2 |
Herceg Bulić, Ivana Kucharski, Fred |
format |
Doctoral or Postdoctoral Thesis |
author |
Ivasić, Sara |
author_facet |
Ivasić, Sara |
author_sort |
Ivasić, Sara |
title |
The effects of teleconnections on climate variability of the North Atlantic-European area |
title_short |
The effects of teleconnections on climate variability of the North Atlantic-European area |
title_full |
The effects of teleconnections on climate variability of the North Atlantic-European area |
title_fullStr |
The effects of teleconnections on climate variability of the North Atlantic-European area |
title_full_unstemmed |
The effects of teleconnections on climate variability of the North Atlantic-European area |
title_sort |
effects of teleconnections on climate variability of the north atlantic-european area |
publisher |
Sveučilište u Zagrebu. Prirodoslovno-matematički fakultet. Geofizički odsjek. |
publishDate |
2022 |
url |
https://dr.nsk.hr/islandora/object/pmf:11281 https://urn.nsk.hr/urn:nbn:hr:217:767143 https://repozitorij.unizg.hr/islandora/object/pmf:11281 https://repozitorij.unizg.hr/islandora/object/pmf:11281/datastream/PDF |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_relation |
info:eu-repo/grantAgreement/HRZZ/UIP/UIP-2017-05-6396/HR/Klimatske promjene i varijabilnost u Hrvatskoj – od globalnih utjecaja do lokalnih zelenih rješenja/CroClimGoGreen https://dr.nsk.hr/islandora/object/pmf:11281 https://urn.nsk.hr/urn:nbn:hr:217:767143 https://repozitorij.unizg.hr/islandora/object/pmf:11281 https://repozitorij.unizg.hr/islandora/object/pmf:11281/datastream/PDF |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ info:eu-repo/semantics/embargoedAccess |
_version_ |
1778145071381610496 |