Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation
Abstract In this study, we investigate whether the Pacific decadal oscillation (PDO) can enhance or diminish El Niño Southern Oscillation (ENSO) temperature and precipitation teleconnections over North America using five single model initial-condition large ensembles (SMILEs). The use of SMILEs faci...
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crioppubl:10.1088/1748-9326/ac9327 2024-09-15T17:36:28+00:00 Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation Maher, Nicola Kay, Jennifer E Capotondi, Antonietta Division of Atmospheric and Geospace Sciences National Oceanic and Atmospheric Administration Climate Program Office 2022 http://dx.doi.org/10.1088/1748-9326/ac9327 https://iopscience.iop.org/article/10.1088/1748-9326/ac9327 https://iopscience.iop.org/article/10.1088/1748-9326/ac9327/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 11, page 114005 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac9327 2024-08-19T04:14:50Z Abstract In this study, we investigate whether the Pacific decadal oscillation (PDO) can enhance or diminish El Niño Southern Oscillation (ENSO) temperature and precipitation teleconnections over North America using five single model initial-condition large ensembles (SMILEs). The use of SMILEs facilitates a statistically robust comparison of ENSO events that occur during different phases of the PDO. We find that a positive PDO enhances winter and spring El Niño temperature and precipitation teleconnections and diminishes La Niña teleconnections. A negative PDO has the opposite effect. The modulation of ENSO by the PDO is mediated by differences in the location and strength of the Aleutian Low and Pacific Jet during ENSO events under different phases of the PDO. This modulation is a simple combination of the individual effects of the PDO and ENSO over North America. Finally, we show that ENSO and the PDO can be used to evaluate the likelihood of the occurrence of temperature and precipitation anomalies in different regions, but cannot be used as a deterministic predictor of these anomalies due to the large variability between individual events. Article in Journal/Newspaper aleutian low IOP Publishing Environmental Research Letters |
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Abstract In this study, we investigate whether the Pacific decadal oscillation (PDO) can enhance or diminish El Niño Southern Oscillation (ENSO) temperature and precipitation teleconnections over North America using five single model initial-condition large ensembles (SMILEs). The use of SMILEs facilitates a statistically robust comparison of ENSO events that occur during different phases of the PDO. We find that a positive PDO enhances winter and spring El Niño temperature and precipitation teleconnections and diminishes La Niña teleconnections. A negative PDO has the opposite effect. The modulation of ENSO by the PDO is mediated by differences in the location and strength of the Aleutian Low and Pacific Jet during ENSO events under different phases of the PDO. This modulation is a simple combination of the individual effects of the PDO and ENSO over North America. Finally, we show that ENSO and the PDO can be used to evaluate the likelihood of the occurrence of temperature and precipitation anomalies in different regions, but cannot be used as a deterministic predictor of these anomalies due to the large variability between individual events. |
author2 |
Division of Atmospheric and Geospace Sciences National Oceanic and Atmospheric Administration Climate Program Office |
format |
Article in Journal/Newspaper |
author |
Maher, Nicola Kay, Jennifer E Capotondi, Antonietta |
spellingShingle |
Maher, Nicola Kay, Jennifer E Capotondi, Antonietta Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
author_facet |
Maher, Nicola Kay, Jennifer E Capotondi, Antonietta |
author_sort |
Maher, Nicola |
title |
Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
title_short |
Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
title_full |
Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
title_fullStr |
Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
title_full_unstemmed |
Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation |
title_sort |
modulation of enso teleconnections over north america by the pacific decadal oscillation |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac9327 https://iopscience.iop.org/article/10.1088/1748-9326/ac9327 https://iopscience.iop.org/article/10.1088/1748-9326/ac9327/pdf |
genre |
aleutian low |
genre_facet |
aleutian low |
op_source |
Environmental Research Letters volume 17, issue 11, page 114005 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac9327 |
container_title |
Environmental Research Letters |
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1810489793864269824 |