Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation
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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ac9327 |
| _version_ | 1827869810616172544 |
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| author | Nicola Maher Jennifer E Kay Antonietta Capotondi |
| author_facet | Nicola Maher Jennifer E Kay Antonietta Capotondi |
| author_sort | Nicola Maher |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T15:49:24Z |
| format | Article |
| id | doaj.art-e69146c3b3cf40049aeaeb45e64bc499 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:49:24Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-e69146c3b3cf40049aeaeb45e64bc4992023-08-09T15:17:18ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-01171111400510.1088/1748-9326/ac9327Modulation of ENSO teleconnections over North America by the Pacific decadal oscillationNicola Maher0Jennifer E Kay1Antonietta Capotondi2Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder , Boulder, CO, United States of America; Department of Atmospheric and Oceanic Sciences (ATOC), University of Colorado , Boulder, CO, United States of AmericaCooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder , Boulder, CO, United States of America; Department of Atmospheric and Oceanic Sciences (ATOC), University of Colorado , Boulder, CO, United States of AmericaCooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder , Boulder, CO, United States of America; Physical Sciences Laboratory, NOAA , Boulder, CO, United States of AmericaIn 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.https://doi.org/10.1088/1748-9326/ac9327ENSOPDOteleconnectionslarge ensembles |
| spellingShingle | Nicola Maher Jennifer E Kay Antonietta Capotondi Modulation of ENSO teleconnections over North America by the Pacific decadal oscillation Environmental Research Letters ENSO PDO teleconnections large ensembles |
| title | 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_short | 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 |
| topic | ENSO PDO teleconnections large ensembles |
| url | https://doi.org/10.1088/1748-9326/ac9327 |
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