Niño 4 West (Niño-4W) sea surface temperature variability
Article
Article Title | Niño 4 West (Niño-4W) sea surface temperature variability |
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ERA Journal ID | 201011 |
Article Category | Article |
Authors | Feng, M., Zhang, Y., Hendon, H., McPhaden, M. and Marshall, A. |
Journal Title | Journal of Geophysical Research: Oceans |
Journal Citation | 126 (9) |
Year | 2021 |
ISSN | 2169-9275 |
2169-9291 | |
Digital Object Identifier (DOI) | https://doi.org/10.1029/2021JC017591 |
Web Address (URL) | https://doi.org/10.1029/2021JC017591 |
Abstract | Sea surface temperature (SST) variability in the western half of the Niño 4 region (Niño-4W), bounded by 160°E−175°W and 5°S–5°N, has a significant impact on weather and the marine environment of the Indo-Pacific. It exhibits significant negative skewness, with the strong penetration of the cold tongue into the western Pacific during strong La Niñas but a more muted response during El Niños. Zonal advection plays a dominant role in driving Niño-4W SST cooling during the strong La Niña events; vertical processes also contribute, with air-sea heat fluxes providing weak negative feedback. Advection also plays a key role in driving the Niño-4W SST warming, which is not always in sync with El Niño events. Among the advection terms, the advection of mean temperature by zonal velocity anomalies, or zonal advective feedback, plays a key role during the development phase of the warm and cold events. Strong negative air-sea heat flux anomalies during the development of warm events are linked to the negative SST skewness in the Niño-4W region. |
ANZSRC Field of Research 2020 | 370105. Atmospheric dynamics |
Byline Affiliations | Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia |
University of Sydney | |
Australian Bureau of Meteorology | |
National Oceanic and Atmospheric Administration, United States | |
Centre for Applied Climate Sciences (Research) |
https://research.usq.edu.au/item/zz60v/ni-o-4-west-ni-o-4w-sea-surface-temperature-variability
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