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Definition of Antarctic Oscillation index
Abstract
Following Walker's work about his famous three oscillations published during the 1920–30s, many papers were written about atmospheric oscillations. A fourth atmospheric oscillation in the middle and high southern latitudes was found, and named the Antarctic Oscillation (AO). AO refers to a large scale alternation of atmospheric mass between the mid‐latitudes and high latitudes surface pressure. In order to understand the spatial structure of sea level pressure variation in detail, empirical orthogonal function analysis is applied. An objective index of the Antarctic Oscillation Index (AOI) is defined as the difference of zonal mean sea level pressure between 40°S and 65°S. The AOI has the potential for clarifying climate regimes in the southern hemisphere, similar to how the NAO and the NPO has been used in the northern hemisphere.
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Citations
Cited by
Annular Modes in the Extratropical Circulation. Part I: Month-to-Month Variability*
Thompson, D. W. J., & Wallace, J. M. (2000) · Journal of Climate · doi:10.1175/1520-0442(2000)013<1000:amitec>2.0.co;2 · Cited by 3,403
Climate impacts of the El Niño–Southern Oscillation on South America
Cai, W., McPhaden, M. J., Grimm, A. M., Rodrigues, R. R., Taschetto, A. S., Garreaud, R. D., Dewitte, B., Poveda, G., Ham, Y.-G., Santoso, A., et al. (2020) · Nature Reviews Earth & Environment · doi:10.1038/s43017-020-0040-3 · Cited by 782
A review of recent changes in Southern Ocean sea ice, their drivers and forcings
Hobbs, W. R., Massom, R., Stammerjohn, S., Reid, P., Williams, G., & Meier, W. (2016) · Global and Planetary Change · doi:10.1016/j.gloplacha.2016.06.008 · Cited by 354
Damiani, A., Cordero, R. R., Llanillo, P. J., Feron, S., Boisier, J. P., Garreaud, R., Rondanelli, R., Irie, H., & Watanabe, S. (2020) · Atmosphere · doi:10.3390/atmos11060579 · Cited by 38
The Overlooked Role of the Stratosphere Under a Solar Constant Reduction
Bednarz, E. M., Visioni, D., Banerjee, A., Braesicke, P., Kravitz, B., & MacMartin, D. G. (2022) · Geophysical Research Letters · doi:10.1029/2022gl098773 · Cited by 17
Metadata
- Authors
- Gong, D., & Wang, S.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 1999-02-15
- Volume
- 26
- Issue
- 4
- Pages
- 459-462
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2048711169
- Cited by
- 1,067
- References
- 0
- FWCI
- 7.28
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gong, D., & Wang, S. (1999). Definition of Antarctic Oscillation index. Geophysical Research Letters. https://doi.org/10.1029/1999gl900003
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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