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Subtropical dipole mode in the Southern Hemisphere: A global view
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| Zeitschriftentitel: | Geophysical Research Letters |
|---|---|
| Personen und Körperschaften: | |
| In: | Geophysical Research Letters, 37, 2010, 10 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Wang, F. Wang, F. |
|---|---|
| author |
Wang, F. |
| spellingShingle |
Wang, F. Geophysical Research Letters Subtropical dipole mode in the Southern Hemisphere: A global view General Earth and Planetary Sciences Geophysics |
| author_sort |
wang, f. |
| spelling |
Wang, F. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1029/2010gl042750 <jats:p>A global wavenumber‐3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high‐pressures, in which the latent heat flux play a leading role through wind‐induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied.</jats:p> Subtropical dipole mode in the Southern Hemisphere: A global view Geophysical Research Letters |
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10.1029/2010gl042750 |
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Geophysical Research Letters |
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| title |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_unstemmed |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_full |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_fullStr |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_full_unstemmed |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_short |
Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_sort |
subtropical dipole mode in the southern hemisphere: a global view |
| topic |
General Earth and Planetary Sciences Geophysics |
| url |
http://dx.doi.org/10.1029/2010gl042750 |
| publishDate |
2010 |
| physical |
|
| description |
<jats:p>A global wavenumber‐3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high‐pressures, in which the latent heat flux play a leading role through wind‐induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied.</jats:p> |
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| container_title | Geophysical Research Letters |
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| description | <jats:p>A global wavenumber‐3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high‐pressures, in which the latent heat flux play a leading role through wind‐induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied.</jats:p> |
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| imprint | American Geophysical Union (AGU), 2010 |
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| publishDate | 2010 |
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| series | Geophysical Research Letters |
| source_id | 49 |
| spelling | Wang, F. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1029/2010gl042750 <jats:p>A global wavenumber‐3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high‐pressures, in which the latent heat flux play a leading role through wind‐induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied.</jats:p> Subtropical dipole mode in the Southern Hemisphere: A global view Geophysical Research Letters |
| spellingShingle | Wang, F., Geophysical Research Letters, Subtropical dipole mode in the Southern Hemisphere: A global view, General Earth and Planetary Sciences, Geophysics |
| title | Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_full | Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_fullStr | Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_full_unstemmed | Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_short | Subtropical dipole mode in the Southern Hemisphere: A global view |
| title_sort | subtropical dipole mode in the southern hemisphere: a global view |
| title_unstemmed | Subtropical dipole mode in the Southern Hemisphere: A global view |
| topic | General Earth and Planetary Sciences, Geophysics |
| url | http://dx.doi.org/10.1029/2010gl042750 |