|
|
|
|
|
| Rintoul, Stephen R.; Sokolov, Serguei; Massom, Robert A.. |
| An extraordinary sea ice tongue developed near 85 degrees E over a period of 30 days in April-May 2002. The ice tongue extended to the north more than 800 km from the surrounding ice edge and covered an area greater than 200,000 km 2. Satellite measurements of ice extent and roughness characteristics demonstrate that the tongue persisted as a distinct feature throughout the winter. Remote sensing observations between 1978 and 2004 confirm that ice tongues occur frequently at this location, although the 2002 tongue was particularly pronounced. We show that ocean currents and winds conspire to favor the development of ice tongues at this location. Mean streamlines of the southern part of the Antarctic Circumpolar Current turn sharply to the north near 85... |
| Tipo: Text |
Palavras-chave: Antarctic sea ice; Ice tongue; Ice advection. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00253/36388/34930.pdf |
| |
|
|
| Sokolov, Serguei; Rintoul, Stephen R.. |
| Maps of the gradient of sea surface height (SSH) and sea surface temperature (SST) reveal that the Antarctic Circumpolar Current (ACC) consists of multiple jets or frontal filaments. The braided and patchy nature of the gradient fields seems at odds with the traditional view, derived from hydrographic sections, that the ACC is made up of three continuous circumpolar fronts. By applying a nonlinear fitting procedure to 638 weekly maps of SSH gradient (del SSH), it is shown that the distribution of maxima in del SSH (i.e., fronts) is strongly peaked at particular values of absolute SSH (i.e., streamlines). The association between the jets and particular streamlines persists despite strong topographic and eddy - mean flow interactions, which cause the jets to... |
| Tipo: Text |
Palavras-chave: Jets; Currents; Sea surface temperature; Ocean circulation. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00235/34616/32952.pdf |
| |
|
|
| Sokolov, Serguei; Rintoul, Stephen R.. |
| High resolution hydrographic sections and maps of the gradient of sea surface height (SSH) reveal that the Antarctic Circumpolar Current (ACC) consists of multiple jets or frontal filaments. Here we use a 15 year time series of SSH observations to determine the circumpolar structure and distribution of the ACC fronts. The jets are consistently aligned with particular streamlines along the entire circumpolar path, confirming and extending the results of an earlier study restricted to the region south of Australia. The intensity of the fronts (as measured by the cross-front gradient of SSH) varies along the fronts and the individual branches merge and diverge, often in response to interactions with bathymetry. Maps of absolute velocity at 1000 m depth... |
| Tipo: Text |
Palavras-chave: Southern Ocean; Antarctic Circumpolar Current. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00253/36387/34931.pdf |
| |
|
|
|
