 |
| Titel |
Satellite observations of the small-scale cyclonic eddies in the western South China Sea |
| VerfasserIn |
F. Liu, S. Tang, C. Chen |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 2 ; Nr. 12, no. 2 (2015-01-16), S.299-305 |
| Datensatznummer |
250117773
|
| Publikation (Nr.) |
 copernicus.org/bg-12-299-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| High-resolution ocean color observations offer an opportunity to investigate
the oceanic small-scale processes. In this study, the Medium Resolution
Imaging Spectrometer (MERIS) daily 300 m data were used to study small-scale
processes in the western South China Sea. It is indicated that the cyclonic
eddies with horizontal scales of 10 km are frequently observed during the
upwelling season of each year over the 2004–2009 period. These small-scale eddies were
generated in the vicinity of the southern front of the cold tongue, and then
propagated eastward with a speed of approximately 12 cm s−1. This
propagation speed was consistent with the velocity of the western boundary
current. As a result, the small-scale eddies kept the high levels of
phytoplankton rotating away from the coastal areas, resulting in the accumulation of
phytoplankton in the interior of the eddies. The generation of the
small-scale eddies may be associated with strengthening of the relative
movement between the rotation speed of the anticyclonic mesoscale eddies and
the offshore transport. With the increases of the normalized rotation speed
of the anticyclonic mesoscale eddies relative to the offshore transport, the
offshore current became a meander under the impacts of the anticyclonic
mesoscale eddies. The meandered cold tongue and instability front may
stimulate the generation of the small-scale eddies. Unidirectional uniform
wind along the cold tongue may also contribute to the formation of the
small-scale eddies. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|