KOPRI Repository

Variability of the Antarctic Coastal Current (AACC) and its causes in the Amundsen Sea

Cited 0 time in wos
Cited 0 time in scopus
Metadata Downloads
Variability of the Antarctic Coastal Current (AACC) and its causes in the Amundsen Sea
Other Titles
아문젠해 남극연안류 변동성과 그원인
Kim, Chang-Sin
Lee, Sang H.
Yang, Heewon
Kim, Tae-Wan
Issue Date
Kim, Chang-Sin, et al. 2015. Variability of the Antarctic Coastal Current (AACC) and its causes in the Amundsen Sea. 2015 IUGG IAPSO. 프라하. 2015.06.25~2015.07.03.
The Antarctic Coastal Current (AACC) or east wind drift flows westward around Antarctica. Coastal current is mainly barotropic component by the wind driven Ekman transport (Sverdrup 1953) and baroclinic component is generated by a density gradient between Antarctic Surface Water and Shelf Water (Fahrbach et al., 1992). Ismael and Fahrbach (2009) show the contribution of the mechanisms driving the coastal and its seasonality in the Weddell Sea. Therefore, the present study attempts to quantify the contribution of the mechanisms driving the AACC and its seasonality and decadal variation of coastal current in the Amundsen Sea. We evaluated variability of coastal current and its driving forcing in the Amundsen Sea using observed and calculated ocean current. The observation data was collected here was obtained from KOPRI mooring stations in the Dotson Trough (DT), which is one of the deep troughs in the Amundsen shelf. The westward current shows in front of the Dotson ice shelf (DIS) and it strong seasonal variation. The seasonality of the AACC was well matched with the seasonality of the pressure gradient in the DT. We calculated the surface ocean currents to understand decadal time scale variation of the AACC, which was the difficult to observe below sea-ice using the satellite data. We used a simplified linear formula to understand the relationship between the sea ice motion and sea surface wind as Kimura (2004). This previous study was evaluated relationship using sea ice properties about speed reduction factor and turning angle in the Southern Ocean. Although the estimated coastal current speed was smaller than observation, decadal time scale of the westward flow of the coastal current was increased.
Conference Name
Conference Place
Conference Date
Files in This Item
There are no files associated with this item.
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.