Variation of Positions and Structures of the Oceanic Fronts in the Indian Ocean Sector of the Southern Ocean in the Period from 1965 to 1987

Nagata, Yutaka; Michida, Yutaka; Umimura, Y.

doi:10.1007/978-3-642-73724-4_7

Cited by 33 publications

(26 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the spatial variation of the STFs is consistent with that found in BG96 ( Figure 6). The interannual variability of the STF position is quite small compared to the range of 36˚ to 42˚S found along 110˚E by Nagata et al (1988). The STF falls in the climatological Ekman convergent zone.…”

Section: The Subtropical Front (Stf)mentioning

confidence: 69%

“…The temperature changes from 6˚ to 10˚C across the front below 200m for all three sections. This range is warmer than that observed along 110˚E by the Japanese (Nagata et al, 1988) and the temperature averaged in the Southern Ocean (Orsi et al 1995). Salinity sampling is too sparse to locate the SAF precisely in the salinity sections; the salinity varies from 34.2 to 34.7 across the front.…”

Section: The Subantarctic Front (Saf)mentioning

confidence: 74%

“…The SAF identified in 1998 and 2000 is a couple of degrees of latitude north of the BG96 SAF, while the SAF in 2002 is slightly south of the BG96 SAF ( Figure 6). Again, the temporal variability of the SAF is quite small relative to that found by Nagata et al (1988), who defined the SAF as T 100 =7˚C. The frontal definition may contribute to the large variability in the front position since individual isotherms may have larger variation than the water mass structure itself.…”

Section: The Subantarctic Front (Saf)mentioning

confidence: 80%

“…The frontal definition may contribute to the large variability in the front position since individual isotherms may have larger variation than the water mass structure itself. On the other hand, Nagata et al (1988) had a time series of 22 years, giving more opportunity for larger variations.…”

Section: The Subantarctic Front (Saf)mentioning

confidence: 99%

“…For more than three decades, Japanese scientists have been sampling temperature profiles in the upper 400 meters annually with XBT (MBT in early years) probes along the cruise tracks of the supply ships. These series revealed that the position of major fronts varied interannually (Nagata et al, 1988) and that a long-term trend and 4-5 year cycle variability were present in the upper ocean temperature field (Aoki, 1997).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Upper ocean thermohaline structure and its temporal variability in the southeast Indian Ocean

Yuan¹,

Martinson²,

Dong³

2004

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

We examine the upper ocean thermohaline structure in the southeast Indian Ocean and its We find a strong temporal variation in the upper ocean thermal structure in the polar ocean southeast the Kerguelen Plateau. The depths of the mixed layer and T min layer increase over time. The mixed layer temperature decreases while the T min temperature increases during the same period. In addition, we see an increase from 1998 to 2002 in the length of the ice-free period prior to each XBT/XCTD sampling and surface wind forcing, calculated as the friction velocity cubed during the ice-free period. Our analysis suggests that the longer the ocean is exposed to the atmosphere and the stronger the wind stirring, the more enhanced is the turbulent mixing. This results in a greater mixed layer depth and more entrainment of colder water from the T min layer to the mixed layer. This surface forcing also enhances internal diffusive processes that mix the T min water with the warmer waters above and below the T min layer. The surface forcing is apparently dominant in determining the upper ocean thermal structure in this polar region.

show abstract

Section: The Subtropical Front (Stf)mentioning

confidence: 69%

Section: The Subantarctic Front (Saf)mentioning

confidence: 74%

Section: The Subantarctic Front (Saf)mentioning

confidence: 80%

Section: The Subantarctic Front (Saf)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations