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Record #179707:

Frontal positions and mixed layer evolution in the seasonal ice zone along 140°E in 2001/02 / Shigeru Aoki, Stephen R. Rintoul, Hiroshi Hasumoto, Hideki Kinoshita.

Title: Frontal positions and mixed layer evolution in the seasonal ice zone along 140°E in 2001/02 / Shigeru Aoki, Stephen R. Rintoul, Hiroshi Hasumoto, Hideki Kinoshita.
Author(s): Aoki, Shigeru.
Rintoul, Stephen R.
Hasumoto, Hiroshi.
Kinoshita, Hideki.
Date: 2006.
In: National Institute of Polar Research. Polar Bioscience. (2006.), Vol. 20 (2006)
Abstract: Describes circulation and seasonal development of upper ocean in seasonal ice zone (SIZ) of Australian sector of Southern Ocean from early spring to autumn. Circulation in region is dominated by southern branch of Polar Front (PF-S); northern branch of Southern Antarctic Circumpolar Current front (aACCf-N) which roughly corresponds with winter sea ice edge; and the closely-spaced southern branch of sACCf, southern boundary of ACC, and Antarctic Slope Front (ASF). Vigorous cyclonic eddies were identified between sACCf-N and sACCf-S throughout the period. Changes in salinity made dominant contribution to changes in density in SIZ, and changes in temperature made largest contribution to density changes north of sACCf. Depth of mixed layer shoaled to South, and decrease in mixed layer depth occurred in series of steps. Seasonal variability in depth of mixed layer was strongest north of sACCf, where summer warming formed strong seasonal thermocline above relatively deep winter water layer. In SIZ mixed layer became warmer, fresher and lighter in summer but depth of mixed layer remained at about 50 m throughout year. Freshest surface water were in SIZ in January immediately following melt and retreat of sea ice pack. Mixed layer salinity increase from January to March probably reflects effect of mixing with saltier waters below mixed layer. Mixed layer depths south of ASF were highly variable, both within and between seasons.
Notes:

National Institute of Polar Research. Polar Bioscience. Vol. 20 :1-20 (2006).

Keywords: 551.46 -- Oceanography, physical.
551.465 -- Oceanography, dynamics.
551.465.4 -- Oceanography, stratification.
551.465.5 -- Ocean currents.
551.465.15 -- Turbulence and eddies.
551.464.5 -- Salinity.
551.463.6 -- Sea water, thermal properties and heat flux.
551.462.33 -- Continental slopes.
551.326.7 -- Sea ice.
91(08) -- Expeditions: 1956- Japanese Antarctic Research Expeditions.
91(08) -- Expeditions: 2001-02 JARE.
C -- Oceanography, hydrography and hydrology.
(*7) -- Antarctic regions.
(*80) -- Southern Ocean.
(*86) -- Southern Ocean, Australian sector.
SPRI record no.: 179707

MARCXML

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035 ## ‡aSPRI-179707
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245 00 ‡aFrontal positions and mixed layer evolution in the seasonal ice zone along 140°E in 2001/02 /‡cShigeru Aoki, Stephen R. Rintoul, Hiroshi Hasumoto, Hideki Kinoshita.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2006.
300 ## ‡ap. 1-20 :‡bill., diags., table.
500 ## ‡aNational Institute of Polar Research. Polar Bioscience. Vol. 20 :1-20 (2006).
520 3# ‡aDescribes circulation and seasonal development of upper ocean in seasonal ice zone (SIZ) of Australian sector of Southern Ocean from early spring to autumn. Circulation in region is dominated by southern branch of Polar Front (PF-S); northern branch of Southern Antarctic Circumpolar Current front (aACCf-N) which roughly corresponds with winter sea ice edge; and the closely-spaced southern branch of sACCf, southern boundary of ACC, and Antarctic Slope Front (ASF). Vigorous cyclonic eddies were identified between sACCf-N and sACCf-S throughout the period. Changes in salinity made dominant contribution to changes in density in SIZ, and changes in temperature made largest contribution to density changes north of sACCf. Depth of mixed layer shoaled to South, and decrease in mixed layer depth occurred in series of steps. Seasonal variability in depth of mixed layer was strongest north of sACCf, where summer warming formed strong seasonal thermocline above relatively deep winter water layer. In SIZ mixed layer became warmer, fresher and lighter in summer but depth of mixed layer remained at about 50 m throughout year. Freshest surface water were in SIZ in January immediately following melt and retreat of sea ice pack. Mixed layer salinity increase from January to March probably reflects effect of mixing with saltier waters below mixed layer. Mixed layer depths south of ASF were highly variable, both within and between seasons.
650 07 ‡a551.46 -- Oceanography, physical.‡2udc
650 07 ‡a551.465 -- Oceanography, dynamics.‡2udc
650 07 ‡a551.465.4 -- Oceanography, stratification.‡2udc
650 07 ‡a551.465.5 -- Ocean currents.‡2udc
650 07 ‡a551.465.15 -- Turbulence and eddies.‡2udc
650 07 ‡a551.464.5 -- Salinity.‡2udc
650 07 ‡a551.463.6 -- Sea water, thermal properties and heat flux.‡2udc
650 07 ‡a551.462.33 -- Continental slopes.‡2udc
650 07 ‡a551.326.7 -- Sea ice.‡2udc
650 07 ‡a91(08) -- Expeditions: 1956- Japanese Antarctic Research Expeditions.‡2udc
650 07 ‡a91(08) -- Expeditions: 2001-02 JARE.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*80) -- Southern Ocean.‡2udc
651 #7 ‡a(*86) -- Southern Ocean, Australian sector.‡2udc
700 1# ‡aAoki, Shigeru.
700 1# ‡aRintoul, Stephen R.
700 1# ‡aHasumoto, Hiroshi.
700 1# ‡aKinoshita, Hideki.
773 0# ‡7nnas ‡tNational Institute of Polar Research. Polar Bioscience. ‡gVol. 20 (2006) ‡wSPRI-152313
916 ## ‡a2007/07/27 -- HS
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20221004 ‡bHS