The same off-line methodology employed to investigate Bottom Water and Deep Water ventilation pathways, are used here to investigate the penetration at intermediate depths of AAIW.
REGIONS
Percentage tracer distributions after 500 years:
Region III
SUB-REGIONS

1. 80 Year animation of tracer on multiple sigma levels (26.6; 26.8; 27.0; 27.2; 27.4; 27.8) from source subregions:
IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIID, IIIE, IIIF (NB. No significant spreading occurs from IIIB or IIIC subregions)

2. Zonal sections every 5 degrees of longitude from sub-regions after 80 years (middle - region II, bottom region III):
A, B, C, D, E, F

3. Year 80 percentage tracer distributions. Common colorbar:

Sigma 26.6: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF
Sigma 26.8: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF
Sigma 27.0: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF
Sigma 27.2: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF
Sigma 27.4: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF
Sigma 27.6: IIA, IIB, IIC, IID, IIE, IIF, IIIA, IIIB, IIIC, IIID, IIIE, IIIF

OLD STUFF

Two experiments are shown here that follow the evolution of a passive dye tracer, released in the off-line model's surface layer:
aaiw60 - surface tracer released circumpolarly, south of 60°S
aaiw45 - surface tracer released circumpolarly, between 45°S and 60°S
FIRST 400yrs, WORK, WORK_MLD , sub-region animation