Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 49, Issue 22, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2022GL100121
Keywords
Brazil Basin; inverse model; planetary vorticity; AABW; WOCE
Categories
Ask authors/readers for more resources
The abyssal circulation in the interior portions of the Brazil Basin and northern Argentine Basin were estimated using an overdetermined inverse method conserving neutral surface planetary potential vorticity and salinity. This study found that the Antarctic Bottom Water flows with a northward component through 30 degrees S west of the Rio Grande Rise, but southward transport in the upper part of the AABW across 30 degrees S. The implications of reduced northward transport through the Hunter Channel on the heat budget suggest less diapycnal mixing across the warmer AABW classes.
The abyssal circulation in the interior portions of the Brazil Basin and northern Argentine Basin were estimated using an overdetermined inverse method conserving neutral surface planetary potential vorticity and salinity. Antarctic Bottom Water (AABW) flows with a northward component through 30 degrees S west of the Rio Grande Rise (RGR), as expected. However, in the area east of the RGR, the model shows southward transport in the upper part of the AABW across 30 degrees S. This finding suggests that previous calculations of northward transport through Hunter Channel reaching the broader Brazil Basin may be overestimates. Reduced northward transport through the Hunter Channel has significant implications for the heat budget, implying less diapycnal mixing across the warmer AABW classes, compared to earlier studies.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available