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    Recent western South Atlantic bottom water warming

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    2006GL026769.pdf (1.680Mb)
    Date
    2006-07-28
    Author
    Johnson, Gregory C.  Concept link
    Doney, Scott C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/1213
    As published
    https://doi.org/10.1029/2006GL026769
    Related Material/Data
    https://hdl.handle.net/1912/3338
    DOI
    10.1029/2006GL026769
    Keyword
     Antarctic bottom water; Brazil Basin; Atlantic Ocean 
    Abstract
    Potential temperature differences are computed from hydrographic sections transiting the western basins of the South Atlantic Ocean from 60°S to the equator in 2005/2003 and 1989/1995. While warming is observed throughout much of the water column, the most statistically significant warming is about +0.04°C in the bottom 1500 dbar of the Brazil Basin, with similar (but less statistically significant) warming signals in the abyssal Argentine Basin and Scotia Sea. These abyssal waters of Antarctic origin spread northward in the South Atlantic. The observed abyssal Argentine Basin warming is of a similar magnitude to that previously reported between 1980 and 1989. The Brazil Basin abyssal warming is similar in size to and consistent in timing with previously reported changes in abyssal southern inflow and northern outflow. The temperature changes reported here, if they were to hold throughout the abyssal world ocean, would contribute substantially to global ocean heat budgets.
    Description
    Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L14614, doi:10.1029/2006GL026769.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Geophysical Research Letters 33 (2006): L14614
     

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