Subantarctic Mode Water - Impact of Climate Change

Impact of Climate Change

The Subantarctic Mode Water acts as a carbon sink, absorbing atmospheric carbon dioxide and storing it in solution. In the event of global heating due to climate change, the amount of carbon dioxide that the SAMW is able to absorb will lessen. Downes et al. (2009) found that through climate modeling, in the event of a doubling of atmospheric carbon dioxide concentration the Subantarctic Mode water will decrease in density and salinity.

  • Salinity (colors) and temperature (contours) at 50E, illustrating the low stratification layer associated with the Subantarctic Mode Water at this longitude.

  • Salinity (colors) and temperature (contours) at 170W, showing that the SAMW is much closer in temperature to the salinity minimum associated with the Antarctic Intermediate Water.

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