Impact of the Antarctic Ozone Hole on the Southern Ocean

Session ID#: 28758

Session Description:
Over the last decade research has suggested that the Antarctic ozone hole has impacted the Southern Ocean. We will review both observational and modeling evidence for an ozone hole-ocean connection. In particular, we will discuss how the stratospheric cooling resulting from lower ozone produce changes in surface winds. These changes in winds result in two timescales of response in ocean temperature- an initial cooling and a longer-term warming. These responses vary across different models, and we examine reasons why this might be the case-implicating both oceanic and atmospheric physics. Finally, we look at the implications of the circulation changes for biogeochemical cycles, in particular the uptake of anthropogenic carbon dioxide. While the net impact of the ozone hole in our models is small, changes to both the biological and solubility pumps may complicate efforts to properly detect the true change in anthropogenic carbon uptake.
Primary Presenter:  Anand Gnanadesikan, Johns Hopkins University, Department of Earth and Planetary Sciences, Baltimore, MD, United States
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1620 Climate dynamics [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]
  • AI - Air-Sea Interactions
  • BN - Biogeochemistry and Nutrients
  • OM - Ocean Modeling
  • PC - Past, Present and Future Climate

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