Using Integrated Approaches of In-situ Observations, Laboratory Experiments and Modeling to Study Atmospheric Iron and Its Input to the Ocean: A New Lesson Learned from the Southern Ocean and Coastal Antarctica
The Southern Ocean, surrounding Antarctica, plays an important role in regulating the global nitrogen and carbon cycles. The vast Southern Ocean is a HNLC region where phytoplankton growth is partially limited by micronutrient Fe. This region is extremely under-sampled due to its vast area and rough atmospheric and oceanic conditions for in situ observations, hindering the accurate estimate of the atmospheric dissolved Fe input. In this presentation, we will discuss our results of atmospheric Fe from recent shipboard aerosol measurements in the Southern Ocean and coastal East Antarctica. We will explore the interactions of different aerosol components and possible processes affecting atmospheric Fe solubility, and our thoughts on existing questions and future studies in the regions will also be shared.