Parker MacCready works to advance fundamental understanding of estuarine and coastal physical oceanography. He works closely with biologists and chemists to link patterns of circulation and mixing to biogeochemical processes such as ocean acidification, hypoxia, and harmful algal blooms. With his colleagues in the UW Coastal Modeling Group he creates realistic numerical simulations of coastal and estuarine waters, allowing an unprecedented exploration of these complex processes, particularly in the Pacific Northwest.