Dynamics of the summer shelf circulation and transient upwelling off Ningaloo Reef, Western Australia

Research off Ningaloo Reef reveals that northward wind-driven currents periodically reverse the coastal flow, triggering transient upwelling—a rare phenomenon along Western Australia's coast. This process is driven by interactions between the southward-flowing Leeuwin Current and strong northward winds, leading to cooling of coastal waters. The study combined field observations from moorings with nested numerical models (ROMS) to capture mesoscale dynamics influencing shelf circulation. Findings indicate that upwelling sources nutrients from deeper water layers, likely affecting Ningaloo Reef's ecosystems due to the region's steep shelf slope and strong summer stratification.

Xu, J., Lowe, R. J., Ivey, G. N., Pattiaratchi, C., Jones, N. L., & Brinkman, R. (2013). Dynamics of the summer shelf circulation and transient upwelling off Ningaloo Reef, Western Australia. Journal of Geophysical Research: Oceans, 118(3), 1099–1125. Portico. https://doi.org/10.1002/jgrc.20098