Enhancement of phytoplankton primary productivity in the southern East China Sea following episodic typhoon passage
Article first published online: 4 JUN 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 11, June 2009
How to Cite
2009), Enhancement of phytoplankton primary productivity in the southern East China Sea following episodic typhoon passage, Geophys. Res. Lett., 36, L11603, doi:10.1029/2009GL037883., , and (
- Issue published online: 4 JUN 2009
- Article first published online: 4 JUN 2009
- Manuscript Accepted: 24 APR 2009
- Manuscript Revised: 15 APR 2009
- Manuscript Received: 22 FEB 2009
- Kuroshio movement;
- translation speed;
- meridional winds
 The enhancement of primary productivity (PPenh) in the southern East China Sea (ECS) following 16 typhoon passages was investigated using ocean color data and a primary productivity model. PPenh tended to be higher when typhoons traversed slowly with trajectories that allowed strong southerly winds to prevail over Yonaguni Island. Such long-lasting southerly winds were believed to push the Kuroshio current axis shelfward, enhancing the upwelling of nutrients, hence promoting new productivity (NP). The importance of long-lasting southerly winds as a proxy for physical perturbations underlying PPenh was expressed by an empirical equation by which 88% of PPenh variation could be explained. Applying this equation, we assessed that typhoon passages accounted for a minimum of 0.6–11.8% of the ECS summer–fall NP, suggesting that typhoon passage over the southern ECS is an important phenomenon supporting NP in the ECS.