Yet during winter convective mixing, nutrients penetrate the euphotic zone, causing a short-lived phytoplankton bloom in the spring.

In some cases a post-hurricane phytoplankton bloom due to increased nutrient availability may perhaps be detectable.

The phytoplankton bloom usually lags the upwelling event by 1 to 4 days and blooms for 4 to 10 days.

The chlorophyll concentration increases during this time due to a phytoplankton bloom season and larger amount of primary production.

A large phytoplankton bloom was triggered, however this bloom did not contain diatoms because the fertilized location was already depleted in silicic acid, an essential nutrient for diatom growth.