US Army Corps of Engineers
Portland District

Extreme climatic events

Graphic representation of the Disturbance Sub-modelExtreme climatic events include rare precipitation, temperature and storm events such as the El Nino Southern Oscillation.

The figure at right shows a conceptual model for historical and existing natural disturbance levels in the Columbia River (Johnson et al 2004).

Controlling factors that are affected by extreme climatic events:

Contact information

Ronald Thom, Ph.D
360-681-3657

Marine Research Operations, PNNL
1529 W. Sequim Bay Rd.
Sequim, WA 98382