Natural Variability

## "Natural" Variability and Anthropogenic Climate Change

U.S. GLOBEC intends to sort out natural variability in the physical and biological ecosystem from that caused by anthropogenic climate change.

U.S. GLOBEC selects study sites because:

- Long-term mean climatology of the region-for both physical and biological variables-is known.

- Sites have been studied extensively before-to permit comparison.

Our research strategy is to:

- Develop models and conduct retrospective data analysis.

- Conduct process-oriented research for ca. five years at each site to provide some understanding of high frequency variability.

- Monitor ocean physics and biology using ships and moored instruments.