Calanus finmarchicus diapause stock
in the Gulf of Maine
crashed during Autumn 1998

HYPOTHESIS:
C. finmarchicus - an indicator of climate-driven changes in ocean circulation?

	Since shelf populations of C. finmarchicus are not self-sustaining and must be supplied every year or every few years from external sources, we hypothesize that their fluctuations in abundance reflect climate-driven changes in ocean circulation.

The North Atlantic Oscillation (NAO)

North Atlantic Ocean Circulation Responses to the NAO

The Winter NAO Index

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The ‘98 Event

The ‘98 Event

The ‘98 Event

The ‘98 Event

The ‘98 Event

The ‘98 Event

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NW Atlantic’s
Coupled Slope Water System

Time Series of the NAO Index and the
Regional Slope Water Temperature Index

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Predicting the Response
of the Coupled Slope Water System to the NAO

Continuous Plankton Recorder (CPR) Survey of the North Atlantic

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