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September 11 - October 4, 2006
The ECOHAB-PNW 6 cruise was unique in several ways: first-surface nutrients were extremely high farther offshore and also farther northwestward than we have previously observed. In addition: diatoms of the Pseudo-nitzschia (PN) genus were the least abundant in the eddy region of all four fall ECOHAB-PNW cruises. Finally, domoic acid concentrations were the lowest we have observed in the eddy region. Cell numbers, domoic acid concentrations and chlorophyll were all higher near the Washington (WA) coast than in the eddy, as in September 2005; however, values were much lower this fall than in fall 2005.
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The sixth, and final, ECOHAB Pacific Northwest cruise took place in September 2006 aboard the R/V Thompson. The Thompson left Seattle at 7:30 PM PDT September 11 and returned to Seattle at 10:00 AM October 4. The chief scientist was Barbara Hickey