1. Project VERTIGO--Northwest Pacific KNOT SEEDS Bering Sea Sea of Okhotsk Kuroshio current Oyashio current Kamchatka peninsula

2. Major Asian dust storms pass over the Northwest Pacific (April 2001) x K2

3. … though some years less than others (April 2005) x K2

4. … though some years less than others (May 2005) x K2

5. … though some years less than others (June 2005) x K2

6. … and not when we were there (July 2005) x K2

7. Satellite chlorophyll April-Sept 2005 AprilMayJune JulyAugSept

8. MULVFS#9 Stn K2- Particulate Fe Stn K2- 228 Ra Stn K2- Particulate Mn Peak in 228 Ra and particulate Mn, Fe at 135m Stn K2- Density Mn and 228 Ra are both shelf tracers Fe from the shelf too? Which shelf? Data from Matt Charette Data from Jim Bishop and Phoebe Lam CTD data from cruise

10. Tying Okhotsk to K2 to Kamchatka shelves x K2 K2 The 26.661-26.761 density layer intersects with both the Okhotsk shelf (left) and Kamchatka shelf (right), though Kamchatka waters have less far to go (Okhotsk needs to recirculate) x

11. K1-K2-K3 Radium van Beek P., François R., Honjo S., Reyss J.-L., Honda M., Charette M. JPAC project; Mirai cruise 2002; in prep. Subsurface Ra-228 K1 < Ra-228 K2 < Ra-228 K3 Argues against Kamchatka shelf as source Where is K3 getting its Ra, and is it feeding K2?

12. K1-K3 sigtheta mirai cruise x x

13. K3 from Kuroshio mirai cruise x

14. Project VERTIGO--Northwest Pacific Cruise to “K2” in July- Aug 2005 KNOT SEEDS Stn K2- MULVFS Fe Stn KNOT- Nishioka et al. 03 ?