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Jim Greenwood , Richard Matear, Chaojiao Sun, Liejun Zhong, James McLaughlin

Impact of sub- mesoscale upwelling on phytoplankton production along an oligotrophic boundary current. Jim Greenwood , Richard Matear, Chaojiao Sun, Liejun Zhong, James McLaughlin. CSIRO Marine and atmospheric research / wealth from oceans. May 2013. Eddy kinetic energy. Latitude.

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Jim Greenwood , Richard Matear, Chaojiao Sun, Liejun Zhong, James McLaughlin

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  1. Impact of sub-mesoscale upwelling on phytoplankton production along an oligotrophic boundary current Jim Greenwood, Richard Matear, Chaojiao Sun, Liejun Zhong, James McLaughlin CSIRO Marine and atmospheric research / wealth from oceans May 2013

  2. Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 2

  3. Eddy kinetic energy Latitude Australia Longitude Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 3

  4. High productivity of anti-cyclonic eddies Chla (mg/m3) Western Australia SeaWiFS image Greenwood et al. 2007 DSR II 54 Dietze et al. 2009 DSR I 56 Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 4

  5. Vertical velocity at 150 m m/day m/day Chla α Paterson et al. 2008 JGR 113 Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 5

  6. High productivity at eddy perimeters Sea surface height (m) Productivity “hot-spots” Lourey et al. 2013 Mar Biol. 160 Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 6

  7. Questions: What is the extent of vertical motions? How do they contribute to the overall productivity of the region? Can they explain the patchy productivity results? Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 7

  8. Regional model (2 km resolution) model Model SST climatology Satellite SST Temperature (degrees C) Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 8

  9. Regional model (2 km resolution) % tracer in upper 100 m after 10 days Initial tracer condition Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 9

  10. Regional model (2 km resolution) example of daily mean vertical velocity and density at 200 m W (m/day) Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 10

  11. Regional model time evolution of vertical velocity and density at 200 m day 0 day 2 day 4 day 6 day 8 day 10 day 12 day 14 day 16 w (m/day) Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 11

  12. Regional model Seasonal variation in vertical motions upward downward net Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 12

  13. Global model (10 km resolution) example of daily mean vertical velocity and density at 200 m regional model 2km resolution W (m/day) Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 13

  14. Regional vsGlobal Seasonal variation in vertical motions upward downward net Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 14

  15. Regional model Maximum potential production compared with measurements Production (mg C/m2/d) Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 15

  16. Regional model (2 km resolution) % tracer in upper 100 m after 10 days Initial tracer condition Sub-mesoscale upwelling and phytoplankton production | Jim Greenwood | Page 16

  17. Thank you Jim Greenwood t +61 8 9333 6564 e jim.greenwood@csiro.au • CSIRO Marine and atmospheric research / wealth from oceans

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