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A Seasonal Nitrate Climatology For Georges Bank James J. Bisagni University of Massachusetts Dartmouth Physics Department & School for Marine Science and.

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Presentation on theme: "A Seasonal Nitrate Climatology For Georges Bank James J. Bisagni University of Massachusetts Dartmouth Physics Department & School for Marine Science and."— Presentation transcript:

1 A Seasonal Nitrate Climatology For Georges Bank James J. Bisagni University of Massachusetts Dartmouth Physics Department & School for Marine Science and Technology New Bedford, Massachusetts, USA Supported by the National Science Foundation US-GLOBEC NW Atlantic Georges Bank Program

2 Benthivorous Fish Pelagic Invertebrate Predators Micro- Phytoplankton (>20  m) Seabirds Deposit-feeding Benthos Suspension- feeding Benthos Detritus Ammonia Fishing R Micro- Zooplankton (2-200  m) Meso- Zooplankton (>200  m) Nitrate Nano- Phytoplankton (<20  m) Planktivorous Fish Piscivorous Fish Pre-recruits Marine Mammals spawning recruitment Collie Bisagni Steele & Beet GLOBEC Phase 4 Workshop November 2003 Fogarty & Stockhausen Collie

3 MAY Tidal Mixing FrontsSEP Tidal Mixing Fronts (After Mavor et al., 2001)

4 (After Bisagni et al., 2001)

5

6 Well-Mixed Period: NOV-APR Crest Domain Inner Domain Outer Domain

7 Well-Mixed Period: NOV-APR Crest Domain Inner Domain Outer Domain

8 Well-Mixed Period: NOV-APR Crest Domain Inner Domain Outer Domain

9 Well-Mixed Period: NOV-APR Crest Domain Inner Domain Outer Domain

10 Episodically-Stratified Period: MAY-JUN Crest Domain Inner Domain Outer Domain

11 Episodically-Stratified Period: MAY-JUN Crest Domain Inner Domain Outer Domain

12 Episodically-Stratified Period: MAY-JUN Crest Domain Inner Domain Outer Domain

13 Episodically-Stratified Period: MAY-JUN Crest Domain Inner Domain Outer Domain

14 Stratified Period: JUL-OCT Crest Domain Inner Domain Outer Domain

15 Stratified Period: JUL-OCT Crest Domain Inner Domain Outer Domain

16 Stratified Period: JUL-OCT Crest Domain Inner Domain Outer Domain

17 Stratified Period: JUL-OCT Crest Domain Inner Domain Outer Domain

18

19 Acknowledgements Special thanks to: B. Petrie, Bedford Institute of Oceanography, and D. Townsend, University of Maine, for providing hydrographic and nitrate data. This work is supported by the National Science Foundation US-GLOBEC NW Atlantic Georges Bank Program

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