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A MANDA H YDE, U NIVERSITY O F N EW H AMPSHIRE (UNH) A M ULTIYEAR A SSESSMENT O F B IOLOGICAL P ERTURBATIONS O F C O 2 I N T HE N ORTHEAST C HANNEL O F.

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Presentation on theme: "A MANDA H YDE, U NIVERSITY O F N EW H AMPSHIRE (UNH) A M ULTIYEAR A SSESSMENT O F B IOLOGICAL P ERTURBATIONS O F C O 2 I N T HE N ORTHEAST C HANNEL O F."— Presentation transcript:

1 A MANDA H YDE, U NIVERSITY O F N EW H AMPSHIRE (UNH) A M ULTIYEAR A SSESSMENT O F B IOLOGICAL P ERTURBATIONS O F C O 2 I N T HE N ORTHEAST C HANNEL O F T HE G ULF O F M AINE Co-authors: Douglas Vandemark (UNH), Shawn Shellito (UNH), Joseph Salisbury (UNH), James Irish (UNH), Michael DeGrandpre (University of Montana)

2 O UTLINE Motivation Controls on CO 2 and pCO 2 Northeast Channel – Unique Dataset Buoy N Instrument Cluster QC pCO 2 QC O 2 DIC Models Summary

3 M OTIVATION Achieve a fuller understanding the air-sea fluxes of CO 2 on the continental shelves (Previdi et al. 2009) Better observations of physical, chemical, and biological processes contributing to CO 2 fluctuations in the coastal oceans (Fennel et al. 2008) Lacking high temporal and spatial resolution data on continental shelves (Previdi et al. 2009) Vandemark et al Journal of Geophysical Research 116 Fennel et al Geophysical Research Letters 35; Previdi et al Journal of Geophysical Research 114

4 C ONTROLS O N CO 2 A ND P CO 2 Controls can be: Physical Biological Chemical (Álvarez et al Deep-Sea Research II 49: ; DeGrandpre et al Limnology Oceanography 42: 21-28; Fennel et al Geophysical Research Letters 114; Morel and Hering 1993) Equations of the carbon system: CO 2(g) = CO 2(aq) pCO 2 = [CO 2(aq) ]/ K H CO 2 + H 2 O = H 2 CO 3 * = HCO H + = CO H + TCO 2 = DIC = H 2 CO 3 * + HCO CO 3 2-

5 N ORTHEAST C HANNEL, G ULF O F M AINE pCO 2 Deployment Sites of the Gulf of Maine & Scotian Shelf UNH/PMEL Halifax NE Channel Provided by: Doug Vandermark

6 B UOY N I NSTRUMENTS UNH Instrument Cluster Depth: 3-5m. SAMI-CO 2 Sensor (Sunburst, LLC) Oxygen Optode 3835 (Aanderraa Instruments) Provided by: Shawn Shellito UMO: gyre.umeoce.maine.edu

7 Q UALITY C ONTROL O F P CO 2 Data sent to Cory Beatty at University of Montana Smoothed all the calibration errors out of data

8 Q UALITY C ONTROL O F O 2

9 T IME S ERIES O F DIC (U SING P CO 2, S ALINITY, A ND M ODELS )

10 C ONTROLS O N DIC Entrainment Spring Bloom and Decay Respiration Production

11 S UMMARY Data look good overall Inverse biofouling seen and rectified on O 2 data Physical and biological controls on DIC apparent Future Goals Add data O 2 and CO 2 for biological DIC controls investigation (Carrillo et al. 2004) O 2, temperature, salinity, and current data for water mass CO 2 controls

12 A CKNOWLEDGEMENTS Funding: UNH/NASA Research and Discover Program NFS Grant OCE Neil Pettigrew and the Physical Oceanography Group at the University of Maine, Orono Cory Beatty (University of Montana) Helmuth Thomas and Elizabeth Shadwick (Dalhousie University)


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