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Recent advances in technology have allowed us to survey physical, biological and chemical properties of estuary systems such as Great Bay with very high spatial resolution. The UNH Coastal Ocean Observing Center’s CCTI project has conducted multiple surveys, during a wide range of climate and flow conditions. Chris Hunt, Joe Salisbury, Doug Vandemark, Ru Morrison, Janet Campbell University of New Hampshire [email protected] Figure 2. R/V Camden Belle Figure 4. Flow-through system equipped to measure Fl-Chl, Fl- CDOM, beam attenuation, DO, Temp, and Salinity. Seawater is pumped through the system from below the boat at a rate of 20L/min. Get these plots, reports, and lots of other information at: Coastal Carbon Terrestrial Influence Project www.ccg.unh.edu Figure 3. Fast equilibrator for continuous pCO2 measurements. Physical Observations Chemical Observations After a drought: Oct 4-6, 2005 After spring runoff: April 7 & 10, 2006 After a historic flood: June 5-6, 2006 Biological Observations -70.95° -70.9° -70.85° -70.8° 43.05° 43.1° 43.15° 43.2° Ju n e 2006 K ey (C ells/m L) 20 0 .0 20.0 2.0 D in o flag ellates -70.95° -70.9° -70.85° -70.8° 43.05° 43.1° 43.15° 43.2° 2 00 .0 20 .0 2.0 D in o flag ellates A p ril2 00 6 K ey (C ells/m L) -70.95° -70 .9 ° -70.85° -70.8° 4 3 .0 5° 4 3 .1° 4 3 .1 5° 4 3 .2° 6000 600 60 D in o flag ellates K ey (C ells/m L) -70 .95 ° -70.9° -7 0.8 5 ° -70 .8° 43.05° 43.1° 43.15° 43.2° 14.0 1 .2 0 .0 0 .1 0 .1 1 4 .8 38.4 3 .2 3 8 .9 0 .8 0 .6 9 2 .7 2 .4 6 9 .2 A c artia longiremis D en s ity (# /m ^3) -70.95° -70.9° -70.85° -7 0.8 ° 43.05° 43.1° 43.15° 43.2° 1 1 .5 4 .1 9 .8 8 .1 0 .0 Acartia hudsonica D e n s ity (# /m ^3) 1 0 A p ril20 0 6 -70.95° -70.9° -70.85° -70.8° 43.05° 43.1° 43.15° 43.2° 0 .0 2 3 4 6 .2 1 9 .1 1 7 .4 4 7 2 0 .0 7162.1 1 9 2 0 .0 7 7 8 5 .0 Acartia tonsa D e n s ity (# /m ^3) 5 -6 Ju n e 2006 Salinity (psu) Temp (C) F-CDOM (ppb) Oct 2005 April 2006July 2006 Oct 2005 April 2006 July 2006 pCO2 (uatm) Observations of physical properties include continuous salinity, temperature, beam attenuation. Discrete measurements of total suspended solids and particulate absorbance were also taken, along with profiles. We sample chemical properties including continuous oxygen and chromophoric dissolved organic matter fluorescence (f-CDOM). In addition, we made discrete measurements of nutrients, dissolved organic carbon, dissolved inorganic carbon, alkalinity, and particulate organic carbon. Results •The Great Bay Rivers do not all act the same; for instance, see the pCO2 and O2 dynamics in the Cocheco River compared to the Oyster River •Phytoplankton and zooplankton community structure varies spatially, despite the strong tidal mixing of this system •Storm events, such as the recent floods, strongly affect the carbonate and biological dynamics of this system, and could be important in budgets and models O2 sat (%) rt for this work was provided by the NOAA Coastal Services r through an award to the UNH Center for Coastal Ocean vation and Analysis (COOA), NOAA Award NA16OC2740.
