Georges Bank Nutrient and Phytoplankton Chlorophyll Data from Univ. of Maine (GLOBEC Program)
Entry ID:
UME_SMS_PHYPL_CHL_NUTR
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Summary
Abstract:
Nutrient and chlorophyll vertical profiles and aerial contour plots are available for the Georges Bank region of the northwest Atlantic Ocean near the Gulf of Maine. Data were collected on the following cruises during 1997-1999: 1997 January 13 - 20 (R/V Albatross) February 11 - 22 (R/V Oceanus) ... March 16 - 29 (R/V Oceanus) April 20 - May 3 (R/V Oceanus) May 19 - 30 (R/V Oceanus) June 18 - 28 (R/V Albatross) 1998 February 7 -17 (R/V Oceanus) March 15 - 26 (R/V Oceanus) April 16 - 26 (R/V Oceanus) May 10 - 20 (R/V Albatross) June 17 - 25 (R/V Albatross) 1999 11-24 January (R/V Albatross) 11-23 February (R/V Oceanus) 10-23 March (R/V Oceanus) 16-28 April (R/V Oceanus) 19-27 May (R/V Albatross) 14-24 June (R/V Albatross). Water samples were collected on all cruises for the analysis of phytoplankton biomass (chlorophyll a and phaeophytin). In addition, dissolved inorganic nutrient concentrations (NO3+NO2, SiO4, PO4 and NH4) were determined for four of the six Broadscale cruises in 1997, five of six in 1998, and all six in 1999. Water collections were made at various depths at all of the regular hydrographic stations (1-40 or Sta 41 after 1997) using Niskin bottles mounted on the rosette sampler. Additional surface water samples were collected at positions between the regular stations (numbered >41; refer to Station Location Map for example). Phytoplankton chlorophyll a and phaeopigments were determined fluorometrically (Parsons et al., 1984). The extracted chlorophyll measurements involved collecting 100ml from all bottle samples taken at depths shallower than 60m, filtering through GF/F filters, and extracting in 90% acetone in a freezer for at least 12 hours. The samples were analyzed at sea using a Turner Model 10 fluorometer. Water samples for DIN were filtered through 0.45 Millipore cellulose acetate membrane filters and then frozen immediately in 20ml acid-washed polyethylene scintillation vials by first placing the vials in a seawater-ice bath for approximately 10 minutes. Samples were analyzed in the lab following the cruise using a Technicon II 4-Channel Auto-Analyzer. In addition to dissolved inorganic nutrients and chlorophyll, in 1999 we also analyzed samples for particulate organic carbon and nitrogen, dissolved organic nitrogen, and particulate and dissolved organic phosphorus. Results from the vertical profiles taken at each station can be viewed as contour plots (using Surfer Software, Golden Colorado) for 1997, 1998 and 1999. Plotted variables include Temperature and Salinity for the hydrographic data, Chlorophyll a for the pigment analyses and Nitrate plus Nitrite, Silicate, Ammonium and Phosphate for the inorganic nutrient analyses. The hydrographic data were contoured only for the surface (2m). The pigment and inorganic nutrient concentrations were contoured for the surface (2m), 20 meter and 60 meter depths.
Related URL
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Description:
Biological Oceanography Laboratory-GLOBEC project page
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 43.0
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S: 40.0
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E: -65.0
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W: -70.0
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Min Depth:
-URFAC
Max Depth:
60 M
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Temporal Coverage
Start Date:
1997-01-13
Stop Date:
1999-06-24
Distribution
Distribution Format:
ASCII
Fees:
None
Personnel
Role:
TECHNICAL CONTACT
Phone:
303 541 3036
Fax:
303 447 2505
Email:
graiken at usgs.gov
Contact Address:
U.S. Geological Survey
3215 Marine Street
City:
Boulder
Province or State:
CO
Postal Code:
80303
Country:
USA
Role:
DIF AUTHOR
Email:
alicia.m.aleman at nasa.gov
Contact Address:
Goddard Space Flight Center
Code 610.2
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Publications/References
Aiken, G. R., 1992, Chloride Interference in the Analysis of Dissolved Organic Carbon by the wet oxidation method the Wet Oxidation Method, Environmental Sciences and Technology, v.26, p.2435-2439, Dorcrecht, Netherlands, Kluwer Academic Press. Cotlove, E., Trantham, H. V., Bowman, R. L., 1958, An Instrument and Method for Automatic, Rapid, Accurate and Sensitive Titration of ... Chloride in Biologic Samples Titration of Chloride in Biologic Samples, Journal of Laboratory and Clinical Medicine, v.51, p.461-468, New York, NY, Elsevier Inc. Garbarino, J. R., Taylor, H.E.,1979, An inductive-coupled plasma atomic-emission spectrometric method for routine water quality testing Routine Water Quality Testing, Applied Spectroscopy, v.33, no.3, p.220-226, Frederick, MD, Society for Applied Spectroscopy. Garbarino, J. R., Taylor, H. E., 1980, A Babington-type nebulizer for use in the analysis of natural water samples by inductively coupled plasma spectrometry, Applied Spectroscopy, v.34, no.5, p.584-590, Frederick, MD, Society for Applied Spectroscopy. Reddy, N. M., Schuster, P. F. , Harte, J. J., 1989, Summary of data from onsite and laboratory analyses of precipitation runoff from carbonate-stone surfaces, National Acid Precipitation Assessment Program, June 1984 to November 1987, USGS Open-File Report, OFR 89-246, Reston, VA, U.S. Geological Survey, National Acid Precipitation Assessment Program, June 1984 to November 1987. http://pubs.er.usgs.gov/usgspubs/ofr/ofr89246 Schroder, L. J., Fishman, M. J., Friedman, L. C., Darlington, G. W., 980, The use of standard reference water samples by the U.S. Geological Survey Survey, USGS Open-File Report, OFR 80-738, Reston, VA, U. S. Geological Survey. http://pubs.er.usgs.gov/usgspubs/ofr/ofr80738 Skougstad, M. W., Fishman, M. J., Friedman, L. C., Erdman, D. E., Duncan, S. S., 1979, Methods for the determination of inorganic substances in water and fluvial sediments, USGS Open-File Report, OFR 85-495, Book 5, Chapter A1, Reston VA, U. S. Geological Survey, This publication is no longer current and has been superseded by a more recent publication: USGS Report: TWRI -05-A1. Taylor, H. E., Schiller, A. M., Garbarino, J. R., Brinton, T. I., 1995, Intercomparison Experiments on Dissolved Trace-Metal Data from the Mississippi River and some of its Tributaries, 1989-1990, USGS Open-File Report, OFR 93-628, Reston VA, U.S. Geological Survey. http://pubs.er.usgs.gov/usgspubs/ofr/ofr93628 Wood, W. W., 1976, Guidelines for Collection and Field Analysis of Groundwater Samples for Selected Unstable Constituents, Techniques of Water Resources Investigations of the U.S. Geological Survey, Book 1, Chapter D2, Reston VA, U. S. Geological Survey. http://pubs.usgs.gov/twri/twri1-d2/
Creation and Review Dates
DIF Creation Date:
2006-11-06
Last DIF Revision Date:
2009-06-02
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