Temperature, salinity, and nutrients from near surface shallow water samples of Mamala Bay Project MB-9, Ecosystem Response Study, (1993-1994) on Oahu, Hawaii (NODC Accession 9900064)

Metadata Updated: February 8, 2018

Water quality at 10 recreational beaches in Mamala Bay and in the nearshore ocean were monitored over a period of 12 months in 1993-1994 to determine the impact of sewage discharges and non-point source pollution on conditions in the bay. Measurements included temperature, salinity, nutrients and other parameters. The data were collected under direction of Dr. Edward Laws of the University of Hawaii for the Mamala Bay Study, Ecosystem Response Study, MB-9. Samples were collected by wading into the water and filling a 20-liter carboy with water from just below the surface in water about one meter deep.

 Samples were collected at the ten beaches on a monthly

basis from August 1993 to July 1994. The samples were collected from just below the surface in acid-cleaned 20-liter plastic carboys at a distance from the shoreline where the water column was one meter deep. The temperature of the water was recorded immediately using a thermometer calibrated to 0.1 oC and the conductivity measured with an Extech Oyster conductivity meter. Upon return to the laboratory, aliquots of the water were filtered through GF/F filters for further analysis. The filtrates were used to determine inorganic nutrient concentrations as previously described. Samples for PC and PN analysis were collected on precombusted GF/F filters and processed as described above. Samples for chl a and carotenoid pigment analysis were collected on GF/F filters and placed in liquid nitrogen prior to extraction. The pigments were extracted by placing the filters in approximately 5 ml of acetone for 12 h. The filters were then ground using a Wheaton tissue grinder and the filter residue removed by centrifugation as described in Strickland and Parsons (1972). The extracted pigment concentrations were then determined on a Varian 5000 high performance liquid chromatograph (HPLC) as described by Laws et al. (1990).

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Dates

Metadata Date February 27, 2017
Metadata Created Date September 27, 2015
Metadata Updated Date February 8, 2018
Reference Date(s) December 19, 2010 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date February 27, 2017
Metadata Created Date September 27, 2015
Metadata Updated Date February 8, 2018
Reference Date(s) December 19, 2010 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints Cite as: Laws, E. A. and University of Hawai'i at M\u00c4\u0081noa (2010). Temperature, salinity, and nutrients from near surface shallow water samples of Mamala Bay Project MB-9, Ecosystem Response Study, (1993-1994) on Oahu, Hawaii (NODC Accession 9900064). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date], NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long -157.8
Bbox North Lat 21.3
Bbox South Lat 21.2
Bbox West Long -158.1
Coupled Resource
Frequency Of Update asNeeded
Guid gov.noaa.nodc:9900064
Harvest Object Id ef444b94-5f1a-4047-8141-bdfbecf74938
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence accessLevel: Public
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1993-08-31
Temporal Extent End 1994-07-26

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