#CONTRIBUTOR:
Dr. David Hashimoto
Department of Oceanography, MSB 519
School of Ocean and Earth Science and Technology
University of Hawaii at Manoa
Honolulu, Hawaii 96822
dhash@soest.hawaii.edu
808-956-8952
808-956-9225 (fax)

#ORIGINATORS:
Dr. Edward A. Laws
Dr. Robert A. Kinzie III
Dr. David Hashimoto
Dr. Paul Bienfang

#ORIGINATOR INSTITUTION:
Department of Oceanography
School of Ocean and Earth Science and Technology
University of Hawaii at Manoa

*Dr. Laws as of 2005 is at Louisiana State University

#TITLE: 
Chlorophyll Data from the Old Outfall Site
in the South Sector of Kaneohe Bay, Oahu,
Hawaii February 2001 to May 2004

#ABSTRACT: 
Kaneohe Bay received increasing amounts of sewage from 
the 1950s through 1977.  Most sewage was diverted from 
the bay in 1977 and early 1978.  Data were collected 
beginning in September 1976 and continued until June 
1979.  The time series was re-established in June 1982 
and continued to December 2005, when it was terminated.  
The sampling  was at 1 m depth in the south sector 
of Kaneohe Bay, Oahu near the old outfall that ceased in 1977.  
Previous NODC Accessions 0000396 (1976-1979) and 0000422
(1982-1/2001) contained monthly averages of chlorophyll a,
based on weekly to bi-weekly samples.  This data set has
the weekly to bi-weekly chlorophyll a, pheo, water 
temperature, secchi depth, and sample site depth.
Additional data were taken from June 2004 - December 2005
and these will be available in a separate data set.

#PURPOSE: 
The purpose was to study the responses of the
ecosystem to the sewage diversion from the
inner bay to an offshore, deep water location
and to continue monitoring the location
to denote changes associated with natural
environmental and anthropogenic forcing on 
the primary productivity.

#FUNDING:
This set is available due to the good will of the ORIGINATORS
and had no explicit funding.

#LOCATION EXTREMES:
SOUTHERNMOST LATITUDE: 21.4116
SOUTHERNMOST LATITUDE HEMISPHERE: N
NORTHERNMOST LATITUDE: 21.4116
NORTHERNMOST LATITUDE HEMISPHERE: N
WESTERNMOST LONGITUDE:  157.775
WESTERNMOST LONGITUDE HEMISPHERE: W 
EASTERNMOST LONGITUDE:  157.775
EASTERNMOST LONGITUDE HEMISPHERE: W  

#LOCATION KEYWORDS: 
Kaneohe Bay, Oahu, Hawaii

#SAMPLING STATIONS: 
Sewage Outfall site in southeast sector of the bay at 1m depth
at 21 24.7N, 157 46.5W

#BEGIN AND END DATES (YYYYMMDD): 
20010207 - 20040526

#SAMPLING PERIODS:
weekly to bi-weekly

#PARAMETERS: 
water temperature (Deg C)
secchi depth (meters)
site depth (meters)
chlorophyll concentrations (mg per cubic meter, or ug/L)
pheo (mg per cubic meter or ug/L)
 *Pheo is an abbreviation for pheopigments which are degradation
  products of chlorophyll that have gone through the acidic digestive tract
  of herbivores.

#METHODOLOGY:
Field Collection-
Water samples were taken using a modified bilge pump
fitted with a garden hose.  Primary production 
measurements on water samples taken before and after
passing through the pump were found not to be 
significantly different.  The water from the pump
was screened through 102-um-mesh nylon gauze in order to
remove the larger zooplankton.  Samples were taken 
at depth of 1m.
Laboratory Methods-
Two liter samples for chlorophyll analysis
were filtered ont GFC filters and analyzed 
following the procedures recommended by Jeffrey
(1974) and Jeffrey and Humphrey (1975).

#INSTRUMENT TYPES:
Bilge pump filter for collection
thermistor
secchi disk
depth chain

#REFERENCES: 
Jeffrey, S. W. 1974. Profiles of Photosynthetic Pigments
  in the Ocean using Thin Layer Chromatography.  Mar.
  Biol. 26: 101-110.
Jeffrey, S.W., and G.F. Humphrey. 1975.  New Spectro-
  photometric Equation for Determining Chlorophylls
  a, b, c1, and c2 in Higher Plants, Algae, and Natural
  Phytoplankton.  Biochem. Physiol. Pflanzen 167:191-194.
Smith, Stephen V., William J. Kimmerer, Edward A. Laws,
  Richard E. Brock, and Ted W. Walsh, 1981.  Kaneohe Bay
  Sewage Diversion Experiment: Perspectives on Ecosystem
  Responses to Nutritional Perturbation.  Pacific Science.
  Volume 35, Number 4, October 1981.  pp. 402.

#SUBMITTING MEDIUM:
paper tables; digitized at the NOAA/NODC Hawaii Liaison office

#FILE FORMATS: 
File name: chl_time_series_Kbay_Feb2001_May2004.sxc
           format: OpenOffice 1.1.2
Redundant ASCII copy: chl_time_series_Kbay_Feb2001_May2004.csv

Columns are self-evident.

#DATASET SIZE:
11 Kbyte

#NUMBER OF DATA UNITS:
1 station

#MISCELLANEOUS:
Existing chlorophyll-a time series from same site at NOAA/NODC:
NODC Accession       Comment
0000396              1976-1979
0000422              1982-1/2001