salp_chloro

Data Object salp_chloro

contact PIs:

name	title
Dr Larry Madin	Principal Investigator
Dr Patricia Kremer	Co-Principal Investigator

Dataset description

Chlorophyll data associated with salp swarm collections in the Slope Waters off northeastern USA

Associated datasets: salp_swarms

Acquisition description

Seawater was collected with Niskin bottles at several depths and filtered through both GFF filters and 2 µm pore glass fibre filters for analysis of Chlorophyll a and total phaeopigment. Immediately after water samples were filtered, filter pads were transferred into 6 ml of 90% acetone and the pigment was extracted in a dark refrigerator for 24 hours. Filter pads were removed and the test tubes centrifuged just prior to reading the fluorescence. Following the initial fluorescence reading, samples were acidified with ~0.2ml of HCl and reread. The fluorometer was calibrated using a spectrophotometer during each cruise using standard Chl-a derived from spinach. Chlorophyll-a and phaeopigments were calculated from standard equations (Strickland and Parsons 1972).

Processing description

Field Names List

Parameter	Description	Units
cruise_id	cruise designation
year	year, reported as YYYY
haul_id	haul identification number
date_local	local month, day and year
time_local	time of day, local time, using 2400 clock format	HHmm
month_local	month of year, local time
yrday_local	local day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon)
lat	latitude, in decimal degrees, North is positive, negative denotes South	decimal degrees
lon	longitude, in decimal degrees, East is positive, negative denotes West	decimal degrees
day_local	day, local time
comments
sample	sample identification or number
filter	size or type of filter: gff=glass fiber filter	microns
chl_a	total chlorophyll-a pigment	microgram/liter
phaeo	total phaeopigment	microgram/liter
pig_tot	total pigments	microgram/liter
chl_per_tot	ratio of chlorophyll to total pigments

Platforms List

R/V Oceanus OC370

R/V Oceanus OC379

R/V Oceanus OC381

Instruments List

Niskin Bottle:

This document is created from the content of the BCO-DMO metadata database. 2010-09-02 21:44:23

info app: /home/bco/dbase-v2 v.100108 CLC
Data URL: http://data.bco-dmo.org/jg/serv/BCO/Unaffiliated/SalpSwarmDyn/salp_chloro.