Gschwend%20thesis.pdf

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This situation allows the investigation of the influence of different
redox conditions on the volatiles. This chapter reports the observa-
tions made on volatile organic compounds in these three widely
differing oceanic regions.
METHODS
Sampling
In February, 1977, seawater samples were collected in the
Sargasso Sea near Bermuda from the R/V Panulirus II (32°10'N x 64030'W,
about 3000 m depth). The weather was marked by strong winds and
approximately 3-m swells. Water was collected with a single 30-liter
Niskin (Teflon coated spring) and transferred into 2-liter round
bottom flasks on the deck. Upon our return to the dock, water was
transferred to the stripper, spiked with an internal standard, and
stripped. Traps, stored in screw-cap vials, were returned to Woods
Hole for gas chromatography analysis. Hydrographic data were provided
by Dr. B. Morris and Ms. E. Schroeder from the regular Panulirus
station visited within a week of our sample collection.
Seawater samples were also collected from 6 hydrocasts made from
the R/V Oceanus (cruise 22) in the western Equatorial Atlantic in
March, 1977 (Figure 2-1). Sampling occurred between 10:00 and 14:00
local time. PVC Niskins (5- or 30-liter with Teflon coated stainless
steel springs) were used. Sample depths were computed from reversing
thermometer data. Water was transferred in a closed system from the
Niskins through glass to 2-liter round bottom flasks. Samples for
salinity, nutrients, and chlorophyll ~ were also drawn from the same
Niskins.