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Oceanorraphical Properties of Seawater
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* Masaru SHIOZAKI ~
L, Observations
@®+- Seawater samples for chemical analysis and water
temperature measurements were collected by Nansen _
“bottles equipped with reversable thermometers from
tthe :150 and 300 m levels.
Surface water was sampled
shy; polyethylene bucket and the surface temperature
was measured with a standard type thermometer. Chemical
lysis was performed for dissolved oxygen, chlorine
‘content and hydrogen ion concentration.
Yet
2. Measurements
a. Dissolved oxygen - The amount found in the
sea water was determined by the Winkler method.
oan b. Chlorinity - Determined by the Fajans tritation
~~method using Uranin as the indicator and silver nitrate
Splutions as the titrant.
Lor oe,
mad
;
c. Hydrogen ion concentration - Determined by the
visual colorimetric method.
me
FR eResults
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Temperature measurements and chemical analysis of
_the seawater samples are shown in Table 1. Horizontal
“distribution of seawater temperature at the surface,
750%m level, 100 m level and 200 m level are shown in
» Figs 1 to 4. Horizontal distribution of chlorinity and
‘dissolved oxygen at the surface and 150 m levels «re shown
‘in Figs 5 to 8.
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Sectional distribution of seawater
“temperature, chlorinity and dissolved oxygen are
. Shown in Figs 9 to 11.
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Hydrographic Division, Meritime Safety Board Agency
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