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standardization of environmental data and information - International ...

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Discipline Category Parameter Methods/Equipment<br />

Suspended solids Known volume <strong>of</strong> water samples<br />

filtered through preweighed<br />

nucleopore filters <strong>and</strong> dried at 60°<br />

C, allowed to cool <strong>and</strong> reweighed<br />

2. Inputs for <strong>st<strong>and</strong>ardization</strong> <strong>of</strong> protocols for <strong>environmental</strong><br />

studies <strong>of</strong> deep-seabed mining<br />

2.1. Physical oceanographic parameters<br />

By V. Ramesh Babu, V.S.N. Murty, A. Suryanarayana, <strong>of</strong> the National, Institute <strong>of</strong><br />

Oceanography, India<br />

Area Parameters Instruments Levels <strong>of</strong> observation<br />

Meteorology<br />

Surface wave<br />

field<br />

Ocean current<br />

field<br />

Hydrography<br />

Sunshine<br />

Wind speed<br />

Wind direction<br />

Air temperature<br />

Atmospheric pressure<br />

Atmospheric humidity<br />

Wave height <strong>and</strong> period<br />

Sea state<br />

Speed <strong>and</strong> direction<br />

Temperature, salinity<br />

<strong>and</strong> water sampling<br />

Automatic weather<br />

station<br />

Ship-borne wave<br />

recorder<br />

Visual<br />

Recording current<br />

meters (RCMs)<br />

Hydrocast (water<br />

sampling bottles)<br />

10 m above sea surface<br />

Surface<br />

Recommended recording levels<br />

(one meter in each subsurface<br />

layer):<br />

Surface<br />

Mixed layer<br />

Upper thermocline<br />

Lower thermocline<br />

Intermediate depth (~1000 m)<br />

Lower depth (~3000 m)<br />

Abyssal depth (4500-5000 m)<br />

Close to bottom<br />

Discrete or st<strong>and</strong>ard depths (5, 10,<br />

20, 30, 50, 75, 100, 150, 200,<br />

300, 500, 600, 800, 1000,<br />

1200, 1500, 2000, 2500, 3000,<br />

3500, 4000, 4500 <strong>and</strong> 5000 m,<br />

<strong>and</strong> near bottom)<br />

INTERNATIONAL SEABED AUTHORITY 535

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