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Sediment Trap

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tieuminh2510

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Tổng số bài gửi : 350
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Join date : 15/01/2008
Age : 30

Sediment Trap

Bài gửi by tieuminh2510 on Tue Jun 24, 2008 4:01 pm

Many particles in seawater are either neutrally buoyant or settle very slowly-only 10 centimeters to 10 meters each day. Most of the optical signal comes from these small, slowly sinking particles. Other particles, how-ever, settle quickly-as fast as 10 to 100 meters each day-and play a major role in biogeochemical processes in the ocean. To collect the rapidly settling particles we attach sediment traps to a wire held taut by an anchor at the bottom and glass floats at the top. The traps are simple cylinders that collect the settling particles that are carried into the traps by coastal currents (1-40 cm/sec). In the laboratory we determine the size and composition of the material the traps collect.

Sediment Trap [7K]

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