The Canadian Department of Fisheries and Oceans has constructed a network of tidal gauging stations in the Arctic. These gauging stations will be used to monitor changes in sea level height to determine the effects of climate change.

The gauging stations (red dots marked on the map, except Churchill) utilize a Paroscientific Model 230G gauge pressure transducer connected to a gas-purge bubbler system.

The transducer output  is converted to an equivalent height of water by applying factors for local gravity and water density, then logged in a digital data logger at 3 minute intervals.

There are presently 3 of these tidal gauging stations in operation, located at Tuktoyaktuk, Holman and Alert. A fourth station will be constructed in 2004 at Qikiqtarjuaq on Baffin Island. The Alert station is the most northerly station in the world that continuously records data.

Paroscientific instruments were chosen for this application because they  provide the most accurate, reliable, and repeatable pressure measurements over a wide temperature range under demanding environmental conditions.

Author: Technel Engineering
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