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Current meters for measurement of low‐speed velocities in ice‐covered lakes
Author(s) -
Glinsky Alexander
Publication year - 1998
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1998.43.7.1661
Subject(s) - current meter , current (fluid) , calibration , drag , metre , wind speed , range (aeronautics) , wind tunnel , geology , remote sensing , meteorology , environmental science , geodesy , marine engineering , acoustics , physics , mechanics , engineering , oceanography , aerospace engineering , quantum mechanics , astronomy
Two current meters for measurement of low‐speed currents in ice‐covered lakes, a “drag‐wire” current meter (DWCM) and an acoustic current meter (ACM), are presented. The recording range is 0.1–20 mm s −1 for the DWCM and 0.2–70 mm s −1 for the ACM. The accuracy, obtained from laboratory calibration, is ±30% of the velocity reading and ± 10° for direction for the DWCM and ±40% of the velocity reading and ± 10° for direction for the ACM. Comparison of the two devices in the field and between simultaneous DWCM recordings and drogue observations, performed in a wind‐protected hole in the ice, showed reasonable agreement.