Dataset Available

Cross-channel differences in bottom pressure and acoustic round-trip travel time from PIES instruments in Yucatan Channel, Mexico, from 2018-07-30 to 2020-07-30

Authors: Send, Uwe, Julio Candela, Matthias Lankhorst, Gaston Manta, Jeff Sevadjian, and Julio Sheinbaum
Published On: Jan 04 2024 21:54 UTC
DOI: https://doi.org/10.7266/VRVK55SR
UDI: U2.x860.000:0001
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Project Information

Funded By:
National Academies of Sciences Gulf Research Program
Ensenada Center for Scientific Research and Higher Education

Funding Cycle:
Understanding Gulf Ocean Systems Grants 2

Research Group:
Technology and Methods for Yucatan Channel Monitoring

Point of Contact

Matthias Lankhorst
Scripps Institution of Oceanography / University of California
mlankhorst@ucsd.edu

Data Collection Period
2018-07-30
to
2020-07-30
Theme keywords

ocean currents, seafloor pressure, Pressure-sensing Inverted Echo Sounder (PIES), cross-channel gradient, horizonal difference vertical travel time, horizonal difference seafloor pressure

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Abstract:

From 2018-07-30 to 2020-07-30, two PIES instruments (pressure-sensing inverted echo sounders) were deployed in Yucatan Channel, Mexico. PIES instruments make observations of seafloor pressure and travel time of an acoustic signal between the seafloor and the sea surface. These data are reported here, in a processed version that shows the differences between the eastern and the western sites with trends and tides removed. The PIES were deployed from the R/V Justo Sierra (cruise ID CANEK-42) at degrees decimal minutes: 21 deg 36.55’N, 86 deg 13.91’ W (decimal degrees: 21.609167N, -86.231833W) - mooring site YUC5 and at degrees decimal minutes: 21deg 46.88’N, 85deg 10.43’ W (decimal degrees 21.781333N, -85.173833W) - mooring site YUC9 in 1190 m and 1880 m water depth, respectively. Related data are available in datasets U2.x860.000:0002 (gridded density and geopotential height differences; https://doi.org/10.7266/YQWCV66H), U2.x860.000:0003 (gridded vertical sections of zonal and meridional velocity components; https://doi.org/10.7266/AK8HHNYX), and U2.x860.000:0004 (ocean volume transport; https://doi.org/10.7266/GBCNGJQF).

Suggested Citation:

Send, Uwe, Julio Candela, Matthias Lankhorst, Gaston Manta, Jeff Sevadjian, and Julio Sheinbaum. 2024. Cross-channel differences in bottom pressure and acoustic round-trip travel time from PIES instruments in Yucatan Channel, Mexico, from 2018-07-30 to 2020-07-30. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/VRVK55SR

Purpose:

Part of an array that monitors throughflow through the Yucatan Channel, Mexico.

Data Parameters and Units:

horizontal difference in seafloor pressure [dbar]; horizontal difference in vertical acoustic travel time [s]; time [days since 2001-01-01 at 00:00:00Z]

Methods:

Bottom pressure records were quality controlled by identifying outliers and data outside the deployment times; detrended by a combination exponential decay curve and linear trend; de-tided with a loss-pass filter with a 2.2 day cutoff; and interpolated to daily time intervals. The acoustic travel time data were quality controlled with a similar procedure; binned into three-hour intervals and a 25% percentile value calculated on bins with sufficient data; de-tided as were the pressure records; and interpolated to daily time intervals.

Instruments:

Pressure-sensing Inverted Echo Sounder (PIES)

Individual Files: