Data presented here are profiles of primary CTD parameters (pressure, depth, temperature, and salinity) plus auxiliary measurements of dissolved oxygen, beam attenuation, relative fluorescence, and photosynthetic active radiation (PAR) at the BATS site 31° 40' N 64° 10'W for years 1988-2023. Profiles were collected using a standard Sea-Bird SBE-09 plus CTD during the monthly core BATS cruises and near biweekly BATS bloom cruises during the months of February through April depending on ship avail...
Show moreCTD profiles at the BATS site have been collected since the inception of the program in October 1988 and although there have been some changes during the past thirty years as a result of new instrumentation or methodologies, the general sampling procedures have been consistent with those detailed in the BATS method manual version #4 (Knap et al., 1996).
In summary, the CTD is operated as per SeaBird's suggested methods with data collection at the full scan rate of 24 Hz. The CTD is powered up and allowed to stabilize at 12 m prior to profiling and once stable (typically 4 minutes) the CTD is brought back to the surface from which point the profile begins with typical descent rates of 0.7-1.0 m/s, depending on weather conditions. Water samples are collected on the upcast and prior to triggering bottles the CTD is kept at the desired depth for a minimum of 60 seconds to ensure that entrainment from the following wake has subsided. Once the water sample is taken the CTD immediately continues with the upcast at an ascent rate of 0.7-1.0 m/s.
Johnson, R. J., Bates, N., Lethaby, P. J., Smith, D. (2024) Two decibar averaged CTD profiles collected at the Bermuda Atlantic Time-series Study (BATS) site from October 1988 through December 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 8) Version Date 2024-10-22 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3918 [access date]
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