Abstract:

Continuous dissolved oxygen concentration data were collected at the long-term monitoring station C6C, located offshore from Terrebonne Bay, LA, from July 10 to August 10, 2010. YSI 6600 sondes were located near the surface (3 m), mid-water (11 m), and near the bottom (19 m).

Suggested Citation:

Rabalais, Nancy N., Smith, Leslie. 2017. Continuous Oxygen Measurements at station C6C on Louisiana shelf from July-August 2010. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7M32SWZ

Publications:

Rabalais, N. N., Smith, L. M., & Turner, R. E. (2018). The Deepwater Horizon oil spill and Gulf of Mexico shelf hypoxia. Continental Shelf Research, 152, 98–107. doi:10.1016/j.csr.2017.11.007

Purpose:

The continuous dissolved oxygen data are collected as part of a long-term coastal Louisiana dataset, with the goal of understanding physical and biological processes that contribute to the causes of hypoxia and use the data to support environmental models for use by resource managers.

Data Parameters and Units:

Date/Time: M/DD/YY hh:mm Surface DO (mg/L): Dissolved oxygen measured at the surface meter Mid DO (mg/L): Dissolved oxygen measured at the mid-water meter Bott DO (mg/L): Dissolved oxygen measured at the bottom meter

Methods:

YSI 6600 sondes were deployed at station C6C (July 10 to August 10, 2010) to record dissolved oxygen concentrations at 3-, 11-, and 19-m. The sondes are pre-calibrated according to factory instructions. The probes are wrapped with copper tape to reduce biofouling. There are copper sonde guards for the 3-m and 11-m sondes; the 19-m sonde did not have a copper sonde, but biofouling is minimal in the area of hypoxia. The sondes are post-calibrated according to factory instructions. Separate YSI 6820 data collected at the times of servicing of the sondes are used to cross-check the dissolved oxygen concentrations of each meter. Data are corrected as necessary, or deleted as identified as inadequate for reporting. Examples of bad data are values that decline along with battery power, data that shift dramatically during a deployment, and data that do not correspond with YSI 6820 data. The YSI 6820 data are located at doi: 10.7266/N7W66HP0.

Instruments:

YSI 6600 sondes

Error Analysis:

LUMCON Continuous Monitoring Stations are maintained in accordance with manufacturer calibration standards. Sensors are swapped every one and a half to two months pending weather and ship availability.

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