Arctic Study

Funding agency: NPRB, NOAA

The objective of the study was to determine the transport of water through Elson Lagoon Estuary under various summer and fall weather conditions and tie the physical conditions with fishery data collected by other groups on the same project. Several surveys have been conducted in the arctic coastal estuarine water since 2013. The work was done in tidal inlets of the Elson Lagoon, Barrow Alaska.

2013        Survey

During the first survey in 2013, the following were used for data collection: pressure sensors, multi-beam ADCP (for velocity profile in the entrance of the North Salt Lagoon), RDI 1200 KHz ADCP for bottom mounted observations, wind data logger made in-house with solar panel integrated with a microcontroller (assembled and programmed by the PI), CTD profilers, and a 6-ft foam-fiberglass automated boat designed and manufactured ourselves to measure flow velocity profiles.

 

2014 Survey

During the second survey in 2014, the following were used for data collection: pressure sensors, multi-beam ADCP (for velocity profile in the entrance of the North Salt Lagoon as well as at the Plover Inlet), RDI 1200 KHz ADCP for bottom mounted observations (deployed by 1273 on July 29 Aug. 3, 2014, sampling at 1 hour intervals; vertical bin size=1 m, with the first bin at 1.53 m; redeployed on August 4 August 19, 2014, recovered after a storm), a CTD profiler, and the 6-ft foam-fiberglass automated boat designed and manufactured ourselves to measure flow velocity profiles.

 

 

 

2015 Survey

During the third survey in 2015, the following were used for data collection: pressure sensors, two RDI 1200 KHz ADCPs for bottom mounted observations at 1-2 min intervals, a SBE 37sm CTD, a tide-wave sensor, a hand CTD profiler, and a hand held weather station. From July 23 to August 4, there were two deployments. A third deployment done between August 6 and Sept. 9. The first deployment involved one ADCP at the Plover Point and a second ADCP at an east inlet two islands down the Plover Point. Both were sampling at 2.4 second intervals with 50 pings within 2 minutes for the ensemble mean. Both ADCPs were RDI 1200 KHz Workhorse Sentinel mounted on an aluminum cross with 5 pound of weight on each of the four legs. The first cross for the first ADCP was larger and heavier and also with a SBE 37 SM CTD and an RBR Tide-wave sensor mounted.

 

 

 

 

Figure: North Velocity from ADCP1 in the channel.

 

Figure: North Velocity from ADCP2 in the east inlet.

 

 

 

 

Figures from the previous two surveys in 2013 and 2014: