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Sensor maintenance during the ACO-8 cruise (5/28-6/2/2021): the BSP-5 with CTD4 and CAM2 with lights were installed.

ACO Real-time Data Display

Temperature and Salinity at 4728m
26-Nov-2022 16:41:00 UTC
Pressure (dbar)
-
-
4824.419
Temperature (°C)
1.5106
1.5146
Conductivity(S/m)
0.0000
3.1971
3.198
Salinity (g/kg)
-0.002
34.671
34.673
Oxygen (ml/l)
-
2.816
3.423
Current Mean Velocity
Average Doppler currents 34-50 m above the bottom
ADP1
East Velocity(m/s)
0.007
North Velocity(m/s)
-0.088
Absolute Pressure
Pressure (dbar)
Data is new and provisional

4 823.017
PRS1

0.000
PRS2
Fluorometer
26-Nov-2022 16:38:57 UTC
Chlorophyll (μg/l)
-0.009
-0.016
Turbidity (NTU)
-0.076
0.018

Picture of the ACO taken with the ACO videocamera at 4728m.

The data collected with instruments at the ACO are managed with computers at the AT&T Station at Makaha (see Data Management), transmitted via TCP/IP to computers at the University of Hawaii (see Networking), and displayed here in real-time.

 Click here for real-time underwater audio.

 Click here for the ACO YouTube spectrograph recordings.

 Click here for video of ACO 10yr anniversary cruise.

Daily corrected potential temperatures

Daily Along-, Cross-isobath mean currents

Daily Zonal and Meridional mean Currents

Latest Temperature time-series obtained with a Sea-Bird Microcat (SBE-37) SN 2401 located in the Observatory Platform (Small Experiment Module)

[Click on the thumbnail to enlarge the figure]

Recent Temperature Plots




Still Image Slideshow Camera 2

 


Pictures of the abyss are taken every minute with the Axis 214PTZ video camera located at 1.5 m from the bottom, installed in June 2011. The camera is mounted on a tripod and connected to the Observatory.

Still image slideshow(Camera 1 disabled).

Latest Temperatures
Recent Temperature Plots


Latest Temperature time-series obtained with CTD1 (left plot: SBE-37 SN 2401), CTD2 (right plot: SBE-37SMP SN 10149), and CTD3 (bottom plot: SBE-53MP SN 005) located in the Observatory platform, Basic Sensor Package, and Basic Sensor Package 2 respectively.

Note: The CTD3 pump was turned off on 9/21/2016 19:47:13 UTC

[Click on the thumbnail to enlarge the figure]

Latest Salinities
Recent Salinity Plots


Latest Salinity time-series obtained with CTD1 (left plot: SBE-37 SN2401), CTD2 (right plot: SBE-37SMP SN 10149), and CTD3 (bottom plot: SBE-53MP SN 005) located in the Observatory platform, Basic Sensor Package, and Basic Sensor Package 2 respectively.

Note: The CTD3 pump was turned off on 9/21/2016 19:47:13 UTC

[Click on the thumbnail to enlarge the figure]

Latest Oxygen
Recent Oxygen Plots

This instrument is unstable

Latest Oxygen time-series obtained with CTD2 (left plot: SBE-37SMP SN 10149) and CTD4 (right plot: SBE-37SMP SN 23203), located in the Basic Sensor Package and Basic Sensor Packages 4 and 5, respectively.

[Click on the thumbnail to enlarge the figure]

Latest Currents
Recent Currents Plots

Latest current countours obtained with a 250 kHz SonTek Acoustic Doppler Profiler SN C117 located in the Observatory Platform (Small Experiment Module).

Latest mean current vector between 34 and 50 m above the bottom, the current magnitude (in m/s) is indicated by the inner circles. East is to the right, up is to the north

Average current velocity trace in m/s between 34 and 50 m above the bottom for the last 24 hours.

The ADP transducers are 1.83 m above the bottom pointing upwards. The ADP data are processed using software developed by the E. Firing ADCP Laboratory at the University of Hawaii



[Click on the thumbnail to enlarge the figures]

The Paroscientific Nano-BPR pressure data is new and provisional.
Recent Pressure Plots



Pressure time-series obtained with Paroscientific Nano-BPR (left) mounted on BSP2, and Paroscientific RBR (right) mounted on BSP4.
Data for the Paroscientific Nano-BPR is available from 21 Sept 2015 at 40Hz. As of 09 Mar 2016, sampling for the Paroscientific Nano-BPR was changed from 40Hz to 10Hz. As of 31 Aug 2016, sampling for the Paroscientific Nano-BPR was changed back to 40Hz from 10Hz.


Latest pressure residuals time-series from the Nano-BPR Pressure Sensor, after removing the barotropic tides estimated from the TPXO 7.2 model, and the mean pressure at the observatory.





[Click on the thumbnail to enlarge the figure]

Latest Fluorometer
Recent Fluorometer Plots

Chlorophyll and Turbidity time-series obtained with the WetLABS Fluorometer (FLNTURTD SN 2027) mounted in BSP2. The red line is a 1-hour running mean.

[Click on the thumbnail to enlarge the figure]

Real Time Streaming Audio with spectrograph

ACO YouTube live spectrograph stream

Real Time Streaming Audio only

Includes graphic display of frequency spectral decomposition (increasing frequency to the right), with bright colors showing greater energy. Newest spectra appear at top of image and oldest disappear at the bottom.

Streaming audio is lossy compressed for broadcast purposes. Please contact Dr. Bruce Howe (bhowe(at)hawaii(dot)edu) to obtain the raw acoustic lossless data for analysis.

Recorded Audio

Listen to previous sound recordings of whales, earthquakes, etc. obtained with the hydrophone located in the ACO Observatory.

Experimental icListen Streaming Audio


4.5-19 Hz Signal Envelope

0.01-0.09 Hz Signal Envelope

Latest seismogram time-series obtained with an OAS E-2PD hydrophone located on the JBOX frame of the observatory (Hydrophone Experiment Module). The sensor is nominally 1 m above the bottom. These graphs show low-frequency acoustic signals received by sources such as earthquakes, ships, and baleen whales.

Recent Seismogram Plots

Recorded Events

Seismic events previously recorded.

Kilo Nalu Observatory Plots

ADCP-2 and CTD-1 deployed in July 2021 (Data available here)
Recent Currents Plots

Latest current countours obtained with a 1200 kHz TRDI WorkHorse Acoustic Doppler Profiler SN 6934 located in the Kilo Nalu Observatory.

Latest mean current vector between 2 and 15 m above the bottom, the current magnitude (in m/s) is indicated by the inner circles. East is to the right, up is to the north

Average current velocity trace in m/s between 2 and 15 m above the bottom for the last 24 hours.

The ADCP transducers are about 12 m below the surface pointing upwards. The ADCP data are processed using software developed by Geno Pawlak.



[Click on the thumbnail to enlarge the figures]