Hawaii Ocean Time-series (HOT)
in the School of Ocean and Earth Science and Technology at the University of Hawai'i at Manoa
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Spec. Topics
DSR II: v43, 2-3, 1996
HOT-75 Commemorative
Science Symposium
DSR II: v48, 8-9, 2001
Related Proj.
WHOTS
ACO
SCOPE-ALOHA
SeaGliders
ALOHA Wirewalkers
HOT LAVA
HALE-ALOHA
ALOHA-CLIMAX
Parameters Measured
Parameter
Depth Range (m)
Analytical Procedure
1. Continuous Measurments
Depth
(Pressure)
0-4750
Pressure transducer on Sea-Bird CTD package
Temperature
0-4750
Thermistor on Sea-Bird CTD package
Conductivity
(Salinity)
0-4750
Conductivity sensor on Sea-Bird CTD package, with discrete salinity samples calibration
Dissolved Oxygen
0-4750
Sea-Bird sensor on Sea-Bird CTD package with discrete oxygen samples calibration
Fluorescence
(Chloropigment)
0-4750
Sea-Point chlorophyll fluorometer on Sea-Bird CTD package with discrete chlorophyll samples calibration
Nitrate
0-1000
Satlantic's In Situ Ultraviolet Spectrometer (ISUS) with discrete nitrate samples calibration
2. Optical Measurments
Incident Irradiance
(PAR)
Surface
LI-COR LI-1000 and Biospherical 2 π Collector
Surface Downwelling Irradiance
Surface
Biospherical Surface Reference Sensor PRR-610 (discontinued)
Underwater Irradiance (PAR)
0-200
Biospherical Profiling Natural Fluorometer 4 π Collector (discontinued)
Upwelling Radiance and Downwelling Irradiance
0-200
Biospherical Profiling Reflectance Radiometer PRR-600 (discontinued)
Upwelling Radiance and Downwelling Irradiance
0-200
Satlantic Profiler II with HyperOCR Hyperspectral Radiometers & WET Labs ECO-BB2F Triplet
Upwelling Radiance and Downwelling Irradiance
0-3
Satlantic Tethered Spectral Radiometer Buoy (discontinued)
Upwelling Radiance and Downwelling Irradiance
0-3
Satlantic OCR 500 Multispectral Radiometers (discontinued)
Absorption and Beam Attenuation
0-200
WET Labs AC-9 & AC-S connected to Sea-Bird Sea-Cat package (discontinued)
Fast Repetition Rate Fluorometry
0-200
Chelsea FAST
tracka
Dynamic Photosynthetic Fluorometer (discontinued)
Particle Size Analysis
0-200
Sequoia Laser In-Situ Scattering & Transmissometry (LISST-100X)
3. Water Column Chemical Measurements
Salinity
0-4750
Guildline AutoSal using Wormley seawater standard
Oxygen
0-4750
Winkler Titration
Dissolved Inorganic Carbon
0-4750
Coulometry
Total Alkalinity
0-4750
Automated Gran Titration
pH
0-4750
Spectrophotometric
Nitrate Plus Nitrite
0-4750
Autoanalyzer
Soluable Reactive Phosphorus
(SRP)
0-4750
Autoanalyzer
Silicate
0-4750
Autoanalyzer
Low Level [Nitrate + Nitrite]
0-200
Chemiluminescence
Low-Level SRP
0-200
Magnesium-induced Coprecipitation
Dissolved Organic Carbon
0-4750
High Temperature Catalytic Oxidation
Dissolved Organic Nitrogen
0-1000
U.V. oxidation of total nitrogen
Dissolved Organic Phosphorus
0-1000
U.V. oxidation of total phosphorus
Particulate Carbon
0-350
High Temperature Combustion
Particulate Nitrogen
0-350
High Temperature Combustion
Particulate Phosphorus
0-350
High Temperature Combustion
Particulate Biogenic Silica
0-175
Base Hydrolysis with Amonium Molybdate Colorimetry
4. Biomass Measurments
Chlorophyll
a
& Pheopigments
0-175
Fluorometric Analysis using 10-AU
Chlorophyll
a
,
b
&
c
0-175
Fluorometric Analysis using TD-700 (discontinued)
Pigments
0-175
High Performance Liquid Chromatography (HPLC)
Phycoerythrin
0-175
Fluorometric Analysis using TD-700 (discontinued)
Adenosine 5'-Triphosphate
0-350
Firefly Bioluminescence
Bacteria and Cyanobacteria
0-175
Flow Cytometry
Nanoplankton and Microplankton
0-175
Epi-fluorescence Microscopy (discontinued)
Mesozooplankton
0-175
Net tows, elemental analysis
5. Carbon Assimilation and Particle Flux
Primary Production
5-125
14
C-bicarbonate
in situ
Incubations
Carbon, Nitrogen, Phosphorus & Silica Flux
150
Free-Floating Particle Interceptor Traps
6. Currents
Acoustic Doppler Current Profiler
0-150
Hull Mounted, RDI #VM-150 (discontinued)
Acoustic Doppler Current Profiler
10-1200
Hull Mounted, RDI #OS-38
Acoustic Doppler Current Profiler
10-100
Hull Mounted, RDI #WH-300
Acoustic Doppler Current Profiler
0-4750
Lowered ADCP (discontinued)
7. Instrument Towfish (discontinued)
Pressure (Depth)
45
Sensor on Sea-Bird package
Temperature
45
Thermistor on Sea-Bird package
Conductivity (Salinity)
45
Conductivity sensor on Sea-Bird package
Zooplankton
45
Optical Plankton Counter
Fluorescence
45
WetLabs SeaStar fluorometer on CTD package
8. Bow Intake System
Temperature
3
Sea-Bird remote temperature sensor
Conductivity
(Salinity)
3
Sea-Bird temperature & conductivity sensors inside the thermosalinograph package, with discrete salinity samples calibration
pCO
2
3
Gas equilibration, infrared detection (discontinued)
Fluorescence (Chloropigment)
3
Fluorometric Analysis using 10-AU
9. Moored Instruments
Inverted Echo Sounder Network
(Dynamic height)
4750
Acoustic telemetry, CTD calibration (discontinued)
Sequencing Sediment Traps
(Particle Flux)
2800, 4000
Parflux MK7-21
Physical-Biogeochemical Mooring
0-1000
HALE-ALOHA
(discontinued)
Physical Oceanographic Mooring
0-155
WHOTS
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National Science Foundation
(NSF)