Hawaii Ocean Time-series (HOT)
in the School of Ocean and Earth Science and Technology at the University of Hawai'i at Manoa


HOT-77: Chief Scientist Report


Chief Scientist: L. Tupas


Loading: October, 1996                  Chief Scientist: Dr. Louie Tupas
Departed: October 28, 1996 at 0930      Master: Captain John Stahl
Returned: Nov.1, 1996 at 0630           Deck Operations: Mr. Dave Graavat
Vessel: R/V Moana Wave                  Electronics Tech: Ms. Sharon Stahl

1.      SCIENCE PERSONNEL

        Luis Tupas - UH, JGOFS
        Lance Fujieki - UH, JGOFS
        Terrence Houlihan - UH, JGOFS
        Dan Sadler - UH, JGOFS
        Jefrey Snyder - UH, WOCE
        Craig Nosse - UH, WOCE
        Molly Lucas - UH, WOCE
        Fernando Santiago-Mandujano - UH, WOCE
        Patrick Driscoll - UH, Carbon Project
        Stephanie Christensen - UH, Zooplankton/Pigment Project
        Mai Lopez - SIO, OPC
        Stuart Donachie - UH, Postdoc
        John Dunne- UW, Graduate Student


2.      GENERAL SUMMARY

All objectives of the JGOFS and WOCE programs were accomplished.  All
planned stations were occupied. The inverted echo sounder was
successfully retrieved and a new one was moored. All core samples were
taken and the 36 hour CTD burst sampling period was not interrupted. A
second deep cast was made a Station ALOHA. All net tows were
accomplished.  All samples for ancillary projects were taken. Floating
sediment trap array and primary production array deployed and recovered
successfully. One light sample and three dark samples were lost during
the in-situ incubations.  ADCP measurements were made throughout the
cruise. The pCO2 system worked using the ships uncontaminated seawater
intake system. The optical plankton counter was towed around Station
ALOHA with the submersible pump continuously functioning. Water samples
from the pump were taken for salinity, fluorometric chlorophyll a,
low-level nitrogen and phosphorus, dissolved organic carbon and
dissolved oxygen.


3.      R/V MOANA WAVE, OFFICERS AND CREW, TECHNICAL SUPPORT

The R/V Moana Wave continues to maintain the excellent ship support for
our work. The officers and crew were most helpful and accommodating.
They showed enthusiasm and concern for our work and were very flexible
in receiving changes in our operational schedule. Technical support
during this cruise was excellent. STAG personnel were available at any
time to assist in our work and made things much easier for us.


4.      DAILY REPORT OF ACTIVITIES

October 25, 1996; Loading Day
 
All deck and lab equipment were moved from either SNUG Harbor labs or
UH on this day. All electrical and electronic connections were made for
the CTD and the OPC/CWS. All lab equipment were stowed away and
secured.  All laboratory instruments and computers were tested and
appeared functioning. No problems were encountered.

October 28, 1996

All hands arrived on ship by 0800. Ship was scheduled to depart at 0900
but departed at 0930 because o the late arrival of a chemical needed by
one of the scientists. Fire and emergency drills conducted at 1000
followed by a safety briefing by the chief mate and a short science
meeting. Arrived at Station Kahe at 1200. Conducted weight cast
followed by a light cast using the Profiling Reflectance Refractometer.
A 1000 m CTD cast completed the operations. Started transit to Station
ALOHA at 1500 following a depth contour of about 500 meters for ADCP
bottom tracking.  Uncontaminated seawater system was run and the pCO2
system was connected and operated. Arrived at Station ALOHA at 2400.

October 29, 1996

Sediment trap operations commenced at 0045 and accomplished at 0130. A
zooplankton net tow was conducted at 0145. Ship transited around center
of station and commenced IES ranging. Release signal given at 0400 and
surfaced at 0600. IES picked up at 0615. WOCE deep cast at 0800 and
completed at 1200. CTD burst sampling commenced at 1400 and maintained
at 3 hour intervals. Noon zooplankton tows successful. Noon PRR cast
was successful. One night tow was accomplished.

October 30, 1996

CTD casts continued at 3 hour intervals. Go-Flo cast conducted at 0130.
Primary production array deployment commenced at 0430. CTD casts
continued at 3 hour intervals. Zooplankton tows conducted at noon. PRR
cast at 1330. Retrieval of primary production array commenced at 1830.
Some samples were lost. CTD casts continued at 3 hour intervals. One
night tow was accomplished. Last 1000 meter cast conducted at 2300.

October 31, 1996

Transit outside the circle to pump holding tanks and dump trash.
Return to center to deploy new IES at 0300. Second deep cast started at
0400 and finished at 0800. Transit to retrieve sediment traps. Recovery
operations commenced at 0900, finished at 1000. Transit to northeast
corner to commence OPC tow. Equipment problems delayed OPC operations
until 1330.  Submersible pump was functioning and samples were taken.
OPC retrieved at 2030. Transit to Snug Harbor at 0900.

November 1, 1996

Arrived at Snug Harbor at 0700. Proceeded immediately with unloading.
All equipment were taken off. Unloading completed at 1000.

ANCILLARY INVESTIGATIONS

1.  Ectoenzymes - S. Donachie
2.  Water column and trap thorium - J. Dunne

SAMPLES TAKEN FOR OTHER INVESTIGATORS

1. DIC water samples for C.D. Keeling, SIO-UCSD
2. DIC water samples for P. Quay, UW
3. Surface seawater for E. Laws, UH
4. Surface seawater for C. Measures, UH
5. Surface seawater for T. Walsh, UH