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


HOT-99: Chief Scientist Report


Chief Scientist: L. TUPAS


Loading: November 4 and 7, 1998		Chief Scientist: Dr. Louie Tupas
Departed: November 9, 1998 at 0900      Master: Captain John Stahl
Returned: November 12, 1998 at 1800     Deck Operations: Mr. Dave Gravatt
Vessel: R/V Moana Wave   Electronics    Technician: Mr. Steve Poulos

1. SCIENCE PERSONNEL

 Luis Tupas - UH, JGOFS
 Dale Hebel  UH JGOFS
 Karin Bjorkman - UH, JGOFS
 Lance Fujieki - UH, JGOFS
 Scott Nunnery - UH, JGOFS
 Rebecca Scheinberg UH, student
 Dan Sadler - UH, JGOFS
 Craig Nosse - UH, WOCE
 Don Wright - UH, WOCE
 Fernando Santiago Mandujano - UH, WOCE
 Mark Valenciano  UH, WOCE
 Claudia Benitez-Nelson - UH, Post-doc
 Markus Karner  UH, Post-doc

2. GENERAL SUMMARY

 All objectives of the JGOFS and WOCE programs were accomplished. All
planned stations were occupied. Weather and sea conditions were moderate
to rough but within limits of safety for deck operations. All core
samples were taken and the 36 hour CTD burst sampling period was not
interrupted. All samples for ancillary projects were taken. Floating
sediment trap array and primary production array deployed and recovered
successfully. No samples were lost during the in-situ incubations. ADCP
measurements were made throughout the cruise. Return to Honolulu was
made early because the HALE ALOHA mooring was retrieved (no HALE ALOHA
Station).

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

November 7, 1998; Loading Day

 The ship was used for the HALE ALOHA and sediment trap mooring recovery
cruise prior to HOT-99. The ships main deck was reconfigured for HOT
equipment. All deck and lab equipment had already been set-up during the
mooring cruise loading day. All electrical and electronic connections
were made for the CTD. All lab equipment were stowed away and secured.
All laboratory instruments were tested and appeared functioning. No
problems were encountered.

November 9, 1998

We departed from Snug Harbor at 0900 as scheduled without any problems.
Fire and emergency drills conducted at 0930 followed by a safety
briefing by the first mate and a short science meeting. Arrived at
Station Kahe at 1200 and conducted the weight cast to 1000 m and the
PRR/TSRB casts. A CTD cast to1000 meters was made. All samples were
taken and we departed for Station ALOHA at 1500.

November 10, 1998

We arrived at Station ALOHA circle at 0000 and commenced work with a net
tow and then deployed the floating sediment traps. The deep cast started
at 0300. The 3-hour burst sampling started at 0800. CTD casts at 3-hour
intervals were conducted without interruption.

November 11, 1998

Work continues according to schedule without any problems. Go-Flo cast
at 0300. Primary production experiment made from CTD and Go-Flo cast
water. Primary production experiment was deployed without incident. EOC
spikes were performed. At noon we did optical measurements as scheduled
at Station ALOHA. Net tows so far successful and grazing experiments are
underway. Primary  production experiment retrieved at 1900 and all
samples processed shortly after. CTD casts continue at 3 hour intervals.
Second WCOE deep cast started at 2300.

November 12, 1998

We have been receiving ARGOS positions for the sediment trap array. They
have not moved very far. Work has been proceeding as scheduled without
any problems. Second WOCE deep cast completed at 0200. After last cast,
ship proceeded sediment traps. Traps retrieved at 0630 and ship
proceeded to Honolulu at 0700. Arrived at Snug Harbor at 1800.

November 13, 1998

Unloading commenced at 0800 and completed at 1200. Preparation were made
for mooring deployment cruise.

SAMPLES TAKEN FOR OTHER INVESTIGATORS

1. DIC water samples for C.D. Keeling, SIO-UCSD
2. DIC water samples for P. Quay, UW
3. Seawater for E. Laws, UH
4. Phosphorus experiments by Karin Bjorkman, UH
5. Molecular probe experiments by Markus Karner, UH
6. Aerosol and ozone measurements for J. Porter, UH