HOT-105: Chief Scientist Report

Chief Scientist: L. TUPAS

Loading: May 7, 1999            	Chief Scientist: Dr. Louie Tupas
Departed: May 8, 1999 at 0900         	Master: Captain Robert Hayes
Returned: May 13, 1999 at 0800       	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
 Terry Houlihan  UH JGOFS
 Dan Sadler - UH, JGOFS
 Craig Nosse - UH, WOCE
 Don Wright - UH, WOCE
 Fernando Santiago Mandujano - UH, WOCE
 Mark Valenciano  UH, WOCE
 John DeVilbiss  HPU undergraduate
 Albert Calbet - UH, Scientist
 Claudia Benitez-Nelson  UH, Scientist
 Rebecca Scheinberg  UH Graduate Student
 Ed Boyle  MIT Scientist
 Rick Kayser  MIT Scientist

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. Samples for trace metals
were taken by MIT researchers using their sampling device attached to
the CTD wire. The HALE ALOHA mooring was successfully recovered.

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

 This was the last HOT core cruise on the R/V Moana Wave. This provided
us the longest and best support for our work. The officers and crew have
always been very 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 and all past cruises
was excellent. STAG personnel were available at any time to assist in
our work and made things much easier for us. We are deeply saddened by
the retirement of this still excellent vessel.

4. DAILY REPORT OF ACTIVITIES

May 7, 1999; Loading Day

 We did a full on-load for this cruise. The ships main deck was
configured for HOT equipment including the new mooring winch. All deck
and lab equipment were loaded and secured within the ships labs.. All
electrical and electronic connections were made for the CTD. All other
equipment and containers were stowed away and secured. All laboratory
instruments were tested and appeared functioning. No problems were
encountered. All o-rings on sampling bottles now made of silicon.

May 8, 1999

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. Aerosol and ozone
measurements were made. All samples were taken and we departed for
Station ALOHA at 1600. Seas and weather rough.

May 9, 1999

After a really rough transit we arrived at Station ALOHA circle shortly
after 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 0900. CTD casts at 3-hour intervals were conducted
without interruption. Seas still rough. Conducted optical casts and
atmospheric measurements near during SeaWIFs overpass. Net tows
ocnducted at noon.

May 10, 1999

Work continues according to schedule without any problems. Go-Flo cast
at 0200 with some difficulty. Primary production experiment made from
Go-Flo cast water. Comparison experiment was made from 5 and 25 meter
water from CTD cast. Primary production experiment was deployed without
incident at 0500. At noon we did optical and atmospheric measurements as
scheduled at Station ALOHA. Net tows successful. Primary  production
experiment retrieved at 1900 and all samples processed shortly after.
CTD casts continue at 3 hour intervals. Last cast ended at midnight.

March 11, 1999

We have been receiving ARGOS positions for the sediment trap array. They
have not traveled far, only 14 miles. Work has been proceeding as
scheduled without any problems. Second WOCE deep cast started at 0300
and completed at 0700. After last cast, the CTD package was disconnected
and the MIT sampler was attached to the cable. The MITESS cast started
at 0700 and completed at 1100. Ship proceeded to the trap location and
traps retrieved at 1400. Ship then proceeded to HALE ALOHA. Arrived at
HALE ALOHA at 1600. We had a barbecue cookout on the deck for dinner.
Conducted trace metal sampling with MITESS at 1800 and completed at 0100
on May 10.

May 12, 1999

 The CTD cast at HALE ALOHA was conducted at 0500. Communication with
the acoustic releases started at 0730. Mooring released at 0800.
Recovery operations started at 0830. The whole mooring was on-board by
1300. We started the transit to Snug by 1400.

March 13, 1999

We arrived at Snug Harbor at 0800.  Unloading commenced immediately and
completed at 1200.

SAMPLES TAKEN FOR OTHER INVESTIGATORS

1. DIC water samples for Charles Keeling, SIO-UCSD
2. DIC water samples for Paul Quay, UW
3. Seawater for Ed Laws, UH
4. Phosphorus experiments by Karin Bjorkman, UH
5. Aerosol and ozone measurements for J. Porter, UH
6. Seawater for Ted Walsh, UH
7. N2O samples for Brian Popp, UH