HOT-87: Chief Scientist Report

Chief Scientist: L. TUPAS

Loading: September 23, 1997		Chief Scientist: Dr. Louie Tupas
Departed: September 24, 1997 at 0900	Master: Captain Thomas Desjardins
Returned: September 26, 1997 at 0800	Resident Technician: Mr. Ron Comer
Vessel: R/V Roger Revelle		Computer Technician: Mr. Jim Charters


1. SCIENCE PERSONNEL
 
Bazua-Duran, Maria Carmen; University of Hawaii; Graduate Student
Bjorkman, Karin; University of Hawaii; Technician
Carrillo, Christopher; University of Hawaii; Graduate Student
Charters, Jim; UCSD/SIO/STS; Computer Technician
Christensen, Stephanie; University of Hawaii; Technician
Clewes, William; WCTS; Observer
Comer, Ron; UCSD/SIO/STS; Resident Technician
DeMoustier, Christian; UCSD/SIO; Scientist
Donachie, Stuart; University of Hawaii; Scientist
Driscoll, Patrick; University of Hawaii; Technician
Fujieki, Lance; University of Hawaii; Technician
Hebel, Dale; University of Hawaii; Scientist
Hochberg, Eric; University of Hawaii; Graduate Student
Houlihan, Terrence; University of Hawaii; Technician
Karl, David; University of Hawaii; Scientist
Karner, Markus; University of Hawaii; Scientist
Kelly, Kevin; University of Hawaii; Graduate Student
Landry, Michael; University of Hawaii; Scientist
Liebeler, Jennifer; University of Hawaii; Graduate Student
Magaard, Ursula; University of Hawaii; Technician 
Measures, Christopher; University of Hawaii; Scientist
Nolla, Hector; University of Hawaii; Technician
Nosse, Craig; University of Hawaii; Technician
Ramm, Hans; University of Hawaii; Technician
Robinson, Donna; Hawaii Pacific University; Undergraduate Student
Sadler, Daniel; University of Hawaii; Technician
Santiago-Mandujano, Fernando; University of Hawaii; Scientist
Scheinberg, Rebecca; University of Hawaii; Graduate Student
Silver, Mark; UCSD/SIO/STS; Computer Technician
Staff, Arthur; SeaBeam; Technician
Stump, Charles; University of Washington; Scientist
Shackelford, Rachel; University of Hawaii; Undergraduate Student
Tupas, Luis; University of Hawaii; Chief Scientist
Vink, Suzanna; University of Hawaii; Scientist
Wright, Don; University of Hawaii; Technician


2. GENERAL SUMMARY

	All objectives for this abbreviated cruise were accomplished. All
planned stations were occupied and all core samples were taken. All
samples for ancillary projects were taken. Floating sediment trap array
was deployed with some difficulty but was recovered successfully. ADCP
measurements were made throughout the cruise. The pCO2 systems of Chris
Winn (Pat Driscoll operating) and Dave Karl (Chris Carrillo operating)
were installed and worked using the ships uncontaminated seawater intake
system. The Revelle's thermosalinograph was also used.

3. R/V Roger Revelle, Officers, Crew and Technical support

	The crew and technical support personnel of the R/V Roger Revelle
contributed greatly to the success of this intense cruise. They showed
concern for our work and were very flexible in receiving changes in our
operational schedule. Technical support during this cruise was excellent.
Support personnel were available at any time to assist in our work and
made things much easier for us. We especially like to thank the chief mate
who freed our array from the ships propellers. 

4. DAILY REPORT OF ACTIVITIES

September 23, 1997; 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 lab vans. All lab equipment were stowed away and secured.
All laboratory instruments were tested and appeared functioning. No major
problems were encountered. 

September 24, 1997
	
	Scientists arrived on ship by 2300 the previous day. Ship departed
at 0045 after all scientists and equipment arrived. Ship arrived at Kahe
Station at 0345 and proceeded with a weight cast to 1000 meters. A 1000
meter CTD cast was made at 0545, however, a problem, with the firing of
the sampling bottles was encountered and the cast was aborted. Package was
brought back on deck and the ship departed Kahe Station. The trace-metal
tow-fish of Chris measures was deployed and towed at the ship steamed
towards to Station ALOHA. The CTD problem was solved before arrival at
ALOHA.  On the way to Station ALOHA, a series of test were conducted for
the ships Sea- Beam. Fire and emergency drills conducted at 1300 followed
by a safety briefing by the first mate and a short science meeting. Ship
arrived on Station at 1800 and the first CTD cast was made at 1900. CTD
casts were made at 3-hour intervals. Net tows were conducted in the
evening. 

September 25, 1997

	Go-Flo cast was made at 0230 and the primary production experiment
was prepared. It was later found that the wrong floats were brought on
this cruise. Replacement floats were used and the sediment trap line was
converted to accommodate the primary production buoy. The array was
deployed at 0500 however the array drifted under the ship, got entangled
with the rudder and propellers and had to be cut loose. The array was
finally adrift at 0700.
	CTD casts continued at 3-hour intervals. Net tows were conducted
at noon. The array was retrieved at 1900. After retrieval the ship
proceeded to HALE ALOHA. CTD cast was conducted at 2100 and completed at
2200. Ship then transited to Snug Harbor. 

September 26, 1997

	Arrived at Snug Harbor at 0700. Proceeded with unloading ,
completed at 1100. 

5. OTHER WORK DONE AT-SEA

1.  Phosphorus experiments by Bjorkman and Thomson.  
2.  Leucine experiments by Karl 
3.  Plankton sampling by student and Landry 
4.  Micropankton Ecology class by Karl and Landry 
5.  Sea-time for Hochberg and Robinson 
6.  Sea-Beam testing by DeMoustier and Staff 
7.  Lab set-up by Landry and Nolla 
8.  Lab set-up by Measures and Vink 
9.  Microbial experiments by Donachie, Karner and Shackelford 
10. Gas sampling by Stump
11. pCO2 comparison by Driscoll and Carrillo

6. 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