HOT-94: Chief Scientist Report

Chief Scientist: L. TUPAS

Loading: June 12, 1998   	 Chief Scientist: Dr. Louie Tupas
Departed: June 15, 1998 at 0900  Master: Captain John Stahl
Returned: June 19, 1998 at 0800  Deck Operations: Mr. Dave Gravatt
Vessel: R/V Moana Wave   	 Electronics Technician: Ms. Sharon Stahl

1. SCIENCE PERSONNEL

 Luis Tupas - UH, JGOFS
 Dale Hebel - UH, JGOFS
 Karin Bjorkman - UH, JGOFS
 Terrence Houlihan - UH, JGOFS
 Lance Fujieki - UH, JGOFS
 Pat Driscoll  UH, JGOFS
 Scott Nunnery - UH, JGOFS
 Dan Sadler - UH, JGOFS
 Craig Nosse - UH, WOCE
 Don Wright - UH, WOCE
 Fernando Santiago Mandujano - UH, WOCE
 Markus Karner - UH, Post-Doc
 Ken Smith - SIO, Scientist
 Roberta Baldwin  SIO, Technician
 Robert Glatts  SIO, Technician
 Donna Robinson - HPU, Undergraduate

2. GENERAL SUMMARY

 All objectives of the JGOFS and WOCE programs were accomplished. All
planned stations were occupied. Weather and sea conditions were
initially rough but within the 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. The pCO2 system was
operated using the ships uncontaminated seawater intake system. Ken
Smiths Free Vehicle Grab Respirometer was deployed and retrieved
successfully. The SIO group, however, was unable to retrieve the Rover
they deployed last November. All attempts to contact it were
unsuccessful.

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

June 12, 1998; 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. All lab equipment were stowed away and secured. All laboratory
instruments were tested and appeared functioning. No problems were
encountered.

June 15, 1998

 Scientists arrived on ship by 0830. Ship departed at 0900 after all
scientists and equipment arrived. Fire and emergency drills conducted at
0930 followed by a safety briefing by the first mate and a short science
meeting. Arrived Kahe Station at1200. Conducted weight cast and 1000
meter CTD cast. Did PRR and TSRB cast. Did optical observations with
microtops and marine shadowband radiometer (MSBR). All optical
measurements within SeaWIFs overpass window. Departed Kahe Station at
1600. Transit to ALOHA very rough. Heavy seas and strong winds from the
NE. Ship proceeded directly to IES location (3 miles north of Station
ALOHA center).

June 16, 1998

Arrive at IES site at 0000. Zooplankton net tow conducted at 0030. IES
acoustic ranging commenced at 0100, finished at 0300. Transit to FVGR
deployment site at 0300. Arrive at FVGR deployment site at 0345 and
deploy FVGR. Transit to benthic rover site and arrive at 0400. Ken Smith
was unable to communicate with any of his acoustic releases or benthic
transponders. Release commands were sent at around 0430. We waited for
the Rover to surface and transmit VHF or Argos signals. None were
received and no visual siting made. The Rover was given up for lost at
0900. Proceeded to center of Station ALOHA for WOCE deep cast.

WOCE deep cast started at 1000, on deck by 1400. During WOCE deep cast,
some spikes were observed with the returning data signals. No obvious
damage to wire or connections but a retermination was made anyway. The
36 hour burst sampling started at 1800. All signals are found clean.
WOCE shallow and JGOFS shallow and deep casts accomplished as scheduled.
Zooplankton net tows near noon and midnight. Large net has small tear
after midnight tow. Scott will repair. MSBR measurements from sunrise to
sunset. Microtops measurements, TSRB and PRR during SeaWIFs overpass
window. MSRB monitor was found not functioning at sunset. Will try to
find another monitor on ship.

June 17, 1998

Go-Flo cast started at 0130. Great difficulty because of the
deteriorating conditions of the bottles. Many repeat casts to complete
profile. Go-Flo cast finished at 0300. Primary production experiment
prepared and deployed at 0530. CTD casts continue as scheduled. Net tows
and optical casts conducted as scheduled. Primary production array
retrieved with all samples.

June 18, 1998

 CTD casts completed at 0500. Ship proceeded to benthic operations site
to make a final attempt at communicating or locating the ROVER.
Communication attempts were unsuccessful. FVGR retrieved at 1000. Ship
proceed to location of sediment traps. Sediment trap recovery commenced
at 1400, completed at 1500. Ship transited to HALE ALOHA for CTD work.
All work finished at 2030. Transit to Snug at 2100.

June 19, 1998

 Arrived at Snug Harbor at 0800. Unloading commenced immediately and
completed at 1200.


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