HOT Process Cruise 1: Chief Scientist Report

Chief Scientist: L. TUPAS

Hawaii Ocean Time-series
HOT Process Cruise 1999; Chief Scientist's Report

Vessel: R/V Ka' Imikai O'Kanaloa, University of Hawaii
Master of the Vessel: Captain Robert Hayes
Chief Scientist: Dr. Louie Tupas 
Deck Technician: Mr. Dave Gravett
Electronics Technician: Mr. Will Hervig

Loading: November 24, 1999
Departure Leg 1:  November 27, 1999 @ 0900
Arrival Leg 1: December 1, 1999 @ 0800, Snug Harbor
Departure Leg 2: December 1, 1999 @ 1000
Arrival Leg 2: December 4, 1999 @1800
Unloading: December 4, 1999

1.	SCIENCE PERSONNEL

Leg 1
	Luis Tupas - UH Scientist
	Dale Hebel - UH Scientist
	Karin Bjorkman - UH Scientist
	Markus Karner - UH Scientist
	Daniel Sadler - UH Research Associate
	Sarah Kerr- UH Research Associate
Leg 2	
	Luis Tupas - UH Scientist
	Brian Popp - UH Scientist
	Frank Sansone - UH Scientist
	Daniel Sadler - UH Research Associate
	Lance Fujieki- UH Research Associate
	Nicholas Cassar - UH Graduate Student
	Marian Westley - UH Graduate Student
	Laura Galvez - Visiting Graduate Student
	
	
2.	GENERAL SUMMARY

The objective of the cruise was to collect water samples and conduct
experiments at the HOT study site, Station ALOHA. During Leg 1, a
primary production experiment using a free-floating array was conducted
each day. Water samples were collected using  STAG's CTD-Rosette system
with some HOT electronic components. During Leg 2 a free-drifting
sediment trap array was deployed at Station ALOHA and retrieved for
sampling and redeployment at 12 and  24 hours before final retrieval at
48 hours. All objectives of the cruise were accomplished. Guest
scientists and students were able to accomplish their work. Floating
sediment trap array and primary production array deployed and recovered
successfully. No samples were lost during the in-situ incubations.


3.      R/V Ka Imikai O Kanaloa, OFFICERS AND CREW, TECHNICAL SUPPORT

Ship's crew gave excellent support and showed enthusiasm and concern
for our work and were very flexible in receiving changes in our
operational schedule and logistical support. 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 24, 1999; Loading Day

The ship's main deck was configured for HOT equipment. The main lab van
and the rope winch were secured inside the submarine hangar. The
equipment van and second radiation van were secured on the O-2 deck.
All deck and lab equipment were loaded and secured within the ship's
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.

November 27, 1999; start of Leg 1

We departed Snug Harbor at 0900. Fire and abandon ship drills were held
at around 0930. We arrived at Station Kahe at 120. The CTD was tested
and we departed Station Kahe at 1400 for Station ALOHA.

November 28, 1999

Ship arrived at Station ALOHA at 0000. A Go-Flo cast was made at 0300
for the first primary production experiment. The array was deployed at
0600. A CTD cast was made at 0800 for ammonium measurement by Sarah
Kerr, archaea counts by Markus Karner, phosphrous experimetns by Karin
Bjorkman, and the mixing experiment by Louie Tupas and Dale Hebel. A
CTD cast was made at 1400 for Karner and Bjorkman. The primary
production array was retrieved at 1700. A CTD cast was made at 2000 for
Karner.

November 29, 1999

Work continues as scheduled. Go-Flo cast commenced at 0300. Primary
production experiment was deployed without incident at 0600. CTD casts
made at 0800 and 1400. Primary  production experiment retrieved at 1700
and all samples processed shortly after.

November 30, 1999

Work has been proceeding as scheduled without any problems. Go-Flo
cast started at 030o. We received the ARGOS positions by email. .
Primary production experiment was deployed without incident at 0600.
CTD casts made at 0800 and 1400. Primary  production experiment
retrieved at 1700 and all samples processed shortly after. Ship then
proceeded to Honolulu at 1900.

December 1, 1999; end of Leg 1, start of Leg 2

Ship arrived at Snug Harbor at 0700. Personnel and equipment were
exchanged. We departed Snug Harbor at 1000. Fire and abandon ship
drills were held at around 1030. Ship proceeded directly to Station
ALOHA.

December 2, 1999

Ship arrived at Station ALOHA at 0000. A CTD cast was made at 0400 to
collect water for Popp et al. Sediment traps were deployed at 0600. A
short Go-Flo casts was made at 0900. A CTD cast was made at 1000 and
1600. Sediment traps were retrieved and deployed at 1800. A CTD cast
was made at 2200.

December 3, 1999

Sediment traps were retrieved and deployed at 0600. CTD casts were made
at 1000, 1600 and 1900.

December 4, 1999

Sediment trap array was finally retrieved at 0600. Ship began transti
to Honolulu at 0700. We arrived at Snug Harbor at 1700 and proceed with
offload.

Experiments done by core group

1) Profile of leucine uptake
2) Leucine uptake experiments using deck incubations
3) Water mixing experiment

Ancillary investigations done during cruise.

1) Phosphorus experiments by Karin Bjorkman
2) Archaea determiantions by Markus Karner
3) Nitrous oxide experiments by Brian Popp et al.
4) Ammonium determinations by Sarah Kerr
5) Organic matter sampling by Laura Galvez