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

HOT-140: Chief Scientist Report

Chief Scientist: D. SADLER

Departed:  October 5, 2002 at 0903 (HST)
Returned:  October 9 at 0735 (HST)
Vessel:  R/V Ka'imikai-o-Kanaloa
Operator:  University of Hawaii
Master of the Vessel: Captain Ross Barnes
Chief Scientist: Dan Sadler
STAG Electronics Technician: Gabe Foreman
STAG Deck Operations: Dave Gravatt


The objective of this cruise was to continue building a collection of
hydrographic and biogeochemical data at the Hawaii Ocean
Time-series(HOT) stations.  Four stations were to be occupied during
the cruise, in the following order:

1) Station 1, referred to as Station Kahe, is located at 21° 20.6' N,
158° 16.4' W and was to be occupied on October 5 for about 3 hours.

2) Station 2: ALOHA (A Long Term Oligotrophic Habitat Assessment) is
defined as a circle with a 6 nautical mile radius centered at 22° 45'N,
158° W.  This is the main HOT station and was to be occupied for 3 days
from October 6 though October 8.

3) Station 8: HALE ALOHA is located at 22° 20' N, 158° 10.6' W.
Station 8 was planned to be occupied on October 8 for about 2 hours.

4) Station 6: Located off Kahe Point at 21° 50.8' N, 158° 21.8' W.
Station 6 was planned to be occupied on October 8 for about 3 hours.

A single CTD cast was to be conducted at Station 1 to collect
continuous profiles of various physical and chemical parameters.  Water
samples were to be collected at discrete depths for biogeochemical

Upon arrival at Station ALOHA, a floating sediment trap array was to be
deployed.  A full-depth CTD cast was to be conducted followed by CTD
casts at 3-hour intervals for 36 hours of continuous and discrete data
collection.  Plankton net tows were to be conducted near noon and
midnight on October 6 and 7.  A floating primary production experiment
was to be deployed and recovered on October 7. Following recovery of
the sediment traps on October 8, the ship was scheduled to return to
Station ALOHA for trace metal and optical casts.  Once work was
completed at Station ALOHA, the ship was to transit to Station 8 for a
single 1000 m CTD cast then to Station 6 for a single 2500 m cast. The
ship was scheduled to return to SNUG Harbor at 0800 on October 9 and
unload.  The following instruments were to collect data throughout the
cruise: a shipboard ADCP, a thermosalinograph, a fluorometer and an


WOCE Group:
 Daniel Fitzgerald			Research Associate	UH
 Fernando Santiago-Mandujano 		Research Associate	UH
	(Watch Leader)
 Shimi Rii				Research Associate	UH
 Mark Valenciano			Research Associate	UH
JGOFS Group:
 Thomas Gregory				Research Associate	UH
 Anne Gasc				Research Associate	UH 
 Lance Fujieki				Computer Specialist	UH
 Tara Clemente	(Watch Leader)		Research Associate	UH
 Daniel Sadler (Chief Scientist)	Research Associate	UH
 Jennifer Brum				Graduate Student	UH
 Melinda Simmons			Graduate Student	UH

Ancillary Investigators
 Benjamin Van Mooy			Graduate Student	UW
 Colleen Evans				Graduate Student	UW
 Laurie Juranek				Graduate Student	UW
 Erik Zinser				Postdoc			MIT
 Christina Preston			Scientist		MBARI


All operations at all stations were conducted as planned. Fourteen 1000
m and two 4800 m CTD casts were obtained at Station ALOHA. Single 1000
m casts were obtained at Station Kahe and Hale Aloha.  A 2500 m CTD
cast was completed at Kaena Point.  Also, three PRR/TSRB cast were
performed at Station ALOHA.

M. Simmons successfully completed six plankton net tows.

Weather conditions were favorable throughout the cruise.

The ADCP ran without interruption throughout the cruise, as well as the
fluorometer, thermosalinograph and the ship's anemometer.

All ancillary work was completed and the ancillary investigators on
board reported that they were very satisfied with the cruise.

We arrived back at Snug Harbor on October 9 at 0735.  A full
off-load took place immediately.


The R/V Ka'imikai-o-Kanaloa and her crew continue to deliver excellent
ship support for our work. The officers and crew were most helpful and
accommodating and are to be commended for maintaining high standards.
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.


October 4, 2002; Loading Day

Equipment loaded on this day.  The CTD cable was re-terminated,
followed by a test of the CTD system.

October 5, 2002

The ship departed from Snug harbor at 0916.  Fire and abandon ship
drills were conducted followed by a science meeting to review the
objectives and schedule for the cruise. We arrived at Station Kahe at
1155 and immediately conducted a weight cast (400 lb) to 1000 m. The
PRR and TSRB were completed followed by a 1000 m CTD cast. The ship
departed Station Kahe at 1530 and proceeded to Station ALOHA.

October 6, 2002

We arrived at Station ALOHA at 0056 and immediately conducted a net
tow.  The sediment traps were deployed at 0245 followed by the deep
WOCE cast to 4800 m.  The 36 hour burst CTD sampling began at 0819 and
continued throughout the day. Six 1000 m casts were completed.  Two
additional net tows were completed at 1335 and 2251.

October 7, 2002

Seven 1000 m CTD casts were completed.  The primary production array
was deployed at 0633 and recovered at 1846.  Net tows were completed at
0200 and 1035.  The PRR/TSRB optical packages were deployed at noon.
Two AC-9/FRRf casts were conducted at 0516 and 1348.

October 8, 2002

A 4500 m deep CTD cast was completed at 0243 and the ship proceeded to
the floating sediment trap array which was recovered at 0702.  The ship
returned to Station ALOHA where the ATE was deployed.  Two CTD casts
were conducted to provide water for ancillary investigators. The
PRR/TSRB optical packages were deployed at noon followed by an
AC-9/FRRf cast at 1252.  The ship departed Station ALOHA at 1356 and
transited to Station 8.  We arrived at Station 8 at 1630 and conducted
a 1000 m CTD cast at 1700.  We departed Station 8 at 1804 and transited
to Station 6.  Upon arrival at Station 6 at 2110, a 2500 m CTD cast was
conducted. Station 6 was departed at 2320 and the ship proceeded to
Honolulu Harbor.

October 9, 2002

We arrived at Snug Harbor at 0735.  A full offload took place upon

Below is the cruise bridge log description for HOT-140.  Wind and sea
directions are in degrees, wind speed in knots, seas in Beaufort scale,
swells in feet, barometer in inches Hg, temp in F (dry bulb), clouds in

Date	        Wind        Sea       Swell     Barometer    Temp   Clouds

Sat. 5 October  100, 18	    100, 4    120, 3    29.82-29.94  77-88  7
Sun. 6 October  090, 18-22  090, 4-5  090, 6-8  29.82-29.97  76-82  4-8
Mon. 7 October  085, 16-21  085, 4    090, 6-7  29.93-29.99  76-83  3-8
Tue. 8 October  095, 18-21  095, 4-5  090, 5-6  29.90-29.98  76-82  2-7
Wed. 9 October  085, 10-19  085, 2-4  110, 3    29.90-29.93  76	    2-3

Sub component programs:

Investigator:                   Project:
-----------------               ----------
Bob Bidigare			HPLC pigments/UH
Mike Landry			zooplankton dynamics/UH
John Dore			CO2 dynamics/UH

Ancillary programs:

Investigator:                   Project:
-----------------               ----------
Charles Keeling			CO2 dynamics and intercalibration/SIO
Paul Quay			DI13C and O isotopes/UW
Mark Abbott/Ricardo Letelier	Optical measurements/OSU
Sally Chishom			Prochlorococcus population dynamics/MIT
Claudia Benitez-Nelson		234Th Particle Dynamics/SC


Investigator:                   Project:
-----------------               ----------
Benjamin Van Mooy		Phosphate uptake by marine microorganisms/UW
Laurie Juranek			Primary Productivity with Oxygen Isotopes/UW
Christina Preston		Fosmid libraries from bacterioplankton/MBARI