HOT-101: Chief Scientist Report


Chief Scientist: D. HEBEL



                           HOT 101 Cruise Report
                          R/V Moana Wave (MV 99-01)
                             11-15 Jan., 1999

Personnel List

HOT 101:

WOCE group:
Fernando Santiago-Mandujano*	Research Associate			UH
Craig Nosse             	Research Associate              	UH
Mark Vlenciano			Electronic Technician			UH
Don Wright			Research Associate			UH

JGOFS group:
Dale Hebel              	Chief Scientist (co-PI JGOFS)		UH
Lance Fujieki*			Computer Specialist			UH
Dan Sadler			Research Associate			UH
Karen Bjorkman			Research Associate			UH
Scott Nunnery 			Research Associate			UH
Claudia Benitz-Nelson		Post-Doc				UH
Ursula Magaard			Research Associate			UH
Stephanie Christensen		Research Assistant			UH

Associated projects:
Ken Smith			Scientist				SIO
Roberta Baldwin			Scientist				SIO
Robert Glatts			Scientist				SIO
Jim Carlson			Research Engineer			Seabird
Terri Rust			Research Associate			UH
Eileen McCusker			Technician				MSU

STAG
Will Hervig               	Electronic Technician       		UH-UMC
Dave Gravatt             	Deck Technician              		UH-UMC

* Watch Leader



Itinerary (approximate HST):
----------------------------

Monday,  11 Jan.

0900	Departed Snug Harbor
0935	Fire/abandon ship drill, science meeting
1205	Arrived Kahe Pt. (Sta. 1)
1215	Weight cast (1000 m)
1250	PRR/TSRB casts, aerosol measurements 
1355	s1c1
1500	Departed Kahe



Tuesday,  12 Jan.

0000	Arrived Sta. Aloha (Sta. 2)
0010	Net tow
0030	Net tow
0100	Transit FVGR deployment site
0150 	Arrived deployment site
0215	FVGR deployed (22 53.6'N,157 58.7'W)
0225	Transit station ALOHA
0320	On station
0510	Completed sediment trap deployment  (22 46.18'N,157 59.78'W)
0605	s2c1 (WOCE deep)
1000	Net tow
1030	Net tow 
1105	s2c2
1245	PRR-600/TSRB cast, aerosol measurements
1315	Net tow 
1340	Net tow 
1405	s2c3
1700	s2c4
2000	s2c5
2200	Net tow
2230 	Net tow ???
2300	s2c6

Wednesday,  13 Jan.

0005	Net tow
0030	Net tow
0200	s2c7
0345	Go-Flo cast
0505	s2c8
0655	Deployed primary productivity array (22 45.06'N, 157 59.97'W)
0805	s2c9
1105	s2c10
1215	PRR-600/TSRB cast
1330	Net tow
1405	s2c11
1705	s2c12
1845	Recovered PP array
2000 	s2c13
2300	s2c14

Thursday, 14 Jan.

0035	Pump tanks
0300	s2c15 (second WOCE deep cast)
0610	CTD on deck
0745	Arrived FVGR recovery site
0815	FVGR on deck
0830	Transit sediment traps
1145	Recovered floating sediment traps (22 45.0'N, 158 21.2'W)
1425 	Arrived HALE ALOHA mooring (22 24.94'N, 158 09.57'W)
1615 	s8c1
1830	Transit Snug

	
Friday,  15 Jan.

0730	Arrived Snug Harbor



Narrative:
----------

HOT 101 was conducted aboard the R/V Moana Wave 11-15 Jan. 1999.
Captain Hayes was the master of the vessel and Dale Hebel chief
scientist.  There were a total of 20 participants in the scientific
party composed of 4 WOCE, 8 JGOFS, 6 Ancillary and 2 STAG. We departed
Snug on 11 Jan. occupying stations at, Kahe Pt. (sta. 1), FVGR site,
Station ALOHA (sta. 2) and station 8 (HALE ALOHA).  All routine
operations were carried out without problems and the FVGR (Ken Smith -
SIO) was deployed and retrieved successfully.  Seabird research
engineer Jim Carlson tested a prototype dissolved oxygen sensor with
good results.

CTD operations were conducted at stations 1, 2 and 8.  One CTD cast was
conducted at station 1 and 8 while 15 CTD casts were completed at
Station ALOHA in addition to 3 light casts, 11 net tows, 1 Go-Flo cast,
and usual floating sediment traps and productivity measurements.  All
operations were routine with the exception of additional net tows for
C. B. Nelson, rosette Go-Flo primary productivity comparison, prototype
dissolved oxygen testing and deployment/retrieval of the FVGR.  All
core samples were collected.  All underway measurement systems
(thermosalinograph, ADCP, meteorological instruments, and fluorometer)
were operable (except pCO2) and functioned normally. The seas were
moderate with increased winds throughout the cruise.  Sun photometer
(aerosol) measurements were made only on the first two days of the
cruise with cloudy conditions thereafter during the noon satellite
overpass.


Daily Activities (HST)

7 Jan., 1999
HOT 101 pre-cruise meeting MSB 315.


8 Jan., 1999
Ship loading day.


11 Jan., 1999
Departed Snug Harbor 0900 hrs.  After departure at about the mile buoy
we had the routine fire/abandon ship drill followed by a short science
meeting. Arrived Kahe about 1200 hrs and conducted a 1000 m weight
cast,  PRR/TSRB casts, aerosol measurements and final 1010 m CTD cast
(s1c1).  All equipment functioned properly and all samples collected.

Skies were mostly sunny with calm seas, 5' nnw swell and light winds.
Departed Kahe ~1500 hrs.


12 Jan., 1999
Arrived Station ALOHA ~0000 hrs conducted two net tows before
proceeding to FVGR deployment site.  The FVGR (Ken Smith - SIO) was
successfully deployed approximately 2.5 nm north of the circle
perimeter.  After arriving at the center of Sta. ALOHA we deployed the
floating sediment traps and initiated CTD operations. Six CTD casts
were completed including s2c1 (WOCE deep), s2c2 (WOCE shallow), s2c3
(PC/PN), s2c4 (PPO4), s2c5 (JGOFS-1), and s2c6 (JGOfS-2).  One PRR/TSRB
cast was completed at about noon and 5-6 additional net tows
conducted.  Aerosol measurements were made from the 02 deck in
conjunction with the satellite overpass.  The IES signal was detected
with the 12 khz receiver and dissolved oxygen hysteresis problem were
noted for the primary sensor on various casts.

Skies were mostly sunny with moderate Trades at 12-18 kts, and sea/swell 3-5'.


13 Jan. 1999
All work progressed without problems and according to schedule.  Weather was
good with light trades and relatively flat seas.  Conducted 8 CTD casts
collecting samples for primary productivity rosette/go-flo comparison
(s2c7), ATP (s2c9), P. Si (s2c11) and HPLC pigments (s2c14).  Also
deployed/retrieved PP array, conducted 3 net tows, 1 PRR/TSRB cast and
1 Go-Flo cast.  No aerosol measurements were made due to overcast
skies.


14 Jan. 1999
The weather remained favorable although we did have a period of
extended cloudiness the previous day as a front passed.  Work
progressed according to schedule and all equipment functioned
properly.  Jim Carlson has gotten good/excellent results with his
prototype oxygen sensor and a wealth of data.  Terri and Eileen were
very busy making the most of every sampling opportunity for their N20
work while Karin and Claudia conducted additional sample
collection/experiments  related to their research interests. In
addition, Scott and Stephanie conducted a number of zooplankton grazing
experiments.

After completing the 36 "burst" sampling we ended CTD work at Station
ALOHA with a second WOCE deep cast (s2c15) prior to the successful
recovery of the FVGR by Ken Smith's group.  Following retrieval of the
floating sediment traps (drifted almost due west), we steamed to HALE
ALOHA (station 8) for our final CTD cast (s8c1) before returning to
Honolulu.


15 Jan. 1999
Arrived Snug Harbor 0730 hrs. 



Weather
-------

HOT 101:
The weather was variable with light-moderate winds and seas with
generally clear skies at the beginning of the cruise with increasing
cloudiness thereafter.  Below is listed the cruise bridge log
descriptions and the various values represent the range for that day.
Under wind, sea, and swell there will be two designations, the first is
the direction (in degrees), the second for wind is in kts, sea in
Beauford force, and swell in feet, barometer in inches of Hg, temp C
(dry bulb) and clouds in tenths.


Day Date    Wind           Sea          Swell      Barometer   	  Temp   Clouds

Mon 11 Jan. 080-085,lt-24  080-085,3-4  120-330,5  30.07-30.14 	  72-78  1-4
Tues12 Jan. 085-120,12-18  085-120,3    330,2-5    30.12-30.14    71-80  3-7
Wed 13 Jan. 080-090,12-14  070-090,3    330,3-4    30.12-30.15	  73-78  3-9
Thur14 Jan. 080-100,18-22  080-100,4    330,3-4    30.13-30.19	  73-74  3-8
Fri*15 Jan. 065-070,5-14   065-070,1-3  110-330,3  30.13-30.14	  74     0-3

*Only two entries  (0200 & 0600 hrs)


Equipment and methods:
----------------------
All standard equipment functioned properly				 


Sub component programs:
-----------------------

Investigator:               	Project:
-------------                   --------
Christopher Winn (UH)       	DIC, pH, Alk., pCO2/UH
Bob Bidigare (UH)           	HPLC pigments/UH
Michael Landry (UH)     	zooplankton dynamics/UH


Ancillary programs:
-------------------

Investigator:               	Project:
-------------                   --------
Charles Keeling (SIO)       	CO2 dynamics and intercalibration/SIO
Paul Quay (UW)          	DIC and 13C/UW
Ed Boyle			trace metals/MIT
John Porter			aerosols/UH
Ken Smith			benthic respiration studies
Popp/Holstrom			NO2 dynamics
Abbott/Letelier			optical measurments
Claudia Benitz-Nelson 		phosphorus natural abundance 

Students:
---------
Karin Bjorkman			phosphorus experiments/UH

Others:
-------
Dale Hebel			EOC measurements, PP comparison/UH
Nunnery/Christensen		zooplankton feeding/UH