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


HOT-119: Chief Scientist Report


Chief Scientist: D. HEBEL


HOT 119 Cruise Report
R/V Kaimikai O Kanaloa
16-20 Oct., 2000
HALE ALOHA Recovery
(HA8B)
14-15 Oct., 2000



Personnel List
HALE ALOHA Recovery:

JGOFS group:
Dale Hebel              	Scientist (co-PI  JGOFS)  		UH 
Lance Fujieki			Computer Specialist			UH
Terrance Houlihan		Volunteer (Chief Scientist)		MOBY 
Chuck Stump			Scientist				UW
Matthew Erickson		Research Associate			UH

WOCE group:
Mark Valenciano			Electronic Technician			UH


HOT 119:
 
JGOFS group:
Dale Hebel              	Chief Scientist (co-PI JGOFS)  		UH
Lance Fujieki			Computer Specialist			UH
Colleen Allen			Research Associate 			UH
Matt Church			Visiting Graduate Student 		UH
Ann Gasc			Scientist				UH
Matthew Erickson		Research Associate			UH
Karin Bjorkman			Scientist				UH
Ursula Magaard			Research Associate			UH

WOCE group:
Fernando Santiago-Mandujano* 	Research Associate			UH
Lal Ratnapala             	Graduate Assistant              	UH
Mark Valenciano			Electronic Technician			UH
Jeremiah Johnson		Research Associate			UH
Javier Mendez-Nuarez		Volunteer				UH

Associated projects:
Tom Gregory			Research Associate 			UH
Chuck Stump			Scientist				UW

STAG:
Steve Poulos               	Electronic Technician       		UH-UMC
Dave Gravatt             	Deck Technician              		UH-UMC

*Watch Leader




Events log (approximate HST):
Saturday, 14 Oct.
2300	Departed Snug Harbor

Sunday, 15 Oct.
0046	c/c 296 degrees for Kauai
0715	Sighted buoy
0750	All stop at buoy
0756	Transducer in the water
0808	Transducer on deck, no signal
0836	Avon in the water with R. Barnes and C. Gutzeit
0900	Both anemometers and antenna removed from buoy
0905	Tow line on buoy
0916	Tag lines on buoy
0922	Buoy on deck
0929	Avon on deck
1040	Recovery completed
1048	Underway course 117 T
2050	Arrived Snug Harbor, began offloading buoy and equipment 


Monday, 16 Oct.
0900	Departed Snug Harbor
0930	Fire/abandon ship drill, science meeting    
1150	Arrived Kahe Pt. (Sta. 1)
1205 	Weight cast (1000 m)
1250	PRR/TSRB casts 
1340	s1c1
1440	Departed Kahe

Tuesday, 17 Oct.
0000	Arrived Station ALOHA (Sta. 2)
0025	s2c1
0035	CTD on deck
0040	Net tow
0105	Net tow
0145	Began sediment trap deployment
0230 	Completed sediment trap deployment (22o 44.47'N, 157o 59.17'W)
0350	s2c2 (WOCE deep)
0535	s2c2 retrieving from 4770 db
0720	s2c2 on deck
0910	s2c3 (WOCE shallow) 
1010	Net tow
1040	Net tow
1120	PRR/TSRB cast
1200	s2c4
1305	Net tow
1335	Net tow
1400	in situ pumping	 
1520	s2c5
1805	s2c6 
2105	s2c7
2210	Net tow 
2250	Net tow

Wednesday, 18 Oct.
0005	s2c8
0100	Net tow
0150	Net tow
0205	G.O. cast (25 & 45m external closing)	
0300	s2c9
0600	Deployed primary productivity array (22o 45.4'N, 157o 58.9'W)
0610	s2c10
0905  	s2c11
1000	Net tow
1030	Net tow
1120	PRR-600/TSRB cast
1200	s2c12
1300	Net tow
1400	in situ pump
1500	s2c13
1800	Recovered PP array
1810	s2c14 
2100	s2c15	

Thursday, 19 Oct.
0000	s2c16 (WOCE deep-2)
0345	Transit sediment traps
0720	Recovered sediment traps (location ??)
1010	Arrive HALE ALOHA
1035	Transducer deployed and signal received from releases
1100	s8c1
1240 	Transit Kaena Pt.
1750	s6c1
1840	CTD at 2490 m
1930	CTD on deck and began Honolulu transit

Friday 20 Oct.
0700	Arrived Snug Harbor
 


HALE ALOHA Recovery Narrative:

HOT 119 deja vu.  It has not been more than 8 mos earlier that we were
scheduled to go out on HOT 111.  While loading we were informed by, D.
Karl, that he suspected that our deep-sea mooring had broken free and
was adrift.  At that time we assessed the available information and
determined that the buoy was indeed adrift and immediately planned a
recovery operation.  Unfortunately, the ship, which had just received
an upgrade of the SCR engine drive system was experiencing
difficulties.  These difficulties translated into a stream of delays
which encompassed the better part of a week with no immediate
resolution.  During this time we monitored the drift of our way-ward
buoy via Argos positioning and devised a recovery plan that utilized
the UNOLS ship R/V Thomas Thompson which had just completed operations
in Hawaiian waters.  In this regard HOT 119 began with a similar
scenario.  Again we were mobilizing for a HOT cruise when we discovered
that our buoy had broke free, and in a similar situation, the ship
personnel had discovered a problem with the ship which would delay our
departure (this time a hole in the hull).  The repairs were forecasted
at approx. 1 week, therefore we looked into an alternative recovery
vessel.  Due to the forecasted high sea-state these plans were
rejected.  Fortunately, the  repairs proceeded ahead of schedule and it
was determined that we could launch a recovery operation on the KOK
before the official HOT cruise which had been rescheduled for 16-20
Oct.  The recovery was scheduled for the 14-15 Oct. the weekend prior
to the scheduled HOT cruise.

The recovery operation (HA8B) departed on Saturday night to arrive off
the southeaster side of Kaui in the early morning to intercept the
drifting buoy.  Although the seas were forecast in the 18' range, upon
arrival we found 4-6' seas although the winds were steadily increasing
from less than 20 kts to upwards of 30 kts.  During this period the
captain launched a small boat operation to remove valuable
instrumentation from the superstructure of the buoy and secure the buoy
for retrieval.  This action, in addition to the skilled abilities of
STAG deck technician Dave Gravatt resulted in a near perfect
retrieval.  Additional deck support was provided by Terrance Houlihan ,
whom had recently transferred to another project and Chuck Stump from
the Univ. of Washington Seattle.  Through these efforts we were able to
recover all instrumentation with the exception of 2 Seatcats below the
point where the cable separated.  Unfortunately, the MBARI nitrate
analyzers and OSU optical buoy where badly damaged.

Upon retrieval it was apparent that the mooring line had severed at
approximately 560 m where an instrument was mounted on the 5/16 plastic
jacketed steel cable.  At the time of retrieval it appeared that in the
area where the cable parted the upper Seacat and thermistor (?) slid
down the cable (more likely pulled down) to the location of the lower
Seacat.  At the location of the lower Seacat the cable was tightly
twisted around the mounting bracket and it was here that the cable
parted.  Later at UH microscopic examination of the area where the
cable parted suggested that the parting was not the result of an
episodic event (although we did find leader material and components
which appeared to be from a long-line array on the retrieved mooring
line).  Rather, abrasion of the cable.  At this time, I understand that
the severed section of the cable has been sent out for professional
examination.  Following the recovery we returned to Snug Harbor and
offloaded equipment that night in preparation for the followi

HOT 119 Narrative:

The following morning HOT 119 departed aboard the R/V Kaimikai O
Kanaloa (KOK).  Captain Hayes was the master of the vessel and Dale
Hebel chief scientist.  There was a total of 17 participants in the
scientific party composed of 5 WOCE, 8 JGOFS, 2 ancillary investigators
and 2 STAG. We departed Snug on 16 Oct., occupying stations at Kahe Pt.
(sta. 1), Station ALOHA (sta. 2), HALE ALOHA (sta. 8) and Kaena Pt.
(sta. 6).  All scheduled work was completed and all samples collected.
CTD operations were conducted at stations 1, 2, 8 and 6.  One ~1000 m
CTD cast was conducted at stations 1 & 8; 1 <250m, 14 ~1000 m, and 2
~4800 m CTD casts at Station ALOHA; one ~2500m CTD cast at Kaena Pt.
(sta.6).  Other over-the-side operations included 3 light casts, 13 net
tows, 2 in situ pumping operations, 1 G.O. cast, floating sediment
traps and primary productivity array.  All operations were routine with
the exception of an external closing General Oceanics bottle primary
productivity experiment and addition of sta. 6. The underway/continuous
thermosalinograph, ADCP, and fluorometer were operable and functioned
properly. WOCE met. Obs and limited ship met. data were collected as
well as aerosol measurements.  Overall the weather was partly cloudy
with

At Sta. ALOHA the day-day cruise schedule was similar to a generic HOT
cruise (eg., see HOT 111 cruise report). However on HOT 119 we occupied
sta. 8 (HALE ALOHA) even though our mooring was absent marking a change
in protocol to include sta. 8 as a regular station to assess short
spacial variability and again occupied sta. 6 (Kaena Pt.) on the return
leg.





Weather
HALE ALOHA Recovery (Oct. 15) & HOT 119 (Oct. 16-20):

The weather was mostly cloudy skies with moderate seas and wind.  Below
is listed the cruise bridge log descriptions and the various values
representing 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 oF (dry bulb) and clouds in tenths.

Day/Date       Wind           Sea     	   Swell    	Barometer    Temp   Clouds

Sun 15 Oct.    030-090,10-25  030-090,2-4  000-330,3-4  29.92-30.02  77-80  5-9
Mon 16 Oct.    070-090,4-24   070-090,2-4  070-110,2-8  29.90-29.98  77-88  5-8
Tues 17 Oct.   090-100,17-19  090-100,3    090,3-4  	29.94-30.01  75-83  4-8
Wed 18 Oct.    060-100,15-20  060-100,3    090/330,4 	29.94-30.04  74-82  6-9
Thur 19 Oct.   070-090,13-24  070-090,3-4  090,4-6	29.95-30.04  76-81  3-9
Fri. 20 Oct.*  080-100,20-22  080-100,3-4  120-130,3-4  29.98-30.00  72-73  2-5

*Two entries  (0200 & 0600 hrs)


Equipment and methods:  All standard equipment functioned properly and
all methodology was standard.  This was the first cruise to use the new
CTD winch wire.  The wire was lubricated during the second WOCE deep
cast.  Also, the acoustic releases were successfully interrogated at
the HALE ALOHA site.
		 

Sub component programs:

Investigator:               	Project:
-----------------              	----------
Bob Bidigare           		HPLC pigments/UH
Michael Landry   		zooplankton dynamics/UH

Ancillary programs:

Investigator:               	Project:
-----------------              	----------
Charles Keeling       		CO2 dynamics and intercalibration/SIO
Paul Quay           		DIC and 13C/UW
Steve Emerson			O2, N2, Ar, dynamics
John Porter			aerosols/UH
Abbott/Letelier			optical measurements/OSU
Claudia Benitz-Nelson		phosphorus isotopes, Th234/UH

Students:
Matt Church			DOC, Archea dynamics/UH

Others:
Hebel, Dore, Karl		EOC, 1o prod. comparison/UH
Karin Bjorkman			phosphorus experiments/UH
John Dore			phycoerythrin distributions, 
				nitrification rates/UH


Notable events:
1.	Addition of sta. 6
2.	First cruise to use new CTD wire 
3.	Lubrication of new CTD wire
4.	Interrogation of HA acoustic releases
5.	Recovery of drifting HALE ALOHA buoy and instrumentation