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R/V Moana Wave
8-16 July, 1996
Personnel List
AC1:
Bjorkman, Karen Visiting Graduate Student Sweden
Cochran , Mat Graduate Student UH
Colman, Albert Visiting Graduate Student Yale
Driscoll Research Associate SIO
Gravett, Dave Deck Technician UH-UMC
Hebel, Dale Chief Scientist UH
Houlihan, Terry Research Associate UH
Landry, Mike Scientist UH
Letelier, Ricardo Scientist OSU
Mutairi, Hussain Graduate Student UH
Ondrusek, Mike Graduate Student UH
Poulos, Steve Electronic Technician UH-UMC
Sadler, Daniel Graduate Student UH
Schottle, Rolff Research Associate SIO
Shackelford, Rachael REU Student UH
Snyder, Jefrey Electronics Technician UH
Thomson, Angie Graduate Student UH
Itinerary (approximate local time):
-----------------------------------
Monday, 8 July
0900 Departed Snug Harbor
0940 Fire, safety, abandon ship drill/science meeting
1240 On station AC1-1 (Kaena Pt.; 21° 29.1 N 158° 22.3W)
1300 PRR cast
1330 TSRB cast
1400 s1c1 (CTD cast)
1530 Plankton net tow
1600 Plankton net tow
1700 Enroute AC1-2 (ALOHA)
Tuesday, 9 July
0020 Arrived AC1-2 ( 22° 45 N 158° 00 W), s2c1(HPLC)
0150 Plankton net tow
0230 Plankton net tow
0400 Go-Flo cast (HOT PP protocol)
0620 Deployed PP array (22° 44.9 N 158° 00.27 W)
0640 Go-Flo cast (Thomson, Bjorkman)
0810 s2c2 (mega samples)
1040 Plankton net tow
1120 Go-Flo cast (Hayward PP protocol)
1220 PRR cast
1245 TSRB cast
1315 Go-Flo cast (Ondrusek)
1400 Plankton net tow
1620 Go-Flo cast (Thomson, Bjorkman ?)
1900 Recovered PP array (22° 54.25 N, 157° 58.61W)
2010 s2c3 (pc/pn/ppo4)
2300 s2c4 (ATP)
Wednesday, 10 July
0040 Departed AC1-2
1200 Arrived AC1-3 (24° 34.1 N, 156° 59.9 W)
1220 PRR cast
1240 TSRB cast
1300 Go-Flo cast (Ondrusek)
1400 Plankton net tow
1420 Plankton net tow
1450 Plankton net tow
1520 Plankton net tow
1600 s3c1 (mega samples; 24° 36.09 N, 156° 58.11W)
1930 s3c2 (200 m CTD cast; pc/pn/ppo4 samples; 24 36.79 N, 156 56.47W)
2010 Departed AC1-3
2050 s3c3 (250 m CTD survey; 24° 41.83 N, 156° 54.36 W)
2110 Underway
2150 s3c4 (250 m CTD survey; 24° 46.44 N, 156° 52.45 W)
2220 Underway
Thursday, 11 July
0820 Arrived AC1-4
0830 s4c1 (mega samples; 26° 22.66 N, 156° 09.78 W)
1010 Plankton net tows
1215 PRR cast
1240 TSRB cast
1300 Go-Flo cast (Ondrusek)
1400 s4c2 (250 m CTD survey; 26° 25.78 N, 156° 03.22W)
1430 Underway
1620 Slowed to 1.5 kts for water sampling
1650 Underway
Friday, 12 July
0030 Arrived AC1-5 (Climax station)
0130 s5c1 (250 m CTD survey cast; 28° 01.11 N, 155°24.22 W)
0200 Go-Flo cast (HOT PP protocol)
0440 Deployed PP array (28° 04.76 N 155° 23.11 W)
0640 Deployed bottom moored sediment trap (28° 06.9 N,155° 21.402 W)
0810 s5c2 (mega samples; 28° 05.57 N, 155° 22.35 W)
0950 Plankton net tows (2)
1050 Go-Flo cast (Hayward PP protocol)
???? Go-Flo cast (MO)
1210 PRR cast
1240 TSRB cast
1420 Wire wrap problems
1450 Wt. cast
1600 s5c3 (pc/pn/ppo4; 28° 06.46 N, 155° 23.47 W)
1740 Located PP array
1800 s5c4 (250 m; 28° 04.95 N, 155° 24.44 W)
1930 Recovered PP array (28° 05.1 N, 155° 25.5 W)
2200 s5c5 (250 m, Venrick & Mikel samples; 28°00.61 N, 155° 23.90 W)
Saturday, 13 July
0010 Plankton net tows
0150 Completed net tows
0510 Go-Flo cast
0610 s5c6 (HPLC, Chl(f), pH; 28° 00.57 N, 155° 23.73 W)
1030 s5c7 (ATP, DO, SPM; 27° 59.08 N, 155° 25.07 W)
1140 Plankton net tows
1300 Completed net tows
1300 Blown hydralic line port crane
1310 Go-Flo cast (Ondrusek)
1350 PRR cast
1410 TSRB cast
1430 s5c8 (SPM, NH4; 28° 00.35 N, 155° 21.99 W)
1610 Triangulation of bottom moored sediment trap
1740 Completed triangulation
1840 Deployed OPC
Sunday, 14 July
1310 Retrieved OPC (battery change)
1320 s6c1 (250 m CTD survey, MO, Chl(f), trico, 02 samples;
25° 58.91 N, 156° 17.62 W)
1340 Plankton net tow
1440 OPC redeployed
Monday, 15 July
0120 Retrieved OPC (battery change)
0130 s7c1 (250 m CTD survey; AT, RL, 02, LLP, Chl(f);(24° 50.22 N,
156° 47.66 W)
0150 Plankton net tows (2)
0240 Completed net tows
0300 OPC redeployed
0930 OPC retrieved
0940 s8c1 (250 m CTD survey; 02; 24° 09.9 N, 157°05.45 W)
1000 Plankton net tow
1040 Underway 10.5 kts
1120 Port engine problems
2110 s9c1 (250 m CTD survey, 02; 22° 46.7 N, 157° 58.6 W)
2140 Underway 10 kts
Tuesday, 16 July
0950 Arrived Snug Harbor
1200 Completed offloading
Narrative:
----------
AC1 (First ALOHA-Climax transect cruise) was a 8 day cruise conducted
8-16 July 1996 aboard the R/V Moana Wave with Capt. Stan Winslow as
Master. The Chief Scientist was Dale Hebel substituting for Dave Karl
who broke his clavicle just days before the cruise. The cruise track
extended from the Hawaiian island of Oahu (~21 15' N, 158 20' W) along
the TOPEX line to station CLIMAX (~28 N, 155 20' W). There were 5
stations numbered sequentially and separate by ~80- 120 nm and at each
station a minimum of a single 1000 m was conducted to measure a suite
of parameters common to all occupied stations and encompassing the
suite of measurements routinely conducted at Station ALOHA.. In
addition, extended water column measurements and experiments were
conducted at both ALOHA and CLIMAX stations.
The primary purpose of the cruise was to:
1). Determine regional variability and gradients in
selected biogeochemical and physical
parameters from Oahu to CLIMAX
2). Assessment of upper water column characteristics
at CLIMAX using "modern" techniques (e.g.,
FCM, HPLC, trace metal clean PP, LLN, LLP,LPS)
3). Comparison (and diel studies) of depth specific
phytoplankton and mesozooplankton
communities with near synoptic resolution (within days) at
ALOHA and CLIMAX
4). Determine regional variability in phosphorus pool
inventories and dynamics
5). Determine along-track variability in particle
concentration at ~45 m
6). Comparison of HOT and CLIMAX primary production
and fluorometric chlorophyll protocols at
ALOHA and CLIMAX
Monday, 8 July (all times local unless noted)
Departed Snug Harbor on time steaming to AC1-1 or Kaena Point station
(see above itinerary for specific time frames of activities and
events). Although this station has the same name as our previous Kaena
Point station it is in a different location. A single cast was
conducted to approximately 1000 m and all samples were collected
including mesozooplankton samples from 2 net tows. Seas were
generally moderate with 10-20 kt winds and mostly clear skies.
Tuesday, 9 July
Arrived ALOHA just about midnight. Since there are no specific shifts
most personnel were available during the ~24 hrs we were on station
grabbing sleep where they could. All scheduled worked was completed
with minimal difficulties except for a wire termination (due to a twist
in the cable) which resulted in a 2-3 hr delay. At ALOHA we completed
4 CTD casts, 4 go-flo casts (our bottles are in really bad shape), 4
net tows, 2 optical casts and a number of personal experiments (one was
Mike Landry's diel time-series at both ALOHA and CLIMAX). We compared
our in-situ primary productivity method to Hayward's primary production
protocols and also compared chlorophyll protocols. The weather was
similar to AC1-1.
Wednesday, 10 July
We departed station ALOHA in the early AM and steamed directly to
AC1-3. Arrived transect station AC-3 approx'ly noon and immediately
began op's. Conducted optics, 4 net tows, 2 CTD casts and continuation
of various experiments. On the first 1000 m CTD cast we noticed a very
unusual fluorometer trace composed of a double peak structure with the
upper peak centered about 40 m and about as large as the usual
chlorophyll max peak at about 120 m. The upper peak was well separated
from the deep chl max peak. After sampling the first CTD cast we
delayed our departure to do another cast (250 m) to see if the
fluorometer trace was still the same, it was so we collected a number
of samples for pc/pn/ppo4. Earlier in the day Landry remarked that the
amount of material caught in his nets was unusually high. Ricardo got
some of the net tow samples and processed it for a number of analyses.
We decided to run up the transect line 5 miles and see if the same
feature was present. It was, so we ran another 5 miles and the same
structure was still present, however, the upper water peak had moved up
to within the upper 20 m. These were shallow casts to 250 m and
designated s3c3 and s3c4 respectively. The sea surface temperature had
also decreased by about 1 degree C relative to ALOHA. The seas and
weather are mild.
Thursday, 11 July
Arrived AC1-4 ~0800 hrs. Conducted 1000 m CTD cast, 4 net tows, PRR
and TSRB casts followed by a Go-Flo cast for Mike Ondrusek and final
250 m CTD cast. The same double peak chl structure is evident here
also although it is present at the surface down to about 40 m.
Departed station ~1430 hrs.
Friday, 12 July
Arrived AC1-5 at ~0030 hrs. Conducted a 250 m CTD survey cast to
determine water column chl structure followed by PP Go-Flo cast,
deployment of bottom moored sediment trap, 1000 m CTD cast, 2 net
tows, PRR &TSRB cast, Go-Flo cast for Haward protocol PP, Go-Flo cast
for Mike Ondrusek, optics casts followed by 3 more CTD casts and
recovery of PP array. All casts and sampling went well with the
exception of a wire overwrap problem which delayed operations for
approximately 2 hrs. The double peaked chl structure seen at stations
AC1-3 & 4 was not evident at AC1-5.
Saturday, 13 July
Operations continued with 4 (?) net tows, 2 Go-Flo casts, optics casts,
3 CTD casts and triangulation of bottom moored sediment traps.
Departed station ~1800 hrs with OPC in tow along the reverse of our
outbound course.
Sunday, 14 July
Continued transect with OPC in tow at 8 kts. Retrieved OPC ~1300 hrs
to change batteries and during this operation conducted 250 m CTD cast
followed by 2 (?) net tows. Redeployed OPC and continued cruise
track.
Monday, 15 July
Retrieved OPC for another battery change ~0100 hrs. Again, conducted
CTD cast and 2 net tows. Redeployed OPC and continued return
transect. Our last station was ALOHA where we retrieved the OPC and
conducted a 250 m CTD cast and net tows before our full speed transect
back to Honolulu to arrive at the designated time. Enroute we
experienced engine problems which delayed our return .
Tuesday, 16 July
Arrived Snug Harbor (Pier 45) 0950 hrs and began offloading
operations. Off loading completed by ~1200 hrs.
Weather:
--------
AC1:
The skies were generally partly cloudy (or partly sunny) with winds
Trades at about 20 kts. As usual seas paralleled the wind direction at
heights of about 4 feet. The swell was consistently out of the east
running about 4 feet also. Barometric pressure slowly increased until
mid cruise then slowly decreased.
Below is listed the cruise log bridge 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, for sea in Beauford force, for
swell in feet, barometer in inches of mercury and clouds in tenths.
Day Date Wind Sea Swell Barometer Clouds
Mon 8 July 010-100, 10-20 010-100, 1-4 080-330, 3-5 29.95-30.02 2-6
Tues 9 July 060-095, 18-22 060-095, 3-4 080-085, 4-5 29.99-30.04 2-6
Wed 10 July 060-090, 18-23 060-090, 4 080, 4-6 30.01-30.18 1-4
Thur 11 July 060-080, 18-20 060-080, 3-4 080-090, 5-6 30.16-30.26 3-7
Fri 12 July 060-090, 17-24 060-090, 2-5 090, 5-6 30.18-30.25 3-10
Sat 13 July 050-085, 16-20 060-085, 4 090, 5-6 30.12-30.18 1-6
Sun 14 July 055-080, 14-18 055-080, 3-5 090, 4-5 30.08-30.11 3-7
Mon 15 July 075-090, 18-30 075-090, 4-6 090, 4-8 30.03-30.12 3-7
Tues* 16 July 090-145, 5-20 090-145, 1-5 090, 6 30.01-30.04 3-4
*Only two entries (0200 and 0600 hrs)
Equipment and methods:
----------------------
All standard equipment used on AC1 functioned properly, however the CTD
signal from the OPC was lost between the first and second battery
change. No equipment was lost although we did experience a short
delay due to retermination of the CTD wire.
Investigators (present on cruise): Project:
---------------------------------- --------
Li/ Winn (UH) DIC, pH, Alk., pCO2
Bidigare/Ondrusek (UH) HPLC pigments, PI curves
Landry/Hussain (UH) Zooplankton dynamics
Letelier (OSU) Optics
Thomson (UH) Phosphorus uptake
Bjorkman (Sweden) Phosphorus bioavailability
Colman (UH) Phosphorus scavenging
Shackelford (UH) LPS
Other Investigators (not present):
----------------------------------
Paul Quay (UW) DIC isotopes
Elizabeth Venrick (UCSD) Phytoplankton taxonomy
Steve Emerson (UW) DOM intercalibration
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Last modified: January 00, 1998