HOT-22: Chief Scientist Report

Chief Scientist: S. CHISWELL

HOT-22 Cruise Report
R/V Moana Wave
16-20 Dec. 1990 



Personnel List:
---------------

Steve Chiswell		CS
Chris Winn		GOFS
Eric Firing		WOCE
Jef Snyder		WOCE
F. Bahr
Marc Rosen		GOFS/WOCE
Stewart Reid		WOCE
John Dore		GOFS
Ricardo Letelier	GOFS
Dale Hebel		GOFS
Jim Christian		GOFS
Chuck Stump		U.W. Oxygen
J. Lueken		Scripps Institute of Oceanography


Cruise Schedule:
----------------

0800 16 Dec. 1990	Depart Snug Harbor

1100 16 Dec. 1990	Arrive Kahe Pt station

1400 16 Dec. 1990	Depart Kahe Pt station

2300 16 Dec. 1990	Arrive ALOHA, deploy sediment traps

0800 20 Dec. 1990	Recover traps, depart Station ALOHA

2000 20 Dec. 1990	Arrive Snug Harbor



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

HOT-22 departed Snug Harbor at 0800 aboard the R/V Moana Wave on 16
December. Samples were collected en route to Station ALOHA. HOT-22
returned to Snug Harbor at about 1700 on 20 December.


WOCE & JGOFS Sampling

All sampling was completed on HOT-22.


CTD and XBT Operations

Few CTD problems were encountered on HOT-22. However, the hydrowire
kinked during an early cast, producing a gap in our planned CTD burst
sampling. Also, the tensiometer was not working on HOT-22. The CTD
decent speeds were therefore decreased to avoid additional hydrowire
kinks. Consequently, the CTD burst sampling interval was increased.
XBTs were deployed on the return leg from Station ALOHA to Snug
Harbor.


Primary Production and Sediment Trap Measurements

Primary production was measured on HOT-22 with 12-hour in situ
incubations. Sediment traps were deployed and recovered on HOT-22
without significant problems.


Lowered ADCP Operations

Four lowered ADCP casts were conducted on HOT-22.


Optical Measurements

Optical casts were completed at Kahe Point.


Ancillary projects

Samples for dissolved gases were collected for Charles Keeling of
Scripps and for Steve Emerson and Paul Quay of the University of
Washington.