HOT-19: Chief Scientist Report

Chief Scientist: C. WINN

HOT-19 Cruise Report
SSP Kaimalino
23-27 July 1990 



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

Chris Winn		CS
Ricardo Letelier	GOFS
John Dore		GOFS
Dave Rose		GOFS/REU
Ian Gilbert		GOFS/REU
Stewart Reid		WOCE
Geore Parrish		WOCE
Max Cremer		WOCE
Jef Snyder		WOCE
Marc Rosen		GOFS/WOCE
Chuck Stump		GOFS/U.W. Oxygen
Angela Hardesty		WOCE/U.H. Hilo



Itinerary (approximate local time):
-----------------------------------

23 July
  0800 Depart Snug Harbor
  1200 Arrive Kahe Pt
  1500 Depart Kahe Pt
24 July
  0300 Arrive HOT-site: deploy sediment traps
  0600 WOCE deep casts 4500m
  1000 WOCE cast 2500m
  1500 Commence 1000m cast on 3hr. intervals
25 July
  0130 GoFlo primary production cast
  0430 Deploy in situ array
26 July
  0000 Recover sediment traps
  0200 Depart for Snug Harbor



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

HOT-19 departed Snug Harbor at 0900 aboard the SSP Kaimalino on 23 July
1990. We returned to Snug Harbor at 2100 on 27 July. Kahe Point was
occupied on the outbound transit and approximately 72 hours was spent at
Station ALOHA.


WOCE & JGOFS Sampling

The WOCE deep cast and the CTD burst sampling was obtained on HOT-19.


CTD and XBT Operations

Although there were no serious problems with CTD operations on HOT-19,
there were several minor problems with the pylon. During the cruise,
pylon positions 4, 12 and 18 were removed from service. Also, the flash
fluorometer trace was somewhat noisier than usual, apparently due to
the fluorometer cable which was showing signs of corrosion. XBTs were
dropped en route to Station ALOHA.


Primary Production and Sediment Trap Measurements

Primary production was measured in situ for 12 hours. No on-deck
incubations were conducted. Sediment traps were deployed and recovered
without problems.


Optical Measurements

Optical casts were completed at Kahe Point.


Ancillary projects

Samples were dissolved gases were collected for Charles Keeling of
Scripps and for Steve Emerson and Paul Quay of the University of
Washington. Samples were also collected for UH researchers Lisa Campbell
and Daniel Vaulot and UH graduate students Peter Sedwick, Ricardo
Letelier and John Dore. REU (Research Experience for Undergraduates)
students Dave Rose and Ian Gilbert also obtained samples for their
work.